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Carob (Ceratonia siliqua)

Description and recommendations

Common names

Carob, locust bean, St John's bread [English], caroube [French], algarrobo, garrofa [Spanish], alfarrobeira [Portuguese], خروب [Arabic], 长角豆 [Chinese], חרוב‎ ḥaruv [Hebrew], キャロブ [Japanese], harnup, keçiboynuzu [Turkish]


  • carob pods, carob bean meal, carob bean flour
  • carob pulp, carob kibbles
  • carob germ meal

Related feed(s)


The carob tree (Ceratonia siliqua L.) is an evergreen shrub or tree cultivated in the Mediterranean area for its sugar-rich pods and gum-containing seeds. It reaches 8-17 m high in the wild but cultivated trees are smaller. It has a broad hemispherical crown, a thick trunk and sturdy branches (Ecocrop, 2011; Battle et al., 1997). The carob tree has an extensive root system with a deep taproot and lateral roots. Its leaves are alternate, pinnate, with or without terminal leaflets, and 10-20 cm long. The dark green leaflets have a very thick epidermis containing large amounts of tannins (Shepperd, 2008). Each tree bears both female and male, or hermaphroditic, flowers (some cultivars may be completely hermaphroditic): plantations should comprise about 12% of pollinators (male or hermaphroditic trees) (Battle et al., 1997; Göhl, 1982). The small and numerous flowers are borne in clusters that grow directly along the branches (Battle et al., 1997). The fruit is an indehiscent straight or curved pod, 10-30 cm long, 1.5-3.5 cm broad and 6- 20 mm thick. The pods have a wrinkled surface that turns dark brown and leathery at maturation. They contain 5 to 18 hard brown seeds (10% of the pod weight) embedded in a sweet thick pulpy substance (Shepperd, 2008; Battle et al., 1997). The seeds, all being the same size, are used as weights in eastern Mediterranean countries: the word "carat" comes from qīrā (قيراط), the Arabic name of the seeds (Göhl, 1982).

The carob tree is a very useful resource. Traditionally, carob pulp has been used for food: roasted and eaten as a snack, roasted and ground to make a cocoa substitute, fermented to make alcohol, or diluted to make carob syrup (Battle et al., 1997). The pods themselves are used as a famine food, as the tree survives and keeps fruiting during periods of scarcity (Freedman, 2009). The most important industrial carob product today is the carob gum, a galactomannan extracted from the seeds (or beans), which is a common food thickener and stabilizer. Feed products derived from the carob trees are the whole ground pods which can be fed to ruminants and non-ruminants, the dried, deseeded sugar-rich pulp, and the carob germ meal (the by-product of gum extraction). Carob leaves are relished by browsing livestock (Battle et al., 1997).

Carob trees also provide a wood used for making utensils and slow-burning charcoal (Shepperd, 2008) and extracted to yield algarrobin, a textile dyeing agent (Morton, 1987). Carob trees are used as an ornamental evergreen species and are helpful in afforestation (Battle et al., 1997).

Note on terminology

There are four main carob feed products: whole carob podscarob pulp (carob kibbles, deseeded carob pods), carob germs (carob germ meal) and the less common carob seeds. The terms carob pod meal and carob bean meal used in the literature often refer to both the whole pods and the deseeded pods (and possibly the germ meal to some extent). The term bean is particularly confusing because it concerns the whole pod and not just the seeds. Likewise, the term carob bean husks may refer to the deseeded pod (including the pulp), rather than just the pod covering.


The carob tree originated from the Middle-East (Turkey, Syria) and was brought by human movement to Greece and Italy, along the North African coast and northwards into Spain and Portugal. It is now an important tree species in the coastal areas of the Mediterranean Basin as it is well adapted to summer drought periods and to the poor calcareous soils of this area (Battle et al., 1997). It is generally found within 30-45°N and 30-40°S and from sea level to an altitude of 500-1000 m (Ecocrop, 2011; Orwa et al., 2009; Battle et al., 1997). Ceratonia siliqua prefers mild winters and hot dry summers. It has low cold tolerance and some 5000 to 6000 hours above 9°C are necessary for pods to ripen. However, the carob tree can resist frost down to -6°C (Battle et al., 1997).

A slow-growing species, the carob tree may live more than a 100 years and begins fruiting after 6 or 7 years of growth (Ecocrop, 2011). The carob tree is drought-hardy and can grow in places with annual rainfall as low as 250-500 mm, though a minimum of 500-550 mm and irrigation is required for commercial production. Carob trees are dew-sensitive and develop only in places where there are less than 220 dew nights per annum (Ecocrop, 2011). Carob trees can grow on a wide range of soils, and are saline tolerant up to 3% NaCl in the soil, but they prefer sandy well-drained loams or calcareous soils with a high lime content (Battle et al., 1997). Carob trees are resistant to termites, heat and fire. They cannot withstand strong winds and waterlogged conditions (Orwa et al., 2009; Battle et al., 1997).

In 2010 it was estimated that there were about 92,000 ha worldwide planted with carob trees, producing a total of 153,000 t of carob beans. Spain and Italy accounted for 50% of the production, followed by Morocco, Portugal, Turkey and Greece (FAO, 2011). Average worldwide yield is 1.7 t/ha (FAO, 2011) but modern production can reach yields of 5-7 t/ha (Battle et al., 1997).


Carob pods are removed manually or mechanically from the branches and collected in nets placed under the trees. Harvesting must be done carefully to avoid damaging the next year's flowers, which are fragile and close to the ripe pods. The fallen pods are air-dried for 48-72 h in a ventilated area (Shepperd, 2008, Battle et al., 1997). Once dried (about 92% DM), the pods are brought to the processing plant where they are crushed to separate the seeds from the pulp. The pulp is ground to different sizes depending on the end market (feed or food) (Battle et al., 1997). For animal feeding, whole pods may also be hammer-milled into carob bean flour or carob bean meal. The seeds have a hard coat that must be removed by acid treatment or roasting. The dehulled seeds are then split into endosperm, which is ground to produce gum, and germs, which are ground and dried to make carob germ meal (Battle et al., 1997).

Environmental impact

N fixing legume

Carob was long believed to be unable to fix nitrogen, but bacteria thought to belong to the Rhizobium genus have been isolated from carob root nodules (El Idrissi et al., 1996).

Agricultural diversification, afforestation and soil erosion control

The carob tree, being hardy, drought- and salt-tolerant, with low orchard management requirements (which allow part-time farming) is a good candidate for agriculture diversification in semi-arid coastal areas. Carob trees may also be helpful in degraded areas threatened by soil erosion and desertification (Battle et al., 1997).

Other environmental services

Carob trees are used as windbreaks around orchards. Because of their dense foliage, they are also helpful buffers against noise from factories, roads and railways (Battle et al., 1997).

Potential constraints


Carob pods and their by-products contain important amounts of tannins and the pods are considered an exceptionally rich source of non-extractable polyphenols (Silanikove et al., 2006). Some 15-20% of these tannins are polyphenols and 25-50% are more or less bound with cell walls (Kotrotsios et al., 2011). Scientific literature reports widely contradictory values for condensed tannins. Some authors report extremely large amounts of condensed tannins (16-20%, Silanikove et al., 2006; Battle et al., 1997), but others give values in the 3-5% range (Priolo et al., 2000), and very low values have also been proposed (< 0.4 % DM; Avallone et al., 1997). Methodological differences may explain theses discrepancies (Silanikove et al., 2006).

These tannins interfere with protein digestibility and may reduce the digestibility of other feeds used together with carob, thus reducing body weight gains (Calixto et al., 1982). The presence of tannins in carob pods has been shown to have deleterious effects on digestion and growth and milk production in ruminants and growth in poultry (Silanikove et al., 2006). One proposed mechanism of action specific to carob tannins is that they trap fat and cholesterol, causing unwanted cholesterol excretion and resulting in hypercholesterolemia. Supplementation with PEG (polyethylene glycol) helps to release the cholesterol, thus countering this effect (Silanikove et al., 2006).

However, it should be noted that carob tannins also have anti-diarrheic properties and that toasted carob powder is used to that effect in children (Lizardo et al., 2002).


In green non-ripe pods, condensed tannins cause a strong astringency taste in the mouth, making the pods unpalatable. This astringency decreases during ripening, due the polymerization and condensation of tannins, making the ripe pod more palatable (Silanikove et al., 2006). Also, carob pods contain free iso-butyric acid (about 0.6-0.9% DM) that give them a specific cheese-like odour, which may have positive or negative consequences on palatability (Berna et al., 1997). However, much lower values (<0.05% DM) have been reported for deseeded pods (Iipumbu, 2008).

Nutritional attributes

Carob pods and other carob products are valuable feeds, but as noted in Potential constraints, their inclusion in animal diets may be limited by their tannin content.

Carob pods

Carob pods are a source of non-structural carbohydrates (about 45% DM) and therefore of energy. These sugars consist mostly of sucrose (Battle et al., 1997), which make the pods highly palatable for most animal species. Some authors also report large amounts of glucose (Ayaz et al., 2007). Carob pods are a poor source of protein (about 5% DM) with a low lysine content (< 4% of the protein). Fat content is also low (< 1%). Carob lipids are rich in oleic and lineoleic (18:1 and 18:2) fatty acids (Gubbuk et al., 2010). Carob pods have a high fibre content (33% NDF, 31% ADF DM). The lignin content is particularly important (8-25% DM). One reason for the close NDF and ADF value may be that the method of determination of ADF may have caused some kind of polymerization of sugars with the fibre fraction resulting in an artificial increase in apparent ADF content (Milad et al., 2010). Crude fibre content is very low (9% DM) when compared to NDF and ADF. This difference and the large variability in ADF and lignin content could be explained by the presence of tannins, as tannin–protein complexes may be detected as artificial fibre (Silanikove et al., 2006). NDF, ADF, ADL and crude fibre contents are positively and significantly related. Cell wall constituents and crude protein are not correlated with the soluble sugars contents.

Carob germ meal

Carob germ meal is a high-protein ingredient (50% DM) with a better protein quality (lysine > 5% protein) than pod meal. It contains more fat (> 5%) but much less fibre (< 5% crude fibre) than the pods.

Carob seeds

Carob seeds are extremely hard and may evade or resist strong molars, and, unless ground before feeding, pass unharmed through the digestive tract (El-Shatnawi et al., 2001). The DM contains about 18% protein and 42-46% of gum (Ortiz et al., 2004).


Carob pods

Carob pods contain large amounts of sugars, which makes them a good source of energy and very palatable. Carob bean meal has been used as a substitute for grain in the diet for ruminants. Carob pods may be beneficial as a supplement for ruminants under critical feeding conditions (Hall et al., 1977). However, protein supplementation is required when high amounts of carob pods are included into ruminant diets. While tannins can have positive effects in ruminant diets because they increase the bypass protein content (Aharoni et al., 1998), carob tannins are known to be detrimental to growth in ruminants.

Nutritive value

Estimations of the digestibility of carob pods vary widely between references. The CIHEAM tables report an OM digestibility value of 59% (Alibes et al., 1990) while the INRA-AFZ tables give 70% (Sauvant et al., 2004). Carob trials tend to report the digestibility of mixed diets rather than the digestibility of carob pods alone: from one of these experiments, it is possible to calculate an OMD value of 74% (Obeidat et al., 2011). Values of 74-75% estimated by the gas production method have been reported for both the whole pods and kibbles (Karabulut et al., 2006). The OM digestibility (%) of carob pods can also be predicted from crude fibre (CF, % DM):

OMdigestibility = 78.1 - 1,73 CF (n=7, R²=48%, RSD=9.3).

Based on this equation, the mean crude fibre content of 9.0% DM corresponds to an OMD of 63% (close to the CIHEAM value) and to a ME content of 9.6 MJ/kg DM. Carob pod meal is less digestible than other feeds with a similar crude fibre, which may be explained by the detrimental effect of carob tannins on digestibility. High OM digestibility values such as the one reported the INRA-AFZ tables are probably overestimated.

Growing sheep and goats

Inclusion levels in the 20-25% range seem to be appropriate for growing sheep and goats. The replacement of barley grain by carob pods up to 25% in fattening Awassi lambs did not affect feed intake, growth performance, carcass characteristics and meat quality and diet digestibility was only slightly affected by increasing the inclusion rate of carob pods from 12.5% to 25% (Obeidat et al., 2011). However, condensed tannins from carob pulp can be detrimental to feed digestibility and growth performance (Priolo et al., 2000). In Comisana lambs, feeding a diet containing 20% carob pulp in replacement of barley did not affect live weight and most meat quality parameters but resulted in a higher feed intake and a depressed feed conversion ratio (Priolo et al., 1998). Anglo-Nubian kids fed 52% carob pods performed very poorly, with reduced growth rates (-40%) and poor conversion ratios (Silanikove et al., 2006).

Treatment with PEG (polyethylene glycol) has been proved as an effective mean to counteract the negative effects of tannins. For instance, inclusion of 4% PEG in a diet contain 56% of carob pod meal resulted in performance and meat quality similar to the one obtained with the maize-based control diet (Priolo et al., 2000). Similar results have been observed on kids (3.3% PEG, 52% carob meal, Silanikove et al., 2006). Lambs and kids fed high-tannin diets containing carob pulp have a lighter longissimus muscle colour, an effect that is again corrected by PEG supplementation. This effect could be linked with a reduced myoglobin synthesis although iron absorption seemed not to be affected by condensed tannins in sheep (Priolo et al., 2004).

Supplementation with carob pulp (45% as fed) can also alter the composition in minor intramuscular fatty acids in lambs, resulting notably in a lower percentage of conjugated linoleic acid (Vasta et al., 2007; Priolo et al., 2007).

Carob kibbles can be associated with ammoniated straw (45% and 40% of diet DM respectively) as supplementary sources of N for the rumen ecosystem (Milad et al., 2010).

Ewes and lactating goats

It was estimated that carob pods contain sufficient crude protein and energy to meet the maintenance and lactation requirements of ewes in semi-arid rangelands (El-Shatnawi et al., 2001). In dairy goats, a non-forage diet containing an adequate amount of structured fibre, contributed by carob pods (26%) and beet pulp (27%), could replace a ration based on poor quality forage (Rapetti et al., 2005).

Carob seeds

There is little information available on the use of carob seeds for ruminants. It was estimated that carob pods contain sufficient crude protein and energy to meet the maintenance and lactation requirements of ewes in semi-arid rangelands (El-Shatnawi et al., 2001). Gas production of carob seeds was found to be significantly lower than that of carob pods and kibbles, while the estimated OMD (79%) and ME value (11.6 MJ/kg DM) of carob seed were significantly higher. However, the authors caution that the higher crude protein content of the seeds may have resulted in overestimation of OMD and ME (Karabulut et al., 2006).

Carob browse

In Ethiopia, carob foliage compared to 40 other tropical browse species was found to have a very low protein solubility, low DM and rumen degradable protein, coupled with very low values of DM and N disappearance in the intestine (Kaitho et al., 1998). Fibre digestibility significantly decreased in ewes fed carob leaves that contained high concentrations of tannins (Silanikove et al., 1996).


There is limited information available on the use of carob products for pigs. Carob pod meal can be included up to 10-20% DM in pig diets. The high sugar content of carob pods makes them palatable and thus valuable to increase feed intake. They can replace other feeds with high sugar contents (dextrose, starch, milk powder) without adversely affecting feed intake (Kotrotsios et al., 2011). However, an inclusion rate of pod meal to 12.5% DM resulted in a significant decrease in nutrient digestibility during the weaning, growing and fattening periods (Kotrotsios et al., 2010). The depressive effect of carob pod meal on protein digestibility was noted in early trials (Becker et al., 1955).

Small amounts (up to 6%) of carob pod meal in piglet diets have been shown to sustain health and performance after weaning. The prevalence of post-weaning diarrhea tended to be 20% and 33% lower than the control at 3% and 6% inclusion rates respectively (Lizardo et al., 2002).


There is limited information available on the use of carob products in poultry diets.

Carob pods


The use of whole carob pods (including seeds) at an inclusion rate as low as 5% is detrimental to chicken performance (Kratzer et al., 1951). The negative effect of carob meal can be partially overcome when extra protein and/or energy is added to the diet (Kamarinou et al., 1979). For poultry the only available nutrient component seems to be the sugar, and poor results are obtained because of the bulkiness (Göhl, 1982).


In geese, apparent and true metabolizable energy values of carob pods meal were estimated at 6.1 and 6.6 MJ/kg respectively. The inclusion of up to 20% carob pod meal in the diet increased protein digestibility but a 30% inclusion rate resulted in deleterious effects on animal performance (Sahle et al., 1992).

Carob seeds

When seeds were introduced at low levels in poultry diets (6 and 9 %), digestibility of protein and fat was markedly reduced by 13 to 30% and the viscosity of jejunal digesta was increased (Ortiz et al., 2004). As a consequence, carob seeds are regarded as unsuitable for poultry feeding.

Carob germs

Carob germs can be used up to 20% of the diet without supplementation in poultry diets with good results (Göhl, 1982).


Carob pod meal (deseeded)

Carob pod meal has an attractive taste and aroma that improves the palatability of rabbit diets (Cheeke, 1987). It is frequently included at 2–3% of the diet when used primarily as a palatability enhancer (Oriani et al., 1997; Chrastinova et al., 2007). In Spain, higher inclusion levels in the 5-10% range are used when carob pod meal is included (de Blas et al., 1979; Carabaño et al., 1992; Castello et al., 1992). Inclusion levels up to 20% have been tested successfully in Tunisia (Gasmi-Boubaker et al., 2008).

The main nutritional interest of carob pods for rabbits is their high sugar content, which supplies a relatively high digestible energy content (9.00 MJ DE/kg as fed) unusual for a product containing a large amount of lignin (Villamide et al., 2010). This high lignin content is also beneficial to the fibre equilibrium required for the health of the rabbit's digestive tract (Gidenne et al., 2010). On the other hand, carob pods have a low protein content of poor quality, being clearly deficient in lysine and in sulphur containing amino-acids when compared to the requirements for rabbits (Lebas 2004). Furthermore, estimations of protein digestibility vary widely, from 20% (Villamide et al., 2010) to 69% (Gasmi-Boubaker et al., 2008).

Whole carob pods

Whole carob pods are much used in Algeria as an ingredient, in small scale family rabbit units, in addition to wheat bran, particularly during summer and winter (Berchiche et al., 1994; Zerrouki, 2011). The high palatability of whole carob pods for rabbits has been noted (Morton, 1987).

Carob germ meal

Carob germ meal is sometimes used in complete rabbit feeds but at low inclusion levels, about 0.5-1% DM (Nizza et al., 2000).

Horses and donkeys

Carob pods are used to feed horses in some countries, including Italy (Bergero et al., 1991).


Heuzé V., Sauvant D., Tran G., Lebas F., Lessire M., 2013. Carob (Ceratonia siliqua). A programme by INRA, CIRAD, AFZ and FAO. Last updated on October 3, 2013, 8:55


Tables of chemical composition and nutritional value

Main analysis Unit Avg SD Min Max Nb  
Dry matter % as fed 85.3 3.1 79.5 93.0 177  
Crude protein % DM 5.1 0.6 3.4 6.3 143  
Crude fibre % DM 9.0 1.2 7.1 12.0 128  
NDF % DM 33.1 2.7 29.1 39.1 29  
ADF % DM 30.2 4.4 16.8 35.7 26  
Lignin % DM 17.0 4.3 7.8 24.7 30  
Ether extract % DM 0.5 0.2 0.3 1.1 78  
Ash % DM 3.6 0.7 2.4 5.2 128  
Starch (polarimetry) % DM 2.6 5.1 0.0 20.9 15  
Total sugars % DM 44.0 3.8 33.8 51.0 97  
Gross energy MJ/kg DM 17.4   17.4 17.8 2 *
Minerals Unit Avg SD Min Max Nb  
Calcium g/kg DM 4.9 1.7 1.5 8.8 31  
Phosphorus g/kg DM 0.9 0.3 0.5 1.6 31  
Potassium g/kg DM 10.2 1.0 8.5 12.2 12  
Sodium g/kg DM 0.2 0.3 0.0 1.0 15  
Magnesium g/kg DM 0.8 0.3 0.3 1.5 12  
Manganese mg/kg DM 10 3 6 13 6  
Zinc mg/kg DM 6 2 1 8 6  
Copper mg/kg DM 3 3 1 9 6  
Iron mg/kg DM 12 8 5 27 8  
Amino acids Unit Avg SD Min Max Nb  
Alanine % protein 10.6       1  
Arginine % protein 3.2       1  
Aspartic acid % protein 18.3       1  
Cystine % protein 0.8       1  
Glutamic acid % protein 9.7       1  
Glycine % protein 3.6       1  
Histidine % protein 2.8       1  
Isoleucine % protein 3.8       1  
Leucine % protein 9.3       1  
Lysine % protein 3.8   3.4 4.2 2  
Methionine % protein 1.4       1  
Phenylalanine % protein 3.1       1  
Proline % protein 5.8       1  
Serine % protein 6.8       1  
Threonine % protein 5.1       1  
Tryptophan % protein 1.0       1  
Tyrosine % protein 1.7       1  
Valine % protein 9.1       1  
Secondary metabolites Unit Avg SD Min Max Nb  
Tannins (eq. tannic acid) g/kg DM 19.9 6.9 5.0 30.8 19  
Tannins, condensed (eq. catechin) g/kg DM 4.1 4.6 2.1 17.0 10  
Ruminant nutritive values Unit Avg SD Min Max Nb  
OM digestibility, Ruminant % 62.5   58.5 62.5 2 *
OM digestibility, ruminants (gas production) % 75       1  
Energy digestibility, ruminants % 59.0         *
DE ruminants MJ/kg DM 10.3         *
ME ruminants MJ/kg DM 8.7         *
ME ruminants (gas production) MJ/kg DM 11.4       1  
Nitrogen digestibility, ruminants % 26.1         *
Pig nutritive values Unit Avg SD Min Max Nb  
Energy digestibility, growing pig % 48.5         *
DE growing pig MJ/kg DM 8.5         *
MEn growing pig MJ/kg DM 8.2         *
NE growing pig MJ/kg DM 5.8         *
Nitrogen digestibility, growing pig % 69.2         *

The asterisk * indicates that the average value was obtained by an equation.


AFZ, 2011; Alibes et al., 1990; Anon., 1934; Avallone et al., 1997; Ayaz et al., 2007; Fredella et al., 1983; Gasmi-Boubaker et al., 2008; Husby, 1953; Iipumbu, 2008; Karabulut et al., 2006; Kendall et al., 1982; Lizardo et al., 2002; Maymone et al., 1951; Obradovic, 1969; Wolter et al., 1980

Last updated on 27/11/2012 16:09:57

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 83.2 1
Crude protein % DM 7.8 2.5 5.9 10.6 3
Crude fibre % DM 9.9 9.1 10.6 2
NDF % DM 34.0 29.2 38.8 2
ADF % DM 23.6 14.4 32.8 2
Lignin % DM 11.0 6.4 15.7 2
Ether extract % DM 1.8 1.5 0.6 3.5 3
Ash % DM 3.0 0.6 2.4 3.6 3
Starch (polarimetry) % DM 18.9 1
Total sugars % DM 46.0 45.9 46.1 2
Gross energy MJ/kg DM 18.0 *
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 4.9 1
Phosphorus g/kg DM 1.5 1
Secondary metabolites Unit Avg SD Min Max Nb
Tannins, condensed (eq. catechin) g/kg DM 16.0 1
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, ruminants (gas production) % 74 1
ME ruminants (gas production) MJ/kg DM 11.2 1
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 55.2 *
DE growing pig MJ/kg DM 9.9 *
Nitrogen digestibility, growing pig % 71.9 *

The asterisk * indicates that the average value was obtained by an equation.


El-Shatnawi et al., 2001; Fredella et al., 1983; Karabulut et al., 2006

Last updated on 24/10/2012 00:45:40

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 91.7 2.4 89.4 95.5 5
Crude protein % DM 49.4 6.6 44.6 59.9 5
Crude fibre % DM 4.4 3.6 5.2 2
Ether extract % DM 5.6 5.2 5.9 2
Ash % DM 5.4 5.0 5.9 2
Gross energy MJ/kg DM 20.7 *
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 1.1 1
Phosphorus g/kg DM 9.7 1
Amino acids Unit Avg SD Min Max Nb
Alanine % protein 3.4 1.4 1.2 4.3 4
Arginine % protein 8.6 4.9 1.2 11.6 4
Aspartic acid % protein 7.2 0.3 6.8 7.5 4
Cystine % protein 1.5 0.2 1.4 1.8 4
Glutamic acid % protein 24.0 1.2 22.9 25.3 4
Glycine % protein 4.1 1.2 2.1 5.5 5
Histidine % protein 3.4 1.0 2.3 4.7 4
Isoleucine % protein 3.5 0.7 3.0 4.7 5
Leucine % protein 6.0 0.3 5.7 6.4 5
Lysine % protein 5.4 0.3 5.1 5.9 5
Methionine % protein 1.1 0.2 0.8 1.4 5
Phenylalanine % protein 3.3 0.7 2.6 4.5 5
Proline % protein 4.3 1
Serine % protein 4.0 0.2 3.8 4.2 4
Threonine % protein 3.3 0.6 2.8 4.4 5
Tryptophan % protein 1.0 1
Tyrosine % protein 2.8 1
Valine % protein 3.9 0.2 3.6 4.1 5
Secondary metabolites Unit Avg SD Min Max Nb
Tannins (eq. tannic acid) g/kg DM 4.5 1
Ruminant nutritive values Unit Avg SD Min Max Nb
ME ruminants (FAO, 1982) MJ/kg DM 9.9 1
Nitrogen digestibility, ruminants % 90.3 1
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 83.2 *
DE growing pig MJ/kg DM 17.3 *

The asterisk * indicates that the average value was obtained by an equation.


AFZ, 2011; Dijkstra, 1953; Drouliscos et al., 1980; Ferreira, 1964

Last updated on 24/10/2012 00:43:55

Main analysis Unit Avg SD Min Max Nb
Crude protein % DM 17.8 1.0 16.7 18.5 3
Crude fibre % DM 9.8 8.0 11.5 2
NDF % DM 34.0 30.0 38.0 2
ADF % DM 16.2 12.3 20.1 2
Lignin % DM 5.6 1.0 10.2 2
Ether extract % DM 2.9 1.4 1.9 4.9 4
Ash % DM 3.3 2.0 0.4 4.9 4
Starch (polarimetry) % DM 20.9 1
Total sugars % DM 25.2 1
Gross energy MJ/kg DM 18.8 *
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 6.7 1
Phosphorus g/kg DM 1.3 1
Secondary metabolites Unit Avg SD Min Max Nb
Tannins (eq. tannic acid) g/kg DM 32.1 1
Tannins, condensed (eq. catechin) g/kg DM 13.0 8.0 18.0 2
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, Ruminant % 90.9 *
OM digestibility, ruminants (gas production) % 79 1
Energy digestibility, ruminants % 89.2 *
DE ruminants MJ/kg DM 16.8 *
ME ruminants MJ/kg DM 13.7 *
ME ruminants (gas production) MJ/kg DM 11.6 1
ME ruminants (FAO, 1982) MJ/kg DM 12.6 1
Nitrogen digestibility, ruminants % 67.0 1
Pig nutritive values Unit Avg SD Min Max Nb
Energy digestibility, growing pig % 74.8 *
DE growing pig MJ/kg DM 14.1 *
MEn growing pig MJ/kg DM 13.4 *
NE growing pig MJ/kg DM 9.4 *

The asterisk * indicates that the average value was obtained by an equation.


El-Shatnawi et al., 2001; Karabulut et al., 2006; Maymone et al., 1951; Ortiz et al., 2004

Last updated on 24/10/2012 00:43:55

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 92.3 91.9 92.6 2
Crude protein % DM 5.7 4.9 6.4 2
Ash % DM 2.3 1.1 3.5 2

The asterisk * indicates that the average value was obtained by an equation.


Sunvold et al., 1995

Last updated on 24/10/2012 00:45:30

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 51.2 1
Crude protein % DM 9.5 1.2 8.1 10.3 3
Crude fibre % DM 15.9 1
NDF % DM 48.2 3.9 42.5 50.6 4
ADF % DM 32.4 8.9 24.5 40.1 4
Lignin % DM 15.1 5.2 10.2 19.6 4
Ash % DM 5.7 0.4 5.2 5.9 3
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 13.0 1
Phosphorus g/kg DM 1.0 1
Sodium g/kg DM 1.0 1
Secondary metabolites Unit Avg SD Min Max Nb
Tannins, condensed (eq. catechin) g/kg DM 7.0 1
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, Ruminant % 79.4 *
Energy digestibility, ruminants % 76.0 *

The asterisk * indicates that the average value was obtained by an equation.


Ben Salem et al., 2000; Kaitho et al., 1997; Kaitho et al., 1998; Tisserand, 1985

Last updated on 24/10/2012 00:45:36



Aharoni, Y. ; Gilboa, N. ; Silanikove, N., 1998. Models of suppressive effect of tannins. Analysis of the suppressive effect of tannins on ruminal degradation by compartmental models. Anim. Feed Sci. Technol., 71 (3-4): 251-267 web icon
Akande, K. E. ; Doma, U. D. ; Agu, H. O. ; Adamu, H. M., 2010. Major antinutrients found in plant protein sources: their effect on nutrition. Pakistan J. Nutr., 9 (8): 827-832 web icon
Alibes, X. ; Tisserand, J. L., 1990. Tables of the nutritive value for ruminants of Mediterranean forages and by-products. Options Méditerranéennes : Série B Etudes et recherches ; numero 4. CIHEAM 152 p. web icon
Anon., 1934. Analyses of Rhodesian foodstuffs. Rhodesia agric. J., 31: 651-658
Avallone, R. ; Plessi, M. ; Baraldi, M. ; Monzani, A., 1997. Determination of chemical composition of carob (Ceratonia siliqua): protein, fat, carbohydrates, and tannins. J. Food Comp. Anal., 10 (2): 166-172 web icon
Ayaz, F. A. ; Torun, H. ; Ayaz, S. ; Correia, P. J. ; Alaiz, M. ; Sanz, C. ; Gruz, J. ; Strnad, M., 2007. Determination of chemical composition of Anatolian carob pod (Ceratonia siliqua L.): sugars, amino and organic acids, minerals and phenolic compounds. J. Food Quality, 30 (6): 1040-1055 web icon
Battle, I. ; Tous, J., 1997. Carob tree (Ceratonia siliqua L.). Promoting the conservation and use of underutilized and neglected crops. 17. Institute of Plant Genetics and Crop Plant Research, Gatersleben / International Plant Genetic Resources Institute, Rome, Italy web icon
Becker, M. ; Oslage, W. ; Fliegel, H., 1955. Research on the nutritional value of carob for pigs, particulary about the decrease in protein digestibility due the tannic acid of the feed. Arch. Tierernähr., 5 (5-6): 247-256 web icon
Berchiche, M. ; Lebas, F., 1994. Rabbit rearing in Algeria : family farms in the Tizi-ouzou area. First international conference on rabbit production in hot climates, 8 September 1994 (Cairo, Egypt), Options Méditerranéennes, 8: 409-415 web icon
Bergero, D. ; Macagno, G., 1991. Nutrition of horses in the Cuneo district. Obiettivi e Documenti Veterinari, 12 (12): 55-58
Berna, A. ; Pérez-Gago, M. B. ; Guardiola, V. G. ; Salazar, D. ; Mulet, A., 1997. Effect of temperature on isobutyric acid loss during roasting of carob kibble. J. Agric. Food Chem., 45 (10): 4084–4087 web icon
Bornstein, S. ; Lipstein, B.; Alumot, E., 1964. The metabolizable and productive energy of carobs for the growing chick. Poult. Sci., 39: 646-654 web icon
Calixto, F. S. ; Cañellas, J., 1982. Components of nutritional interest in carob pods (Ceratonia siliqua). J. Sci. Food Agric., 33 (12): 1319–1323 web icon
Carabaño, R. ; Fraga, M. J., 1992. The use of local feeds for rabbits. Options Méditerranéennes - Série Séminaires, 17: 141-158 web icon
Castello, J. A. ; Gurri, A., 1992. Effects of energy levels in the feed and the feeding program on performances of growing rabbits. J. Appl. Rabbit Res., 15 (B): 958-964
Cheeke, P. R., 1987. Rabbit feeding and nutrition. Academic Press Inc. Ed., 376p - Orlando, USA web icon
Chrastinova, L. ; Chrenkova, M. ; Laukova, A., 2007. Effect of dietary herbal extracts on health and performance of rabbits. 6 BOKU-Symposium Tierernährung, 15 Nov. 2007, Wien, 144-148
de Blas, J. C. ; Merino, Y. ; Fraga, M. J. ; Galvez, J. F., 1979. A note on the use of sodium hydroxide treated straw pellets in diets for growing rabbits. Anim. Prod., 29 (3) : 427-430 web icon
Dijkstra, N. D., 1953. The digestibility and feeding value of the ground germs of carob bean seeds. Landbouwk. Tijdschr., 65:191
Ecocrop, 2011. Ecocrop database. FAO web icon
El Idrissi, M. M. ; Aujjar, N. ; Belabed, A. ; Dessaux, Y. and Filali-Maltouf, A., 1996. Characterization of rhizobia isolated from Carob tree (Ceratonia siliqua). J. Appl. Microbiol., 80: 165–173 web icon
El-Shatnawi, M. K. J. ; Ereifej K. I., 2001. Chemical composition and livestock ingestion of carob (Ceratonia siliqua L.) seeds. J. Range Manage., 54 (6): 669-673 web icon
Ezdakova, O. D. ; Panaiotu, M. P., 1984. Seeds of carob tree (Ceratonia siliqua) an important feed for farm animals. Voprosy tropicheskogo i subtropicheskogo zhivotnovodstva. 53-59. Moscow, USSR
FAO, 2011. FAOSTAT. Food and Agriculture Organization of the United Nations web icon
Ferreira, M. F., 1964. Unknown title. Bol. Pecuar. Port., 32:5
Freedman, R. L., 2009. Famine foods database. Purdue University web icon
Gasmi-Boubaker, A. ; Bergaoui, R. ; Khaldi, A. ; Mosquera-Mosada, M. R. ; Ketata, A., 2008. First attempt to study carob pulp utilization in rabbit feeding. World J. Agric. Sci., 4 (1): 67-70 web icon
Gidenne, T.; García, J.; Lebas, F.; Licois, D., 2010. Nutrition and feeding strategy: interactions with pathology. In: Nutrition of the rabbit - 2nd edition. de Blas, C.; Wiseman, J. (Eds). CAB International, UK web icon
Göhl, B., 1982. Les aliments du bétail sous les tropiques. FAO, Division de Production et Santé Animale, Roma, Italy web icon
Gubbuk, H. ; Kafkas, E. ; Guven, D. ; Gunes, E., 2010. Physical and phytochemical profile of wild and domesticated carob (Ceratonia siliqua L.) genotypes. Spanish J. Agric. Res., 8 (4): 1129-1136 web icon
Hall, G. A. B. ; Rodrigues, A. A. ; Borges, F. V., 1977. Evaluation of the seed pod of carob (Ceratonia siliqua) as animal feed. III. Performance and apparent digestibility when fed to sheep. Revista do Centro de Ciencias Rurais, 7 (2): 129-134 web icon
Hall, G. A. B., 1976. Evaluation of the seed pod of carob (Ceratonia siliqua) as animal feed. I. Chemical characterization. Revista do Centro de Ciencias Rurais, 6 (4): 367-373 web icon
Husby, M., 1953. Sorghum grain, carob-bean meal and ground dried potatoes as fodder. Norges Landbrukshoiskole. Flyveblad No. 26
Iipumbu, L., 2008. Compositional analysis of locally cultivated carob (Ceratonia siliqua) cultivars and development of nutritional food products for a range of market sectors. Master of Science in Food Science, Department of Food Science, Faculty of AgriSciences, Stellenbosch University, December 2008 web icon
Kaitho, R. J. ; Umunna, N. N. ; Nsahlai, I. V. ; Tamminga, S. ; Bruchem, J. van; Hanson, J. ; Wouw, M. van de, 1996. Palatability of multipurpose tree species: effect of species and length of study on intake and relative palatability by sheep. Agroforestry Systems, 33 (3): 249-261 web icon
Kaitho, R. J. ; Umunna, N. N. ; Nsahlai, I. V. ; Tamminga, S. ; Bruchem, J. van, 1998. Nitrogen in browse species: ruminal degradability and post-ruminal digestibility measured by mobile nylon bag and in vitro techniques. J. Sci. Food Agric., 76 (4): 488-498 web icon
Kamarinou E. P. ; Walker H. F. ; Michie, W. ; Topps, J. H., 1979. Carob meal as an energy source for poultry. Proc. Nut. Soc., 38:A51 web icon
Karabulut, A. ; Canbolat, O. ; Kamalak, A., 2006. Evaluation of carob, Ceratonia siliqua pods as a feed for sheep. Livest. Res. Rural Dev., 18 (7): 104 web icon
Kotrotsios, N. V. ; Christaki, E. V. ; Bonos, E. M. ; Florou-Paneri, P. C., 2010. The effect of dietary carob pods on nutrient digestibility in weaning, growing and fattening periods of pigs. J. Agric. Food. Environ., 8 (3-4): 779-782 web icon
Kotrotsios, N. ; Christaki, E. ; Bonos, E. ; Florou-Paneri, P. ; Spais, A. B., 2011. Carobs in productive animal nutrition. J. Hellenic Vet. Med. Soc., 62 (1): 48-57 web icon
Kratzer, F. H. ; Williams, D. E., 1951. The value of ground carob in rations for chicks. Poult. Sci., 30 (1):148-150 web icon
Lebas, F., 2004. Reflections on rabbit nutrition with a special emphasis on feed ingredients utilization. Proceedings of the 8th World Rabbit Congress, September 7-10, 2004, Puebla, Mexico 2004 web icon
Lizardo, R. ; Canellas, J. ; Mas, F. ; Torrallardona, D. ; Brufau, J., 2002. Utilisation of carob powder in piglet diets and its influence on growth performance and health after weaning. Journées Rech. Porc., 34: 97-101 web icon
Maymone, B. ; Battaglini, A., 1951. Ricerche sulla digeribilità e sul valore nutritivo delle carrube (Ceratonia siliqua L.). Annali Sper. agr. (N.S.), 5: 721-744
Milad, I. S. ; Rymer, C. ; Radley, R. W., 2010. Effects of ammonia treatment and undegradable protein supplementation on nutrient digestion of sheep fed on wheat straw based diets. Archiva Zootechnica, 13 (1): 39-46 web icon
Morton, J. F., 1987. Carob. In: Fruits of warm climates: 65-69. Florida Flair Books, Miami web icon
Neumark, H., 1970. Personal communication. Volcani Institute of Agricutural Reseach, Israel
Nizza, A. ; Moniello, G., 2000. Meat quality and caecal content characteristics of rabbit according to dietary content and botanical origin of starch. World Rabbit Science, 8 (1): 3-9 web icon
Obeidat, B. S. ; Alrababah, M. A. ; Abdullah, A. Y. ; Alhamad, M. N. ; Gharaibeh, M. A. ; Rababah, T. M. ; Ishmais, M. A. A., 2011. Growth performance and carcass characteristics of Awassi lambs fed diets containing carob pods (Ceratonia siliqua L.). Small Rumin. Res., 96 (2-3): 149-154 web icon
Obradovic, M., 1969. Unpublished data. FAO, Cyprus
Oriani, G. ; Salvatori, G. ; Maiorano, G. ; Belisario, M. A. ; Pastinese, A. ; Manchisi, A. ; Pizzuti, G., 1997. Vitamin E nutritional status and serum lipid pattern in normal weanling rabbits. J. Anim. Sci., 75 (2): 402-408 web icon
Ortiz, L. T. ; Rodriguez, M. L. ; Alzueta, C. ; Rebole, A. ; Centeno, C. ; Trevino, J., 2004. Effect of carob (Ceratonia siliqua L.) seed in broiler chick diets on nutrient digestibility and intestinal viscosity. In: Recent advances of research in antinutritional factors in legume seeds and oilseeds. Eds. Muzquiz, M.; Hill, G. D.; Cuadrado, C.; Pedrosa, M. M. Burbano, C. Proceedings of the fourth international workshop on antinutritional factors in legume seeds and oilseeds, Toledo, Spain, 8-10 March 2004, 239-242 web icon
Orwa, C. ; Mutua, A. ; Kindt, R. ; Jamnadass, R. ; Anthony, S., 2009. Agroforestree Database: a tree reference and selection guide version 4.0. World Agroforestry Centre, Kenya web icon
Priolo, A. ; Lanza, M. ; Biondi, L. ; Pappalardo, P. ; Young, O. A., 1998. Effect of partially replacing dietary barley with 20% carob pulp on postweaning growth, and carcass and meat characteristics of Comisana. Meat Science, 50 (3): 355–363 web icon
Priolo, A. ; Waghorn, G. C. ; Lanza, M. ; Biondi, L. ; Pennisi, P., 2000. Polyethylene glycol as a means for reducing the impact of condensed tannins in carob pulp: effects on lamb growth performance and meat quality. J. Anim. Sci., 78 (4): 810-816 web icon
Priolo, A. ; Salem, H. B., 2004. Effects of dietary condensed tannins on small ruminant productions. Options Méditerranéennes. Série A, Séminaires Méditerranéens, 59: 209-213 web icon
Priolo, A. ; Vasta, V., 2007. Effects of tannin-containing diets on small ruminant meat quality. Italian J. Anim. Sci., 6 (Suppl. 1): 527-530 web icon
Rapetti, L. ; Bava, L. ; Tamburini, A. ; Crovetto, G. M., 2005. Feeding behaviour, digestibility, energy balance and productive performance of lactating goats fed forage-based and forage-free diets. Italian J. Anim. Sci., 4 (1): 71-83 web icon
Sahle, M. ; Coleou, J. ; Haas, C., 1992. Carob pod (Ceratonia siliqua) meal in geese diets. Br. Poult. Sci., 33 (3): 531-541 web icon
Sauvant, D. ; Perez, J. M. ; Tran, G., 2004. Tables INRA-AFZ de composition et de valeur nutritive des matières premières destinées aux animaux d'élevage: 2ème édition. ISBN 2738011586, 306 p. INRA Editions Versailles web icon
Shepperd, W. D., 2008. Ceratonia siliqua L. Carob. USDA FS Agriculture Handbook 727 - The Woody Plant Seed Manual, a handbook on seeds of trees and shrubs web icon
Silanikove, N. ; Gilboa, N. ; Nir, I; Perevolotsky, A. ; Nitsan, Z., 1996. Effect of a daily supplementation of polyethylene glycol on intake and digestion of tannin-containing leaves (Quercus calliprinos, Pistacia lentiscus, and Ceratonia siliqua) by goats. J. Agric. Food Chem., 44: 199−205 web icon
Silanikove, N.; Landau, S.; Or, D.; Kababya, D.; Bruckental, I.; Nitsan, Z., 2006. Analytical approach and effects of condensed tannins in carob pods (Ceratonia siliqua) on feed intake, digestive and metabolic responses of kids. Livest. Sci., 99 (1): 29-38 web icon
Tetik, N. ; Turhan, I. ; Oziyci, H. R. ; Gubbuk, H. ; Karhan, M. ; Ercisli, S., 2011. Physical and chemical characterization of Ceratonia siliqua L. germplasm in Turkey. Scientia Horticulturae, 129 (4): 583-589 web icon
Vasta, V. ; Pennisi, P. ; Lanza, M. ; Barbagallo, D. ; Bella, M. ; Priolo, A., 2007. Intramuscular fatty acid composition of lambs given a tanniniferous diet with or without polyethylene glycol supplementation. Meat Science, 76 (4): 739-745 web icon
Veldmann, B., 2005. Improving rearing conditions: carob pod meal in broiler diets. Kraftfutter, 88 (4): 39-40
Villamide, M. J. ; Maertens, L. ; de Blas, J., 2010. Feed evaluation. In: de Blas, C. ; Wiseman, J. (Eds): 151-162. The nutrition of the rabbit. CAB Publishing web icon
Zerrouki, N., 2011. Alimentation des lapins dans les élevages familiaux en Algérie (Communication personnelle). Unpublished