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Ly et al., 2001. Livest. Res. Rural Dev., 13 (4)

Document reference 
Ly, J. ; Pok Samkol, 2001. Nutritional evaluation of tropical leaves for pigs; Desmanthus (Desmanthus virgatus). Livest. Res. Rural Dev., 13 (4)

Eight Mong Cai castrate male pigs of 17.0 kg mean initial live weight were used according to a balanced change over design to study the nutritive value of desmanthus (Desmanthus virgatus) leaf meal obtained from a plantation cut at 60 days of regrowth. The basal diet (N, 2.82%) consisted of sugar palm (Borassus flabellifer) syrup and fresh water dry fish from which 17.7% was replaced by meal made from sun-dried desmanthus leaves (N, 4.41, NDF 61.0% of dry matter).

Organic matter and N digestibility of the diet significantly decreased as determined either by the direct or the indirect (acid insoluble ash) method when desmanthus was introduced in the diet. DM digestibility estimated by the direct procedure could be predicted by the indirect method (r = 0.73; P<0.001). There were no significant differences between both methods for organic matter, NDF and N digestibility. 

Organic matter, NDF and N digestibility of desmanthus determined by difference revealed a low nutritive value of this type of leaf meal (37.3; 30.3 and 2.0% respectively). In vitro pepsin/pancreatin digestibility of N from desmanthus leaves meal was rather low (22.2%) in accordance with in vivo digestibility results. N retention as percentage of intake was lowest (P<0.001) in pigs fed desmanthus (58.2 and 45.3% for control  and desmanthus diets, respectively) but there was no treatment effect when N retention was related to the amount of digested N (67.6 and 64.3% respectively). 


The use of desmanthus leaf meal in diets for pigs could be justified if methods to increase its nutritive value could be developed.

Citation key 
Ly et al., 2001