Merouane et al., 2014. Livest. Res. Rural Dev., 26 (5): 92

Our objective in this study is to estimate the nutritive value of pulp and leaves of argan ( Argania spinosa L.). We exploited two methods: prediction of organic matter digestibility using equations after determination of chemical composition and gas test method. Chemical composition results showed that argan pulp is richer in total sugars (TS) with 15,320,71% to total dry matter (DM), in crude fat (CF) (8,840,85% DM) and in crude cellulose (CC) (8,850,50% DM) with a significant difference (p<0,05) compared to the leaves containing 2,301,12% DM TS, 3,370,61% DM CF and 5,910,15% DM CC. While content of the leaves of total nitrogenized matter (TNM) (12,460,80% DM) is higher (p<0,05) than pulp (4,741,22% DM). The energy value obtained class pulp (digestibility of the organic matter (dOM)=77,240,83%) and leaves (dMO=82,180,32%) of argan as forage of quality having 0,84; 0,85 feed unit milk (FUMi) and 0,76; 0,77 feed unit meat (FUMe) per kg respectively. The leaves appears as a good source of nitrogen with 12,070,96 (g/kg) of digestible matter nitrogenized (DMN) from a total of nitrogenized matter equal to 13,551,04% of the organic matter (OM). Fermentation gas test revealed a fast and important gas production for two samples because of their wealth's in elements quickly fermentable.