Chemical composition and fatty acid profiles of some local forage resources in southern Tunisia
2014
Ayeb, N | Hammadi, M | Addis, M | Khorchani, T
In arid areas, livestock feed is based on the use of rangelands and other local feeds harvested and dry range species and weeds as natural hay locally called “khortane”. Other resources are commonly used such as dried Stipa tenacissima L. and dried olive leaves. The aim of this study was to evaluate chemical and fatty acid composition of local feeds (khortane, S. tenacissima and dried olive leaves and oat hay). A large variability in chemical composition was observed among the different feeds. Crude protein content was higher in khortane (12.17 per cent DM). S. tenacissima had the highest NDF content (P less than 0.05). The results obtained for the fatty acids composition showed that the highest polyunsaturated fatty acids and monounsaturated fatty acids content were observed in khortane (7.64 and 47.7 per cent respectively). The saturated fatty acids content was higher (P less than 0.05) in S. tenacisima followed by dried olive leaves, oat hay and khortane (67.09, 57.19, 45.99 and 44.66 per cent respectively). The omega-3 was significantly higher (P less than 0.05) in the khortane (24.33 per cent) compared to oat hay, dried olive leaves and S. tenacissima (12.51, 12.49 and 10.25 per cent respectively) because it is rich in pastoral species.
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