Floristic and chemical composition of an organic , natural pasture used for fattening lambs in the region of Sidi Bouzid , Tunisia
2014
Hamdi, H | Majdoub-Mathlouthi, L. | Znaidi, I A | Kraiem, K
The present work aimed to determine the botanical composition of a natural pasture in the region of Sidi Bouzid and to study its effect on performances of Barbarine lambs. The floristic composition showed that the plant communities of the natural pasture are characterized by the dominance of annual species (63.2 per cent). Results obtained indicated that the floristic composition revealed the presence of 19 species. The natural pasture composed by Cynodon dactylon (62.3 per cent), Sisymbrium irio (20.7 per cent), Anagallis arvensis (5 per cent), Medicago ciliaris (3.3 per cent) and other species. The botanical composition was represented by grasses (62.4 per cent), cruciferous (21.3 per cent), legumes (3.6 per cent), compositae (2.4 per cent) and other family (10.1 per cent).The chemical composition of the pasture showed a crude protein and fiber content of 10.7 per cent and 25.5 per cent respectively. Lambs grazing under this pasture had a low average daily gain (65.2 g per day) and a fat depth of 2.26 mm. These results indicated that this pasture is characterized by limited energy supply and it should be regenerated in order to assure a sustainable productivity of this production system.
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