Document Type : Research Paper
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Abstract
The performances of Shal sheep breed were investigated in sukling and grazing periods in 2006.with 61 lambs utilized ewes milk 105 days of ages. They had grazed the pastures of Alfalfa-Bromus and Atriplex , and aftermath of barley and wheat respectively. Daily gain of lambs were measured in each periods. Data were analyzed through factorial model and by completely random design. Results indicated that nutrition periods were significantly different (p<0.01) but the factors of sex of lamb, sex period and covariate of initial weight of lamb had not significant(p>0.05). Sukling period had the highest daily gain(182±6 gr/day) . Atriplex and aftermath of barley and wheat had the least performances (42±10 and 68±4 g/day, respectively).This result proves that Atriplex pasture like Alfalfa-Bromus pasture and aftermath of barley and wheat can supply maintenance requirement of lamb. It can be utilized as a source of roughage for grazing intermittence in semi-arid regions.
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