بررسي تاثير چراي مراتع بروموس – يونجه ديم، آتريپلكس و پس چر غلات بر عملكرد بره هاي نژاد شال

Effect of grazing of pastures of Brom us-Medicago, Amp/ex and cereal straw on Shal sheep breed yield

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 Atrip/ex , and attermath 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 (pO.OS). 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 Atrip/ex 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. Keywords: Atriplex, grazing, Shal sheep, gain.