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بررسی اثر طول مدت پرواز بر صفات رشد، لاشه و بازده اقتصادی بره های نر نژاد شال

Abstract

twenty four male lambs divided into four groups and were allocated to 90, 105, 120 and 135 days of fattening periods. at the end of each fattening period, lambs were slaughtered. the percentage of cold carcass on the basis of empty body weight in the mentioned periods were 57.0 ± 0.94, 57.5 ±1.7, 59.9 ±3.3 and 62.2 ±4.4, respectively(p

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