Document Type : Research Paper
Authors
1 Ph.D. Candidate, Department of Animal Science, Faculty of Agriculture, University of Razi, Kermanshah, Iran.
2 .. Associate Professor, Department of Animal Science, Faculty of Agriculture, University of Razi, Kermanshah, Iran.
3 Associate Professor, Natural Resources Research and Education Center, Kermanshah, Iran.
Abstract
The aim of this study was to evaluate the effect of growth performance and carcass composition of mahe sanjabi and crossbred Sanjabi × Romanov lambs in mehrgan livestock research station. Nien lambs, 90±3 days old in a completely random design from each group were fed ad libitum for 74 days by a balanced diet, and weightd at at 15-days intervals.in the whole period, Average daily gain, daily feed intake, feed conversation and feed efficiency were determined. four lambs from each group were slaughtered, and the hot and cold carcass andinternal organ weights and were measured. Our results indicated that the average daily gain, feed conversion ratio, feed efficiency sanjabi lambs were more than Sanjabi-Romanov lambs (P<0.05) but The weight of entrails in Sanjabi lambs was less than compared to crossbreed lambs (P>0.05). and hot and cold carcass weight and efficiency of crossbreds were more than sanjabi lambs (P<0.05). tail and thigh weight of Sanjabi lambs better than crossbred lambs in the fattening period. In general, in the whole period of fattening in terms of growth performance, purebred sanjabi lambs were better than crossbreds, while in terms of carcass performance, crossberd lambs were better than purebred sanjabi lambs.
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