Effect of initial weight on growth performance, intake and feed efficiency of Chall mail lambs | ||
| علوم و فنون دامپروری | ||
| Article 4, Volume 5, Issue 18, June 2016, Pages 31-38 PDF (721.49 K) | ||
| DOI: 10.22092/aasrj.2016.107073 | ||
| Author | ||
| nader papi* | ||
| Abstract | ||
| This study was conducted to evaluate the effects of initial weight on feed intake, growth performance, and efficiency of growing Chall mail lambs, using a completely randomized design. Forty eight Chall male lambs, averaging 119 ± 24 (SD) days of age, and initial body weight 26.4 ± 4 (SD) kg, were assigned to four different weight groups, including: one, 18-22 kg; two, 22-26 kg; three, 26-30 kg and four, > 30 kg, and fed the same diet in individual box for 84 days. Lambs average daily gain was higher (P<0.05) in 1st,2nd and 3rd groups (respectively 245, 240 and 233 g/day) than the forth group (202 g/day).The highest (P<0.05) intake of dry matter, organic matter and crude protein and metabolizable energy was observed in lambs of the third and fourth groups. Feed conversion ratio was significantly (P<0.05) different in first (5.27) and second (5.70) groups as compared to the third (6.14) and fourth (7.29) groups. The resuls of this study indicated that lambs with initial live weight of 18-26 kg, had higher performance than the lambs with higher initial live weights. | ||
| Keywords | ||
| Initial weight; Fattening performance; feed intake; Live weight; Chall lamb | ||
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