Effect of initial age on growth performance, intake and feed efficiency of Chall male lambs

	Effect of initial age on growth performance, intake and feed efficiency of Chall male lambs
علوم و فنون دامپروری
Article 6, Volume 5, Issue 21, March 2017, Pages 57-66 PDF (842.87 K)
DOI: 10.22092/aasrj.2017.110705.1083
Author
nader papi^*
Abstract
This study was conducted to evaluate the effects of initial age on feed intake, growth performance, and efficiency of growing Chall male lambs, using a completely randomized design. Fifty Chall male lambs, averaging 119 ± 24.26 (SD) days of age, and initial body weight 26.4 ± 3.98 (SD) kg, were assigned to three different age groups, including: one, 93 days (n=18); two, 118 days (n=15) and three 148 days (n=17), and fed the same diet (ME=2.58 Mcal/kgDM., CP=15%) in individual box for 84 days. Lambs average daily gain was higher (P<0.05) in 1st group (245 g/day) than the third group (219 g/day). The intake of dry matter, organic matter and crude protein and metabolizable energy were not affected by the lambs age. Feed conversion ratio and feed efficiency were not affected by the lambs age (P<0.05). The results of this study indicated that lambs with initial age of 3 month, had higher performance than the lambs with 5 months.
Keywords
fattening initial age; feed efficiency; Chall male lamb

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