Journal ArticleDOI
The nutrition of the early weaned lamb:I. The influence of protein concentration and feeding level on rate of gain in body weight
R. P. Andrews,E. R. Ørskov +1 more
TLDR
The results agree reasonably well with estimates of protein requirements for lambs given by the Agricultural Research Council (1965) and the overall optimum dietary crude protein concentration for growth between 16 and 40 kg body weight was about 17·0, 15·0 and 11·0% when the mean digestible energy intake was 3·0.Abstract:
The live-weight gains of male and female lambs were measured during growth from 16 to 40 kg live weight when five cereal-based diets varying in dietary crude protein concentration (from 10 to 20%) were given at three levels in a 5×3×2 factorial design.Males grew faster than females by about 15% (P < 0·001); this difference increased with age and with the amount of feed given (P < 0·05). Growth rate responded linearly to increase in feeding level (P < 0·001) and curvilinearly to increase in dietary protein concentration (P < 0·01). A significant interaction (P < 0·01) occurred whereby growth increased with higher protein concentrations as feeding level increased.At the highest feeding level (near ad libitum) the results suggest that the optimum dietary crude protein concentration for growth was about 17·5, 15·0, 12·5 and 12·5% at body weights of 20, 25, 30 and 35 kg respectively. The overall optimum dietary crude protein concentration for growth between 16 and 40 kg body weight was about 17·0, 15·0 and 11·0% when the mean digestible energy intake was 3·0, 2·6 and 2·1 Mcal/day.The results agree reasonably well with estimates of protein requirements for lambs given by the Agricultural Research Council (1965).read more
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Journal ArticleDOI
Fattening of Polish Lowland lambs on diets with different energy and protein levels
TL;DR: In an experiment conducted on 96 male lambs fattened from 19 to 39 kg on diets containing various levels of crude protein and metabolisable energy no significant differences in daily liveweight gain were noted.
Journal ArticleDOI
Effects of different protein sources of diet on yield and quality of lamb meat
TL;DR: The results obtained in the study of the effects of different protein sources in diet on fattening parameters, yield and quality of meat from weaned lambs are presented in this study.
Journal ArticleDOI
Effect of dietary protein level on growth, carcass characteristics, serum biochemical index, and meat quality of Hu male lambs
Yancan Wang,Qiye Wang,Chunpeng Dai,Jianzhong Li,Pengfei Huang,Yali Li,Xueqin Ding,Jing Huang,Tarique Hussain,Huansheng Yang,Huansheng Yang +10 more
TL;DR: In this article, the effects of dietary protein levels on growth, carcass characteristics, serum biochemical index, and meat quality of Hu male lambs were investigated, and the results showed that the dietary protein had significant effects on amino acid, and fatty acid profiles of the longissimus lumborum (LL) muscle.
Journal ArticleDOI
Optimum Dietary Crude Protein Level for Fattening Yearling Arsi-Bale Lambs
TL;DR: The results of this study indicated that optimum dietary CP for improved growth and feed utilization of yearling Arsi-Bale lambs, growing from 17 to 25 kg is 12% at the specified dietary energy.
References
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Journal ArticleDOI
Protein utilization in ruminants. i. blood urea nitrogen as affected by protein intake.
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The nutrition of the early weaned lamb:II. The effect of dietary protein concentration, feeding level and sex on body composition at two live weights
R. P. Andrews,E. R. Ørskov +1 more