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
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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
Growth of store lambs on cereal-based diets with protein or urea
E. R. Ørskov,D. A. Grubb +1 more
TL;DR: In this paper, two experiments were conducted on the fattening of 8- to 10-month-old lambs weighing about 40 to 55 kg live weight, using diets based on whole barley sprayed with a solution of urea and minerals or supplemented with a pelleted fish-protein concentrate.
Journal ArticleDOI
Effects of lasalocid and protein levels on the performance of Awassi lambs
TL;DR: In this article, a 2×2 factorial experiment was carried out to evaluate the effects of adding lasalocid (25 ton−1 active ingredient) to the diets of 94 fattened lambs of mixed sexes.
Theoretical considerations for partitioning nutrients between muscle and adipose tissue
Waghorn Gc,Wolff Je +1 more
TL;DR: Two techniques used for its quantitation are described to provide examples of the methods needed to elucidate the control of nutrient utilisation and ultimately body composition in ruminants.
Journal ArticleDOI
Field bean (Vicia faba var. minor) as a protein feed for growing lambs with and without protected lysine and methionine supplementation
Mauro Antongiovanni,Anna Acciaioli,Oreste Franci,Maria Paola Ponzetta,Carolina Pugliese,Arianna Buccioni,Marco Badii +6 more
TL;DR: It is concluded that field bean may represent a valid alternative to soy bean as a protein feed for growing ruminants in the so-called “organic” animal production where transgenic soy is banned.
Book Chapter
Nutrition and meat production
TL;DR: Nutritio11al treatme11t, especially of dietary protei11 a11d e11ergy variables, is the most importaJ1t e11viro11me11tal factor affecti11g meat productio11 i11 goats.
References
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Protein utilization in ruminants. i. blood urea nitrogen as affected by protein intake.
Related Papers (5)
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