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Treatment of barley straw with urea or anhydrous ammonia for growing cattle
Published online by Cambridge University Press: 02 September 2010
Abstract
In experiment 1, nine Hereford × Friesian steers weighing 325 kg were used in a changeover design and offered long barley straw that had been treated with 30 g anhydrous ammonia per kg for 8 weeks, a solution providing 25 g urea per kg straw dry matter or a solution providing 23 g urea and 3 g ammonium sulphate per kg straw dry matter. In addition they were offered 3 kg/day of mineralized rolled barley. In experiment 2, 30 Hereford × Friesian steers weighing 380 kg were used in a continuous growth trial of 10 weeks duration. They were allocated to one of the following barley straw treatments, straw that had been exposed to 30 g anhydrous ammonia per kg for 4 weeks, untreated straw with a urea supplement in the barley or untreated straw. The straw was fed ad libitum with either 2·8 or 4·4 kg rolled barley daily.
The barley straw contained 43 and 27 g crude protein per kg dry matter in experiment 1 and 2 respectively. In both experiments, ammonia treatment increased the crude protein content of the straw and resulted in improved straw intakes and higher live-weight gains. The results of experiment 2 cast doubt on the practice of providing supplementary nitrogen with food based on long barley straw and barley when steers weighing about 400 kg are used.
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- Copyright © British Society of Animal Science 1983
References
REFERENCES
Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Burroughs, W., Headley, H. G., Bethke, R. M. and Gerlaugh, P. 1950. Cellulose digestion in good and poor quality roughages using an artificial rumen. J. Anim. Sci. 9: 513–522.CrossRefGoogle ScholarPubMed
Campling, R. C. and Freer, M. 1966. Factors affecting the voluntary intake of food by cows. 8. Experiments with ground, pelleted roughages. Br. J. Nutr. 20: 229–244.CrossRefGoogle ScholarPubMed
Greenhalgh, J. F. D. and Reid, G. W. 1967. Separating the effects of digestibility and palatability on food intake in ruminant animals. Nature, Lond. 214: 744.CrossRefGoogle Scholar
Horton, G. M. J. 1978. The intake and digestibility of ammoniated cereal straws by cattle. Can. J. Anim. Sci. 58: 471–478.CrossRefGoogle Scholar
Innes, G. M. and Kay, M. 1979. The effect of mechanical processing and urea on straw intake using steers. Anim. Prod. 28: 433 (Abstr.).Google Scholar
Jackson, M. G. 1977. Review article: the alkali treatment of straws. Anim. Feed Sci. Tech. 2: 105–130.CrossRefGoogle Scholar
Lawlor, M. J. and O'shea, J. 1979. The effect of ammoniation on the intake and nutritive value of straw. Anim. Feed Sci. Tech. 4: 169–175.CrossRefGoogle Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1975. Energy allowances and feeding systems for ruminants. Tech. Bull. 33. Her Majesty's Stationery Office, London.Google Scholar
Ørskov, E. R., Tait, C. A. G. and Reid, G. W. 1981. Utilization of ammonia- or urea-treated barley straw as the only feed for dairy heifers. Anim. Prod. 32: 388 (Abstr.).Google Scholar
Solaiman, S. G., Horn, G. W. and Owens, F. N. 1979. Ammonium hydroxide treatment on wheat straw. J. Anim. Sci. 49: 802–808.CrossRefGoogle Scholar
Sundstøl, F., Coxworth, E. and Mowat, D. N. 1978. Improving the nutritive value of straw and other low-quality roughages by treatment with ammonia. WldAnim. Rev. 26: 13–21.Google Scholar