Effect of Air Velocity on the Heat Losses of Sheep and Cattle

作者: K. L. BLAXTER , J. P. JOYCE , F. W. WAINMAN

DOI: 10.1038/1981115B0

关键词:

摘要: EXPERIMENTS in respiration chambers which the ambient air temperature could be accurately controlled showed that below heat production increases response to a fall is calves 13° C (ref. 1), adult cattle 7° 2) and sheep with 4-cm fleece 8° 3). In these experiments movement was less than 0.5 m.p.h., being induced by circulating fans chambers. Little information available about effect of on losses cattle. Alexander4 has shown, however, very large when lambs are exposed blast fan metabolic effects have been noted infant caribou cold windy conditions5. Many practical observations show sheep, indeed their survival, adversely affected winds.

参考文章(7)
N. McC. GRAHAM, Energy Expenditure of Grazing Sheep Nature. ,vol. 196, pp. 289- 289 ,(1962) , 10.1038/196289A0
K. L. Blaxter, F. W. Wainman, Environmental temperature and the energy metabolism and heat emission of steers The Journal of Agricultural Science. ,vol. 56, pp. 81- 90 ,(1961) , 10.1017/S0021859600023832
D. G. Armstrong, K. L. Blaxter, J. L. Clapperton, N. McC. Graham, F. W. Wainman, Heat production and heat emission of two breeds of sheep The Journal of Agricultural Science. ,vol. 55, pp. 395- 401 ,(1960) , 10.1017/S0021859600023297
J. S. Hart, O. Heroux, W. H. Cottle, C. A. Mills, THE INFLUENCE OF CLIMATE ON METABOLIC AND THERMAL RESPONSES OF INFANT CARIBOU Canadian Journal of Zoology. ,vol. 39, pp. 845- 856 ,(1961) , 10.1139/Z61-079
I. E. Coop, M. K. Hill, The energy requirements of sheep for maintenance and gain. II. Grazing sheep The Journal of Agricultural Science. ,vol. 58, pp. 187- 199 ,(1962) , 10.1017/S0021859600010145
E. Gonzalez-Jimenez, K. L. Blaxter, The metabolism and thermal regulation of calves in the first month of life. British Journal of Nutrition. ,vol. 16, pp. 199- 212 ,(1962) , 10.1079/BJN19620021