Some energy balances of dairy cows at high day and moderate night temperatures.

Authors

  • A.J.H. van Es
  • M.W.A. Verstegen
  • M.S. Saleh Youssef
  • H.J. Nijkamp

DOI:

https://doi.org/10.18174/njas.v16i2.17418

Abstract

2 lactating Friesian cows, producing 14 and 10 kg milk/day, were used in 3 energy balance expt., each lasting 4 wk. Rations consisted of concentrates with varying amounts of hay or straw. Combinations of day and night temp, examined were 16 degrees /16 degrees , 20 degrees /20 degrees , 25 degrees /25 degrees , 30 degrees /30 degrees and 30 degrees /25 degrees C. At 30 degrees /30 degrees and 30 degrees /25 degrees C, roughage intake was reduced particularly on a high roughage ration. At 30 degrees /25 degrees C there was no influence on methane or urinary energy losses, a small positive effect on digestibility and no or only a small negative effect on the utilization of metabolizable energy for maintenance and production. JDL. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1968-05-01

Issue

Vol. 16 No. 2 (1968)

Section

Papers

License

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