Asian-Australasian Journal of Animal Sciences (아세아태평양축산학회지)

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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EFFICIENCY OF PROTEIN UTILIZATION OF FORMALDEHYDE TREATED RAPESEED MEAL BY SHEEP AND ITS INFLUENCE ON CATTLE'S PERFORMANCE

  • Liu, J.X. (Department of Animal Science and Technology, College of Animal Sciences, Zhejiang Agricultural University) ;
  • Wu, Y.M. (College of Animal Sciences, Zhejiang Agricultural University) ;
  • Xu, N.Y. (College of Animal Sciences, Zhejiang Agricultural University) ;
  • Wu, Z.W. (Hangzhou Dairy United Enterprises Corporation)
  • Received : 1993.05.08
  • Accepted : 1993.08.25
  • Published : 1993.12.01

Abstract

This study was purposed to investigate the efficiency of protein utilization of rapeseed meal (RSM) and formaldehyde-treated RSM (TRSM) by sheep, and their influence on performance of growing heifers. Experiment 1 was conducted according to a double $3{\times}3$ Latin square design involving sex yearling Hu Sheep and three experimental diets. All diets contained 600 g ammoniated rice straw and 200 g concentrate mixture. Three dietary treatments were: (1) 100 g RSM + 40 g soybean meal (URUS), (2) 100 g TRSM + 40 g soybean meal (TRUS) and (3) 100 g TRSM + 40 g treated soybean meal (TRTS). Apparent nitrogen digestibility was significantly higher for diet TRUS than that for URUS or TRTS (p<0.05), but with no significant difference between URUS and TRTS (p>0.05). Proportion of nitrogen retention (NR) to the digestible nitrogen intake for diet TRUS and TRTS was 25.57 (p<0.05) and 23.44% (p<0.05) higher than that for URUS respectively. As a result, proportion of NR to nitrogen intake for diet TRUS and TRTS was 34.74 (p<0.05) and 23.78% (p<0.05) higher than that for URUS respectively. Experiment 2 was conducted with 59 Holstein heifers. They were 12-20 months of age at the start of the trial. The experiment was a $2{\times}2$ factorial trial in which the heifers were given the ammoniated rice straw ad libitum and 1.5 kg hay, and supplemented with either RSM or TRSM at a daily allowance of 1.2 or 1.8 kg per day. The live weight gains for heifers receiving 1.2 and 1.8 kg/d of RSM or TRSM were 0.491 and 0.556 or 0.564 and 0.665 kg/d, respectively. The results suggest that formaldehyde treatment can effectively improve the efficiency of protein utilization of rapessed meal and cattle's performance.

Keywords

Rapeseed Meal;Formaldehyde;Ammoniated Rice Straw;Nitrogen Retention;Daily Gain

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Acknowledgement

Supported by : International Foundation for Science