Asian-Australasian Journal of Animal Sciences
- 제13권7호
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- Pages.1003-1009
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- 2000
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- 1011-2367(pISSN)
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- 1976-5517(eISSN)
DOI QR Code
Nutrient Requirements of Exercising Swamp Buffalo, Bubalus bubalis. II. Details of Work Energy of Cows and Its Relation to Heart Rate
- Mahardika, I.G. (Department of Animal Nutrition, Faculty of Animal Husbandry, Udayana University) ;
- Sastradipradja, D. (Department of Physiology & Pharmacology, Faculty of Veterinary Medicine, Bogor Agricultural University(IPB)) ;
- Sutardi, T. (Department of Animal Nutrition, Faculty of Animal Husbandry, Bogor Agricultural University) ;
- Sumadi, I.K. (Department of Animal Nutrition, Faculty of Animal Husbandry, Udayana University)
- 투고 : 1999.10.13
- 심사 : 2000.01.13
- 발행 : 2000.07.01
초록
Four young swamp buffalo cows of similar age ranging in body weight (W) between 280 to 380 kg and trained for doing physical exercise were used in two consecutive experiments, each using a latin square design, to determine energy expenditure for draught. The experiments consisted of field trials using 4 levels of work load, i.e. no work as control and loads amounting 450 to 500 Newton (N) continuous traction for respectively 1, 2 and 3 h daily for 14 consecutive days for experiment 1, and no work, traction loads equaling 5, 10 and 15% of W for 3 h daily for 14 days for experiment 2. Heart rate during rest and exercise was monitored using PE-3000 HR monitor. Cows were fed only king grass (Penisetum purpuroides) ad libitum and were subjected to balance trials. Body composition was estimated in vivo by the body density method and daily energy expenditure (EE) was calculated from ME minus RE. RE was calculated from the changes in body-protein and -fat measured before and immediately after the 14 d experimental period assuming an energy equivalent of 39.32 MJ/kg fat and 20.07 MJ/kg protein.