Comparison of Gayal (Bos frontalis) and Yunnan Yellow Cattle (Bos taurus): In vitro Dry Matter Digestibility and Gas Production for a Range of Forages

  • Xi, Dongmei (Faculty of Animal Science, Yunnan Agricultural University) ;
  • Wanapat, Metha (Department of Animal Science, Faculty of Agriculture, Khon Kaen University) ;
  • Deng, Weidong (Faculty of Animal Science, Yunnan Agricultural University) ;
  • He, Tianbao (Nujiang District Animal Science and Veterinary Bureau) ;
  • Yang, Zhifang (Nujiang District Animal Science and Veterinary Bureau) ;
  • Mao, Huaming (Faculty of Animal Science, Yunnan Agricultural University)
  • Received : 2006.12.11
  • Accepted : 2007.05.21
  • Published : 2007.08.01


Three male Gayal, two years of age and with a mean live weight of $203{\pm}26$ kg, and three adult Yunnan Yellow Cattle, with a mean live weight of $338{\pm}18$ kg were fed a ration of pelleted lucerne hay and used to collect rumen fluid for in vitro measurements of digestibilities and gas production from fermentation of a range of forages. The forages were: bamboo stems, bamboo twigs, bamboo leaves, rice straw, barley straw, annual ryegrass hay, smooth vetch hay and pelleted lucerne hay. There were significant (p<0.05) effects of the source of rumen fluid on in vitro dry matter digestibility (IVDMD) and gas production during fermentation of forage. For the roughage of lowest quality (bamboo stems and rice straw), gas production during fermentation was higher (p<0.05) in the presence of rumen fluid from Gayal than Yunnan Yellow Cattle. Differences for these parameters were found for the better quality roughages with gas production being enhanced in the presence of rumen fluid from Yunnan Yellow Cattle. Moreover, the IVDMD of investigated roughages was significantly higher (p<0.05) in Gayal than Yunnan Yellow Cattle. The results offer an explanation for the positive live weight gains recorded for Gayal foraging in their natural environment where the normal diet consists of poor quality roughages.


Supported by : Yunnan Provincial Education Commission


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