Molecular Nutrition

Whole Year Detection of Body Weight and Serum Biochemical Indicators of Grazing Yaks in Haiyan County, Qinghai Province

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  • 1. State Key Laboratory of Plateau Ecology and Agriculture, Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science of Qinghai Province, Xining 810016, China;
    2. Qinghai Plateau Yak Research Center, Xining 810016, China;
    3. Academy of Science and Veterinary Medicine of Qinghai University, Xining 810016, China

Received date: 2017-03-30

  Online published: 2017-09-28

Abstract

This study aimed to explore the nutritional status of yaks in Haiyan county, the main yak grazing area in Qinghai province, to provided scientific basis for the formulation of targeted supplement measures. The natural forage yield, and dry matter intake, body weight and serum biochemical indicators of grazing yaks in Haiyan county, Qinghai province were determined in September 2015 to August 2016, and the correlation between average daily gain and serum biochemical indictors was analyzed. The results showed as follows:edible grass yield of natural pasture was higher in July than in other months; dry matter intake of grazing yaks was significantly higher in spring than in autumn and winter, and autumn was significantly lower than other seasons (P<0.05); average daily gain was negatively increased in January, February, March, October, November and December, after April, it was increased gradually, and June and July were significantly higher than other months (P<0.05); serum glucose (GLU) was significantly higher in July than in other months except June and October (P<0.05);serum alkaline phosphatase (ALP) activity and urea nitrogen (UN) content were lower in February and March than in other months;the correlation results showed that average daily gain had significant positive correlation with serum UN content (P<0.05). In conclusion, natural forage in October to March of the next year in Haiyan county, Qinghai province is undersupply, average daily gain of yaks is negatively increased, and is gradually increased after April, so it is suggested that under the condition of rotation grazing, feeding mode of natural forage combined with feed supplementation can be applied in October to March of the next year.

Cite this article

FAN Xiaohong, YANG Deyu, HAO Lizhuang, LIU Shujie, CHAI Shatuo, NIU Jianzhang, WANG Xun . Whole Year Detection of Body Weight and Serum Biochemical Indicators of Grazing Yaks in Haiyan County, Qinghai Province[J]. Chinese Journal of Animal Nutrition, 2017 , 29(10) : 3807 -3818 . DOI: 10.3969/j.issn.1006-267x.2017.10.045

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