SHORT COMMUNICATION

Effects of Dietary Ether Extract Level on Dynamic Changes of Harmful Gas Emissions of House-Feeding Yaks

  • LIU Yi ,
  • ZHANG Qunying ,
  • BAI Binqiang ,
  • HAO Lizhuang
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  • Qinghai Yak Research Centre, Qinghai Provincial Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science, Provincial and Ministry Co-Construction of the State Key Laboratory of Three-River Source Ecology and Plateau Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China

Received date: 2021-03-31

  Online published: 2021-11-10

Supported by

 

Abstract

The purpose of this experiment was to explore the influence of dietary ether extract level on dynamic changes of harmful gas emissions of house-feeding yaks. The experiment selected 4 healthy Datong steer yaks with body weight of (150±5) kg, using a 4×4 Latin square experiment design, and each phase included a 21-day preliminary trial period and a 7-day trial period. The ether extract levels of the four diets were adjusted by adding rapeseed meal, rapeseed cake, broken rapeseed and rapeseed oil, respectively, and the dietary ether extract levels of the diet were 3.26%, 4.58%, 5.45% and 6.27%, respectively. Use the breath and heat environmental control cabin to simulate the feeding conditions of the house, and dynamically monitor the methane (CH4), carbon dioxide (CO2) and ammonia (NH3) content emitted by the four adult fattening yaks. The results showed that the CH4 emission of rapeseed meal diet group was significantly higher than that of rapeseed cake diet group, broken rapeseed diet group and rapeseed oil diet group (P<0.05), and the CH4 emission of rapeseed cake diet group was significantly higher than that of broken rapeseed diet group and rapeseed oil diet group (P<0.05). The NH3 emission of rapeseed meal diet group was significantly higher than that of broken rapeseed diet group and rapeseed oil diet group (P<0.05). There was no significant difference in CO2 emission among all groups (P>0.05). In summary, increasing the dietary ether extract level can effectively reduce the CH4 and NH3 emissions of house-feeding yaks, and has no significant impact on the CO2 emission.

Cite this article

LIU Yi , ZHANG Qunying , BAI Binqiang , HAO Lizhuang . Effects of Dietary Ether Extract Level on Dynamic Changes of Harmful Gas Emissions of House-Feeding Yaks[J]. Chinese Journal of Animal Nutrition, 2021 , 33(11) : 6584 -6592 . DOI: 10.3969/j.issn.1006-267x.2021.11.056

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