An increase in dietary lipid content from different forms of double-low rapeseed reduces enteric methane emission in Datong yaks on the Qinghai-Tibetan Plateau

Qunying Zhang, Allan Degen, Lizhuang Hao, Yayu Huang, Jianzhang Niu, Xun Wang, Shatuo Chai, Shujie Liu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Enteric methane (CH4) emission in cattle generally decreases by approximately 1 g/g dry matter intake (DMI) with an increase in dietary lipids of 10 g/kg dry matter (DM). The effect of dietary lipids on CH4 emission in yaks has not been reported and is the subject of this study. Four Datong yaks were used in a 4 × 4 Latin-square design in which the four treatments included restricted intakes of double-low rapeseed differing in form and lipid (ether extract—EE) content: (a) rapeseed meal (EE 32.6 g/kg DM); (b) rapeseed meal and rapeseed cake (EE 45.8 g/kg DM); (c) rapeseed meal and whole cracked rapeseed (EE 54.5 g/kg DM) and (d) rapeseed meal and rapeseed oil (EE 62.7 g/kg DM). The digestibility of feed components did not differ among treatments. The ruminal total volatile fatty acids (p =.082) and acetic acid (p =.062) concentrations tended to be lowest in yaks consuming the diet with highest lipid content. In addition, CH4 production was lowest in this group (p =.004), and declined by 1.75 g/g DMI per 10 g/kg DM reduction in dietary lipid content, a rate substantially faster than in cattle.

Original languageEnglish
Article numbere13489
JournalAnimal Science Journal
Volume91
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

  • chamber
  • double-low rapeseed
  • enteric methane production
  • yak

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (all)

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