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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.

TitleAn increase in dietary lipid content from different forms of double-low rapeseed reduces enteric methane emission in Datong yaks on the Qinghai-Tibetan Plateau.
Publication TypeJournal Article
Year of Publication2020
AuthorsZhang, Q, Degen, A, Hao, L, Huang, Y, Niu, J, Wang, X, Chai, S, Liu, S
JournalAnim Sci J
Volume91
Issue1
Paginatione13489
Date Published2020 Jan
ISSN1740-0929
Abstract

Enteric methane (CH ) 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 CH 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, CH 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.

DOI10.1111/asj.13489
Alternate JournalAnim Sci J
PubMed ID33314599
Grant List2018YFD0502300 / / National Key Research and Development Program of China /
2016YFD0500504 / / National Key Research and Development Program of China /
2019QHSKXRCTJ01 / / Qinghai Provincial Science and Technology Association Young and Middle-aged Technological Talent Support Project /
31660673 / / National Natural Science Foundation of China /
1_7 / / CAS "Light of West China" Program /
2020-ZJ-Y08 / / Reward Project of Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science of Qinghai Province /