饲养分级水平的山茶蛋白粉（高达日粮干物质的20%）会降低奶牛的采食量和产奶量，但会提高奶牛乳脂中n-3脂肪酸的浓度

IF 1.2 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Canadian Journal of Animal Science Pub Date : 2023-08-02 DOI:10.1139/cjas-2023-0014

T. Mutsvangwa, Sarah Thomas, R. Newkirk

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引用次数: 0

摘要

本试验采用4 × 4拉丁方设计，研究饲喂0、10、15%和20%亚麻荠粕(CEM)对荷斯坦奶牛产量和乳脂肪酸谱的影响。干物质采食量(DMI)和乳脂含量随CEM的增加呈线性下降，产奶量呈二次下降。随着CEM的增加，C18:2n-6和顺式-9、反式-11 C18:2的乳脂浓度呈线性增加，而C18:3n-3和反式-10、顺式-12 C18:2呈二次增加。结果表明，高达20%的CEM水平会降低DMI和牛奶产量，但会增加牛奶中所需的omega-3脂肪酸的含量。

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Feeding graded levels of camelina expeller meal up to 20% of dietary dry matter decreases feed intake and milk production, but enhances concentrations in milk fat of n-3 fatty acids in dairy cows

Eight Holstein cows were used in a replicated 4 × 4 Latin square design study to determine the effects of feeding 0, 10, 15 and 20% camelina expeller meal (CEM) on production and milk fatty acid profiles. Dry matter intake (DMI) and milk fat content decreased linearly, whereas milk yield decreased quadratically, as CEM increased. Milk fat concentration of C18:2n-6 and cis-9, trans-11 C18:2 increased linearly, whereas that of C18:3n-3 and trans-10, cis-12 C18:2 increased quadratically as CEM increased. Results show that CEM levels up to 20% decrease DMI and milk yield but increase milk contents of desirable omega-3 fatty acids.

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来源期刊

Canadian Journal of Animal Science 农林科学-奶制品与动物科学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Published since 1957, this quarterly journal contains new research on all aspects of animal agriculture and animal products, including breeding and genetics; cellular and molecular biology; growth and development; meat science; modelling animal systems; physiology and endocrinology; ruminant nutrition; non-ruminant nutrition; and welfare, behaviour, and management. It also publishes reviews, letters to the editor, abstracts of technical papers presented at the annual meeting of the Canadian Society of Animal Science, and occasionally conference proceedings.