{"title":"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","authors":"T. Mutsvangwa, Sarah Thomas, R. Newkirk","doi":"10.1139/cjas-2023-0014","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":9512,"journal":{"name":"Canadian Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"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\",\"authors\":\"T. Mutsvangwa, Sarah Thomas, R. Newkirk\",\"doi\":\"10.1139/cjas-2023-0014\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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.\",\"PeriodicalId\":9512,\"journal\":{\"name\":\"Canadian Journal of Animal Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2023-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Canadian Journal of Animal Science\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1139/cjas-2023-0014\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"AGRICULTURE, DAIRY & ANIMAL SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Canadian Journal of Animal Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1139/cjas-2023-0014","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}
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.
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.