期刊
JOURNAL OF DAIRY RESEARCH
卷 89, 期 4, 页码 355-366出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022029922000784
关键词
Dairy goat; linseed; milk fatty acid; palmitic acid
资金
- Ministere de l'Agriculture, des Pecheries et de l'Alimentation du Quebec
- Agriculture and Agri-Food Canada
The study compared the effects of dietary lipid supplements with different fatty acid compositions on milk performance in early lactation dairy goats fed a high-concentrate diet. The results showed that PALM and FLAX supplementation increased milk fat concentration, with PALM also leading to a slight increase in milk fat yield. The impact of these changes on the nutritive value of dairy products requires further investigation.
We compared the potential of dietary lipid supplements of different fatty acid compositions to affect milk performance when early lactation dairy goats were fed a high-concentrate diet. Thirty Alpine goats at 23 +/- 5 d in milk were allocated to 1 of 10 blocks according to parity and milk fat concentration. Within each block, goats were randomly assigned to receive, during a period of 41 d, either CONT) a basal diet with a forage to concentrate ratio of 45:55, used as control, or PALM) the basal diet + 2% of a palmitic acid-enriched fat supplement, or FLAX) the basal diet + 7% of extruded flaxseed. Body weight, dry matter intake and milk yield were not different between treatments. As compared with CONT, goats fed PALM and FLAX had a greater milk fat concentration. Moreover, milk fat yield was numerically (but non-significantly) greater with PALM than with CONT. Milk fat from goats receiving PALM had a greater concentration of 16:0 as compared with CONT and FLAX, whereas a greater concentration of cis-9, cis-12, cis-15 18:3 was observed when goats were fed FLAX as compared with CONT and PALM. Under the conditions of the current experiment, dietary fat supplementation had only minor impacts on the yield of major milk constituents, with the exception of a modest increase in fat yield when goats were fed PALM. The impact of a greater concentration of 16:0 in milk fat of goats receiving this feed ingredient on the nutritive value of dairy products remains to be determined.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据