Effect of supplementation of soy sauce oil and Ca salts of fatty acids on rumen fermentation, milk production and conjugated linoleic acid in milk of dairy cows
Effect of supplementation of soy sauce oil and Ca salts of fatty acids on rumen fermentation, milk production and conjugated linoleic acid in milk of dairy cows
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DOI：
10.1111/j.1740-0929.2011.00875.x
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发表时间：
2011-01-01
影响因子：
2
通讯作者：
Itabashi, Hisao
中科院分区：
文献类型：
--
作者：
Shibata, Hiroko;Hashizume, Natsuko;Itabashi, Hisao
本试验选用8头奶牛，研究了日粮中添加酱料油（SO）和脂肪酸钙盐（FA）对瘤胃发酵和产奶量的影响。控制饮食（CO）主要由干草，玉米青贮饲料和浓缩物。在实验日粮中，400克/天每头奶牛的SO或FA（大豆油和菜籽油）补充到CO饮食。试验期为14 d，最后2 d取乳样，最后1 d取瘤胃样。干物质摄入量没有受到影响的治疗。添加SO和FA后，0 h瘤胃原虫数量增加。总挥发性脂肪酸在2小时后喂养的SO饮食相比，CO。牛奶成分产量没有显着差异，虽然脂肪和蛋白质的百分比下降，SO和FA饮食。SO和FA日粮降低了乳脂中C8-C16脂肪酸的比例，提高了C18脂肪酸的比例。添加SO和FA日粮后，乳脂中顺式-9，反式-11共轭亚油酸的比例分别提高了120%和135%。尽管SO日粮对瘤胃发酵有轻微的抑制作用，但未发现对采食量和产奶量的负面影响。
Eight cows were used to evaluate the effects of supplementation of soy sauce oil (SO) or Ca salts of fatty acids (FA) on rumen fermentation and milk production. The control diet (CO) consisted mainly of hay, corn silage and a concentrate. In the experimental diets, 400 g/day per cow of SO or FA (soybean oil and rapeseed oil) was supplemented to the CO diet. Experimental period for the three treatments was 14 days, and milk samples were taken during the last 2 days and rumen sample was taken on the last day. Dry matter intake was not affected by the treatments. The number of rumen protozoa at 0 h increased by SO and FA diets. Total volatile fatty acids at 2 h after feeding of SO diet was decreased compared to CO. The milk composition yield did not differ among treatments, although the percentages of fat and protein were decreased by SO and FA diets. The proportions of C8-C16 fatty acids in milk fat decreased, and those of C18 increased by SO and FA diets. The proportion of cis-9, trans-11 conjugated linoleic acid in milk fat by SO and FA diets increased by 120% and 135%, respectively. In spite of the slight suppression of rumen fermentation by SO diet, negative effects on feed intake and milk production were not detected.