title: 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.
abstract: 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.
authors.affiliation: Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Japan. hita@cc.tuat.ac.jp
authors.forename: Hiroko
authors.initials: H
authors.lastname: Shibata
authors.forename: Natsuko
authors.initials: N
authors.lastname: Hashizume
authors.forename: Masudur R
authors.initials: MR
authors.lastname: Gazi
authors.forename: Kenji
authors.initials: K
authors.lastname: Sera
authors.forename: Eisei
authors.initials: E
authors.lastname: Kato
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Ohmori
authors.forename: Michio
authors.initials: M
authors.lastname: Kanbe
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Obara
authors.forename: Shuhei
authors.initials: S
authors.lastname: Kanda
authors.forename: Yuzo
authors.initials: Y
authors.lastname: Kurokawa
authors.forename: Hisao
authors.initials: H
authors.lastname: Itabashi
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D005227:Fatty Acids / Q000494:pharmacology*; D005260:Female; D005285:Fermentation; D007774:Lactation / Q000187:drug effects / Q000502:physiology*; D019787:Linoleic Acid / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D010938:Plant Oils / Q000494:pharmacology*; D012417:Rumen / Q000378:metabolism*; D045730:Soy Foods
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D019787:Linoleic Acid