title: Differences in rumen fermentation characteristics between low-yield and high-yield dairy cows in early lactation.
abstract: Relationship between rumen fermentation parameters, blood biochemical profiles and milk production traits in different yielding dairy cows during early lactation was investigated. Twelve dairy cows were divided into two groups based on their milk yield, that is low-yield (LY) and high-yield (HY) groups. Rumen fluid and blood were collected at 3 weeks prepartum and 4, 8 and 12 weeks postpartum. Results showed that proportions of acetate, propionate to total short chain fatty acids and acetate : propionate ratio were changed (P < 0.05) in both groups during the peripartum period, whereas butyrate and acetate : butyrate ratio were only altered in the HY group. Blood cholesterol, beta-hydroxybutyric acid (BHBA) and glutamic oxaloacetic transaminase in the HY group were higher (P < 0.01) than those in the LY group. Principal component analysis revealed that milk yield and milk compositions were differently clustered between groups. These parameters showed similar direction with dry matter intake in the HY group and adverse direction in the LY group. Linear regression analysis indicated that butyrate was positively correlated with BHBA (P < 0.05) in the HY group. This study suggests that cows in the HY group seem to accommodate appropriately to negative energy balance in early lactation through rumen fermentation.
authors.affiliation: Department of Advanced Agricultural Technology and Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Sofyan
authors.affiliation: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.|Department of Advanced Agricultural Technology and Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Mitsumori
authors.affiliation: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Ohmori
authors.affiliation: Faculty of Agriculture, Shinshu University, Nagano, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Uyeno
authors.affiliation: Toyama Prefectural Agricultural, Forestry and Fisheries Research Center, Toyama, Japan.
authors.forename: Toshiya
authors.initials: T
authors.lastname: Hasunuma
authors.affiliation: Kanagawa Prefectural Livestock Industry Technology Center, Ebina, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Akiyama
authors.affiliation: Ishikawa Prefectural Livestock Research Center, Ishikawa, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: Ibaraki Prefectural Livestock Research Center, Ishioka, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Yokokawa
authors.affiliation: Chiba Prefectural Livestock Research Center, Yachimata, Japan.
authors.forename: Tsuneko
authors.initials: T
authors.lastname: Yamaguchi
authors.affiliation: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Shinkai
authors.affiliation: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Hirako
authors.affiliation: Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Kushibiki
mesh_terms: D020155:3-Hydroxybutyric Acid / Q000097:blood; D000085:Acetates / Q000097:blood / Q000378:metabolism; D000821:Animal Feed; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D002417:Cattle / Q000378:metabolism* / Q000502:physiology*; D002784:Cholesterol / Q000097:blood; D004032:Diet / Q000662:veterinary*; D004734:Energy Metabolism; D005232:Fatty Acids, Volatile / Q000097:blood / Q000378:metabolism; D005260:Female; D005285:Fermentation / Q000502:physiology*; D007774:Lactation / Q000502:physiology*; D008892:Milk / Q000737:chemistry; D058725:Peripartum Period; D011422:Propionates / Q000097:blood / Q000378:metabolism; D012417:Rumen / Q000378:metabolism* / Q000502:physiology*; D013859:Thiocarbamates / Q000097:blood / Q000378:metabolism
chemical_list: D000085:Acetates; D005232:Fatty Acids, Volatile; D011422:Propionates; D013859:Thiocarbamates; C023898:butylate; D002784:Cholesterol; D001219:Aspartate Aminotransferases; D020155:3-Hydroxybutyric Acid
keywords: blood biochemistry; dairy cows; milk production; peripartum period; rumen fermentation