Differences in rumen fermentation characteristics between low‐yield and high‐yield dairy cows in early lactation |
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| Authors: | Ahmad Sofyan Makoto Mitsumori Hideyuki Ohmori Yutaka Uyeno Toshiya Hasunuma Kiyoshi Akiyama Hiroshi Yamamoto Hiroaki Yokokawa Tsuneko Yamaguchi Takumi Shinkai Makoto Hirako Shiro Kushibiki |
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| Institution: | 1. Department of Advanced Agricultural Technology and Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan;2. Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan;3. Faculty of Agriculture, Shinshu University, Nagano, Japan;4. Toyama Prefectural Agricultural, Forestry and Fisheries Research Center, Toyama, Japan;5. Kanagawa Prefectural Livestock Industry Technology Center, Ebina, Japan;6. Ishikawa Prefectural Livestock Research Center, Ishikawa, Japan;7. Ibaraki Prefectural Livestock Research Center, Ishioka, Japan;8. Chiba Prefectural Livestock Research Center, Yachimata, Japan |
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| 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. |
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| Keywords: | blood biochemistry dairy cows milk production peripartum period rumen fermentation |
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