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Effects of biochanin A on lactational performance,nitrogen metabolism,and blood metabolites in dairy cows

Animal Nutrition 2024年第3期18卷 441-449页

作者： Zhanbo Xiong Yanjun Li Xiaoyin Zhang Shiqi Zhang Kexin Li Nan Zheng Shengguo Zhao Jiaqi Wang State Key Laboratory of Animal Nutrition Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China

Optimizing nitrogen utilization efficiency and mitigating nitrogen losses in cows plays a pivotal role in fostering economic sustainability within contemporary agricultural *** A(BCA),a natural component in red clover,has the potential to improve nitrogen metabolism in dairy *** primary objective of this study was to probe the impact of biochanin A supplementation on lactational performance,nitrogen metabolism,and blood metabolites in dairy cows.A complete randomized block design experiment was conducted over 28 d,involving 36 multiparous Holstein cows(comparable milk yield=37.1±2.90 kg,BW=642±70.0 kg,days in milk=92±8.0 d,and parity=2.4±0.50),which were allocated to three treatment groups:the Control group(with 0 g/d BCA),the Low group(with 10 g/d per cow BCA),and the High group(with 40 g/d per cow BCA).Biochanin A supplementation improved the lactational performance of cows by increasing milk yield by 6.3%(P=0.007)and feed efficiency by 12.7%(P=0.009).Total intestinal apparent digestibility was unaffected by BCA supplementation(P>0.05),but microbial nitrogen was increased by 30.0%(P=0.002)for promoting nitrogen utilization efficiency by 20.7%(P=0.004).Milk competent yields(protein,lactose,and non-fat milk solid)were increased with increasing BCA supplementation(P 0.05).BCA did not affect body health of dairy ***,none of the plasma endocrine hormones were affected(P>0.05).A total of 95 significantly different metabolites were screened from the plasma metabolites of cows in the BCA-added and non-added *** performing an enrichment analysis of the metabolic pathways associated with the different metabolites,six specific pathways were identified:bile acid biosynthesis,aspartate metabolism,pyrimidine metabolism,arginine and proline metabolism,the urea cycle,and ammonia *** inclusion of BCA is suggested to enhance milk yield and modulate nitrogen metabolism by influencing relevant metabolites within the metabolic pathwa

关键词： Biochanin A lactational performance Nutritional metabolism Blood metabolite

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