数字农科院2.0

Effect of feeding Bacillus subtilis natto fermentation product on milk production and composition, blood metabolites and rumen fermentation in early lactation dairy cows

文献类型： 外文期刊

作者： Peng, H.;Wang, J. Q.;Kang, H. Y.;Dong, S. H.;Sun, P.;Bu, D. P.;Zhou, L. Y.;Kang, H. Y.;Dong, S. H.

作者机构：

关键词： Bacillus subtilis natto fermentation product;dairy cow;milk production;rumen fermentation

期刊名称： JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION

ISSN： 0931-2439

年卷期： 2012 年 96 卷 3 期

页码：

收录情况： SCI

摘要： This experiment was conducted to determine the effect of Bacillus subtilis natto fermentation product supplementation on blood metabolites, rumen fermentation and milk production and composition in early lactation dairy cows. Thirty-six multiparous Holstein cows (DIM = 29 +/- 6 days, parity = 2.8 +/- 1.1) were blocked by DIM and parity and then randomly assigned to three treatments (12 per treatment) in a 9-week trial. Cows in control, DFM1 and DFM2 were fed TMR diets supplemented with 0, 6 and 12 g of B.similar to subtilis natto solid-state fermentation product per day per cow respectively. Plasma non-esterified fatty acids were lower (p = 0.03) in DFM1 and DFM2 compared with control cows (633 and 639 vs. 685 mu m). Ruminal propionate increased (23.9 vs. 26.3 and 26.9/100 mol, control vs. DFM1 and DFM2 respectively) and acetate decreased (64.2 vs. 62.7 and 62.1/100 mol, control vs. DFM1 and DFM2 respectively) with increasing B.similar to subtilis natto fermentation product supplementation. DMI of the cows in three treatments was not affected by B.similar to subtilis natto fermentation product supplementation, but milk yield was 3.1 and 3.2 kg/day higher for DFM1 and DFM2 than that for control cows on average across the 9-week trial, and significant differences were observed during weeks 59 of the trial, which resulted in 9.5% and 11.7% increase in feed efficiency. B.similar to subtilis natto fermentation product supplementation did not affect milk fat percentage and protein yield but increased (p < 0.05) milk fat yield and lactose percentage (p < 0.01) and tended to decrease protein percentage (p = 0.06). The findings show that B.similar to subtilis natto fermentation product was effective in increasing lactation performance of early lactation dairy cows possibly by altering the rumen fermentation pattern without any negative effects on blood metabolites.

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