Effects of Probiotics on Performance of Late Lactation Dairy Cows

doi:10.3969/j.issn.1000-7091.2012.z1.079

Abstract

Abstract: This study investigated the effect of supplementation with probiotics on performance of late lactationdairy cows． 48 cows with similar Body weight， party， milk production and days in milk ( DIM) were allocated randomly to 4 treatments． Ttreatments consisted of control ( no supplemental probiotics) ， YC ( control diet plus yeast(15 g /d) ) ， LC ( control diet plus lactic acid bacteria (1 g /d) ) ， and NT ( control diet plus bacillus subtilis natto(1 g /d) ) ． The feeding trial lasted for 9 weeks: 2 weeks of diet adaptation and 7 weeks of experimental period． Theresults showed that different probiotics have different effects on milk yield and milk composition． Milk productionwas greater ( P ＜ 0． 05) for late lactation dairy cows supplemented with LC and NT than for those on YC and controltreatments， milk quality was significantly improved by treatments LC and NT． Treatment YC had no effect on Milkproduction and quality were not effected significantly by yeast supplementation． Electrical conductivity was decreasedsignificantly by probiotics supplementation (P ＜ 0． 05) ． Somatic cell counts tended to be decreased (P ＞ 0． 05) ．

Key words: Probiotics, Yeast, Bacillus subtilis natto, Lactic acid bacteria, Dairy cow, Milk performance

CLC Number:

S823.5

HUANG Liang-ce, ZHOU Ling-yun, BU Deng-pan, CHENG Jian-bo, JI Yun. Effects of Probiotics on Performance of Late Lactation Dairy Cows[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(S1): 406-409. doi: 10.3969/j.issn.1000-7091.2012.z1.079.

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