Effects of Different Yeast Cultures on Performance, Nutrient Apparent Digestibility and Serum Indexes of Dairy Cows in Mid-and Late-Lactation

YAN Bichuan, LI Zhenqian, LI Shengli, WANG Yajing, CAO Zhijun, LI Yuanxiao

doi:10.3969/j.issn.1006-267x.2018.07.034

2018 , Vol. 30 >Issue 7: 2732 - 2740

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.07.034

Molecular Nutrition

Effects of Different Yeast Cultures on Performance, Nutrient Apparent Digestibility and Serum Indexes of Dairy Cows in Mid-and Late-Lactation

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1. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China;
2. State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2017-12-25

Online published: 2018-07-20

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Abstract

This experiment was conducted to investigate the effects of different yeast cultures on performance, nutrient apparent digestibility and serum indexes of dairy cows in mid-and late-lactation. Fifty-eight healthy Holstein cows in mid-and late lactation were randomly divided in to 4 groups with 12 replicates per group and 1 cow per replicate based on similar parity, milk yield[(36.49±1.50) kg] and duration of lactation[(175±6) d]. Control group was fed a basal diet supplemented with 500 g/(d·head) tablet corn, test group Ⅰ, test group Ⅱ and test group Ⅲ were fed the basal diet supplemented with 500 g/(d·head) yeast culture 1, 500 g/(d·head) yeast culture 2 and 100 g/(d·head) yeast culture 3, respectively. The test lasted for 45 d, including 15 d for pre-test and 30 d for formal test. The results showed as follows:1) compared with control group, dry matter intake of test group Ⅰ significantly increased by 0.82 kg/d (P<0.05), and milk yield significantly increased by 1.18 kg/d (P<0.05); dry matter intake of test group Ⅱ and test group Ⅲ increased by 0.58 and 0.66 kg/d, respectively, and milk yield increased by 0.79 and 0.65 kg/d, respectively, but the differences were not significant (P>0.05). Compared with control group and test group Ⅱ, milk fat percentage of test group Ⅰ significantly increased by 5.12% and 4.83% (P<0.05), respectively; compare with control group, milk fat percentage of test group Ⅱ and test group Ⅲ increased by 0.26% and 2.70% (P>0.05), respectively. 2) Apparent digestibility of dry matter and neutral detergent fiber of test group Ⅰ were significantly increased by 5.47% and 3.05% than those of control group (P<0.05); apparent digestibility of dry matter and neutral detergent fiber of test group Ⅱ and test group Ⅲincreased by 3.71% and 1.84%, 1.36% and 0.96% than those of control group, but the differences were not significant (P>0.05). 3) Serum globulin content of test group Ⅰ and test group Ⅲ on day 0 was significantly higher than that of control group(P<0.05); serum globulin content of test group Ⅲ on day 15 and whole period average value were significantly higher than those of control group(P<0.05). 4) Compared with control group, serum malondialdehyde (MDA) content of test group Ⅰ on day 30 and whole period average value were significantly lower (P<0.05); serum glutathione peroxidase activity of test group Ⅰ on day 15 and whole period average value were significantly higher than those of control group (P<0.05). 5) Compared with control group, gross profit of test group Ⅰ increased by 2.14 RMB/(d·head), while other groups decreased. In conclusion, diet supplemented with yeast culture can improve performance and nutrient apparent digestibility, not negatively affects serum biochemical indexes, enhance serum antioxidant capacity, and improve economic efficiency; the effects of 500 g/(d·head) yeast culture 1 are the best.

Key words： yeast culture; lactating dairy cow; performance; apparent digestibility; serum index; antioxidant index

Cite this article

YAN Bichuan, LI Zhenqian, LI Shengli, WANG Yajing, CAO Zhijun, LI Yuanxiao . Effects of Different Yeast Cultures on Performance, Nutrient Apparent Digestibility and Serum Indexes of Dairy Cows in Mid-and Late-Lactation[J]. Chinese Journal of Animal Nutrition, 2018 , 30(7) : 2732 -2740 . DOI: 10.3969/j.issn.1006-267x.2018.07.034

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