Effects of Rumen-Protected Choline on Performance and Fat Metabolism of Periparturient Dairy Cows

LIU Xiang; QU Yongli; LIU Licheng; WANG Yang; TAO Chunwei

doi:10.3969/j.issn.1006-267x.2014.03.017

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 3: 675 - 682

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.03.017

Ruminant Nutrition

Effects of Rumen-Protected Choline on Performance and Fat Metabolism of Periparturient Dairy Cows

LIU Xiang ,
QU Yongli ,
LIU Licheng ,
WANG Yang ,
TAO Chunwei

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1. College of Animal Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
2. Institute of Animal Husbandry and Veterinary, Heilongjiang Agricultural Science Academy, Harbin 150030, China;
3. Beijing Yahe Nutrition Technology Co., Ltd., Beijing 100085, China

Received date: 2013-10-12

Online published: 2014-03-04

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Abstract

The aim of this study was to investigate the effects of rumen-protected choline (RPC) on performance and fat metabolism of periparturient dairy cows. Sixty Holstein cows with similar parity, age, milk yield of the last parity and expected parturition date were randomly assigned to three groups with twenty cows in each group. Cows in different groups were fed a basal diet supplemented with 0, 20 and 30 g/d RPC, respectively. The experiment lasted for 74 days, which was from 14 days before parturition to 60 days after parturition. The results showed as follows: 1) dietary supplementation of RPC at 20 and 30 g/d significantly increased milk yield of cows at 45 and 60 days after parturition (P<0.05 or P<0.01); dietary supplementation of RPC at 30 g/d significantly increased the percentages of milk fat, milk protein, lactose and milk total solids at some time points after parturition (P<0.05 or P<0.01). 2) Dietary supplementation of RPC at 20 and 30 g/d significantly increased the concentrations of glucose, low density lipoprotein, triglyceride and total amino acids in plasma (P<0.05 or P<0.01), but significantly decreased the concentrations of non-esterified fatty acid, β-hydroxybutyrate and total cholesterol in plasma of cows at some time points after parturition (P<0.05 or P<0.01). 3) Dietary supplementation of RPC at 20 and 30 g/d significantly increased plasma insulin concentration (P<0.05 or P<0.01), but significantly decreased the concentrations of glucagon and leptin in plasma of cows at some time points after parturition (P<0.05 or P<0.01). In conclusion, dietary supplementation of RPC can alleviate negative energy balance, regulate fat metabolism, improve the performance of periparturient dairy cows, and the optimal supplemental level of RPC for periparturient dairy cows is 30 g/d.

Key words： periparturient dairy cow; rumen-protected choline; performance; fat metabolism

Cite this article

LIU Xiang , QU Yongli , LIU Licheng , WANG Yang , TAO Chunwei . Effects of Rumen-Protected Choline on Performance and Fat Metabolism of Periparturient Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2014 , 26(3) : 675 -682 . DOI: 10.3969/j.issn.1006-267x.2014.03.017

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