A New Type of Additive with Selenium and Rumen-Protected Choline: Effects on Production Performance and Health Condition of Dairy Cows in Transition Period

YE Gengping, ZHANG Xiaofeng, WANG Wendan, LIU Guanglei, SU Yanjing, TANG Xinren

doi:10.3969/j.issn.1006-267x.2018.03.032

2018 , Vol. 30 >Issue 3: 1073 - 1083

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.03.032

Molecular Nutrition

A New Type of Additive with Selenium and Rumen-Protected Choline: Effects on Production Performance and Health Condition of Dairy Cows in Transition Period

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Bright Farming Co., Ltd., Shanghai 200436, China

Received date: 2017-09-19

Online published: 2018-03-05

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Abstract

The aim of this study was to investigate the effects of a new type of additive with selenium and rumen-protected choline on production performance and health condition of dairy cows in transition period. Ninety-six Holstein dairy cows were randomly divided into four groups according to parity, body condition score, total milk yield of the last lactation period and expected date of confinement, which were control group, low dose (LD) group, medium dose (MD) group, and high dose (HD) group, respectively. Each group had 24 cows. Four groups of dairy cows were supplemented with 0, 40, 80 and 120 g/(head·d) the new type of additive with selenium and rumen-protected choline (rumen-protected choline content ≥ 95%, and selenium content ≥ 0.2%), respectively. The pre-test was from day 21 to 15 prepartum, and the test was from day 15 prepartum to day 28 postpartum. Dry matter intake (DMI), plasma biochemical indexes, and antioxidant indexes, mRNA relative expression levels of key antioxidant proteins and lipid transportation proteins in liver were determined. The results showed as follows:1) DMI, body weight change, body condition score change and delivery coefficient score of dairy cows were not significantly different among groups (P>0.05). 2) Dietary supplementation of the new type of additive with selenium and rumen-protected choline had no significant effects on lactation performance, but milk yield of MD group and HD group were 1.8 and 1.6 kg/d higher than that in control group, respectively. 3) At postpartum period, plasma triglyceride (TG) content, aspartate aminotransferase (AST) activity and alanine aminotransferase (ALT) activity in MD group and HD group were significantly lower than those in control group and LD group (P<0.05). 4) Selenium content in plasma, liver tissue and milk was significantly higher in MD group and HD group than in control group (P<0.05). 5) Compared with control group and LD group, TG content in liver tissue of MD group and HD group was significantly lower (P<0.05). 6) Total antioxidant capacity (T-AOC), and the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in liver tissue of MD group and HD group were significantly higher than those of control group and LD group (P<0.05), while contents of malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) were significantly lower than those of control group and LD group (P<0.05). 7) Compared with control group, the mRNA relative expression levels of cell type glutathione peroxidase (GPx1), microsomal triglyceride transporter (MTTP), and apolipoprotein B100 (ApoB100) in liver tissue of experimental groups were significantly increased (P<0.05), while there was no significant effects on phospholipid glutathione peroxidase (GPx4) mRNA relative expression level in liver tissue (P>0.05). The results indicate that the new type of additive with selenium and rumen-protected choline tends to increase milk yield, can effectively protected liver function, and the optimal supplemental level is 80 g/(head·d).

Key words： rumen-protected choline; selenium; new type of additive; transition dairy cows; production performance; triglyceride

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YE Gengping, ZHANG Xiaofeng, WANG Wendan, LIU Guanglei, SU Yanjing, TANG Xinren . A New Type of Additive with Selenium and Rumen-Protected Choline: Effects on Production Performance and Health Condition of Dairy Cows in Transition Period[J]. Chinese Journal of Animal Nutrition, 2018 , 30(3) : 1073 -1083 . DOI: 10.3969/j.issn.1006-267x.2018.03.032

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