China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (5): 1373-1383.doi: 10.16431/j.cnki.1671-7236.2020.05.010

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Different Levels of Chromium Niacin on Lactation Performance, Antioxidant Activity and Ruminal Microbial Diversity in Buffalo Under Heat Stress

ZHANG Huihui1,2, LI Mengwei2, TANG Zhenhua2, LIANG Xin2, PENG Lijuan2, PENG Kaiping2, YANG Chengjian2, WANG Xinfeng1   

  1. 1. College of Animal Science and Technology, Shihezi University, Shihezi 832000, China;
    2. Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology(Guangxi), Ministry of Agriculture and Rural Affairs, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
  • Online:2020-05-20 Published:2020-05-18

Abstract: The purpose of this study was to investigate the effects of different levels of chromium niacin on the lactation performance,antioxidant performance and microbial diversity of rumen fermentation in buffalo under heat stress.In this experiment,20 healthy mid-lactating Nili-Ravi buffaloes were selected according to their body weight,daily age,gestational number and milk yield.A single factor randomized block design was adopted,and all the buffloes were divided into 4 groups (Ⅰ,Ⅱ,Ⅲ,Ⅳ groups) with 5 replicates for each group.Each bufflo in control group was fed a basic diet.Each buffalo in group Ⅰ,Ⅱ,Ⅲ and Ⅳ was fed with 0,1.5,3.0 and 4.5 mg chromium niacin per day,respectively.The experimental pre-feeding period was 1 week,and the experimental period was 4 weeks.The experiment results showed that:①Under the condition of heat stress,there was no significant difference in dietary supplementation of different levels of chromium niacin on dry matter intake (P>0.05),and the apparent digestibility of ADF and NDF in the test groups increased to different degrees.②There was no significant effect on the rumen pH and volatile fatty acids such as acetic acid,propionic acid and butyric acid.③Dietary addition of 3.0 mg/d chromium niacin significantly increased milk yield (P<0.05).There was no significant difference in milk protein rate,milk fat rate,milk total solid and non-fat solid among the groups (P>0.05).④The levels of CAT,MDA and GSH-Px in buffalo were not significant (P>0.05) among test groups and the control group.Compared with the control group,the concentrations of T3 and T4 in 3.0 mg/d chromium niacin group were significantly higher than those in the control group (P<0.05).⑤Compared with the control group,the content of fatty acids in long chain milk fat of buffalo in the experimental group was increased.⑥At the phylum level,the dominant flora of each group of water buffalo was Firmicutes and Proteobacteria of Bacteroidetes,and the samples showed rich diversity on the whole.The addition of 3.0 mg/d chromium to the diet could improve the lactation performance and the anti-oxidation performance of the buffalo,and the effect was better than that of other groups.

Key words: nicotinic acid chromium; lactating buffalo; rumen fermentation; oxidation resistance; fatty acid; microbial diversity

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