China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (3): 901-915.doi: 10.16431/j.cnki.1671-7236.2021.03.014

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Cysteamine on the Lactation Performance,Antioxidant Performance and Rumen Microbial Diversity of Buffalo in Summer

ZHANG Huihui1,2, LI Mengwei1, TANG Zhenhua1, LIANG Xin1, PENG Lijuan1, PENG Kaiping1, YANG Chengjian1, WANG Xinfeng2   

  1. 1. Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs(Guangxi), Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China;
    2. College of Animal Science and Technology, Shihezi University, Shihezi 832000, China
  • Received:2020-09-19 Online:2021-03-20 Published:2021-03-18

Abstract: The purpose of this experiment was to study the effect of adding cysteamine to the buffalo diet on the lactation performance,rumen fermentation parameters,antioxidant performance,and rumen microbial diversity of the buffalo.Twenty healthy Nili-Ravi buffaloes with similar body weight (615 kg±21 kg),parity (3~5 births) and milk production (6 kg/d±1 kg/d) were selected and divided into 4 groups with 5 buffalo in each group as a single-factor randomized block design.0 (control group),15,30 and 45 g/d cysteamine was added to the diet,respectively.The pre-feeding period was 1 week and the test period was 4 weeks.The results showed that:Compared with the control group,① Adding cysteamine had no significant effect on buffalo body surface temperature,rectal temperature and respiratory rate (P>0.05).② The addition of 30 and 45 g/d cysteamine in the diet significantly increased the DMI and the apparent digestibility of ADF (P<0.05).③ The addition of cysteamine in the diet could significantly increase the milk production of buffalo,4% milk fat corrected milk production,milk protein rate,total milk solids and the milk non-fat solids content (P<0.05).④ Dietary supplementation with 45 g/d cysteamine significantly increases the buffalo rumen MCP content (P<0.05).Dietary supplementation with cysteamine had no significant effect on the number of bacteria and fungi in rumen fluid of buffalo (P>0.05).Adding 15 g/d cysteamine significantly reduced the number of protozoa (P<0.05).When the dosage of cysteamine was 30 g/d,the number of rumen fluid protozoa was significantly increased (P<0.05).⑤ The addition of cysteamine in the diet significantly reduced the content of C14:1n5,C18:3n6 in milk and significantly increased the content of C18:1n9t,C19:0,C20:3n6 in milk (P<0.05).Adding 30 g/d cysteamine to the diet significantly reduced the content of C16:0,C18:0 and SFA in milk (P<0.05).Dietary supplementation of 30 and 45 g/d cysteamine significantly reduced the content of C20:4n6 (ARA) and UFA in milk (P<0.05).⑥ The buffalo serum T-AOC in cysteamine groups were significantly higher (P<0.05);MDA in the diet supplemented with 15 and 30 g/d cysteamine group was significantly lower than the control group (P<0.05);GSH-Px,total protein and globulin in the 30 and 45 g/d cysteamine group was significantly increased compared with the control group (P<0.05);Cor of the 15 and 45 g/d cysteamine group was significantly lower than that of the control group (P<0.05).The activity of AST in the 30 g/d cysteamine group was significantly increased compared with the control group (P<0.05).In conclusion,the addition of cysteamine in the diet could improve the lactation performance and antioxidant capacity of the buffalo in the mid-lactation period,and affect the rumen fermentation,milk fat fatty acid content and the number of rumen protozoan in the buffalo.Under the conditions of this experiment,the recommended amount of cysteamine added to the diet was 30 g/d.

Key words: cysteamine; buffalo; lactation performance; antioxidant performance; microbial diversity

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