China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (9): 3323-3331.doi: 10.16431/j.cnki.1671-7236.2021.09.023

• Genetics and Breeding • Previous Articles     Next Articles

Analysis of Population Characteristics and Influencing Factors of Rest Time in Holstein Dairy Cows

MA Longgang1,2, AN Tao1,2, ZHANG Hailiang2, ZHU Lei1,2, WANG Lei1,2, NING Jingyang2, WANG Yan3, GUO Gang3, HUANG Xixia1, WANG Yachun2   

  1. 1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Key Laboratory of Animal Genetics, Breeding and Reproduction(MARA), National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    3. Beijing Sunlon Livestock Development Co., Ltd., Beijing 100176, China
  • Received:2021-03-23 Online:2021-09-20 Published:2021-09-17

Abstract: In order to explore the population characteristics and influencing factors of rest time in Holstein dairy cows in Beijing, the rest time records in 838 Holstein dairy cows from a large-scale farm, and the corresponding dairy herd improvement records, environmental temperature and humidity, management records were collected from April 2018 to April 2020. The GLM procedure in SAS 9.2 software was used to analyze the impacts of year, season, herd, parity and lactation month on rest time in Holstein dairy cows. The relationship between production performance and rest time was also analyzed. The results showed that the average rest time in Holstein dairy cows was 397.39 min/d, ranging from 87.74 to 707.03 min/d, and the coefficient of variation was 26%. The rest time firstly decreased and then increased with change of season, with the lowest in summer and the highest in winter, and it gradually decreased with the increase of environmental temperature and humidity index. The rest time in dairy cows reached a peak high level when they calved or suffered from health events, and then it gradually decreased to base levels. Measuring year, season, herd, parity and lactation month had extremely significant impacts on rest time (P<0.01). The milk production showed a decrease trend with the increase of rest time in Holstein dairy cows. This study provided a theoretical basis for the use of automatic recording equipment to explore the behavior of dairy cows and the use of continuously measured rest time data to improve the accurate management level of dairy cows.

Key words: Holstein dairy cows; rest time; calving; disease

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