China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (3): 822-827.doi: 10.16431/j.cnki.1671-7236.2020.03.021

• Genetics and Breeding • Previous Articles     Next Articles

Effect of Non-Genetic Factors on Population Life of Holstein Dairy Cows in Xinjiang

ZHAO Fanfan1, WANG Dan1, MA Yanjun2, MA Xinbing2, GE Jianjun2, ZHANG Xiaoxue1, ZHANG Menghua1, XU Lei1, JIANG Hui1, SANG Zhagen1, HUANG Xixia1   

  1. 1. School of Animal Sciences, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Xinjiang Hutubi Cattle Farm, Changji 831100, China
  • Received:2019-09-04 Online:2020-03-20 Published:2020-03-17

Abstract: In order to explore the influence of various factors on the life span of Holstein dairy cows and understand the utilization of dairy cows,the outlier and performance data of 4 057 Holstein dairy cows in large-scale cattle farms in Changji area of Xinjiang from 2011 to 2018 were collected in this study.The effects of field,year,season and cull type on the stray parity and herd life in Holstein cattle were analyzed by SAS 9.2 software,and the least square and multiple comparative analysis were carried out.The results showed that both the year and the type of cull had a extremely significant effect on the number of stray parity and the herd life in the group (P<0.01),and the effect of the field and the season of strays on the number of stray parity and the herd life in the group was not significant (P>0.05).With the increase of stray years,the number of extraneous fetuses decreased first,then increased and then decreased.The number of stray parity in 2016 was the highest (3.222 births),which was higher than that in other years (P<0.01);The number of the stray parity was the lowest in 2018,and it was extremely significantly lower than that of the other years (P<0.01);In 2015,the herd life in the group was higher than that of other years.In 2018,the herd life in the group was the lowest,and it was 1 890.692 days,and was extremely significantly lower than that of other years (P<0.01);According to the seasons,the stray parity in spring was lower than that in other seasons,and the herd life in the group was lower than that in autumn and winter (P<0.01;P<0.05).The stray parity and herd life in-group days in the cull type of limb-hoof disease was extremely significantly higher than other kinds of diseases (P<0.01),and the breast disease was extremely significantly lower than other kinds of diseases (P<0.01).Therefore,by analyzing the influence of various factors on the stray parity and herd life in-group days,it could provide a theoretical basis for the daily management of dairy cows in large-scale pastures,so as to improve the comprehensive use efficiency of dairy cows and prolong their life.

Key words: stray parity; herd life; analysis of influencing factors; Holstein cattle

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