新疆褐牛淘汰原因及其与泌乳天数关系分析

牛只的淘汰是牛场管理的重要组成部分。为了探讨新疆褐牛淘汰原因及其与泌乳天数的关系,本研究收集新疆某牛场新疆褐牛2009-2019年间的离群记录,利用SAS 8.1软件分析不同淘汰原因对泌乳天数的影响。结果表明,乳房类疾病和繁殖类疾病是造成新疆褐牛淘汰的主要原因,不同淘汰原因对新疆褐牛淘汰时泌乳天数有极显著的影响(P<0.01),并发现新疆褐牛在泌乳阶段大于360d时,由于各类疾病而淘汰的比例比其他泌乳阶段淘汰比例高。本研究对新疆褐牛淘汰原因及不同淘汰原因对泌乳天数的影响进行分析,为牛场提高饲养管理水平,提高经济效益提供参考。

Analysis of the Relationship between the Reasons for Culling Xinjiang Brown Cattle and the Number of Milking Days

The elimination of cattle is an important part of cattle farm management.In order to explore the influence of the culling reasons on the number of milking days in Xinjiang brown cattle,this study collected the outlier records of Xinjiang brown cattle in a cattle farm in Xinjiang from 2009 to 2019,and used SAS 8.1 software to analyze the impact of different culling reasons on the number of milking days.The results showed that udder diseases and reproductive diseases were the main reasons for the culling of Xinjiang brown cattle,and different culling reasons had a very significant impact on the number of days of milking during the culling of Xinjiang brown cattle(P<0.01),and it was found that Xinjiang brown cattle were in the lactation stage When it is greater than 360 days,the proportion of elimination due to various diseases is higher than that of other lactation stages.This study analyzes the reasons for the elimination of Xinjiang brown cattle and their effects on the number of days of milking during the elimination,and provides a reference for the cattle farm to improve the level of feeding and management and improve economic benefits.