基于DHI数据对奶牛部分生产性状的影响因素分析

Analysis on the Influencing Factors of Some Milk Production Traits of Dairy Cows Based on DHI Measurement Data

依据宁夏地区奶牛场日常管理及饲养状况,从DHI参测场中选择15个奶牛场为调查分析对象,收集了2013-2016年泌乳牛的400 701条DHI数据,剔除异常指标,运用SAS 9.0软件中的一般线性模型,分析了宁夏地区牛群产奶性状、乳脂率和乳蛋白率的影响因素。结果表明,不同牛场、不同测定年份、不同产犊季节及不同胎次对奶牛产奶量、乳脂率和乳蛋白率都有一定的影响。该结果为宁夏地区奶牛场更科学有效的管理提供建设性意见,从而帮助牛场提高奶牛群体整体质量,获得更高的生产效率和经济效益。

Based on the daily management and feeding status of dairy farms in Ningxia, totally 15 dairy farms were selected from the DHI test sites as the survey and analysis objects, a total of 400701 DHI data of lactating cows from 2013 to 2016 were collected, and the abnormal indicatorse were liminated. The general linear model in SAS 9.0 software was used to analyze the influencing factors of some milk production traits of dairy cows in Ningxia. Results showed that differernt herd, year, calving season and parity had effects on milk yield, milk fat rate and milk protein rate. It provided constructive suggestions for more scientific and effective management of dairy farms in Ningxia.