摘要
为探究牧场用宾州筛检测TMR品质的数据与乳脂率存在何种关系,笔者结合牧场TMR日调配过程的实践,对某牧场2组高产泌乳群的TMR饲喂数据和乳脂数据进行分析研究。结果表明,TMR日粮宾州筛测量的各层变异系数在7%~20%。结合样本舍乳脂率回归后得知:宾州筛1层占比与乳脂率影响差异显著(P<0.05)。尝试回归前2层之和占比乳脂率影响差异显著(P<0.05)。试验中发现,该牧场对日粮添加量的准确性存在问题,对TMR日粮中各原料实际添加量与配方目标值的变异系数除青贮和酒糟外均在5%以上。上述结果证实了该牧场乳脂率异常波动存在管理原因。
In order to explore the relationship between the data of tmr quality detected by pennsylvania screen and milk fat rate,Practice of daily allocation process in combination with pasture tmr,Analysis of tmr feeding data and milk fat data of two groups of high-yield lactating groups in a pasture.The results of the tmr feeding data of two groups of high-yield lactating groups in a pasture showed that the coefficient of variation of each layer measured by the Pennsylvania sieve of the TMR diet was 7%~20% and the analysis of milk fat data,When combining the regression of the milk fat rate of the sample house,we found that the proportion of the first layer of Pennsylvania sieve and the milk fat rate had a significant difference(P<0.05).The influence of the sum of the first two layers on the percentage of milk fat was significant(P<0.05).In the experiment,it was found that there was a problem with the accuracy of the amount added to the diet in this ranch,and the coefficient of variation of the actual amount added to the TMR diet and the target value of the formula was more than 5%,except for silage and distiller’s grains.The above results confirmed that there was a management reason for the abnormal fluctuation of the milk fat rate in this ranch.
作者
杨菊凤
田慧丽
李朝云
庹世友
何孟莲
YANG Ju-feng;TIAN Hui-li;LI Chao-yun;TUO Shi-you;HE Meng-lian(Shandong Vocational College of Animal Husbandry and Veterinary Medicine,Shandong Weifang 261061,China;Kashgar Animal Husbandry and Veterinary Bureau,Xinjiang,Kashgar,844500,China)
出处
《当代畜牧》
2022年第12期50-54,共5页
Contemporary Animal Husbandry
