通过对云南省2011—2020年奶牛生产性能测定（DHI）数据进行汇总整理分析,结果发现,DHI测定取得了显著成效。2011—2020年参测奶牛的产奶量、乳成分、体细胞数、产犊间隔等指标都得到了显著改善。与2011年相比,2020年奶牛日均产奶量提高了86.67%,乳脂率增加了0.63 个百分点,乳蛋白率增加了0.12 个百分点,总固体增加了0.23 个百分点,体细胞数降低了68.91%,产犊间隔下降了50.58 天。

This paper summarized and analyzed the data of Dairy Herd Improvement (DHI) in Yunnan Province from 2011 to 2020,and it was found that the DHI measurement has achieved remarkable results.From 2011 to 2020, milk yield,milk composition,somatic cells,calving interval and other indexes of reference cows were significantly improved.Compared with 2011,in 2020,the average daily milk yield,milk fat percentage,milk protein percentage and total solids of dairy cows increased by 86.67%,0.63 percentage points,0.12 percentage points,0.23 percentage points, somatic cell number decreased by 68.91% and calving interval decreased by 50.58 days.