摘要
本文对西安草滩农场第四奶牛场 66头奶牛的第一泌乳期完整的原始资料进行分析 ,利用最高月产奶量、90 d奶量、高峰日、乳脂率等泌乳前期产奶指标对 30 5 d奶量进行相关分析 ,结果表明高峰日、最高月产奶量、90 d奶量与 30 5 d奶量分别呈强正相关 ,相关系数显著性检验均达到显著或极显著的程度 ,分别为 0 .367( P<0 .0 1 )、0 .41 1 ( P<0 .0 1 )和 0 .2 62 ( P<0 .0 5 ) ;乳汁率与 30 5 d奶量呈弱负相关 ,相关系数为 - 0 .2 5 5 ,达到显著程度 ( P<0 .0 5 )。本文分析的奶牛几项泌乳前期产奶指标与 30 5 d产奶量的关系密切 ,为奶牛的早期选育工作提供了实际依据。
Data for this study were collected from 66 dairy cattle in the first milk period in Fourth Dairy Cattle Farm of Caotan Farm of Xian City. The early milk characters that are milk fat percentage (X 1) , milk peak day (X 2) , maximum daily yield (X 3) , 90 days yield (X 4) and 305 day yield (Y) were measured. The results showed that correlation coefficients between the early characters and the 305 days yield were 0.367( P <0.01), 0.411( P <0.01) , 0.262( P <0.05) and 0.255 ( P <0.05) respectively. These early milk characters have close relationship with 305 day yield, which can be applied for the early selection and breeding of dairy cattle.
出处
《黄牛杂志》
2002年第4期11-15,共5页
Journal of Yellow Cattle Science
基金
西北农林科技大学青年基金资助项目
关键词
前期泌乳性能
奶牛
产奶量
相关分析
Dairy cattle
Earlier stage milk characters
Milk yield
Correlation analysis
