高产荷斯坦奶牛泌乳曲线的特征及相关分析  

The Character and Correlation Analysis on Lactation Curve of High-Yield Holstein Cows

作　　者：程郁昕[1] 陈宏权[2] 王治华[1] 许春香[3] 

机构地区：[1]安徽技术师范学院动物科学系,安徽凤阳233100 [2]安徽农业大学畜牧水产学院,安徽合肥230036 [3]安徽淮南乳品公司奶牛三场,安徽淮南232000

出　　处：《黄牛杂志》2003年第1期19-21,共3页Journal of Yellow Cattle Science

基　　金：安徽省教育厅自然科学基金项目 (2 0 0 0 JL 0 5 7)资助

摘　　要：选取 2 85胎次第三、四胎 30 5 d产奶量超过 80 0 0 kg的安徽荷斯坦牛的泌乳资料 ,利用Wood模型 ( Yt=atb-cte )进行高产荷斯坦奶牛泌乳曲线特征及相关的分析。结果表明 :按照达到泌乳高峰周时间的不同对选取奶牛进行分组 ,1 1组 Wood模型拟合泌乳曲线的平均拟合精度 ( R2 )为0 .939(幅度为 0 .899- 0 .962 )。随着达到泌乳高峰周时间的推迟 ,规模因子 a具有逐渐降低的趋势 ;而产奶量上升率 b、产奶量下降因子 c、泌乳持久力表现与 a相反的变化趋势。在相关分析中 ,MY(实际产奶量 )与 EMY(估计产奶量 )、PY(高峰月产奶量 )为强正相关 ,r(相关系数 )分别为 0 .999和0 .776,与持久力为中等正相关 ( r=0 .379) ,与 a、b、c的相关程度较弱 ;持久力与 MY、EMY均为中等正相关 ,r分别为 0 .379及 0 .382 ,与 b、a、c的 r分别是 0 .90 5、- 0 .875、0 .731 ,与 PY的相关程度较弱 ( r =- 0 .1 40 )。The lactation period records of 285 parities of Anhui Holstein cows whose 305 day milk yield (the third parity and the fourth parity) were beyond 8000kg were selected to characteristically and correlatively analysis lactation curve of high producing Holsteins based on Wood model (Yt =atbe ct). The results showed that the average fitting accuracy (R2) of lactation curve was 0.939(the range was 0.889~\{0.962\}) based on Wood model. With the postponement of attaining peak week of lactation, parameter a went down gradually; parameters b and c and lactation persistency went up little by little. The correlation analysis showed that milk yield (MY) had high positive correlation with estimated milk yield (EMY) and peak yield (PY), correlation coefficient (r) was 0.999 and 0.776 respectively; had medium positive correlation with persistency (r=0.379); and had low correlation with parameters a, b, c respectively. Persistency had medium positive correlation with MY (r=0.379) and EMY (r=0.382); had high correlation with parameters b (r=0.905), a (r=-0.875) and c (r=0.731) respectively; and had low negative correlation with PY (r =-0.140).

关 键 词：荷斯坦奶牛 WOOD模型 泌乳曲线 特征分析 相关分析 数学模型 

分 类 号：S823.91[农业科学—畜牧学]