摘要
对长白母猪两年 5 33胎次 4个繁殖性能指标与主要气候因子 (月平均气温和相对湿度 )的相关和曲线回归分析表明 ,母猪受胎率与月平均气温、相对湿度存在着显著的负相关关系 ( - 0 .5 0 5 ,- 0 .49,P<0 .0 5 ) ,且母猪的受胎率与月平均气温之间的相关性与相对湿度有关 ;月平均气温与窝产仔数、2 1日龄窝重呈负相关 ( - 0 .387,- 0 .363) ,而与仔猪的成活率呈正相关 ( 0 .35 2 ) ,但它们之间的相关关系均不显著 ( P>0 .0 5 ) ;母猪的受胎率与月平均气温之间存在着显著的曲线回归关系 ( P<0 .0 5 ) ,而与相对湿度的曲线回归方程无意义 ;母猪的窝产仔数、仔猪的成活率和 2 1日龄窝重与月平均气温和相对湿度之间的曲线回归关系不显著( P>0 .0 5 )。在气温为 2 .4～ 36.6℃ ,相对湿度为 61 %～ 89%的范围内 ,母猪的受胎率与月平均气温之间的回归方程为 :Y=1 1 8.635 e-0 .0 173
The effects of the climatic factors(month average temperature and relative humidity) on a few reproductive performance of 553 sows including pregnancy rate, litter size, 21 d weaning weight and survival rate of piglets, were studied with the methods of correlation and curve regression The results showed that there were significant correlation between pregnancy rate and climatic factors (-0 505, -0 409, P <0 05), there were moderate or minor correlation among other reproductive parameters and climatic factors ( P >0 05); There were significant curve regression between pregnancy rate and month average temperature ( P <0 05), keeping to the exponential model: Y=118 635e -0.0173x In the range of 2 4～36 6℃ temperature and 61%～89% relative humidity, with every degree of increase in temperature for sows, pregnancy rate was 0 98(e -0 0173 ) times as much as former(original value) according to the exponential model
出处
《家畜生态》
2002年第2期7-10,共4页
Ecology of Domestic Animal
关键词
气候因子
母猪
繁殖性能
相关性
climatic factors
sows
reproductive performance
