胎次与产仔数对广东小耳花猪初生仔猪均匀度的影响

Research of Piglets Uniformity in Guangdong Small Ear Spotted Pig

初生仔猪均匀度常用窝初生个体均重的标准偏差及变异系数表示,是反映母猪孕期繁殖效率的重要指标之一。为了研究不同胎次及产仔数对初生仔猪均匀度的影响,研究对1011窝广东小耳花猪的历史分娩数据进行分析。结果表明:窝初生个体均重为0.67 kg,窝初生个体均重的标准偏差为0.13 kg,窝初生个体均重的变异系数为19%;窝初生个体均重与窝初生个体均重标准偏差的相关系数是0.296,呈极显著正相关(P约0.01);窝初生个体均重变异系数与总产仔数的相关系数是0.028,与产活仔数的相关系数为0.024,均呈现弱正相关。研究建议在地方猪开发利用中,合理调整群体胎龄结构,改善饲养管理方式,合理调整孕期母猪营养水平,进一步提高群体初生仔猪均匀度。

The uniformity of newborn piglets refers to the difference in birth weight of newborn piglets in the same litter.The standard deviation and coefficient of variation of the average weight of the newborn in the litter are one of the important indicators reflecting the reproductive efficiency of the sow during pregnancy.This study analyzed the delivery data of 1011 litter of Guangdong small-eared pigs.The results showed that the average birth weight in the litter was 0.67 kg,the standard deviation of the average birth weight in the litter was 0.13 kg,and the average birth weight coefficient in the litter was 0.19.The correlation coefficient between the average birth weight in the litter and the average birth weight in the litter was 0.296.The mean primary weight coefficient of variation and total litter size in the litter.The correlation coefficient is 0.028,and the correlation coefficient with the number of live pigs is 0.024,which shows a weak positive correlation.The results of this study showed that the parity,average birth weight,total litter size,and live litter size all had certain effects on the uniformity of newborn piglets.In production practice,the gestational age structure should be adjusted reasonably to improve feeding management.Ways to rationally adjust the nutritional level of sows during pregnancy and further improve the uniformity of newborn piglets.