不同胎次、配种季节、分娩季节对宁乡猪母猪繁殖性能的影响

Effect of Different Parities,Breeding Seasons and Delivery Seasons on Reproductive Performance of Ningxiang Sows

为了研究胎次、配种季节和分娩季节对宁乡猪繁殖性能的影响,试验选取1~16胎次宁乡猪母猪3259窝的生产资料,分析了不同胎次、配种季节、分娩季节对宁乡猪总产仔数、活仔数、育成率、个体重、窝重等繁殖性状的影响。结果表明,胎次、配种季节、分娩季节对宁乡猪母猪繁殖性能均有显著影响(P<0.05)。不同胎次母猪产仔性能表现为先增加再稳定后逐步降低的趋势,初生活仔数、21日龄和35日龄活仔数均以第7胎次最高、第16胎次最低,组间差异显著(P<0.05);第3、4、5胎次初生窝重分别为9.32 kg、9.42 kg、9.40 kg,显著高于第1、13、16胎次;第9、10胎次21日龄窝重分别为33.42 kg、33.17 kg,显著高于第1~5、13、15、16胎次(P<0.05),表明宁乡猪母猪3~9胎次为整个生产胎次的黄金时期。冬季配种组的初生活仔数、21日龄活仔数、35日龄活仔数、21日龄个体重、35日龄个体重、初生窝重、21日龄窝重、35日龄窝重分别为9.45头、8.97头、8.91头、3.44 kg、6.16 kg、9.10 kg、30.59 kg、54.88 kg,显著高于春、夏、秋季配种组(P<0.05);春季分娩组的35日龄活仔数、21日龄个体重、35日龄个体重、21日龄窝重、35日龄窝重8.79头、3.44 kg、6.02 kg、30.52 kg、52.92 kg,显著高于其他3组(P<0.05),表明冬配春生的母猪会表现出相对更好的繁殖性能。

The aim of this study was to analyze the effect of parities,breeding seasons and delivery seasons for the reproductive performance of Ningxiang Sows.A total of 3259 reproductive records of Ningxiang sows with 1-16 parities were used in this study.Effects of parities,breeding seasons and delivery seasons to the reproductive performance including total litter size,live births,rearing rate,body weight,litter weight were tested.The data showed that the parities,breeding seasons and delivery seasons all have significant effect on the reproductive performance of Ningxiang sows(P<0.05).The farrowing performance with 1-16 parities sows exhibit a tendency to increase first,then stabilize,then gradually decrease.The number of starting live births,21-day-old live births and 35-day-old live births were the highest at the 7th parity and the lowest at the 16th parity,and the difference between groups was significant(P<0.05).The starting litter weight of the 3rd,4th and 5th parities was 9.32 kg,9.42 kg and 9.40 kg respectively,which was significantly higher than that of the 1st,13th and 16th parities(P<0.05).The 21-day-old litter weight for the 9th and 10th parities was 33.42 kg and 33.17 kg respectively,which was significantly higher than that of the 1st,2nd,3rd,4th,5th,13th,15th and 16th parities(P<0.05).That showed the golden period of reproductive performance of Ningxiang sows is 3rd to 9thparities.The number of starting live births,21-day-old live births,35-day-old live births,21-day-old body weight,35-day-old body weight,starting litter weight,21-day-old litter weight and 35-day-old litter weight in winter breeding group was 9.45,8.97,8.91,3.44 kg,6.16 kg,9.10 kg,30.59 kg,54.88 kg,which significantly higher than those of the spring,summer and autumn breeding groups(P<0.05).The number of 35-day-old live births,21-day-old body weight,35-day-old body weight,21-day-old litter weight and 35-day-old litter weight in spring delivery group was 8.79,3.44 kg,6.02 kg,30.52 kg,52.92 kg,which significantly higher than those of the summer,autumn and winter delivery groups(P<0.05).That showed Ningxiang sows which were bred in winter and delivered in spring had relatively better reproductive performance.