出生季节和胎次对猪生长和繁殖性能的影响

Effects of birth season and parity on growth and reproductive performances of pigs

旨在探究种猪出生季节、胎次对其生长性能和繁殖性能的影响、以及分娩季节和胎次对母猪繁殖性能的影响。采用多因素方差分析对不同季节和胎次出生的大白、长白母猪的生长和繁殖性状的表型数据进行分析。结果:出生季节、胎次对种猪生长性能均有显著影响(P<0.05),春、秋季出生的种猪生长发育速度高于其他季节,1~4胎出生的种猪生长性能呈增加趋势,第4胎达到高峰,第4胎以后出生的种猪生长性能逐渐下降;出生季节、胎次对母猪繁殖性能无显著影响(P>0.05),但不同季节出生的大白母猪分娩的弱仔数、木乃伊数存在显著差异(P<0.05),不同季节出生的长白母猪分娩的死胎数存在显著差异(P<0.05);分娩季节、胎次对母猪繁殖性能有显著影响(P<0.05),但大白猪在不同季节分娩的木乃伊数无显著差异(P>0.05),长白猪在不同胎次分娩的木乃伊数无显著差异(P>0.05)。

This study aims to investigate the effects of birth season and parity on the growth performance and reproductive performance of boars,as well as the effects of farrowing season and parity on the reproductive performance of sows.Multifactor analysis of variance was used to analyze the phenotypic data of growth and reproductive traits of Large White and Landrace sows born in different seasons and parities.The results were as follows:The birth season and parity had significant effects on the growth performance of the breeding pigs(P<0.05).The growth and development speed of the breeding pigs born in spring and autumn was higher than that of the pigs born in the other seasons.The growth performance of the breeding pigs born for 1-4 fetuses showed an increasing trend,reaching the peak value at the 4"h fetus.The growth performance of the breeding pigs born for more than 4 fetuses gradually decreased.The birth season and birth order had no significant effect on the reproductive performance of the sows(P>0.05).However,there was a significant difference in the number of weak piglets and mum-mies delivered by large white sows in different seasons(P<0.05);and there was a significant difference in the number of stillbirths delivered by the large white sows in different seasons(P<0.05).Delivery season and parity had a significant impact on the reproductive performance of Sows(P>0.05).