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Beffects of seasons and High Temperature on some Reprodutve Traits in Intensive Feedig Landrace

Peng Guoliang;Chen Deqiang;Yang Jingpei;et al(Institute of Animal science Guangdong Academy of Agriculture Science Guang zhou 510640)  
In Pregnancy house,the average of temperature in June,July,August and September were29.6℃,30.5℃,31.2℃and 29.7℃. respectively.In the spring ,summer,autumn and winter,the weaning-mating interval were 5.51±2.54d,6.33±2.96d,5.75±1.90d and 6.23±3. 29d; the pregnancy rate were 86. 21%,90.63%,90.32%and 94.29%;the aiive piglets per netatbirth were 9.83±2.20;9.76±1.94,9.89±1.66 and 9. 15±1. 95 in Landrace;respectively.It was not significant difference among them by analysis of variace.In the hightemperature and con-tral group,the weaning-mating interval were 6.04±2.96d and 5. 89±2.56d;the pregnancy ratewere 91.43%and 90.21%;the alive piglets per net at birth were 9.75±1.87 and 9.57±1.98in Landrace;respectively. It was not significant difference between them by t-test.
【CateGory Index】: S828.3
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