季节和高温对集约化饲养长白猪繁殖性状的影响

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

亚热带集约化条件下配种妊娠舍６、７、８、９月份的月平均舍温分别达到了２９．６℃、３０．５℃、３１．２℃、２９．７℃。经产长白猪春夏秋冬各季节的断奶至配种间隔天数分别为５．５１±２．５４、６．３３±２．９６、５．７３±１．９０、６．２３１３．２９，受胎率分别为８６．２１％、９０．６３％、９０．３２％、９４．２９％，窝活产仔头数分别为９．８３±２．２０、９．７６±１．９４、９．８９±１．６６、９．１５±１．９５，方差结果无显著差异。高温组、常温组的断奶至配种间隔天数分别为６．０４±２．９６、５．８９±２．５６，受胎率分别为９１．４３％、９０．２１％，窝产活仔头数分别为９．７５±ｌ．８７、９．５７±１．９８，ｔ检验无显著差异。

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.