胎次和分娩季节对皖南花猪产活仔数的影响  

Effect of Parity and Breeding Season on the Number of Live Born of Wannanhua Sow

作　　者：殷宗俊[1] 包文斌[1] 陈宏权[1] 蒋模有[1] 郑冬苟 

机构地区：[1]安徽农业大学动物科学系,合肥230061 [2]翕县园艺场种猪场

出　　处：《安徽农业科学》1999年第1期82-83,共2页Journal of Anhui Agricultural Sciences

摘　　要：采用逐步回归和最小二乘模型分析了皖南花母猪525胎次的产活仔数。结果表明，皖南花母猪在4～6胎产活仔数达到最高峰，平均产活仔数分别为11．21，12．80，11．42头。第5胎的估计效应值t5=2．424，与其他胎次差异极显著，但t4与t6差异不显著（P＞0．05）。另外，皖南花母猪窝产活仔数随月份呈双峰双谷形曲线变化。5月和11月有峰值（11．45，11．32），2月和8月出现谷值（9．62，8．71），同时，7～9月份的高温刺激效应对母猪繁殖性能的危害具有延续性。Date on reproductive traits of 525 litters of Wannanhua sow were anglyzed by gradual regression and the least square model. The results indicated that the number of live born(NOLB) of Wannanhua sow reached the highest peak in 4th^6th parity (11. 21, 12. 80, 11. 42 ). The differences between the estimation of effect of 5th, parity (t5 = 2. 424)and other estimations were highly significant(P<0.01) while there was no significant differences between t4 and t6 (P>0.05). In addition, with the change of months,the NOLB of Wannanhua sow followed the curve with double peaks and valleys. There were two peak values (11. 45, 11.32)in May and November, two valley values (9. 62, 8. 71 )in February and August respectively. The demage from the effects of high temprature in July-September was continuous for a long time on the reproductive performance of sow.

关 键 词：母猪 产活仔数 胎次 分娩季节 

分 类 号：S828.3[农业科学—畜牧学]