【摘要】 文章旨在研究产仔月份及背膘厚度对母猪繁殖性能的影响，试验选择四川某猪场2～5胎次经产长大二元母猪1581头为研究对象，从产仔月份与母猪繁殖性能、背膘厚度与母猪繁殖性能两个方面进行生产数据统计分析。一方面收集不同产仔月份母猪窝产健子数、断奶7d发情率、母猪死亡率；另一方面对妊娠30、75、105d的母猪进行背膘测定，同时收集相应母猪的窝产仔数、活仔数、健仔数、弱仔数等数据。结果分析表明，母猪产仔窝均健仔数在3、4、5、6月份较高，在1、7、11、12月份较低；7、8月份母猪死亡率较高；断奶7d发情配种率在3、4、5、6月份较高，1、11月较低；母猪妊娠30d时妊娠母猪最佳背膘厚为15～16mm，妊娠中期母猪最佳背膘厚为17～18mm，妊娠后期母猪最佳背膘厚为19～20mm。产仔月份、背膘厚度对母猪繁殖性能有较大影响。更多还原

【Abstract】 In order to explore the effects of farrowing month and backfat thickness on sow reproductive performance,1581 binary sows with 2 ～ 5 births in a pig farm in Sichuan were selected as the research object,and the production data were statistically analyzed from the aspects of farrowing month and sow reproductive performance,back fat thickness and sow reproductive performance. On the one hand,the number of births,7d estrus rate and sow mortality rate in sows in different farrowing months were collected. On the other hand,the back fat measurement of sow gestation(30 d),(75 d)and(105 d)was selected,and the litter number,live litter number,healthy litter number,weak litter number and other data of the corresponding sows were collected. The analysis of statistical results showed that the average litter size of sows was higher in March,April,May and June,and lower in October,July,November and December. Sow mortality was higher in July and August;The weaning 7-day estrus breeding rate was higher in March,April,May and June,and lower in January and November. The optimal back fat thickness of gestational sows is 15 ～ 16 mm at 30 days gestation,17 ～ 18 mm for sows in the second trimester,and 19 ～ 20 mm for sows in the third trimester. The farrowing month and back fat thickness have a great influence on the reproductive performance of sows.更多还原