Investigation And Analyze On The Reproductive Performance Of Sows Of A Breeding Pig Farm At Hunan

Sow breeding level is one of the important indicators affecting the economic benefits of large-scale pig farms.Based on the production data of 2015 and 2016 of a pig farm in Hunan Province,this study was conducted through the data of sow delivery rate,breeding number,number of childbirth,number of litterlets,litter size and sow mortality To study the production capacity of sows.By analyzing the factors affecting the breeding of sows,the whole reproductive performance of the pig breed was studied,which provided the scientific basis for improving the production performance.According to the survey results we found that the impact of the sow fecundity of the main reasons are the following.First,the viral disease caused the sow reproductive performance decreased;second,different breeds of sperm semen on sow litter size have a certain impact;third,different sows of the total litter size and litter The number of children is also different,the data show that 3-5 fetal sows litter size higher.As the field has been popular in the blue ear and pseudo mad,out of a large number of i nfected sows,therefore,the existing sow herds there is the risk of infection.It is recommend ed that the field immediately begin serological monitoring,regulate the immunization progra m,and strictly abide by the biosecurity and epidemic prevention measures,standardize the pr oduction operation flow and restore the sow's productivity.