摘要
本试验使用B超仪分别对大白猪、长白猪一个妊娠周期内不同时期的背膘厚进行跟踪测定,分析不同时期的背膘厚对繁殖性能的影响,以期在不同妊娠时期中确定有利于繁殖性能的背膘厚范围,为指导母猪妊娠期的饲养管理提供依据。结果表明:在大白猪妊娠60日龄之前高背膘厚(>18.41 mm)对所测定的繁殖性能具有有利作用,但在妊娠60日龄之后则要控制背膘厚,使背膘厚处在中等水平(13.26 mm<x≤17.13 mm)。在长白猪整个妊娠过程中都应该保持中等背膘厚(13.82 mm<x≤18.18 mm),尤其在妊娠90日龄至上产床期间,中等水平背膘厚对总产仔数、产活仔数及初生窝重具有明显的促进作用。
The tracking measur ements of different backfat thickness in one gestation cycle were implemented in Large White and Landrace sows with the B-mode ultrasonic scanner, then the effects of backfat thickness in different gestation periods on reproductive performance were analyzed to determine favorable ranges of backfat thickness in different gestation periods and provide the reference for the breeding management of pregnancy. The results showed that high backfat thickness（〉18.41 mm） had favorable effects on measured reproductive performances before 60 days of pregnancy, while the backfat thickness should be controlled after 60 days of pregnancy and stay the medium level（13.26 mmx≤17.13 mm） in Large White sows. In the entire process of pregnancy, medium backfat thickness（13.82 mm x ≤18.18 mm） should be maintained in Landrace pigs. Especially, medium backfat thickness played an obvious role in promoting total number born, number born alive and litter weight at birth from 90 days of pregnancy to the pregnancy in farrowing crate.
出处
《中国畜牧杂志》
CAS
北大核心
2014年第21期7-11,共5页
Chinese Journal of Animal Science
基金
江苏省科技支撑计划(BE2013345
BE2012330)
常州市科技支撑计划(CE2013011)
扬州市农业科技攻关项目(YZ2011048)
关键词
背膘厚
妊娠
繁殖性能
猪
backfat thickness
pregnancy
reproductive performance
sows
