母猪淘汰：原因及其对生产性能的影响。
Sow wastage: reasons for and effect on productivity.
作者信息
Friendship R M, Wilson M R, Almond G W, McMillan I, Hacker R R, Pieper R, Swaminathan S S
出版信息
Can J Vet Res. 1986 Apr;50(2):205-8.
Abstract
The purpose of this study was to examine the reasons for, the rate and the effect of sow culling on productivity. Sow removal or wastage was investigated by means of producer questionnaires and by detailed production data recorded on 30 swine farms for two years. The sow removal rate was high (mean = 44.2%) with a wide herd-to-herd variation (range = 16% to 100%), and correlated negatively with litter size. Reproductive failure was the most common cause of culling cited by producers. It was concluded that sows on many Ontario farms were being culled prior to reaching their reproductive potential.
摘要
本研究的目的是调查母猪淘汰的原因、比率及其对生产力的影响。通过生产者调查问卷以及30个猪场连续两年记录的详细生产数据，对母猪淘汰或损耗情况进行了调查。母猪淘汰率很高（平均为44.2%），不同猪群之间差异很大（范围为16%至100%），且与窝产仔数呈负相关。繁殖失败是生产者提到的最常见的淘汰原因。研究得出结论，安大略省许多猪场的母猪在达到其繁殖潜力之前就被淘汰了。
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