猪舍智能环控设施对规模猪场断奶仔猪存活率的影响分析——基于PSM方法的实证研究
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摘要
笔者运用倾向得分匹配方法,研究了河北省规模猪场采用猪舍智能环控设施前后断奶仔猪存活率的变化。结果表明:规模猪场总投资、保育室面积、分点饲养和全进全出饲养工艺在是否采用猪舍智能环控设施方面存在差异,而这几方面因素又对断奶仔猪存活率存在显著影响(P<0. 05)。当这种选择偏差存在时,就不能确定猪舍智能环控设施对断奶仔猪存活率的准确影响;但通过采用倾向得分匹配方法控制选择偏差以后,规模猪场采用猪舍智能环控设施对断奶仔猪存活率仍然存在显著影响。说明规模猪场采用猪舍智能环控设施能够显著提升断奶仔猪存活率。
By using the propensity score matching method,the author studied the effect of intelligent environment control facility of pig farm on the survival rate of weaning piglets in large-scale pig farms in Hebei Province.The results showed that there were significant differences in the use of intelligent environmental control facilities for large-scale pig farms,such as total investments,the area of nursery,fractional feeding and full-in/full-out feeding technology in the adoption of intelligent environmental control facilities in piggery,and these factors had significant influence on the survival rate of weaned piglets(P<0. 05). When this selection bias is present,it is impossible to determine the exact effect of intelligent environmental control facilities on weaning piglet survival. After controlling the selection bias by using the propensity score matching method,the adoption of intelligent environmental control facilities in large-scale pig farms still has a significant impact on the survival rate of weaned piglets.It indicates that the adoption of intelligent environmental control facilities in piggery in large-scale pig farms can significantly improve the survival rate of weaned piglets.
By using the propensity score matching method,the author studied the effect of intelligent environment control facility of pig farm on the survival rate of weaning piglets in large-scale pig farms in Hebei Province.The results showed that there were significant differences in the use of intelligent environmental control facilities for large-scale pig farms,such as total investments,the area of nursery,fractional feeding and full-in/full-out feeding technology in the adoption of intelligent environmental control facilities in piggery,and these factors had significant influence on the survival rate of weaned piglets(P<0. 05). When this selection bias is present,it is impossible to determine the exact effect of intelligent environmental control facilities on weaning piglet survival. After controlling the selection bias by using the propensity score matching method,the adoption of intelligent environmental control facilities in large-scale pig farms still has a significant impact on the survival rate of weaned piglets.It indicates that the adoption of intelligent environmental control facilities in piggery in large-scale pig farms can significantly improve the survival rate of weaned piglets.
引文
[1]江西增鑫牧业科技有限责任公司技术部.智能化环控系统:中国现代化养猪的发动机[J].猪业观察,2015(3):67-72.
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[8]裴景广.论小型猪场如何提高仔猪存活率[J].中国动物保健,2017,19(1):19-21.
[9]任桂艳.提高仔猪存活率的几个要点[J].吉林畜牧兽医,2017,38(11):19-20.
[2]王美芝,吴中红,刘继军.标准化规模化猪场中猪舍的环境控制[J].猪业科学,2011,28(3):28-31,8.
[3]李修松.规模化猪场环控设备的应用[J].猪业观察,2014(5):73-77.
[4]杨家飞.现代猪场智能化环控技术应用[J].中国畜禽种业,2018,14(9):116.
[5]赵豫旭,龚应高,打三.提高仔猪存活率的技术措施[J].当代畜牧,2013(21):4.
[6]刘巧容.提高仔猪存活率的技术要点[J].南方农业,2016,10(18):185-186.
[7]何小军.提高仔猪存活率的五大要点[J].山东畜牧兽医,2016,37(5):70.
[8]裴景广.论小型猪场如何提高仔猪存活率[J].中国动物保健,2017,19(1):19-21.
[9]任桂艳.提高仔猪存活率的几个要点[J].吉林畜牧兽医,2017,38(11):19-20.