| 长白猪不同胎次繁殖性能的比较研究 |
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| 引用本文： | 吴正常,王瑾,郑先瑞,梁永晔,孙寿永,吴圣龙.长白猪不同胎次繁殖性能的比较研究[J].安徽农业科学,2012,40(26):12906-12908. |
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| 作者姓名： | 吴正常 王瑾 郑先瑞 梁永晔 孙寿永 吴圣龙 |
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| 作者单位： | 扬州大学动物科学与技术学院,江苏扬州,225009;扬州市宝应县畜牧兽医站,江苏宝应,225800;扬州大学动物科学与技术学院,江苏扬州225009;江苏省扬州规模猪场高效健康养殖公共技术服务中心,江苏扬州225009 |
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| 基金项目： | 江苏省科技支撑计划(农业)项目(BE2009330-2,BE20104-50);常州市科技攻关项目(CE20092004,CE20102006) |
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| 摘 要： | 目的]进一步了解长白猪的繁殖性能,为长白后备母猪的选种提供指导。方法]对长白母猪核心群不同胎次的繁殖性能进行比较,并对后备母猪的不同胎次产仔数、初生窝重、28日龄断奶窝重、断奶成活率等进行了比较和相关性分析。结果]长白母猪第1胎产仔数最少,逐步上升至第3胎开始稳定,到第4胎达到最高水平,第5、6胎略有下降。第1胎仔猪的断奶成活率最低,第3胎仔猪的断奶成活率最高。不同胎次的断奶窝重以第1胎最低,从第2胎到第4胎稍有上升并在第5胎后趋向稳定,并且断奶窝重主要与断奶仔猪数有关。相关性分析表明,第2胎与第6胎的断奶仔猪数呈显著正相关。结论]第3胎繁殖性能相对稳定,可反映母猪的繁殖性能,因此长白猪中第3胎次的繁殖性能可作为淘汰后备母猪的重要依据。
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| 关 键 词： | 长白猪 繁殖性能 胎次 |
Comparative Analysis of Reproductive Performance of Landrace Pigs of Different Litters |
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| Institution: | WU Zheng-chang et al(College of Animal Science and Technology,Yangzhou University,Yangzhou,Jiangsu 225009) |
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| Abstract: | Objective] To study the reproductive performance of landrace pigs,so as to provide guidance for the selection of reserve gilt breeders.Method] The reproductive performance of landrace pigs of different litters was compared,the relationships between some parameters in gilts,such as litter size,birth weight,weaning weight(28 days),and weaning survival rate have been analyzed.Result] The litter size was the least in the first parity,then it increased gradually and reached the highest level in the 4th parity,while the 5th and the 6th parity decreased slightly.The 1st parity had the lowest survival rate and the 3rd parity had the highest.The results of different parities’ weight of weaning litter showed that the first parity was the lowest,then it increased from the 2nd parity to the 4th and tended to be stabilized after the fifth parity,which prompted that the weight of weaning litter was mainly determined by the amount of weaning piglets.The correlation analysis showed a significant positive correlation only between the weaning weights of the 2nd and 6th parity.Conclusion] The reproductive performance of the 3rd was stable,which can reflect the reproductive performance of sows and can be used as an important basis to eliminate the sows. |
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| Keywords: | Landrace pigs Reproductive performance Litter |
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