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| 二元和三元后备母猪批次化生产技术应用效果分析 |
| Analysis of the effects of batch production technique on the fertility of Landrace×Large Yorkshire and Duroc×Landrace×Large Yorkshire gilts |
| 投稿时间：2020-03-11 |
| DOI： |
| 中文关键词: 批次化生产 季节 三元母猪 二元母猪 繁殖力 |
| 英文关键词:Batch production Season Duroc×Landrace×Large Yorkshire Landrace×Large Yorkshire Fertility |
| 基金项目:现代产业技术体系-生猪-联合育种岗位（ITTPRS2017001） |
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| 中文摘要: |
| 本试验于2018年5～10月在天津某猪场对二元（长×大）和三元（杜×长×大）后备母猪应用批次化生产技术后的静立率、淘汰率、妊娠率和窝产仔数等繁殖力指标进行了统计分析。试验分为常温（5—7月）和高温（8—10月）两个阶段，每批参与试验的二元和三元母猪均大于30头。结果表明：在常温季节，三元后备母猪在静立率、妊娠率和总体妊娠率等方面与二元后备母猪无显著性差异（P>0.05）；而在高温季节，三元后备母猪的静立率、妊娠率和总体妊娠率等方面均显著低于二元后备母猪（P<0.05）。相对于常温季节，高温季节里二元和三元母猪的妊娠率和总体妊娠率均显著降低，但在静立率方面只有三元母猪显著降低（P<0.05）。不论是在高温季节还是在常温季节，三元后备母猪的窝产仔数和窝均产仔数均显著低于二元后备母猪，而淘汰率却显著高于二元后备母猪（P<0.05）。结论：在常温季节，三元母猪静立率和妊娠率均与二元母猪差异不显著；但在高温季节三元母猪静立率和妊娠率均显著低于二元母猪；不论是高温还是常温季节，三元母猪的窝产仔数都显著低于二元母猪，而淘汰率显著高于二元母猪。 |
| 英文摘要: |
The rats of standing, elimination, pregnancy and litter size of Landrace×Large Yorkshire and Duroc×Landrace×Large Yorkshire gilts from a pig farm of Tianjin were statistically analyzed after applying batch production technique during May to October in 2018. The experiment was designed into two periods:normal temperature season (May-July) and high temperature season (August-October). Each batch contained at least 30 gilts in each group. The present study showed that there were no significant differences between Landrace×Large Yorkshire and Duroc×Landrace×Large Yorkshire gilts in the rates of standing, gestation and total gestation in the normal temperature (NT) season (P>0.05). However, the rates of standing, gestation and total gestation of Duroc×Landrace×Large Yorkshire gilts were all significantly lower than those of Landrace×Large Yorkshire gilts in the high temperature (HT) season (P<0.05). Comparing to NT season, the rates of gestation and total gestation of Duroc×Landrace×Large Yorkshire and Landrace×Large Yorkshire gilts both greatly decreased, whereas, only Duroc×Landrace×Large Yorkshire exhibited the significant reduction in standing rate in the HT season (P<0.05).Both the litter size and live litter size of Duroc×Landrace×Large Yorkshire gilts were significantly lower, while the elimination rate was significantly higher than those of Landrace×Large Yorkshire gilts no matter in the NT or in the HT seasons (P<0.05).
In a word, the rates of standing and pregnancy of Duroc×Landrace×Large Yorkshire gilts exhibited no different from Landrace×Large Yorkshire gilts in the NT season. Nevertheless, the rates of standing and pregnancy of Duroc×Landrace×Large Yorkshire gilts were significantly lower than those of Landrace×Large Yorkshire gilts in the HT season. The litter size and live litter size of Duroc×Landrace×Large Yorkshire gilts were significantly lower but the elimination rate was significantly higher than those of Landrace×Large Yorkshire gilts in the both HT and NT seasons. |
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