| 京白鸡产蛋期各项指标与开产日龄关系的研究 |
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| 引用本文： | 王平,王恒星. 京白鸡产蛋期各项指标与开产日龄关系的研究[J]. 北京农学院学报, 1987, 0(2) |
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| 作者姓名： | 王平 王恒星 |
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| 作者单位： | 北京农学院畜牧兽医系，北京军区鸡场 |
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| 摘 要： | 本文研究了京白鸡商品蛋鸡产蛋期各项指标与开产日龄的关系,结果发现,在开产日龄为156—176天的范围里,产蛋期存活率、周最高产蛋率与开产日龄之间的回归关系不显著(P>0.05)。进入产蛋高峰的周龄、72周饲养日平均产蛋率、平均蛋重、72周饲养日总蛋重、产蛋期料蛋比等指标与开产日龄之间存在回归关系(P<0.05),这些回归式可用于生产予报,根据研究结果还初步确定,京白鸡的适宜开产日龄为156—165天。
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| 关 键 词： | 开产日龄 指标 |
A STUDY OF THE RELATION OF VARIOUS INDEXESOF BEIJING WHITE LAYRR AND AGE AT FIRST LAYING |
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| Wang Ping. A STUDY OF THE RELATION OF VARIOUS INDEXESOF BEIJING WHITE LAYRR AND AGE AT FIRST LAYING[J]. Journal of Beijing Agricultural College, 1987, 0(2) |
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| Authors: | Wang Ping |
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| Abstract: | In this report,a relation of various indexes of Beijing White commerciallayerand age at first laying was studied. The results were when first laying is from156 to 176(day), the regression is not significant between liveability in layingperoid, the highest laying rate in a week and age at first laying (p>0.05).However, there is a regression between the week-age in laying high-tide,the average laying rate in 72 weeks hen-day basis, average egg weight, thetotal egg weight in 72 weeks hen-day basis, the feed-egg ratio in layingperiod and age at first laying (p<0.05).These regression formula can beuseed as prediction of production. This study results primary confirm thatthe suitable age at first laying is from 156 to 165 days. |
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| Keywords: | Age at first laying Index |
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