| 不同土壤目标含水量对夏玉米光合性能及产量的影响 |
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| 引用本文： | 李素美,东先旺,陈建华.不同土壤目标含水量对夏玉米光合性能及产量的影响[J].华北农学报,1999,14(3):55-59. |
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| 作者姓名： | 李素美 东先旺 陈建华 |
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| 作者单位： | 1. 莱阳农学院,山东莱阳,265200
2. 威海农业局,山东威海 |
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| 摘 要： | 利用防雨设施研究了不同土壤目标含水量对夏玉米光合性能及产量的影响，结果表明，土壤水分含量与产量密切相关，夏玉米产量形成的土壤水分临界值为田间持水量的４５％左右，最佳产量形成的土壤水分临界值为８０％，５０％左右是夏玉米出苗的土壤水分临界值，７０％左右是最佳出苗率的土壤水分临界值，土壤干旱及过湿均使光合面积，光合势，干物质积累强度及光合速率下降，导致大幅度减产，夏玉米不同生育阶段对水分的需求量有别，有
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| 关 键 词： | 夏玉米 土壤目标含水量 光合性能 产量 |
Effect of Different Target Water Content in Soil on Photosynthetic Property and Yield of Summer-sowing Corn |
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| Li Sumei,Dong Xianwang,Chen Jianhua.Effect of Different Target Water Content in Soil on Photosynthetic Property and Yield of Summer-sowing Corn[J].Acta Agriculturae Boreali-Sinica,1999,14(3):55-59. |
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| Authors: | Li Sumei Dong Xianwang Chen Jianhua |
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| Abstract: | The effect of different target water content in soil on the photosynthetic property and yield of summer sowing corn was studied under the rain proof condition.The results showed that the moisture content in soil was closely related to yield,the critical values of moisture content in soil were 45% of field water capacity at period of yield formation,80%at period of optimum yield formation,50% at period of seedling emergence,70% at period of optimum seedling emergence.Dry or over wet soil tended to decrease photosynthetic area,potential and rate,the accumulative intension of dry matter,that caused the drop of crop yield with a great scope.The requirement for soil water content differed at the different growing time,the waterndices that were useful for the summer sowing cron photosynthetic property were:50% to 80% for the seedling stage,60% to 80% for the jointing stage and after that, and 70% to 80% was the best excellent. |
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| Keywords: | Summer sowing corn Target water content of soil Photosynthetic property Yield |
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