| 夏玉米水分利用效率的时空变化规律研究 |
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| 引用本文： | 李凤英,黄占斌.夏玉米水分利用效率的时空变化规律研究[J].西北植物学报,2000,20(6):1010-1015. |
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| 作者姓名： | 李凤英 黄占斌 |
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| 作者单位： | 1. 江西农业大学国土资源与环境学院,南昌,330045
2. 中国科学院、水利部水土保持研究所,西北农林科技大学,陕西杨陵,712100 |
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| 基金项目： | 国家重点基础研究专项经费项目!( G1 9990 1 1 7)，陕西省基金项目!( 98SM36)等资助 |
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| 摘 要： | 通过小区试验，本实验在不同生育阶段控水条件下，对玉米不分利用效率（ＷＵＥ）的时空变化规律进行研究。同雄期是玉米的需水关键期，该时期控制供水较充分，供水减产１８．２％，ＷＵＥ减小１６．８％灌浆期适度控水有利于节水增产。拔节期供水对作物株高和干物质积累影响明显，拔节期耗水量对玉米产量形成重要。
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| 关 键 词： | 玉米 水分利用效率 时空变化 水分胁迫 |
| 修稿时间： | 2000-02-23 |
A study on rules of spatiao-temporal change and water use efficiency of corn |
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| LI Feng ying,HUANG Zhan bin,SHAN Lun.A study on rules of spatiao-temporal change and water use efficiency of corn[J].Acta Botanica Boreali-Occidentalia Sinica,2000,20(6):1010-1015. |
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| Authors: | LI Feng ying HUANG Zhan bin SHAN Lun |
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| Abstract: | In order to understand spatio temporal change rules of crop WUE,it was tested in water deficit at different growth stages of corn under field plot condition.The results showed that tasseling stage of corn is the key water reqiuement period.Comparied with the treatment of the full supply water,the grain yield and WUE of corn decease 18.2% and 16.8% respectively.Suitable water defecit at silking stage of corn is usefull to increase yield and save water.Water deficit at the jointing stage markedly influenced plant height and dry matter accumulation of corn,and water consumpation at this stage is very important to yield formation. |
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| Keywords: | Corn water use efficiency spatio temporal chan |
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