Effect of soil water deficit on evapotranspiration, crop yield, and water use efficiency in the North China Plain
文献类型：SCI/SSCI论文
| 作者 | Yu Q. |
| 发表日期 | 2004 |
| 关键词 | soil water deficit (SWD) evapotranspiration (ET) grain yield water use efficiency (WUE) irrigation winter wheat maize North China Plain winter-wheat irrigation environment components management region maize |
| 英文摘要 | In the North China Plain (NCP), excessive groundwater pumping is a serious problem. In this study, different groundwater irrigation schedules were applied. A simple soil water balance approach was introduced to evaluate crop evapotranspiration (ET) and water use efficiency (WUE). Under normal irrigation scheduling, groundwater mining occurs at a rate of over 200 mm per year from a rapidly depleting aquifer system. Severe soil water deficit (SWD) decreases grain yield (GY) of wheat (Triticum aestivum L.) and maize (Zea mays L.), while slight SWD in a growth stage from spring green up to grain-filling winter wheat did not evidently reduce GY and WUE. A severe or slight SWD significantly reduces ET, which mainly depends on irrigation amounts. Thus, it is possible to reduce ET somewhat without significantly decreasing GY ET was correlated to GY in a parabolic function, and maximum yield for winter wheat occurred when optimal ET for winter wheat was about 447 mm. It was important for wheat and maize to be irrigated before sowing to improve soil water storage (SWS), and the effect of the irrigation apparently increased wheat GY. (C) 2003 Elsevier B.V. All rights reserved. |
| 出处 | Agricultural Water Management |
| 卷 | 64 |
| 期 | 2 |
| 页 | 107-122 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0378-3774 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22321]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yu Q.. Effect of soil water deficit on evapotranspiration, crop yield, and water use efficiency in the North China Plain. 2004. |
入库方式： OAI收割
来源：地理科学与资源研究所
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