| 基于DSSAT模拟的不同水分利用效率指标区域评价差异研究 |
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| 引用本文： | 杨晓慧,黄修桥,王景雷,段福义,孙秀路.基于DSSAT模拟的不同水分利用效率指标区域评价差异研究[J].节水灌溉,2016(12):8-14. |
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| 作者姓名： | 杨晓慧 黄修桥 王景雷 段福义 孙秀路 |
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| 作者单位： | 1. 中国农业科学院农田灌溉研究所 河南省节水农业重点实验室，河南 新乡453003; 中国农业科学院研究生院，北京100081;2. 中国农业科学院农田灌溉研究所 河南省节水农业重点实验室,河南 新乡,453003;3. 中国农业科学院农田灌溉研究所,河南 新乡,453003 |
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| 基金项目： | “十二五”农村领域国家科技支撑计划课题(2014BAD12B05;2012BAD08B02)，中国农业科学院科技创新工程团队“节水高效灌溉技术与装备”项目。 |
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| 摘 要： | 为研究不同水分利用效率评价指标在区域评价方面的差异、相关关系和适用性,利用DSSAT-CERESWheat模型模拟得到不同定义下的农田总供水分利用效率(WUEg)、广义水分利用效率(WUEu)、作物水分生产率(WP)和灌溉水利用效率(WUEi)及真实灌溉水利用效率(WUEti)5个常用评价指标,分析得出:1 WUEu与WUEg站点间、年际间及区域水平评价结果均一致,推荐使用WUEg;2WUEi不能表征真实的灌溉水利用效率,但黄淮海区域水平WUEi表征结果实则接近总水分利用效率;3WUEti站点和区域水平均难以计算不方便使用;4站点水平各指标相关关系不同,但区域水平各指标间均呈良好的正相关性。站点和区域水平不同指标评价结果均有差异;站点水平WP评价结果最稳定,区域水平WUEg评价结果最稳定。
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| 关 键 词： | 水分利用效率 指标 DSSAT 冬小麦 |
The Differences of Variety Water Use Efficiency Indices in Regional Evaluation Based on DSSAT Simulation |
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| Abstract: | In order to quantify the differences, correlation and use conditions between different forms of water use efficiency evaluation indi-ces, this paper calculates water use efficiency under 5 different definitions by DSSAT-CERES-Wheat model simulation, including five com-monly used evaluation indices, namely farmland total water use efficiency( WUEg), generalized water resources use efficiency(WUEu), crop water productivity (WP), irrigation water use efficiency (WUEi) and real irrigation water use efficiency(WUEti). The research con-cludes that:①The evaluation results of WUEu and WUEg are consistent among the interannual, site level and regional level. ② WUEi can't represent the real irrigation water use efficiency, but WUEi represents the total water use efficiency in Huang huaihai area. ③WUEti is hard to calculate and inconvenient to use on site level and regional level. ④Pearson's correlation coefficient ( R) is different among variety water use efficiency indices on site level, but in a good positive correlation on regional level. The conclusion is that there are differences among the evaluation results of variety water use efficiency indices on site level and regional level. The evaluation results of WP are the most stable on site level and WUEg on regional level. |
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| Keywords: | water use efficiency indices DSSAT winter wheat |
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