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农业用水作为消耗水资源最多的部分,在全球和区域水资源消耗中占据很大比例.农业水生产力的评价对于改进区域农业水资源利用方式,促进农业经济发展具有重要意义,尤其是在水资源匮乏地区.首先阐述了作物水生产力的基本概念,分析了影响作物水生产力的核心要素;其次总结了作物水生产力的评价方法,将其分为收获方法、模型方法和集成遥感或GIS的模型方法,并分析了这三类方法优缺点;最后对作物水生产力研究发展趋势进行了展望,认为将RS或GIS与模型结合用来估算作物水生产力的方法,将是目前研究的发展方向.
Agricultural water, as the most consumed part of water resources, accounts for a large proportion of global and regional water consumption, and the evaluation of agricultural water productivity is of great significance for improving the utilization of regional agricultural water resources and promoting agricultural economic development, especially in water resources Lacking areas.Firstly, the basic concept of crop water productivity was expounded and the core elements that affected crop water productivity were analyzed.Secondly, the evaluation methods of crop water productivity were summarized and classified into harvesting methods, model methods and model methods integrating remote sensing or GIS , And analyzed the advantages and disadvantages of these three methods. Finally, the research trend of crop water productivity was prospected. It is believed that the method of combining RS or GIS with model to estimate crop water productivity will be the development direction of current research.