用长系列资料分析冬小麦灌溉增产效益

Analysis on Irrigation Increasing Efficiency of Winter Wheat With Long-series Data

科学、合理地评估农作物的灌溉增产效益,是进行灌区建设和技术改造可行性研究的基础和前提,也是实行节水灌溉以及评价节水效益的科学依据。在半干旱地区灌溉效益受降雨蒸发等气象因素影响较大,依靠短期的试验或调查难以获得合理可靠的灌溉增产效益值,依据长系列气象资料的分析是获得更为准确的灌溉效益值的重要方法。文中以山西介休冬小麦为研究对象分析了作物产量和效益长系列(1978~2013年)的变化,给出了不同灌溉供水量条件下多年平均的产量和效益。

scientific and reasonable estimate on crops irrigation increasing production efficiency is not only a foundation and premise of taking feasibility study on irrigation district construction and technical reformation,but also is a scientific basis on adopting water-saving irrigation and evaluating water-saving benefit. In semiarid region,for the great influence by the many weather factors such as rainfall and evaporation,the method of relying on short-term test or investigation is unavailable to obtain reliable irrigation increasing production efficiency value. Therefore,based on the analysis of the long series of weather data is more important and accurate method of irrigation benefit value. This text analyzes the variation on crop yield and benefit of long series taking winter wheat of Jiexiu in Shaixi as the research object(1978-2013),which gives many year's average yield and benefit under the different conditions of irrigation water supply.