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Water productivity benchmarks: The case of maize and soybean in Nebraska

机译:水生产率基准:内布拉斯加州玉米和大豆的情况

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Water productivity benchmarks for irrigated and rainfed agriculture will provide relevant information to manage scarce water resources and control groundwater level decline. We analyse the temporal and spatial variation of the water productivity (WP) of maize and soybean in Nebraska, with WP defined as harvested crop weight per total evapotraspiration. The results show that WP of both maize and soybean increase from west to east within Nebraska and have increased over the last 25 years, mainly due to the increase in crop yields (land productivity). We derive WP benchmarks for each crop per climate zone. Increasing actual WPs in the state to benchmark levels will increase yields by 21 % for maize and by 19 % for soybean. The WP benchmark levels for the two crops presented here will help formulating targets for closing water productivity gaps and improving the sustainability of water use in the state.
机译:灌溉和雨量农业的水生产率基准将提供管理稀缺水资源和控制地下水位下降的相关信息。 我们分析内布拉斯加州玉米和大豆水生产率(WP)的时间和空间变化,WP定义为每种总蒸发的收获作物重量。 结果表明,在内布拉斯加州的西部向东增加了玉米和大豆增加,过去25年来增加,主要是由于作物产量增加(土地生产力)。 我们为每个气候区的每种作物获得WP基准。 将国家的实际WPS增加到基准水平将增加21%的玉米产量和19%的大豆。 这里提出的两种作物的WP基准级别将有助于制定用于闭合水生产率差距的目标,并提高国家中使用的可持续性。

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