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首页> 外文期刊>Zeitschrift fur Bewasserungswirtschaft >The feasibility of applying variable rate water application under a Centre Pivot Irrigation System
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The feasibility of applying variable rate water application under a Centre Pivot Irrigation System

机译：在中心枢轴灌溉系统下应用可变速率的水的可行性

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摘要

The purpose of this paper was to assess the feasibility and significance of applying spatially variable irrigation under a centre pivot irrigation system at the Federal Agricultural Research Center, Braunschweig, Germany. The assessment was based on soil moisture holding capacity, soil depth variation and root development. Soil texture analysis was carried out by sampling on a 60 meter grid. The German Agro-Meteorological Model was applied to simulate the water balance in the crop-soil-atmosphere system for the growing season 2003/4. The research findings are presented in terms of sil scenarios: 20,30,40 mm water application depths per irrigation under both variable rate application and uniform application. The comparison revealed that the loss of water was higher for the uniform application scenarios than that for the variable rate application (VRA) scenarios for the applications of 20 and 30 mm. The VRA scenario of 20 mm water application was found to be the best option for water conservation.
机译：本文的目的是评估在德国不伦瑞克联邦农业研究中心的中心枢纽灌溉系统下应用空间可变灌溉的可行性和意义。评估基于土壤水分保持能力，土壤深度变化和根系发育。土壤质地分析是通过在60米长的网格上取样进行的。应用德国农业气象模型来模拟2003/4生长季节作物-土壤-大气系统中的水分平衡。研究结果是根据硅的情况提出的：在可变速率施用和均匀施用下，每次灌溉的施水深度为20、30、40 mm。比较表明，对于20 mm和30 mm的应用，均匀应用场景的水损失要比可变速率应用（VRA）场景的水损耗高。发现使用20毫米水的VRA方案是节水的最佳选择。

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