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The Study of Limited Irrigation on the Winter Wheat and Water Utilization
Authors
邓西平
Publication date
1 January 1999
Publisher
Abstract
采用越冬前、拔节、抽穗和灌浆4个灌水时期和每次60与120mm两个灌水量的组合设计,在大田条件下对冬小麦的灌水量与耗水量、产量、水分利用效率(WUE)以及灌水效率(IUE)和有限灌溉的下限与适宜的灌水时期进行了小区试验研究,并建立了冬小麦产量与耗水以及WUE与耗水的回归数学模型。试验结果表明,冬小麦在渭北地区的耗水量与产量和WUE之间均呈现非线性关系;满足最大产量时所需的补充灌水量约为180~220mm;满足WUE最大时的补充灌水量为60~80mm。研究结果还显示,在底墒良好的条件下,拔节期60mm的有限灌溉可以同步提高子粒产量和WUE冬季60mm和拔节期60mm的两次有限灌溉,对于改善渭北地区冬小麦的苗期生长发育和提高产量、WUE和灌水效率也有明显作
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018