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水肥耦合对玉米田间土壤水分运移的影响
Authors
盛钰
贾宏涛
赵成义
Publication date
1 January 2005
Publisher
Abstract
以干旱区绿洲农田玉米水肥耦合试验为基础,利用含有根系吸水项的一维土壤水动力学模型,模拟了不同水肥条件下玉米蒸散、根系吸水、土体贮水量变化以及田间土壤水量平衡。结果表明:在玉米生长初期以棵间蒸发为主,其后则是以植株蒸腾为主;玉米在30~40cm土层吸水速率达到最大值;玉米灌水量为田间持水量的70%与85%对土壤0~80cm土层贮水量的贡献是相等的,并且高肥力在一定程度上可增强根系的吸水能力,高灌水可增强玉米根系对养分的吸收利用,但对于提高水肥利用率来说,理想的处理为中肥中水
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016