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棉花膜下滴灌水氮耦合效应研究
Authors
刘新永
田长彦
Publication date
1 January 2007
Publisher
Abstract
在南疆气候条件下,研究了膜下滴灌棉花水氮耦合效应。结果表明,在膜下滴灌条件下,水氮存在明显的互作效应,水分胁迫极大地抑制肥效发挥,而水分适宜时,不同氮肥处理棉花产量差异显著;氮肥也促进了水分效应的发挥,但是水分是棉花产量的主效应因子。试验中最优水氮组合为每公顷灌水505 mm、氮肥225 kg。高产棉花冠层指标分别为:株高66.9 cm、叶龄15.6个、果枝13.1台、成铃数8.9个。水氮胁迫缩短了棉花生育期,这可能是不同水氮处理棉花产量差异的主要原因
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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