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膜下滴灌条件下水分对棉花根系分布特征的影响
Authors
串志强
方怡向
+3 more
林青慧
盛钰
赵成义
Publication date
1 January 2007
Publisher
Abstract
通过分层土柱挖掘法,研究膜下滴灌条件下不同滴灌量棉花(Gossypium hirsutum L.)根系的分布特征。结果表明:直径>1 mm的粗根只分布在40 cm以上的土层;随着土层深度增加,棉花根系生物量逐渐减少;但随着滴灌量减少,土壤深层根系生物量有增加趋势。不同处理的根系生物量的分布与土层深度呈显著的负指数关系,棉花细根生物量、根长、根表面积在土壤中垂直分布都呈"单峰型"曲线变化规律;但随着滴灌量的减少,棉花根系消弱系数β呈增加趋势
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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