Response of root morphology and distribution in maize to alternate furrow irrigation

文献类型： 外文期刊

第一作者： Li, Caixia

作者： Li, Caixia;Sun, Jingsheng;Zhou, Xinguo;Li, Zhongyang;Qiang, Xiaoman;Guo, Dongdong;Li, Fusheng

作者机构：

关键词： Alternate furrow irrigation;Minirhizotrons;Root morphology;Water use efficiency

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

ISSN： 0378-3774

年卷期： 2011 年 98 卷 12 期

页码：

收录情况： SCI

摘要： After measuring root morphological indices, such as the length, diameter, volume density, surface area and tip number of both living and dead roots on the ridge and slope under alternate furrow irrigation (AFI) and conventional furrow irrigation (CFI, control treatment) using Minirhizotrons, the responses of root morphology and distribution in maize to AFI were analyzed. Results show that root morphological indices of living or dead roots were lower on the ridge than on the slope under AFI, whereas root morphological indices of living or dead roots were higher on the ridge than on the slope under CFI. Compared to CFI, AFI significantly increased root tip number and surface area of fine roots (with the diameter of <= 2.5 x 10(-1) mm) and promoted roots to deeper soil on the slope, and then simulated root water uptake. AFI only decreased the grain yield by 0.9%, but increased water use efficiency on seed yield by 8.3%. Thus AFI promoted root growth and metabolism on the slope, increased the effective absorption area of root system and improved water use efficiency without significant reduction of grain yield. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

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