EFFECTS OF WATER STORAGE IN DEEPER SOIL LAYERS ON GROWTH, YIELD, AND WATER PRODUCTIVITY OF COTTON (GOSSYPIUM HIRSUTUM L.) IN ARID AREAS OF NORTHWESTERN CHINA
文献类型： 外文期刊
作者： Luo, Honghai 1 ; Zhang, Hongzhi 1 ; Han, Huanyong 2 ; Hu, Yuanyuan 1 ; Zhang, Yali 1 ; Zhang, Wangfeng 1 ;
作者机构： 1.Shihezi Univ, Xinjiang Prod & Construct Grp, Key Lab Oasis Ecoagr, Shihezi 832003, Xinjiang, Peoples R China
2.Xinjiang Acad Agr & Reclamat Sci, Cotton Inst, Shihezi, Peoples R China
关键词： available soil water;water productivity;photosynthesis;root distribution;drip irrigation
期刊名称：IRRIGATION AND DRAINAGE （ 影响因子：1.328； 五年影响因子：1.435 ）
ISSN： 1531-0353
年卷期： 2014 年 63 卷 1 期
页码：
收录情况： SCI
摘要： In order to understand how the available water stored prior to planting (ASWp) affects cotton yield and the relative physiological parameters, we designed two ASWp levels in columns, well-watered (P-90) and no watering (P-0), combined with different water management scenarios during the cotton-growing period, 70% of field capacity (FC) during the third leaf to boll opening stage (I-70) and changed the third leaf to flowering stage in 55% of FC and 80% of FC thereafter (I55-80). P-90 enhanced root length density (RLD), surface area density (RSD), and root activity, which in turn increased the efficiency of ASWp usage. A significantly higher leaf water potential, net photosynthesis rate, above-ground dry matter (DM), and yield were found in P-90 than in P-0. Under well-watered conditions, I55-80 had a higher RLD in the 40-120cm layer compared with I-70. However, root mass density (RMD) and DM in I55-80 were significantly decreased that led to marked decreases in yield and, to a lesser extent, in water productivity (WP). Under no watering conditions, yield and WP were significantly increased in I-70 relative to I55-80. It showed that sufficient water in deeper soil layers and a sustained 65-75% of FC could be an appropriate drip irrigation mode for the local cotton field. Copyright (c) 2013 John Wiley & Sons, Ltd.
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