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Presowing fertigation effects on soil moisture absorption and consumption of cotton in arid regions

文献类型： 外文期刊

作者： Chen, Zongkui 1 ; Xia, Jun 1 ; Ma, Hui 1 ; Wang, Yuanyuan 1 ; Gao, Hongyun 1 ; Kong, Xianhui 2 ; Luo, Honghai 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 832003, Xinjiang, Peoples R China

关键词： Water-nutrient management; Cotton; Root; Sap flow; Water productivity

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： 2018 年 210 卷

页码：

收录情况： SCI

摘要： To increase the yield and water-use efficiency of cotton in arid regions, irrigation and fertilizer management must be optimized. This study evaluated the effects of two irrigation levels (i.e., with (W-80) and without (W-0) presowing irrigation) combined with two basal fertilization methods (i.e., surface application (F-10) and deep application (F-30)) on soil water absorption and transport, and relationships with water-use efficiency. Our results showed significantly positive relationships between water-use efficiency and the root surface area in the 0-30 cm soil layer (RSA-30), root vigor in the 0-30 cm soil layer (RV-30), root vigor in the 60-80 cm soil layer (RV-80), the leaf transpiration rate, stomatal conductance, sap flow, and water productivity. Principal component analysis showed that the W80F10 treatment initially positively influenced RSA-30, RV-30, and RV-80 and that these parameters affected the leaf transpiration rate, stomatal conductance, sap flow, and leaf area (i.e., the main transpiration area), which finally influenced water productivity and water-use efficiency. In addition, the W80F10 treatment increased the ability of aerial parts to compete for water after 69 days after emergency. These findings indicate that the combination of presowing irrigation and basal fertilizer surface application can enhance the ability of aerial parts to compete for water and increase water-use efficiency by promoting water absorption and consumption after the full flowering stage. This research provides valuable information on agricultural management in aridregions.

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