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Effectiveness of a water-saving super-absorbent polymer in soil water conservation for corn (Zea mays L.) based on eco-physiological parameters

文献类型： 外文期刊

作者： Islam, M. Robiul 1 ; Hu, Yuegao 2 ; Mao, Sishuai 1 ; Mao, Jinzhu 1 ; Eneji, A. Egrinya 4 ; Xue, Xuzhang 1 ;

作者机构： 1.Natl Res Ctr Intelligent Agr Equipments, Beijing 100097, Peoples R China

2.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China

3.Rajshahi Univ, Dept Agron & Agr Extens, Rajshahi 6205, Bangladesh

4.Univ Calabar, Dept Soil Sci, Calabar, Nigeria

关键词： corn; drought stress; soil water; auto-irrigation; water use efficiency; super-absorbent polymer

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.638； 五年影响因子：3.802 ）

ISSN： 0022-5142

年卷期： 2011 年 91 卷 11 期

页码：

收录情况： SCI

摘要： BACKGROUND: The objective was to study soil water conservation and physiological growth of corn (Zea mays L.) using water-saving super-absorbent polymer (SAP) at 30 kg ha(-1). The effectiveness of SAP was studied under three irrigation levels (adequate, moderate and deficit) using a new type of negative hydraulic pressure controlled auto-irrigator in the years 2009 and 2010 in a greenhouse at Beijing, P.R. China. RESULTS: Eight weeks after sowing, plant height and leaf area increased significantly by 41.6 and 79.6% under deficit irrigation for SAP treatment. The SAP had little effect on shoot dry mass under adequate and moderate irrigation but increased it significantly by 133.5% under deficit irrigation. Similarly, the efficiency of water use also increased by 97.1%. Leaf water potential under adequate and moderate irrigation differs slightly for SAP application, whereas under deficit irrigation the values were exceeded significantly by 27.8%. The superior growth and water use efficiency of corn treated with SAP under deficit irrigation was ascribed to maintenance of higher relative water contents in leaves as well as intercellular carbon dioxide concentration, net photosynthesis and transpiration rate. CONCLUSIONS: Our results suggested that plant growth and different physiological activities are restricted by drought stress and the application of super-absorbent polymer could conserve soil water, making same available to plants for increased growth and biomass accumulation especially under severe water stress. Thus, application of SAP is a suitable soil management practice for the locations characterised by severe water stress. (C) 2011 Society of Chemical Industry

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