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Effects of different irrigation methods on micro-environments and root distribution in winter wheat fields

Journal of Integrative Agriculture 2015年第8期14卷 1658-1672页

作者： Lü Guo-hua SONG Ji-qing BAI Wen-bo WU Yong-feng LIU Yuan KANG Yao-hu State Key Engineering Laboratory of Crops Efficient Water Use and Drought Mitigation Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

The irrigation method used in winter wheat fields affects micro-environment factors, such as relative humidity（RH） within canopy, soil temperature, topsoil bulk density, soil matric potential, and soil nutrients, and these changes may affect plant root *** experiment was carried out to explore the effects of irrigation method on micro-environments and root distribution in a winter wheat field in the 2007–2008 and 2008–2009 growing *** results showed that border irrigation（BI）, sprinkler irrigation（SI）, and surface drip irrigation（SDI） had no significant effects on soil *** bulk density, RH within the canopy, soil available N distribution, and soil matric potential were significantly affected by the three *** change in soil matric potential was the key reason for the altered root profile distribution ***, more fine roots were produced in the BI treatment when soil water content was low and topsoil bulk density was *** growth was most stimulated in the top soil layers and inhibited in the deep layers in the SDI treatment, followed by SI and BI, which was due to the different water application *** a result, the root profile distribution differed, depending on the irrigation method *** root distribution pattern changes could be described by the power level variation in the exponential function.A good knowledge of root distribution patterns is important when attempting to model water and nutrient movements and when studying soil-plant interactions.

关键词： border irrigation root profile distribution sprinkler irrigation surface drip irrigation field micro-environment winter wheat

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