| Cite this article: | 曹振玺,李勇,申孝军.不同灌水技术参数对农田水盐运动的影响*[J].灌溉排水学报,0,():-. |
| CAO Zhenxi,LI Yong,SHEN Xiaojun.不同灌水技术参数对农田水盐运动的影响*[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of Different Irrigation Technical Parameters on Water and Salt Movement in Farmland |
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CAO Zhenxi1, LI Yong2, SHEN Xiaojun1
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1.Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences/ Key Laboratory of Crop Water Use and Regulation,Ministry of Agriculture,Xinxiang Henan;2.College of Water Conservancy and Architectural Engineering,Tarim University,Alaer Xinjiang
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| Abstract: |
| 【Objective】 To explore the suitable irrigation index for efficient salt washing under drip irrigation. 【Method】 The effects of dripper flow rate (2.8 and 5.6 l.h-1) and irrigation quota (22.5, 37.5 and 52.5 mm) on salt leaching in saline-alkali soil roots were studied through artificial water control experiments. 【Result】 Under the same irrigation quota, the radius of wetting front increases with the increase of emitter discharge. With the increase of dripper discharge, the distribution of soil moisture was broad and shallow, and the surface soil moisture content gradually increased. Under the same emitter discharge, the radius of wetting front increases with the increase of irrigation quota. Soil moisture content increases with the increase of irrigation quota. Soil salinity decreases with the increase of emitter discharge and irrigation quota. The desalination rate (in 50 cm soil layer) increases with the increase of irrigation emitter discharge and irrigation quota, and the desalination effect near the root zone is obvious. 【Conclusion】 When the dripper discharge is 5.6 l.h-1 and the irrigation quota is 52.5 mm, the salt washing effect is the best, which can be used as an appropriate irrigation technical parameter. |
| Key words: Irrigation index; Drip irrigation; Water salt movement; Desalination effect |
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