| Cite this article: | 杨玉辉,周新国,李东伟.暗管排水对南疆高水位膜下滴灌棉田淋洗效果研究[J].灌溉排水学报,0,():-. |
| YANG Yuhui,ZHOU Xinguo,LI Dongwei.暗管排水对南疆高水位膜下滴灌棉田淋洗效果研究[J].灌溉排水学报,0,():-. |
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| Study on the leaching effect of subsurface drainage on high groundwater level cotton field with Drip irrigation under mulch in southern Xinjiang |
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YANG Yuhui, ZHOU Xinguo, LI Dongwei
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.Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences,xinxiang
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| Abstract: |
| In order to study the improvement effect of subsurface drainage on saline soil,a two-year experiment of subsurface drainage improvement was carried out in high groundwater level cotton fields in southern Xinjiang.The effects of different spacing and depth of subsurface drainage on soil salt distribution and desalination rate under drip irrigation were studied,the response of irrigation quota to soil salinization and subsurface drainage parameters was analyzed,the technical parameters of subsurface drainage suitable for high groundwater level salinized cotton field in southern Xinjiang were discussed.The results show that:when there is no drainage, the effect of irrigation on soil salt leaching is not obvious.Under the condition of subsurface drainage,irrigation has a certain leaching effect on soil salinity,the desalting rate of soil was 10% - 30%.The higher the degree of soil salinization, the greater the potential of salt leaching.Under the condition of the same drainage parameters and Irrigation quota,the effect of irrigation leaching desalination will be better.Under the condition of the same soil leaching effect,with the increase of drainage distance,the increment of irrigation quota increased by multiple.The desalination rate and leaching effect of soil increased with the decrease of subsurface drainage spacing and depth.It is suggested that the drainage parameters of subsurface pipes should be 10 m in spacing and 0.8 m in depth. |
| Key words: subsurface drainage,Salt leaching, Drip irrigation, saline soil, Salt leaching curve |
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