| 引用本文: | 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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| 摘要: |
| 为了研究暗管排水对南疆盐碱地改良效果，在南疆高水位盐渍化棉田开展了两年暗管排水改良试验，研究了滴灌条件下暗管排水不同间距与埋深对土壤盐分分布及脱盐率的影响，分析了灌溉淋洗定额对土壤盐渍化程度及暗管排水参数的响应，探讨了适宜南疆高水位盐渍化棉田的暗管排水技术参数，结果表明：南疆高水位膜下滴灌棉田无排水时，生育期内灌水对土壤盐分淋洗效果不明显；暗管排水条件下，灌水对土壤盐分具有一定的淋洗作用，土壤淋洗脱盐率分布在10%-30%间；土壤盐渍化程度越高，盐分淋洗潜力越大，在暗管排水参数与灌水量一致的条件下，灌水淋洗脱盐效果也会更佳；土壤淋洗效果一致的条件下，暗管排水间距增加，灌水定额增量呈倍数增长；暗管排水间距与埋深减小时，土壤淋洗脱盐率与淋洗效果均提高。南疆高水位膜下滴灌棉田暗管排水参数建议为间距10 m、埋深0.8 m。 |
| 关键词: 暗管排水；盐分淋洗；滴灌；盐渍土；盐分淋洗曲线 |
| DOI： |
| 分类号:S156.4 |
| 基金项目: |
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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 |
