| 王少丽,许 迪,杨建国,万树星.宁夏银北灌区排水沟水的化学特征及其灌溉效应[J].水利学报,2011,42(2): |
| 宁夏银北灌区排水沟水的化学特征及其灌溉效应 |
| Chemical characteristics and its irrigation effect of drainage water in ditchesof Yinbei Irrigation Districts |
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| DOI： |
| 中文关键词: 沟水灌溉 矿化度 盐渍化 化学特征 |
| 英文关键词: Drainage reuse for irrigation Mineralization Saline-alkaline Chemical characteristics |
| 基金项目: |
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| 中文摘要: |
| 摘要：以宁夏银北灌区5个沟水利用点为例，分析评价排水沟水的化学特征、沟水灌溉的盐渍化风险及灌溉后的
土壤环境效应。分析表明，暖泉农场排水沟水为重碳酸盐钠型水，其它均为氯化物钠型水。灌溉中后期排水沟水
各项盐渍化指标明显小于灌溉初期，除前进农场外，沟水灌溉的盐渍化危害程度较轻。土壤中盐类主要成分为
钠、钙的氯化物一硫酸盐；土壤质地对灌后的盐渍化有明显影响，质地较轻的沙壤土不易积盐；长期淹灌种植水
稻，地下水位较高，为保持土壤性状良好，宜改为水旱轮作方式。采用与耐盐作物轮作、引山洪水冲洗及实行水
旱轮作等，能 |
| 英文摘要: |
| Abstract：This paper analyzed the chemical characteristics of drainage water in ditches，saline-alkaline hazard and its impact of drainage reuse on soil in Yinbei irrigation districts，Ningxia. The result showed that the hydro-chemical type of drainage water is CNa at the Nuanquan Farm and ClNa at other four plots. Every alkaline index in drainage water was obviously smaller during the middle-late irrigation than those during the early irrigation. Except for the Qianjin Farm，the saline-alkaline hazard of drainage reuse for irrigation was relatively slight. The dominant soluble salt in soil was Chloride-sulfate bearing sodium and calcium.The soil texture had an obvious impact on soil saline-alkaline after irrigation. The lightly textured soil，such as sandy loam，was not easy to accumulate the salt. In the area where the rice was planted for a long term，the groundwater level was higher and the better choice was to adopt the paddy-upland rotation system in order to maintain the effect of soil improvement. Adopting rotation system with anti-saline crops，soil flushing with fresh water，paddy-upland rotation and so on would play an important role in controlling soil water-salt and improving the soil and the effects of drainage reuse for irrigation were good. |
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