| 干旱区膜下滴灌下土壤积盐特征研究 |
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| 引用本文： | 杨鹏年,董新光,魏光辉,马亮,刘磊.干旱区膜下滴灌下土壤积盐特征研究[J].土壤通报,2011(2):360-363. |
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| 作者姓名： | 杨鹏年 董新光 魏光辉 马亮 刘磊 |
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| 作者单位： | 新疆农业大学水利与土木工程学院;新疆水利厅; |
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| 基金项目： | 水利部公益项目(200801050); 国家科技支撑计划(2007BAD38B01); 自治区重大科技专项(20073117-1); 新疆水利水电工程重点学科联合资助 |
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| 摘 要： | 主要对膜下滴灌后的土壤盐分分布的特征进行了研究,结果表明:在生长期内,位于90 cm深土层内土体的平均含盐量在上升,出现了一定的积盐。在距地表40 cm深的范围内,则存在盐分定向迁移的现象,其积聚的范围主要分布在湿润区的边缘,其程度则取决于土壤质地、每次灌水量大小及气候等多种因素。经过一个灌溉周期后,土壤积盐区的含盐量可达到初始值的一倍左右。这一结论对干旱气候下膜下滴灌区的冬灌具有一定的实际指导作用,灌区应根据土壤含盐量的大小而决策是否需要冬灌,从而达到减少干旱区农业用水量过大的目标。
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| 关 键 词： | 干旱区 膜下滴灌 土壤盐分 |
Characteristics of Salt Deposition under Drip Irrigation beneath Plastic Film in Arid Area |
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| YANG Peng-nian ,DONG Xin-guang ,WEI Guang-hui ,MA Liang ,LIU Lei.Characteristics of Salt Deposition under Drip Irrigation beneath Plastic Film in Arid Area[J].Chinese Journal of Soil Science,2011(2):360-363. |
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| Authors: | YANG Peng-nian DONG Xin-guang WEI Guang-hui MA Liang LIU Lei |
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| Institution: | YANG Peng-nian 1,DONG Xin-guang 2,WEI Guang-hui 1,MA Liang 1,LIU Lei 1(1.College of Water Conservancy and Civil Engineering,Xinjang Agricultural Unversity,Urumqi 830052,China,2.Xinjiang Water Resources Bureau,Urumqi 830000,China) |
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| Abstract: | The characteristics of salt deposition was tested under drip irrigation beneath plastic film in arid area.The results showed that the soil average salt content increased in column of 0-90 cm.Simultaneously,the soil average salt content in column of 0-40 cm represented the characteristics of directional removing.The range of salt deposition mainly distributed in the brink of wettish area.After growth cycle of crop irrigation,the cumulative amount of soil salt was 2 times than original value.Therefore,the con... |
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| Keywords: | Arid area Drip irrigation under plastic film Soil salt content |
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