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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (32): 252-256.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

微咸水淋洗重壤质滨海盐土的盐分变化研究

廉晓娟 李明悦 王艳 张余良 王立艳 王正祥   

  • 收稿日期:2011-04-20 修回日期:2011-08-04 出版日期:2011-12-15 发布日期:2011-12-15

Variation in Salt Content of Heavily-textured Coastal Saline Soils Leached by Brackish Water

  • Received:2011-04-20 Revised:2011-08-04 Online:2011-12-15 Published:2011-12-15

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摘要：

为了节约淡水资源，合理开发利用微咸水代替淡水来改良盐碱地土壤，本研究采用野外小区试验的方法，对不同灌水条件下滨海盐土土壤的脱盐效果进行分析。结果表明，在良好的排水条件下，采用矿化度约3.5 g/L的微咸水淋洗滨海盐土，能使土壤迅速脱盐，脱盐效果明显。综合节水和脱盐效果双重考虑，微咸水淋洗重壤质滨海盐土，以淋洗量1200 m3/hm2，连续淋洗3次为适宜的淋洗方式，能使0~60 cm土壤剖面的全盐量降低到3 g/kg以下，脱盐率达60%以上，土壤盐分含量达到一般绿化植物的生长要求。

关键词: 红壤, 红壤, 长期施肥, 土壤微生物

Abstract:

In order to save fresh water resource, it is necessary to explore and utilize reasonably brackish water replacing fresh water to improve saline soils, the author investigated the desalination effect of heavily-textured coastal saline soils leached by brackish water in field plot experiment. The results showed that, in the well drained soils, using the brackish water with salinity of 3.5 g/L could lead to a fast and mark desalination effect. Taking saving water and desalination effect into account, the author suggested that an optimal leaching method was to sequentially leaching soil for three times with 1200 m3/hm2 brackish water. This method could decrease total salt content of soil (0-60 cm) to 3 g/kg and even below, make the desalination ratio to 60%, so that soil salt content met the requirement of common landscape plants.