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。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3.5g/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1200m3/hm2,连续淋洗3次为适宜的淋洗方式,能使0～60cm土壤剖面的全盐量降低到3g/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。
In order to save fresh water resource,it was 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 m 3 /hm 2 brackish water.This method could decreased 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.
出处
《中国农学通报》
CSCD
北大核心
2011年第32期252-256,共5页
Chinese Agricultural Science Bulletin
基金
国家科技支撑计划项目"滨海盐碱地土壤改良关键技术的研究"(2007BAD67B01)
国家科技支撑计划项目"粮棉果蔬咸水安全高效补灌技术集成研究与示范"(2009BADA3B03)
天津市农业科学院院长基金项目"滨海盐土微咸水灌溉的脱盐效果研究"(07025)
关键词
微咸水
滨海盐土
全盐量
脱盐率
brackish water
coastal saline soils
total salt content
desalination ratio
