上海市奉贤区设施菜地土壤盐渍化研究  

Study on the secondary salinization of soil in protected vegetable cultivation in Fengxian area of Shanghai

作　　者：朱萍[1] 顾艾节 周士良[1] 夏伟[1] 李栋[1] 徐英[1] 

机构地区：[1]上海市奉贤区农业技术推广中心,上海201400

出　　处：《上海农业学报》2014年第2期100-103,共4页Acta Agriculturae Shanghai

基　　金：上海市奉贤区科委项目(20100104)资助

摘　　要：研究了奉贤地区不同种植年限及不同剖面深度的设施菜地土壤盐分动态特征。结果表明:因化肥使用过量或不当,设施菜地在建棚第二年即出现盐渍化;土壤水溶性盐离子组成从建棚初期以HCO_3^-为主转变为以NO_3^-为主,且土壤含盐量与NO_3^-、SO_4^(2-)、Ca^(2+)、Mg^(2+)呈极高的正相关;土壤含盐量在垂直剖面上呈表聚性,土壤含盐量在0~10 cm土层变异较大、20~60 cm土层变异趋小,说明土壤次生盐渍化形成过程与耕作施肥等人为控制因素密切相关。The soil salinity variations in protected investigated in Fengxian area. The results showed that fertilizer could cause the secondary salinization of soil vegetable cultivation for different years were excessive or improper application of chemical in the second year of greenhouse culture ; The composition of soil water-soluble salt was mainly HC03 at the initial stage and NO3 at the later stage, and there were significant positive correlations of soil salt content to NO3 ,SO4^2- ,Ca2＋ and Mg2＋ ;The saltwas accumulated largely in surface soil, and the salt content variation was larger in the soil 0 - 10 cm deep and less in the soil 20 - 60 cm deep. From the above results it was concluded that the secondary salinization of soil was closely related to artificial fertilization and cultivation.

关 键 词：菜地 温室栽培 次生盐化 土壤盐渍度 

分 类 号：S606[农业科学—园艺学]