不同改良措施下灌溉咸水的滨海粘重土壤水盐动态  

Water and Salt Dynamics of Coastal Sticky Soil Irrigated Saltwater under Different Improved Techniques

作　　者：贺宏达[1] 张余良[1] 王正祥[1] 王艳[1] 廉晓娟[1] 

机构地区：[1]天津市农业资源与环境研究所,天津300192

出　　处：《天津农业科学》2012年第5期51-55,共5页Tianjin Agricultural Sciences

基　　金：公益性行业(农业)科研专项(201203003);国家科技支撑计划项目(2009BADA3B03-04)

摘　　要：在天津滨海地区利用田间小区试验研究灌溉咸水后土壤水盐的变化,结果表明,灌溉咸水后表层(0～20cm)土壤水升高,中层土壤(20～40cm)、下层土壤(40～60cm)含水量随灌溉后时间的延长而增加;灌溉咸水后表层土壤含盐量较高,而后逐渐降低,灌溉6个月降到低点后略有上升,中层土壤含盐量变化不大,下层土壤含盐量在后期有所上升;灌溉咸水后各层土壤pH值上升,采用改良技术与不采用改良技术都有同样的变化趋势。Field experiments of soil water and salt dynamics after saltwater irrigation were carried out on coastal area heavy soil in Tianjin.Test results showed that irrigation saltwater increased surface layer （0~20 cm） soil moisture immediately, the middle layer （20~40 cm） soil moisture content and the subsoil （40~60 cm ） moisture content increased with time gradually after irrigation. Salt content of surface soil was higher just after saltwater irrigation than other times, and then gradually decreased, down to a minimum value after 6 months ,salt content of surface soil increased slightly after this low.Middle soil salinity changed little , subsoil salinity increased in the late. The soil pH of all layers increased after irrigation saltwater. pH of the soil adopted salt control technology had the same trend with the soil not adopted salt control technology.

关 键 词：粘重土壤 土壤含水量 土壤含盐量 土壤改良剂 灌溉 咸水 土壤含盐量 

分 类 号：S153[农业科学—土壤学]