长江河口地区土壤水盐动态特点与区域土壤水盐调控研究

河口地区土壤水盐动态有丰水年份春秋季土壤积盐、枯水年份夏季土壤积盐的季节性特点,且各季节积盐的机理也不同。分析研究了河口地区不同水文年间不同季节的土壤水盐动态调控指标。分析河口区域土壤盐分的分布状况及近几年来河口区域秋冬季咸潮入侵加重和雨季土壤盐化程度加剧的状况,针对性的开展河口区域不同水文年各季节的土壤水盐调控,采取各种水利措施和农耕措施控制区域土壤水盐状况向有利于土壤改良和提高生产率的方向发展。

Soil Water-salt Dynamics and Regional Soil Water-salt Control in the Yangtze River Estuary

The soil water-salt dynamics in Yangtze river estuary is characterized as that soil salinization is more serious in spring and autumn of wet year, but in summer of dry year. And the mechanisms of soil salinization in different seasons are different. By analysis, the control index of the soil water-salt dynamics in different seasons in wet year and dry year in Yangtze river estuary were investigated. By analyzing the soil salt distribution and the serious status, it was found that the seawater intrusion in autumn and winter and the soil salinization in rainy season were both worsen in the recent few years. The strategies of soil water-salt control in different seasons in different hydrological years in Yangtze river estuary proposed. It is suggested that all kinds of irrigation and cultivation measures should be in the direction of improving soil quality and boosting agricultural productivity.