浦东新区设施土壤次生盐渍化机理探讨

Research on secondary salinization of greenhouse soils in Pudong New Area

在传统研究的基础上引入NO3-和H2PO4-两个指标,探讨了设施土壤次生盐渍化机理。研究表明:土壤酸化和NO3-、H2PO4-、K+的明显积累是设施土壤次生盐渍化区别于内陆、滨海原生态盐渍化的4个表观特征指标,减少设施土壤养分过剩性积累是遏制设施土壤次生盐渍化的重要措施。

The secondary salinization of greenhouse soils was studied in terms ot two indicators of NO3^- and H2PO4^- based on the traditional research. The research indicated that soil acidification and significant accumulations of NO3^- , H2PO4^- and K^＋ in greenhouse soils are the four apparent characteristic indexes which differentiate the primary salinization of inland soils from that of coastal soils, and reducing excess nutrient accumulation in greenhouse soils is an important measure to inhibit the greenhouse soils from secondary salinization.