保护地土壤次生盐渍化的时空变异特征及对策

土壤次生盐渍化是我国保护地栽培生产中的一个重要限制因子。应用Arc／info软件对冀东山麓平原保护地土壤含盐量化验数据进行空间插值，分析保护地土壤次生盐渍化的时空变异特征；论述保护地土壤次生盐渍化的成因，证明土壤环境封闭、大量盲目施肥、不合理灌溉是导致保护地土壤次生盐渍化的主要原因。指出通过测土配方施肥、增施有机肥、合理灌溉和换客土等措施，实施保护地水肥资源综合管理，调节土壤生态环境是防止保护地土壤次生盐渍化的有效途径。

The Character of the Temporal and Spatial Variation of Secondary Salinization of Protected Soil Cultivation Measures

Secondary salinization of protected soil cultivation in our country is the important limiting factor of production. The Arc / info software was applied, which made soil salinity laboratory data of Jidong piedmont plain protected soil spatial interpolated. The character of the temporal and spatial variation of secondary salinization of soil cultivation in Jidong piedmont plain protected soil＇was analyzed. The causes of protected soil salinization and characteristics were discussed; the results showed that the closed soil environment, a large number of blind irrational fertilization and unreasonable irrigation resulted in soil secondary salinization. And the results indicated that fertilization soil testing, increased application of organic fertilizer, reasonable irrigation and covering with other soil for melioration could integrate the water with fertilizer resources. So regulating soil eco-environment is the effective way to prevent secondary salinization.