中捷农场滨海盐碱地立地类型划分及其植被恢复技术

 为了指导滨海盐碱地因地制宜地进行植被恢复,通过野外调查、室内分析测试与因子分析等方法,对中捷农场45块样地的土壤类型、土壤含盐量、地下水位、距海距离、盐分类型、土壤质地、pH值、海拔等因子进行测定与分析。结果表明:影响盐碱地立地类型划分的主导因子为盐渍化土壤形成因子、土壤因子和碱化度因子;对立地类型划分贡献大小的变量依次为距海距离>地下水位>土壤类型>土壤质地>海拔>盐分类型>土壤含盐量>pH值;中捷农场的滨海盐碱地可划分出滨海盐化潮土、滨海盐化草甸土和滨海盐土3类立地类型和11类立地亚型,不同立地类型可以采取不同的植被恢复措施。研究结果可为中捷农场盐碱地造林与植被恢复提供理论依据。

Site classification and vegetation restoration technigue of coastal saline land in the Zhongjie farm

In order to guiding vegetation restoration suited to coastal saline land,45 plots of the Zhongjie farm were selected for field investigation,laboratory analysis testing and factor analysis methods,by which soil type,soil salinity,groundwater levels,distance from the sea,salt type,soil texture,soil compaction,soil organic matter,porosity,pH and altitude were analyzed.The results showed： soil formation factors,soil type and soil salinity were key factors to affect on site classification of coastal saline land.The descending order of variables contribution rate to classifaction were distance from the sea,groundwater levels,soil type,soil texture,altitude,salt type,soil salinity,pH.Three categories of site types including coastal salinized moisture soil,coastal salinized meadow soil and saline soil,and 11 categories of site subtypes were classfied,and the corresponding vegetation restoration technigue was put forward.It may provide a theoretical basis for the restoration of vegetation on saline-alkali land in the Zhongjie farm.