【摘要】 为研究盐碱地开发整治工程对盐渍化土壤的改良效果,以黄骅市盐碱地开发项目区作为研究对象,分析了盐碱地开发工程前、明沟排水工程和暗管排水工程土壤中速效磷、速效钾、碱解氮、容重、有机质含量、含盐量、pH值、和含水量等指标的差异。并建立土壤肥力综合评价体系,采用模糊数学综合评价方法对土壤肥力进行评价。结果表明:明沟排水工程对土壤中速效磷、速效钾、碱解氮和有机质含量的影响高于暗管排水工程,而暗管排水工程对于降低土壤盐渍化程度效果显著,降低速度快。经过明沟和暗管排水工程实施后土壤肥力综合指数分别从0.1330、0.2200增加到0.7440、0.6807,明沟排水较暗管排水工程的土壤肥力综合评价分高出23.29%。总体来说,明沟和暗管排水工程均能有效改良土壤,明沟与暗管排水工程相比实施后的效果更好,且暗管排水工程对含盐量的改良效果更好。更多还原

【Abstract】 The differences in available phosphorus(AP), available potassium(AK), alkali nitrogen(AN), bulk density(BD), organic matter(OM) content, salt content, p H value and water content in the soil were analyzed before the development of saline-alkali soil and in the projects of open drain and underground pipe drainage in the development area of saline-alkali soil, in order to investigate the improvement effect for the development and remediation of saline-alkali soil. A comprehensive evaluation system of soil fertility was established by fuzzy mathematics comprehensive evaluation method. The effect of open drain drainage on the contents of AP, AK, AN and OM in soil was higher than that of underground pipe drainage. The underground pipe drainage had a significant effect on reducing the degree of soil salinization. After the open drain and underground pipe drainage, the soil fertility index increased from 0.1330 and 0.2200 to 0.7440 and 0.6807, respectively. In general, both the open drain and the underground pipe drainage could effectively improve the soil fertility, and the later has a better effect on reducing soil salt content.更多还原