中新天津生态城盐渍土特征与绿化技术研究

Characteristics and Afforesting Techniques of Saline Soil in China-Singapore Tianjin Eco-city

为了在中新天津生态城建设稳定高效的绿地生态系统,对区域土壤理化性状进行了调查,并分析了可以采用的盐碱地绿化技术措施。调查分析结果表明,中新生态城起步区土壤质地粘重、剖面层次混乱,结构差;养分贫瘠,有机质和水解氮含量较低,低于10g·kg-1和40mg·kg-1;盐分含量很高,平均含盐量在2%以上;离子组成以Cl-、Na+、SO42-为主,pH值呈弱碱性。适宜采用的绿化技术主要有应用盐生植物绿化、原土改良绿化和客土绿化。

Abstract： The physical and chemical properties of saline soils in first developing area in China-Singapore Tianjin Eco-city were investigated and relevant afforesting techniques were discussed in the paper. The results showed that the soil texture was heavy clay, soil profile was disordered, and soil structure was poor.The soil nutrition was poor, and organic matter and hydrolysis-N content were below g·kg^-1 and 40 mg·kg^-1.The soil salinity content was above 2%, the main salt ions were Cl^-,Na^＋ and SO4^2-, and pH value was weak alkali. According to the conditions, application of halophyte, natural soil reclamation and improvement by soil exchange were appropriate.