天津临港经济区吹填海湾泥绿化改良技术研究

Studies on Improvement and Afforestation Techniques of Brackish Dredged Sediment in Tianjin Harbor Economic Area

对天津临港工业区吹填海湾泥土壤基本理化性状、绿化改良技术进行了研究,结果表明,吹填海湾泥土壤理化性状空间变异较大,土体中自然或人工侵入体较多;土层含盐量较高,一般在1.0%以上。采用暗管排盐、掺砂、施有机肥、局部换土等综合改良措施能有效改善吹填海湾泥土壤通气透水能力,降低土壤盐分含量,提高土壤肥力;园林植物栽植成活率在92%以上。

In the paper, the properties, improvement and afforestation techniques of brackish dredged sediment in Tianjin harbor economic area were investigated. The results showed that the physical properties of brackish dredged sediment varied clearly at different spots. The salinity content of brackish dredged sediment was above 1.0%, and main salt ions were Cl,Na ＋ ,SO4 2. The brackish dredged sediment could improve greatly by comprehensive measures of mixing with sand, fertilization, irrigation leaching, subsurface drainage. The salinity content dropped and fertility increased greatly after three years ofimprovement activities, and survival rate of garden plant was above 92%.