以蓖麻种植土（未处理疏浚原泥（CK1）、大田耕层土（CK2）、盐碱土（CK3）及3种改良疏浚淤泥土（Ⅳ、Ⅴ、Ⅵ））为对象，通过试验，测定种植土的理化性质、蓖麻根系发育及地上生长状况的变化，探讨了不同处理方式对疏浚淤泥改良效果和蓖麻生长的影响。结果表明：3种改良处理均可改善淤泥颗粒结构，降低容重和pH，提高淤泥营养成分含量，处理后的淤泥对蓖麻根系发育及地上生长均有一定的促进作用。综合比较发现，改良疏浚淤泥处理方式Ⅳ对促进蓖麻生长效果最为显著，与耕层土CK2相当。

In order to investigate the effects of different treatment methods on the dredged sludge fertility and castor growth, different experiments were conducted on the castor planting soil (untreated dredged sludge (CK1), cultivation soil (CK2), and saline soils (CK3) and three types of improved dredged sludge soil (Ⅳ, Ⅴ, Ⅵ)), and the variations of planting soil physicochemical properties, castor root development, and growth conditions above ground were evaluated. The results showed that the treatment methods for improving dredged sludge soil can improve the grain structure of sludge, reduce the density and pH, and enhance the nutrition content of sludge, and the modified sludge plays a certain role in promoting the root development and castor growth. Moreover, it was found that the treatment method IV for improving dredged sludge soil is the most effective method to promote the castor growth, which has similar effects as the cultivation soil (CK2).