以蓖麻(Ricinus communis)盆栽为材料, 通过设置不 同重金属污染处理组(Cd0Zn0, Cd1Zn0, Cd1Zn100, Cd1Zn500, Cd1Zn1000), 研究添加无机肥和菌渣对土壤理化性质的影响, 以探讨将菌渣作为一种土壤改良剂应用到镉和锌复合污染土壤的可行性. 结果表明: 经过 144 h, 添加 5${\%}$ 菌渣的实验组, 其累计水损失量相较于空白对照组减少了 78.6${\%}$, 同时土壤孔隙率提高了 19.7${\%}$; 相较于无机肥添加组, 土壤氧化还原电位提高了 65.5${\%}$$\sim $81.4${\%}$; 此外, 土壤微生物活性提高了 78${\%}$$\sim $126${\%}$. 这表明, 菌渣能够通过提高土壤孔隙率来提高土壤氧化还原电位和土壤的微生物活性, 从而达到改良土壤的目的.

To determine the underlying use of inorganic fertilizer (IF) and spent mushroom substrate (SMS) that can improve chemical and physical properties of Zn/Cd polluted soil, Ricinus communis pot experiments (Cd0Zn0, Cd1Zn0, Cd1Zn100, Cd1Zn500, Cd1Zn1000) were performed. The results show that addition of SMS (5${\%}$) can decrease water loss (78.6${\%}$) and obviously increase soil porosity (19.7${\%}$) compared with the control samples, indicating that SMS can maintain soil moisture and improve permeability. Compared with the addition of inorganic fertilizer, SMS increases oxidation-reduction potential by 65.5${\%}$$\sim$81.4${\%}$, and microbial activity of soil by 78${\%}$$\sim$126${\%}$. That means that SMS can improve nutrient availability and modify the soil condition. Thus, SMS can improve metal polluted soil condition by altering chemical and physical properties of soil.