期刊名称：Annals of Agricultural and Environmental Medicine
印刷版ISSN：1232-1966
电子版ISSN：1898-2263
出版年度：2017
卷号：24
期号：4
页码：722-725
DOI：10.26444/aaem/80920
出版社：Institute of Agricultural Medicine in Lublin
摘要：Heavy metal contamination of soil occurs when heavy metals are introduced to soil through human activities, leading to thegradual deterioration of the ecology and environment. Microorganism activity reflects the intensity of various biochemicalreactions in soil, and changes in it reflect the level of heavy metal pollution affecting the soil. The effects were studied ofheavy metal Cd on the microbial activity of soil at different concentrations by investigating the respiratory intensity, ureaseactivity, and catalase activity in forest soil and garden soil. The results showed that the respiratory intensity, urease andcatalase activities in the garden soil were all higher than in the forest soil. Cd has obvious inhibitory effects on microbialactivities. The three parameters exhibited a downward trend with increasing concentrations of Cd. Catalase activity increasedwhen the mass concentration of Cd reached 1.0 mg/kg, indicating that low concentrations of Cd can promote the activityof some microorganisms. Respiratory intensity and urease activity also increased when the concentration reached 10.0 mg/kg, showing that respiratory intensity and urease activity have strong response mechanisms to adverse conditions. Theeffective state of Cd in soil, as well as inhibition of microbial activity, decreased with incubation time.
