At present, there are some ecotoxicological endpoints for assessing the risk in soil microbial process, including soil biomass, soil respiration, enzyme activity, nitrification and N fixation etc.

• 目前评价重金属对土壤微生物生态风险的终点指标主要有土壤生物量、土壤呼吸、酶活性、硝化作用和固氮等。