The impact of biochar on the activities of soil nutrients acquisition enzymes is potentially controlled by the pyrolysis temperature: A meta-analysis

•Biochar produced at < 500 ℃ pyrolysis temperature triggers soil enzymes.•Biochar produced ≥ 500 ℃ shows negligible impact on soil enzymes response.•Soil and biochar characteristics play secondary roles in the effects of biochar on soil enzymes activities.