《Table 1 Basic information for the 28 studies included in the meta-analysis》

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《整合分析增温和增CO_2对土壤微生物的影响（英文）》

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MAT mean annual temperature；MAP mean annual precipitation.

All 28 studies were grouped according to ecosystem type，which included forest，grassland，shrubland and tundra ecosystems（Table 1）.Experimental durations（i.e.，from the beginning of warming or elevated CO2 treatment to the soil sampling time）were calculated in years.The main warming methods included open top chamber and infrared radiator.There were all-day warming，daytime warming and nighttime warming treatments in different studies.Warming magnitudes ranged from 0.1?C to 4?C（including 23 levels）and mean annual temperatures ranged from–7.3?C to16.3?C.The increased CO2 concentrations ranged from 36ppm to 360 ppm（including 8 levels）.The elevated CO2methods employed in the experiments included regular FACE techniques，greenhouses and open-top chambers.