Compared with the four straws in the soil,the m icrobial biomass C of corn straw >millet straw >alfalfa straw >potato straw.This tendency comports with the ratios of C/N in the straws.

• 比较4种秸秆，在腐解的整个过程中土壤微生物量C表现为玉米>谷子>苜蓿>马铃薯，这一趋势与它们的C/N比的大小相一致。