Analysis of functional diversity of soil microbial communities under different cultivation patterns at different growth stages of maize Effects of sugarcane and maize intercropping on sugarcane rhizosphere microbe metabolic function diversity Effects of organic matters on metabolic functional diversity of soil microbial community under pot incubation conditions Functional Diversity of Rhizosphere Microbial Community of Different Vegetation Types in the Hilly-gully Region of Loess Plateau