Nitrogen removal and nitrogen-transformation bacteria in Cyperus alternifolius constructed wetland Effects of different conservation tillage on amount and distribution of soil ammonifying bacteria, nitrobacteria and nitrogen-fixing bacteria Response of the N-Cycling Associated Soil Microorganism to Simulated N Deposition in a Plantation of Cunninghamia lanceolata Identification of a new heterotrophic nitrobacterium strain Colloidessp. JZ1-1 and its nitrifying capability. Characteristics of physiological groups of soil nitrogen-transforming microbes in different vegetation types in the Loess Gully region, China Impact of temperature and rainfall on soil nitrification intensity in the middle subtropical region