Fig. 6From: Straw mulching and nitrogen application altered ammonia oxidizers communities and improved soil quality in the alkaline purple soil of southwest ChinaNeighbor-joining trees based on partial archaeal amoA genes (a) and bacterial amoA genes (b). Names of sequences obtained in this study are marked in bold, the numbers in parenthesizes are their respective T-RF sizes belonging to the OTU. Bootstrap analysis of 1000 replicates values are shown next to each nodeBack to article page