Fig.7From: Straw mulching and nitrogen application altered ammonia oxidizers communities and improved soil quality in the alkaline purple soil of southwest ChinaRedundancy analysis (RDA) of the correlation of soil properties with AOA community structure (a) and AOB community structure (b). S0N0: No straw mulching with no nitrogen, S0N1: No straw mulching with 120 kg N ha−1, S0N2: No straw mulching with 180 kg N ha−1, S1N0: Straw mulching with no nitrogen, S1N1: Straw mulching with 120 kg N ha−1, S1N2: Straw mulching with 180 kg N ha−1Back to article page