Fig. 5From: Straw mulching and nitrogen application altered ammonia oxidizers communities and improved soil quality in the alkaline purple soil of southwest ChinaPrincipal Component Analysis of ammonia oxidation archaeal (a) and bacterial (c) community and the relative abundance of T-RFs for ammonia oxidation archaeal (b) and bacterial (d) in different treatments. Data were mean ± S.D. 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