Figure 4 | Scientific Reports

Figure 4

From: Ammonia oxidizing archaea and bacteria respond to different manure application rates during organic vegetable cultivation in Northwest China

Figure 4

Neighbor-joining phylogenetic tree and community distributions of AOB amoA gene sequences from organic vegetable fields under different manure application rates. Bootstrap values > 50% based on 1000 replicates are shown next to each branch, and the scale bar represents a divergence of 0.02 nucleic acid sequences. Each OTU relative proportion value is color-coded in the corresponding heat map legends. M0: without manure application; M1: 300 kgN ha−1 annual manure application; M2: 600 kgN ha−1 annual manure application; M3: 900 kgN ha−1 annual manure application; M4: 1200 kgN ha−1 annual manure application.

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