Fig. 6From: Combined metagenomics and metabolomic analysis of microbial community structure and metabolic function in continuous soybean cropping soils of Songnen Plain, ChinaHeatmap of abundance of genes related to nitrogen metabolism. The Z-values obtained after normalizing the functional relative abundance for each row are presented as the values corresponding to the middle heatmap. SMR maize–soybean rotation, SC8 8-year soybean continuous cropping, SC2 2-year maize, 2-year soybean rotation croppingBack to article page