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. 2020 Aug 21;11:1948. doi: 10.3389/fmicb.2020.01948

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Copyright © 2020 Ren, Wang, Ye, Zhao, Huang, Fu and Chu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relationships between the dominant soil bacteria and environmental factors. N₀-1, N₀-5, and N₀-10 represent the first, fifth, and 10th year of the 0 kg N hm^–2 treatment, respectively. A similar notation has been used for the other fertilizer treatments. X and Y are the environmental factors and species, respectively, and the correlation R-value and P-value are obtained by calculation. The R-value is shown in different colors in the figure. If the P-value is < 0.05, it is marked with an asterisk. The legend on the right is the color interval of the different R-values. Cluster trees of the species and environmental factors are presented on the left and upper parts. *0.01 < P ≤ 0.05; **0.001 < P ≤ 0.01; ***P ≤ 0.001.