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. 2017 Feb 9;8:187. doi: 10.3389/fmicb.2017.00187

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Copyright © 2017 Li, Chen, Zhang, Yin and Huang.

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) or licensor 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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Bacterial community variation between all samples from treatments CK (unfertilized control), NK, NP, LNPK (low rate of N, regular PK), HNPK (high rate of N, regular PK), MNPK (manure plus NPK) and SNPK (straw plus NPK). (A,B) Principal coordinate analysis plots of OTU-based weighted (A) and unweighted (B) UniFrac distances between samples; (C,D) Canonical analysis of principal coordinates (CAP) of weighted (C) and unweighted (D) UniFrac distances quantifying the impacts of edaphic factors on bacterial community structure. CAP was constrained to the factors pH, SOC, TN, AP, and AK while conditioning on all other factors.