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A theoretical framework for long-term N deposition promoting root exudation and rhizosphere P cycling in primary tropical forests. Results showed that plants evolved an active adaptation mechanism under chronic high N addition: (i) increased root C exudation rate to stimulate microbial phosphatase activity and accelerated organic P mineralization; (ii) enhanced the release of organic acids to promote the dissolution of mineral-bound P. More importantly, the organic acid pathway played a dominant role, driving approximately twice as much P release as the phosphatase pathway.
Credit
Xiaomin Zhu, Ziliang Zhang, Benjamin L. Turner, Weibin Chen, Qinggong Mao, Andi Li, Jiangming Mo, and Xiankai Lu
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