Intraspecific underplanting enhances rhizospheric phosphorus availability in subtropical Chinese fir plantations: implications for sustainable forest management. - Li, Ming; Lian, Pingping; Zhang, Xinyu; Ma, Junjiao; Jiang, Yuhui; Sun, Yangyang; Cheng, Shundan; Hu, Xia; Wu, Pengfei; Fan, Shuisheng (Journal of Plant Ecology, 2026)