Accumulation of humic acid and fulvic acid during root humification of three diameters of two dominant subalpine trees in western Sichuan, China
LIU Qun, ZHUANG Li-Yan, YANG Wan-Qin, NI Xiang-Yin, LI Ting-Ting, XU Zhen-Feng
Chin J Plant Ecol . 2017, (12): 1251 -1261 .  DOI: 10.17521/cjpe.2017.0169