Variation of Soil Nutrient Content and pH Value under Picea crassifolia Forest in the Pailugou Drainage Basin in the Qilian Mountains
LIU Xian-De, ZHAO Wei-Jun, ZHANG Xue-Long, JING Wen-Mao, FAN Li-Mei
干旱区研究 . 2013, (6): 1013 -1020 .