Variation regularity of stoichiometric characteristics of soil microbial biomass C, N, and P along the altitudinal gradient and their influencing factors in Helan Mountains

• WANG Siyao, 
• WANG Yujuan, 
• QIU Kaiyang, 
• LI Xiaocong, 
• QIU Aizhen, 
• ZHU Yachao, 
• ZHANG Shuo, 
• SI Haoyu, 
• ZHANG Yanqing, 
• FENG Jialin, 
• FENG Zhanrong, 
• FENG Shaolei