Effect of arbuscular mycorrhizal fungi on ecological stoichiometry characteristics of alfalfa under different water conditions

• Li-xiang Guo, 
• Jie-yu Yang, 
• Ming-xiu Long, 
• Wen-xue Ma, 
• Jia-ming Yue, 
• Jie Liu, 
• Lin Zang, 
• Tian-ming Hu, 
• Shu-bin He