The nitrogen cycle and factors affecting it in the belowground ecosystem

• Kai Zeng, 
• Lin Liu, 
• Yi-min Cai, 
• You-jun Chen, 
• Dong-ming Chen, 
• Fei-da
  Sun, 
• Shu-ting Pei, 
• Chun-mei Zhou, 
• Xu-dong Shen