Mineral Element Content of Orah Mandarin Grafted on Trifoliate Orange Rootstock in Nanning at Different Phenological Periods

• LI Guoguo, 
• PAN Yifan, 
• CHEN Xiangling, 
• LI Shuang, 
• WANG Xiaoyu, 
• LU Zhen, 
• ZHAO Hongtao, 
• LIU Yongzhong