The stoichiometric characteristics of Xanthium italicum with different invasive degrees in the Yili valley

• LIU Xuan, 
• CUI Dong, 
• LIU Wenxin, 
• ZHAO Yang, 
• Erfan ·Akberjan, 
• LYU Liqin, 
• WU Yuxin, 
• JIANG Zhicheng, 
• YAN Jiangchao, 
• LI Jin’ge