Planting evaluation of new Rumex varieties introduced from Russia in Heilongjiang Province

• Jing Zhou, 
• Lan-bao He, 
• Yong-qing Xu, 
• Zhen-xue Cai, 
• Fei Li, 
• Yan-qi Li, 
• Yu Miao, 
• Bao-zhong Hu, 
• Feng-lan Li