Evaluation of the nutritional value of silage from stems and leaves of different Jerusalem artichoke varieties in an alpine region

• Qi Yan, 
• Shi-ting Zhang, 
• Chang-ming Zhao, 
• Pei-pei Liu, 
• Jiao-jiao Zhang, 
• Yue-hua Wang, 
• Hai-yan Wei, 
• Xian-ju Wang, 
• Shi-qi Lyu, 
• Lu-ming Ding