Effect of harvest periods on field productive performance and in vitro digestibility of sweet sorghum

• JI Fangcai, 
• WANG Yifan, 
• ZHANG Hongrui, 
• LIU Yiting, 
• YUAN Mingwei, 
• CHEN Xue, 
• SUN Zhiqiang, 
• KOU Qifang, 
• Yuzhu