Effects of supplementation on performance and blood biochemical index of grazing reserve ewes in the cold season

• ZHANG Zhijun, 
• GUO Tongjun, 
• Abuxiaheman·Mubarak, 
• Guzalnur·Amat, 
• QIN Rongyan, 
• Bayinbate, 
• WANG Chengmin, 
• YAN Jun, 
• WANG Wenqi