Curve Fitting Analysis of Egg Production Rate and Accumulative Number of Egg Laying of Qianhua Black-bone Chickens

• Xiaomeng MIAO, 
• Jia LIU, 
• Yi LI, 
• Yulong FENG, 
• Yinglin LIANG, 
• Hongshu LI, 
• Jigao TANG, 
• Xue HAN