海兰褐蛋鸡产蛋高峰至后期蛋壳品质的变化特征

马玲玲,冯嘉,王晶,齐广海,马友彪,武书庚,张海军,邱凯

The Changes of Eggshell Quality in the Laying Cycle of Hy-Line Brown Layers

MA LingLing,FENG Jia,WANG Jing,QI GuangHai,MA YouBiao,WU ShuGeng,ZHANG HaiJun,QIU Kai

表5 海兰褐蛋鸡产蛋高峰至后期蛋壳晶粒大小及变异系数

Table 5 Eggshell grain size and coefficient of variation of Hy-Line Brown laying hens from peak to late phase of production

项目 Item 蛋鸡周龄 Hen age (wk) P 31 41 50 60 70 80 晶粒大小 Grain size (μm) 27.35±3.97 26.22±3.31 29.40±2.53 29.08±4.90 25.96±1.71 27.25±3.85 0.229 变异系数 Coefficient of variation 0.14 0.13 0.09 0.17 0.07 0.14 -