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4 海兰褐蛋鸡产蛋高峰至后期蛋壳超微结构的变化

Table 4 The change of eggshell ultrastructure of Hy-Line Brown laying hens from peak to late phase of production

项目 Items 蛋鸡周龄 Hen age (wk) P 31 41 50 60 70 80 钙化层厚度 Calcified thickness (μm) 357.05±15.78 345.99±13.83 363.50±9.71 356.41±24.60 345.80±13.31 342.91±23.87 0.300 乳突厚度 Mammillary thickness (μm) 90.01c±5.80 106.56b±6.14 114.35b±9.37 114.18b±8.03 125.98a±6.24 130.41a±8.43 <0.001 有效层厚度 Effective thickness (μm) 268.14a±12.91 243.06b±9.77 246.91b±10.18 243.50b±17.63 220.22c±10.25 212.04c±26.74 <0.001 乳突宽度 Mammillary knob width (μm) 70.18±4.27 71.24±6.24 72.27±6.15 72.01±4.10 73.66±7.16 70.93±5.79 0.926 乳突比例 Mammillary layer rate (%) 24.87c±1.67 30.80b±1.46 31.32b±1.78 32.12b±0.85 36.31a±1.35 37.85a±2.08 <0.001 有效层比例 Effective layer rate (%) 75.13a±1.67 69.20b±1.46 68.68b±1.78 68.13b±0.88 63.69c±1.35 62.15c±2.08 <0.001 乳突密度 Mammillary knob density (1 mm2) 286.66a±11.75 268.97ab±17.45 270.96ab±27.20 271.40ab±11.46 256.07b±8.44 230.93c±11.90 0.001