lethal equivalent

To study the lethal equivalent of New Langshan Chicken, we collected the data of hatch rate at first check time, death rate in hatching time, and mortality after hatching.

研究以新狼山鸡12个世代的入孵头照白蛋率、孵化期死亡率、育雏期死亡率和育成期死亡率为基础材料，作为探讨新狼山鸡死亡当量的依据。

The results showed the lethal equivalent was only 0.24%, less than some other breeds. This demonstrated that after several generations by inbreeding its characters were hold.

结果表明，新狼山鸡的死亡当量仅为0.24%，与其它一些品种比较相对较小，说明虽经多个世代的缓慢近交繁育但未发生性状的衰退，在生产中可以大规模扩繁加以合理利用。

Initial Study on the Lethal Equivalent of New Langshan Chicken

新狼山鸡死亡当量的初步研究