The hatchability of Miniature Layers and hybrids was investigated and the differences of embryonic, mortality, the ratio of egg water loss, and hatchability at different altitudes were analyzed.

• 观察小型蛋鸡及其与藏鸡杂交种蛋在西藏不同海拔地区的孵化性能，分析高海拔胚胎死亡率、种蛋失水率和孵化率。