蛋鸡良种在西藏的适应性试验

Adaptability of Fine Breed Layers in Tibet

将海兰、罗曼两个品种父母代种鸡 ４００多只，引入海拔 ４０４０ ｍ的西藏自治区江孜县进行饲养试验。结果表明，海兰、罗曼均能很好适应高寒缺氧、恶劣多变的气候环境，并基本保持各自的品种特性；母鸡至２２周龄的累计成活率分别达到９３．１％和９０．０％，公鸡成活率达１００％，产蛋期平均蛋重，罗曼６４．７±４．５ ｇ，海兰６１．２±３，７ ｇ，蛋形、蛋壳品质等均正常。

More than 400 parent flocks of Hyline, Romn were introduced into Jiangzi county(4040m above the sea level), Tibet. The result indicated that the two breeds of hyline and Romn could adapt to the local environment of low temperature and oxygen, and kept their breed characters. Thesurvival rates of 22--week-old hens were 93. 1 % and 90. 0% respectively in grand total and cocks 100%. The average egg weight o f Hyline and Romn in laying stage were 61. 213. 7 g and 64. 7±4. 5 g respectively with normal shapes and shells.