摘要
将罗曼蛋鸡商品代种蛋分为小于５５克、５５至６５克、大于６５克三组。按常规入孵，观测三组种蛋的受精率、胚胎发育的“合拢”和“封门”期的时间和比率、出雏率和健雏率等。结果，蛋重在５５至６５克范围的种蛋受精率、出雏率和健雏率均高于其它两组。试验证明，蛋重偏大或偏小对受精率、出雏率及健雏率均有明显的影响。
Roman hens commodity substitute eggs were weighed at random one by one and thendevided into three groups: weighing respectively below 55kg, between 55-65kg and above 65kgand then were hatched under the regular hatching condition. Observations were made of theirinsemination rate, birth rate,health rate and the time and rate of Hcolsell and )'seal up' under thesame condition.The experiment result showed that the abovementioned rates of eggs weighing between 55 65kg are biger than those of the others. and that eggs weight has apparent effect upon theinsemination birth and health rate.
关键词
蛋重
受精率
出雏率
孵化
罗曼蛋鸡
eggs weight enbro temperature close and seal up insemination rate birth rate health rate
