岭南黄鸡不同配套系种蛋孵化失重率比较

Comparison of hatching weight loss of egg from different parents stocks of Linnan yellow broiler

通过对岭南黄鸡快长型、中速型、慢速型、麻黄、矮脚黄5个配套系父母代种鸡的种蛋孵化失重情况进行比较,评价种蛋孵化失重对孵化成绩的影响。结果表明:在孵化机温度37.8℃、相对湿度56%,出雏机温度36.8℃、相对湿度65%的恒温恒湿孵化条件下,5个配套系种蛋第1~6阶段(每3 d为1个阶段)及0~18 d的平均失重率范围是1.859%±0.047%~2.039%±0.044%、1.584%±0.027%~1.981%±0.056%、1.927%±0.037%~2.266%±0.067%、1.764%±0.053%~2.216%±0.062%、1.865%±0.036%~2.259%±0.059%、1.849%±0.057%~2.271%±0.064%、10.571%±0.176%~12.296%±0.301%。配套系和蛋重区间相同,孵化阶段只在部分情况下对失重率有显著影响,其中第2阶段的失重率显著偏低;孵化阶段相同,配套系内不同蛋重区间的失重率仅慢速型最小蛋与小、较小蛋存在显著差异,其他配套系的蛋重对失重率影响不显著,4个配套系种蛋的18 d失重率趋势是大蛋失重率小,小蛋失重率大,而矮脚黄的情况正好与之相反;孵化阶段和蛋重区间相同,配套系对孵化0~18 d失重率的影响不显著。

This study was conducted to compare the hatching weight loss of yellow chicken eggs among the five parents stocks.The eggs from five parents stocks of Linnan yellow broiler(rapid growth,middle growth,slow growth,mahuang,aijiaohuang) were used in this experiment.The results showed that the average range of weight loss from the five parents stocks at 1-6 stages(3 days as one stage) and 0-18 days was 1.859%±0.047-2.039%±0.044%,1.584%±0.027-1.981%±0.056%,1.927%±0.037-2.266%±0.067%,1.764%±0.053-2.216%±0.062%,1.865%±0.036-2.259%±0.059%,1.849%±0.057-2.271%±0.064%,10.571%±0.176-12.296%±0.301% under the following conditions : the temperature of incubator and hatchertray machine was 37.8℃ and 36.8℃ respectively,the relative humidity of incubator and hatchertray machine was 56% and 65% respectively.In the same stocks and egg weight range,the incubation stage only affect weight loss rate in some cases and the weight loss rate of the second stage was significantly lower.In the same stocks and hatch stage but different egg weight ranges,the weight loss rate of slow growth type was different among the smallest,the smaller,the relative smaller eggs,others were not different.In addition,the egg weight loss rate of 0-18 days decreased with egg weight increasing of 4 stocks while the yellow dwarf chicken was opposite.In the same hatch stage and egg weight range,the effect of stock on weight loss rate in 0-18 days was not significant.