【摘要】 试验用 43 2只伊莎褐商品蛋鸡 ,研究了三个不同能量采食水平日粮对生长、性成熟的影响。试验得出在 7～ 9,10～ 12 ,13～ 15 ,16～ 18周内 ,高能量采食水平组鸡比中、低能量采食水平组鸡的日增重高 2 .5 2 %、5 .43 %(P <0 0 5 ) ,3 .3 3 %、16.5 9%(P <0 .0 1) ,8.1%、12 .9%(P <0 .0 1) ,2 3 .6%、45 .1%(P <0 .0 1) ,各期日增重差异显著 ;饲料转化效率在 7～ 9周高能采食水平组比中、低能量采食水平组高 4.5 %、6.0 %(P <0 .0 5 ) ,在 10～ 12周高能组比中、低能组高5 79%、10 .93 %(P <0 .0 1) ,在 16～ 18周高、低能组比中能组鸡高 2 3 .4%、3 9.2 %(P <0 .0 1)。全期体重随能量采食水平增加而增加。高、中能量采食水平组鸡达 5 %产蛋率日龄比低能组分别提前 14和 12 .4d(P <0 .0 5 ) ,高、中能组鸡达5 0 %产蛋率的时间比低能组早 6.2d、5 .8d(P <0 .0 1)。表明生长期能量采食水平高的鸡 ,日增重多 ,体重增加的快、;体重大的鸡 ,开产早 ,性成熟也早更多还原

【Abstract】 Effects of dietary energy levels and main ingredients,corn and soybean meal in rearing diets on pullet development and subsequent layer performance were studied using 432 brown Yisha pullets of a connercial strain. During the growing period of 7～12 weeks ,each meal was assigned to three energy levels of 12.89,11.72 or 10.54 MJ/kgME diet containing CP 15%,then changed to 13.10,11.92 or 10.75 MJ/kgME with CP 14% from 13～18 weeks.At the end of 18 wk, half of the pullet within each rearing treatments were fed a layer diet containing 11.09 MJ/kgME,whereas the other half were fed a layer diet containing 11.30 MJ/kgME.High ditary energy intake increased significantly body weight,feed conversion efficiency,during weeks 7 through 12, weeks 13 through 18, respetively.Treatment of high energy intake levels made the pullet matured early.更多还原