【摘要】 用1日龄Hubbard肉用仔鸡,喂给缺硒日粮,比较在不同蛋白水平下,仔鸡生长及死亡的差别。试验分五个组,三个缺硒组(含硒0.01ppm),每组24只鸡。两个补硒组(0.15ppm),每组16只鸡。基础日粮用黑龙江省产的低硒玉米(0.003ppm)和豆饼(0.017ppm)配成。日粮的蛋白水平用豆饼和玉米的百分比不同来调正。三个缺硒组的蛋白水平分别为22.8、19.3及15.8％。补硒的两个组各为19.3和15.8％。试验期30天。结果表明,缺硒高蛋白组仔鸡开始死亡日龄早,并且死亡率高。蛋白水平为22.8％和19.3％的两组,仔鸡从17日龄开始死亡,而15.8％蛋白组从24日龄才开始死亡。三个组24日龄的死亡率分别为79,58,及21％。在30日龄试验结束时,死亡率分别为96、92及67％。蛋白水平不同,仔鸡增重有明显差别。蛋白水平为22.8％和19.3％的两组仔鸡,10日龄的平均增重比15.8％蛋白组分别提高54％和45％(P<0.01)。仔鸡的血、肝、胰、肌肉的含硒量及全血谷胱甘肽过氧化物酶活性随日粮补硒而提高。更多还原

【Abstract】 Five groups of day-old Hubbard chicks were used to compare the effect of different levels of protein in a practically selenium-deficient diet on the growth and mortality of chicks. The experiment lasted 30 days. In the three Se-deficient diets(0.01ppm ) , the protein levels ware a d-justcd to 22.8%, 19.3%, and 15.8% respectively by varying the percentage of corn and soybean meal. The protein levels of the two Se-supplemented diets ( 0.15ppm ) were 19.3% and 15.8%. On day 17, exudative diathesis ( ED ) was observed and deaths were seen in the Se-deficient high protein ( 22.8% ) group, whereas in the Se-deficient low protein ( 15. 8% ) group no death was seen until day 24. Mortality of the high, medium and low protein groups were 79%, 58%, 21% and 96%,92%, 67% on day 24 and clay 30 respectively.The growth rates were in general better for the chicks fed with the higher protein diets. Exudative diathesis was not observed and no chicks died in the Se-supplemented groups.更多还原