不同代谢能和粗蛋白质水平对合浦鹅日粮养分消化率及生长性能的影响(英文)

Effects of Different Dietary Metabolizable Energy and Crude Protein Levels on Nutrient Digestibility and Growth Performance in Hepu Geese

本文旨在研究日粮不同代谢能和粗蛋白质水平对合浦鹅日粮干物质、粗蛋白质、粗脂肪、粗纤维、钙和磷等养分的消化率及生长性能的影响。将120只28日龄的合浦鹅随机分成6个组,进行2个饲养和消化试验:试验1组饲喂粗蛋白质水平为15.10%,代谢能水平分别为10.03、11.00和11.85 MJ/kg的3种日粮;试验2组饲喂代谢能水平为11.50 MJ/kg,粗蛋白质水平分别为12.50%、14.85%和17.83%的3种日粮。用4 mol/L HCl AIA方法测定日粮的养分消化率。结果表明:粗蛋白质水平为15.10%和代谢能水平为10.03 MJ/kg的日粮,具有较高的养分消化率,但不同代谢能水平对试鹅的生长性能影响差异不显著(P>0.05);代谢能水平为11.50 MJ/kg和粗蛋白质水平为12.50%的日粮也具有较高的养分消化率,但不同粗蛋白质水平对试鹅的生长性能影响差异也不显著(P>0.05)。因此,28日龄以后的合浦鹅的日粮粗蛋白质和代谢能水平分别为15.10%和10.03 MJ/kg,或分别为12.50%和11.50 MJ/kg时,均具有较高的养分消化率,但对合浦鹅的生长性能无显著影响。

The objective of this study was to investigate the effects of different dietary metabolizable energy （ME） and crude protein （CP） levels on the digestibility of dry matter, CP, ether extract, crude fiber, calcium, phosphorus and growth performance in Hepu geese at 28 days of age. Two feeding and digestion trials were conducted with 120 Hepu geese; three diets with the same CP level （15.10%） and different ME levels （10.03, 11.00 and 11.85 MJ/kg） were fed to the geese in trial 1, the other three diets with the same ME level （11.50 MJ/kg） and different CP levels （12.50%, 14.85% and 17.83%） were fed to the geese in trial 2; 4 mol/L HCl acid insoluble ash method was used for determination of nutrient digestibility. Results showed that the diet with 10.03 MJ/kg ME and 15.10% CP got good nutrient digestibility, and no significant difference of performance was found among different ME levels （P〉0.05） ; the diet with 12.50% CP and 11.50 MJ/kg ME also got good nutrient digestibility, and no significant difference of performance was found among different CP levels （P〉0.05）. Therefore, good nutrient digestibility was obtained in both of the diet with 15.10% CP and 10.03 MJ/kg ME or the diet with 12.50% CP and 11.50 MJ/kg ME, and there was no difference in growth performance of Hepu geese after 28 days of age.