1～21日龄艾维茵肉鸡净能需要量研究

Net Energy Requirement of Avian Broilers Aged from 1 to 21 Days

本试验在实测饲粮玉米和豆粕净能(NE)值的基础上,研究1～21日龄艾维茵肉鸡净能需要量。选用1日龄的艾维茵肉公鸡250只,随机分为5组,每组5个重复,每个重复10只鸡,饲粮净能水平分别为8.97、9.25、9.54、9.83、10.11MJ/kg,考察不同净能水平对1～21日龄艾维茵肉鸡生长性能和氮代谢的影响。结果表明:9.83MJ/kg净能水平组平均日增重(ADG)和料重比(F/G)最佳,极显著优于8.97和9.25MJ/kg净能水平组(P<0.01),显著优于9.54MJ/kg净能水平组(P<0.05),但和10.11MJ/kg净能水平组差异不显著(P>0.05)。氮利用率以9.83MJ/kg净能水平组显著高于其他各组(P<0.01)。分别以ADG和F/G进行回归分析得出,1～21日龄艾维茵肉鸡净能需要量分别为9.88和9.90MJ/kg,平均值为9.89MJ/kg。由此可知,在本试验条件下,1～21日龄艾维茵肉鸡净能需要量为9.89MJ/kg。

The experiment was conduced to study the net energy （NE） requirement of Avian broilers aged from 1 to 21 days based on the measured NE of dietary corn and soybean meal. Two hundred and fifty one-day-old Avian broilers were randomly divided into 5 groups with 5 replicates of 10 broilers in each replicate, with the NE levels of the diets as 8.97, 9.25, 9.54, 9.83 and 10.11 MJ/kg, respectively, to investigate the effect of NE levels on the performance and nitrogen metabolism of Avian broilers aged from 1 to 21 days. The results showed as follows： the ADG and F/G in 9.83 MJ/kg NE group had extremely significant difference with 8.97 and 9.25 MJ/kg NE groups （P0.01）, and had significant difference with 9.54 MJ/kg NE group （P0.05）, but had no difference with 10.11 MJ/kg NE group （P0.05）. The nitrogen availability in 9.83 MJ/kg NE group was significantly higher than that in other groups （P0.01）. According to the regression analysis based on ADG and F/G, the NE requirement of Avian broilers aged from 1 to 21 days was 9.88 and 9.90 MJ/kg, respectively, and the average value was 9.89 MJ/kg. In conclusion, the net energy requirement of Avian broiler aged from 1 to 21 days is 9.89 MJ/kg.