为了使玉米加工副产品和复合非淀粉多糖酶制剂在畜禽饲料配方中得到精准应用,试验选用56只体重为(2.5±0.2) kg的健康成年黄羽肉公鸡,采用完全随机试验设计,随机分为7组,每组8个重复,每个重复1只鸡,采用绝食强饲法进行3期代谢试验,以单一原料以及其添加复合非淀粉多糖酶为饲粮,测定玉米及其加工副产品添加复合非淀粉多糖酶前后的代谢能及能量代谢率。结果表明:玉米加工副产品的表观代谢能(AME)和真代谢能(TME)除3种玉米蛋白粉和2种玉米糖渣高于玉米外,其他均低于玉米。玉米及其加工副产品的AME和TME预测方程分别为:AME=3.322 1+0.704 2GE-0.521 3CF(R2=0.893 9),TME=25.697 6+0.742 5GE-0.426 2CF-0.252 2DM(R2=0.919 4);加酶后玉米及其加工副产品能量表观代谢率及真代谢率以不喷浆玉米皮最低,玉米蛋白粉 最高。添加非淀粉多糖复合酶后,玉米及其加工副产品能量表观代谢率提高了0.82%～3.32%,能量真代谢率提高了0.78%～3.00%,AME提高了0.82%～3.32%,TME提高了0.98%～2.94%;玉米及其加工副产品AME与TME的有效营养改进值范围均为0.19～0.25 MJ/kg,其中以玉米麸质饲料最高,玉米最低。由此可见,添加复合非淀粉多糖酶能提高玉米及其加工副产品的能量利用率,改善玉米加工副产品的能量效价。
To make the precise application of corn by-products and non-starch polysaccharide (NSP) enzymes in animal feed formulation, 56 healthy adult yellow-feathered roosters with body weight of (2.5±0.2) kg were randomly divided into 7 groups and 8 replicates in each group and 1 rooster in each replicate. Three metabolic test periods were carried out by super-alimentation, the roosters were fed diets with a single raw material and the material with non-starch polysaccharide enzymes to determine the metabolizable energy and energy metabolizability of corn and corn by-products before and after adding NSP enzymes. The results showed that except three types of corn gluten meals and two types of corn sugar dregs, the apparent metabolizable energy(AME) and true metabolizable energy(TME) of other corn by-products were lower than those of corn. The prediction equations of corn and corn by-product were showed as follows: AME=3.322 1+0.704 2GE-0.521 3CF (R2=0.893 9), TME=25.697 6+0.742 5GE-0.426 2CF-0.252 2DM (R2=0.919 4). After NSP enzymes was added, apparent energy metabolizability and true energy metabolizability of corn germ (not gunited) were the lowest, and the highest one was corn gluten meal (crude protein 55%). And the enzyme addition increased the apparent energy metabolizability of corn and corn by-product by 0.82% to 3.32%, increased true energy metabolizability by 0.78% to 3.00%, increased AME by 0.82% to 3.30%, and increased TME by 0.98%～2.94%. The range of Effective nutrient improvement value (ENIV) of AME and TME of corn and corn by-products 0.19 to 0.25 MJ/kg, and the highest one was corn fiber feed, and the lowest one was corn. In conclusion, complex NSP enzymes can improve the energy utilization and efficiency of corn and corn by-products.
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