添加复合酶和制粒对肉鸡次粉-杂粕-植酸酶型日粮主要养分利用率的影响

Studies on utilization of main nutritients for meat chickens adding compound enzymes and pelleting

【目的】研究复合酶对粉状及颗粒状次粉-杂粕-植酸酶型日粮能量及养分利用率的影响，为复合酶在肉鸡饲料中的合理应用提供依据。【方法】选择健康、体质量1．8～2.0kg的黄羽公鸡20只，随机分成4组，每组5只，一组为内源组，其余3组分别强饲次粉-杂粕-植酸酶型基础日粮的粉料（对照组）、基础日粮＋0.25kg／t复合酶的粉料和基础日粮＋0.25kg／t复合酶的颗粒料。收集强饲后36h内的排泄物，测定有机物（OM）、Ca、P、粗蛋白（CP）和氨基酸利用率以及代谢能。【结果】（1）日粮中添加复合酶可显著提高黄羽公鸡对OM、Ca、P、CP、总氨基酸的表观利用率和真利用率、表观代谢能（AME）和真代谢能（TME）；（2）与粉料相比，颗粒料使黄羽公鸡对OM、Ca、P、CP的表观利用率和真利用率及AME和TME进一步提高（P〈0.05或0．01），对总氨基酸表观利用率和真利用率有提高趋势，但差异不显著（P〉0．05）。【结论】添加复合酶和制粒可显著提高肉鸡对次粉-杂粕-植酸酶型日粮能量及主要养分的利用率。

[Objetive] This research studied the middling and reddog-miscellaneous meal-phytase d cocks with a view to get a proof of the rational app cocks nous, effects of compound enzymes and pelleting in the wheat let on energy and utilization of nutritients for yellow lication of compound enzymes in the feed. [Method] 20 of 1.8-2.0 kg were divided into 4 groups. There were 5 cocks in each group, one group was endogenous the remaining three groups were fed the basic diet Powdery （the control group） ,the basic diet ＋0.25 kg/t of the compound enzymes powdery and basic diet ＋0.25 kg/t of the compound enzymes pellet. The utilization of organic matter,Ca,P,CP,amino acid and metabolizable energy were determined. [Result] （1） Compound enzymes used in the diet increased the apprent/true utilization of OM, Ca, P, CP, TAA and AME,TME（P〈0.05 or 0.01） significantly; （2）Compared with the powder,pellet increased significantly the apparent/true utilization of OM,Ca,P,CP,AME,TME（P〈0.05 or 0.01） for yellow cocks,and had a trend of increasing the apparent and true utilization of the total amino acid, but no significant difference （P〈0.05）. [Conclusion] Compound enzyme and pelleting can increase the utilization of main nutrients in the broiler＇s wheat middling and reddog-miscellaneous meal-phytase diet significantly.