摘要
试验旨在研究肉鸡低能日粮中添加木聚糖酶或复合酶对肉鸡生产性能和养分消化率的影响。采用单因子的试验设计，试验分6个处理，每个处理8个重复，每重复10只肉仔鸡。6个试验饲粮处理分别为正对照组（PC）、负对照组（NC，在正对照组基础上降低表观代谢能836kJ／kg）、以及4个在NC基础上的加酶组（分别为处理1：木聚糖酶添加量为4000U／kg饲料；处理2：木聚糖酶、a-淀粉酶和蛋白酶分别为300U／kg、400U／kg和4000U／kg饲料；处理3：木聚糖酶、a-淀粉酶和蛋白酶分别为：1383U／kg、67U／kg和667U／kg；处理4：木聚糖酶、a-淀粉酶和蛋白酶分别为2766U／kg、134U／kg和1334U／kg）。试验结果表明，与PC相比，NC降低了肉鸡的增重、提高了料肉比（P〈0．051；与NC相比，4个加酶组提高增重3％～10％和改善料肉比2％-8％（P〈0．05），加酶后NC组肉鸡的生产性能达到了PC水平。NC降低了干物质、粗蛋白和能量的表观消化率（P〈0．05），加酶组对养分消化率具有提高作用，且达到了PC水平；木聚糖酶和复合酶两种酶制剂对肉鸡生产性能和养分消化率的影响差异不显著，处理3和4两组间差异不显著（P〉0.05）。结果表明，在降低代谢能836kJ／kg的肉鸡饲粮中添加木聚糖酶或复合酶，能够使肉鸡的生产性能和养分消化率得以补偿，低能负对照饲粮加酶后能够使肉鸡的生产性能达到与正对照组相同水平。
The objective of this study was to investigate the effect of xylanase, multiple enzymes and their combinations on the growth performance and nutrient digestibility of broilers fed low-energy diets. The trial was a single factor design, including six treatments with 8 replicates, 10 birds per replicate. Diets included positive control （PC）, negative control （NC, AME was reduced by 836 kJ/kg）, as well as four treatment groups （Treatment l：xylanase was 4 000 U/kg feed; Treatment 2： xylanase, a-amylase and protease were 300 U/kg, 400 U/kg and 4 000 U/kg feed respectively; Treatment 3： xylanase, a- amylase and protease werel 383 U/kg, 67 U/kg and 667 U/kg respectively; Treatment 4： xylanase, a- amylase and protease were 2 766 U/kg, 134 U/kg and 1 334 U/kg respectively）.The results showed that body weight gain and feed/gain were poor in NC compared with PC. In contrast with NC, inclusions of enzymes increased weight gain by 3%-10% and improved feed/gain by 2%-8% （P〈0.05）. There were no differences in growth and nutrient digestibility between xylanase and multiple enzymes, there were no differences between treatment 3 and 4 （P≥0.05）. The results showed that in diets with reduced energy 836 kJ/kg, adding enzymes can restore the growth performance and nutrient digestibility of broilers.
出处
《饲料工业》
北大核心
2011年第16期39-42,共4页
Feed Industry
关键词
肉鸡
消化率
生产性能
酶制剂
broilers
digestibility
performance
enzyme
