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首页> 外文期刊>Tropical Animal Health and Production >The effect of a o-mannanase-based enzyme on growth performance and humoral immune response of broiler chickens fed diets containing graded levels of whole dates
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The effect of a o-mannanase-based enzyme on growth performance and humoral immune response of broiler chickens fed diets containing graded levels of whole dates

机译：基于o-甘露聚糖酶的酶对饲喂含分级完整日期日粮的肉鸡生长性能和体液免疫反应的影响

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摘要

The use of low-quality whole dates in broilers' diets was evaluated. The apparent metabolizable energy (AMEn) of whole dates and date pits was determined with or without a o-mannanase-based enzyme (Hemicell - a registered trademark of ChemGen Corp., Gaithersburg, MD. Dried Bacillus lentus fermentation solubles with 158 million units/kg minimum enzyme activity. Recommended usage rate is 0.4 g kgp# of feed. ChemGen Corp., Gaithersburg, MD, USA). A 3c2 factorial arrangement consisting of whole dates (0, 175, and 350 g kgp#) and enzyme (0 or 0.4 g kgp#) was performed to assess the effect of the enzyme on the nutritive value of whole dates (experiment 2) in broilers' diet. Enzyme improved AMEn contents of the whole dates and date pits. The diets containing 175 or 350 g kgp# whole dates produced body weight gain (BWG) similar to those obtained without dates. Enzyme improved BWG and feed conversion ratio throughout the experimental period. In conclusion, whole dates can be included in broiler diets at levels up to 350 g kgp#. In addition, o-mannanase supplementation would have beneficial effects on performance and immunity in birds fed on corn-soy or corn-soy-whole dates diets.
机译：评估了肉鸡日粮中低质量全枣的使用。使用或不使用基于o-甘露聚糖酶的酶（Hemicell-ChemGen Corp.，Gaithersburg，MD的注册商标）测定整个枣和枣核的表观代谢能（AMEn）。枯草芽孢杆菌发酵可溶性物质为1.58亿单位/ kg最低酶活性，建议用量为0.4 g kgp＃饲料（美国，马里兰州盖瑟斯堡，ChemGen公司）。进行了一个3c2阶乘安排，该安排包括完整日期（0、175和350 g kgp＃）和酶（0或0.4 g kgp＃），以评估酶对全枣营养价值的影响（实验2）。肉鸡的饮食。酶改善了整个日期和日期坑的AMEn含量。日粮中含有175或350 g kgp＃的日粮所产生的体重增加（BWG）与无日期的日粮相似。在整个实验期间，酶改善了BWG和饲料转化率。总之，肉鸡日粮中的全枣含量最高为350 g kgp＃。另外，补充o-甘露聚糖酶将对以玉米大豆或玉米大豆全日粮喂养的禽类的生产性能和免疫力产生有益影响。

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