Effects of enzyme inclusion in a maize-soybean diet on broiler performance
Effects of enzyme inclusion in a maize-soybean diet on broiler performance
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DOI：
10.1016/j.anifeedsci.2006.09.017
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发表时间：
2007-04-02
影响因子：
3.2
通讯作者：
Chiou, Peter W. S.
中科院分区：
文献类型：
--
作者：
Yu, B.;Wu, S. T.;Chiou, Peter W. S.
本研究的目的是通过降低肉鸡生产中蛋白质水平来减少氮排泄，从而制定一种环境友好型日粮。这是通过在低粗蛋白玉米-豆粕肉鸡饮食中加入市售酶制剂来完成的;蛋白酶和糖酶的混合物（E-1）或单一蛋白酶（E-2）。在两个不同的季节重复两个实验。两种酶制剂在冷季均提高了所有日粮的采食量，但在热季显著降低了低蛋白日粮（LP）的采食量，提高了基础日粮（BD）的采食量。与未添加酶的组相比，添加酶的组中的肉鸡具有更好的体重增加，但仅添加E-2改善了饲料转化率。然而，添加酶E-2并没有改善干物质和蛋白质的体内消化率，但与不添加大豆蛋白的相应成分相比，补充。在玉米-豆粕日粮中添加单一蛋白酶或蛋白酶和糖酶的混合物均能提高鸡的生长。(c)2006 Elsevier B. V.保留所有权利。
The aim of the current study was to formulate an environmentally-friendly diet through reducing nitrogen excretion by lowering protein levels in broiler production. This was done via inclusion of commercially available enzyme preparations; either a mixture of protease and carbohydrase (E-1) or a single protease (E-2), on a low crude protein maize-soybean meal broiler diet. Two experiments were repeated in two different seasons. Both enzyme supplementations increased feed intake for all diets in the cool season, but significantly decreased feed intake in the low-protein diet (LP) and increased in basal diet (BD) during the hot season. Broiler chickens in the enzyme-supplemented groups had better body weight gain as compared to those without supplementation, but only the E-2 supplementation improved feed conversion The enzyme E-2 supplementation, however, did not improve in vivo digestibility of the dry matter and protein, but significantly increased soybean meal hydrolysis rate and protein digestibility in the in vitro assay as compared to the respective ingredient without supplementation. Addition of either the single protease or the cocktail of protease and carbohydrase to a maize-soybean meal diet improved chicken growth. (c) 2006 Elsevier B.V. All rights reserved.