Non-starch Polysaccharide Degrading Enzymes in Corn and Wheat-Based Broiler Diets： Dual Activity for Major Substrates  

作　　者：Kirsten De Keyser Noel Dierick Leni Kuterna Olivier Maigret Sebastian Kaczmarek Andrzej Rutkowski Erik Vanderbeke 

机构地区：[1]AVEVE Biochem NV, Eugeen Meeusstraat 6, Merksem 2170, Belgium [2]Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent 9000, Belgium [3]Department of Animal Nutrition, University of Life Sciences, ul. Wojska Polskiego 28, Poznań60-637, Poland

出　　处：《Journal of Agricultural Science and Technology(A)》2018年第2期76-88,共13页农业科学与技术（A）

摘　　要：This study consolidates the efficacy of a non-starch polysaccharide （NSP）ase enzyme-concept in corn and wheat-based broiler diets. The NSP building blocks of corn, wheat and soybean meal （SBM, 44% protein） were studied first. Cereal NSP primarily consists of arabinose, xylose and glucose molecules that form arabinoxylan, β-glucan and cellulose polysaccharides. In soybean meal （SBM）, glucose （cellulose） predominates, next to galactose and uronic acids that form “pectins”. Broiler performance progress using in-feed NSPase enzymes depends on the concentration, complexity and solubility of the substrate and the genetic potential of the animal, mainly. A dual NSPase enzyme-concept for cereal and SBM NSP, predominantly being arabinoxylan, β-glucan and cellulose, was developed. Methods for measuring enzyme activities （endo-1,4-β-xylanase （EC 3.2.1.8） and endo-1,3（4）-β-glucanase （EC 3.2.1.6）） were developed （AVEVE Biochem UNITS） and preparations thereof （XG） standardized to meet requirements for most challenging NSP （corn, barely soluble）. Feed intake （FI）, bodyweight gain （BWG） and feed：gain ratio （F：G） were assessed in three zootechnical studies, each using 160 Ross 308 broilers split in two feeding groups with 80 birds/group （10 replicates of eight） for 42 d （starter/grower period）. Respective corn-SBM, wheat-SBM and corn/wheat-SBM diets were used as negative control （NC） or added with the enzyme-concept （XG）. In the total period, XG ameliorated BWG and F：G compared to NC in each study, where BWG increased best in diets with corn and F：G lowered most in diets with wheat. The dual NSPase enzyme-concept offers ingredient flexibility in present setting by enhancing the nutritional content of corn, wheat and SBM, expectedly from cleaving major NSP target molecules. Thereby, broiler professionals increase feed formulation liberty and safety and production result simultaneously.

关 键 词：BROILER XYLANASE GLUCANASE BWG F：G CORN WHEAT SBM 

分 类 号：S816[农业科学—饲料科学] Q55[农业科学—畜牧学]