数字农科院2.0

Optimizing Enzymatic Pretreatment of Wet-Grade Maize Distiller's Dried Grains with Solubles and Maize Germ Meal for Enhanced Metabolizable Energy Utilization in Broilers

文献类型： 外文期刊

作者： Zheng, Mengli;Zhang, Huixin;An, Jing;Wei, Haoran;Zhang, Tieying;Chen, Qinghua

作者机构：

关键词： maize DDGS;maize germ meal;solid-state fermentation;the metabolic energy;broilers

期刊名称： ANIMALS

ISSN： 2076-2615

年卷期： 2025 年 15 卷 19 期

页码：

收录情况： SCIE（2025版）

摘要： This study addressed the challenges posed by wet-grade maize distiller's dried grains with solubles (DDGS), which are characterized by high moisture and complex fibers that limit their storage and utilization in poultry feed. Three experiments were conducted to enhance their nutritional value through enzymatic and solid-state fermentation treatments. In vitro pre-digestion using multiple enzymes significantly improved dry matter solubility (DMS) and reducing sugar yield for maize DDGS and the ingredient maize germ meal (MGM). Using optimized parameters, wet-based DDGS-MGM was subjected to solid-state fermentation with 500 mg/kg of cellulase and 200 mg/kg of the X1 enzyme (a laboratory-developed multi-enzyme complex), and this treatment enhanced both DMS and reducing sugar yield, and the resulting fermented product was subsequently applied in further experiments. In the broiler trial, forty 22-day-old Arbor Acres broilers with similar body weights were randomly assigned to five treatment groups, including the control group, (50% DDGS + 50% MGM) unfermented group, (62.5% DDGS + 37.5% MGM) unfermented group, (50% DDGS + 50% MGM) fermented group, and (62.5% DDGS + 37.5% MGM) fermented group, with eight replicates per treatment (one broiler per replicate). Replacement of 30% of the basal diet with fermented 50:50 DDGS-MGM material significantly increased apparent metabolizable energy (AME) and nitrogen-corrected AME by 2.74 MJ/kg and 2.73 MJ/kg, respectively, corresponding to improvements of 39.60% and 40.81% compared to the unfermented control (p < 0.05). Economic analysis indicated that using 5% fermented DDGS-MGM in feed reduced cost by 20.45 RMB per metric ton. These findings demonstrate that bioprocessing can improve the utilization and economic value of maize processing by-products, although further validation under practical conditions is needed.

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