Soybean meal (SBM), a co-product of soybean oil obtained via solvent or mechanical extrusion, is the key protein source in broiler diet formulations. Mechanical extrusion, or high-temperature processing with high-shear dry extrusion, has demonstrated 1 to 2% increased amino acid digestibility in broilers versus solvent-extracted SBM through reduction of antinutritional factors (ANF). High-shear dry extrusion followed by mechanical pressing using a screw press (extruding-pressing) produces soy oil and partially de-oiled soymeal (ExPress). The extruding-pressing process has been growing in popularity due to improved cost and material efficiency by eliminating the need for solvents or steam dryers in the production of animal feed ingredients. Corn extrusion is likewise linked with increased nutritive value through improved palatability and approximately 20% increased starch gelatinization, resulting in superior growth performance and in one reported case, reduced mortality in broilers. In the present study, high-shear dry extruded corn and ExPress SBM were formulated in combination with conventional corn and solvent-extracted SBM to determine impact on growth performance in male broilers. Extruded corn increased feed intake and ExPress SBM increased weight gain. The diet containing dry extruded corn and ExPress SBM outperformed all other diet combinations, including unprocessed, ground corn and conventional, solvent-extracted SBM variations. The diet containing unprocessed, ground corn and ExPress SBM had the most efficient overall feed conversion ratio (FCR). The combination of lower feed intake observed with the ground corn ingredient and the improved protein digestibility reflected by superior growth in ExPress SBM made this the ideal formulation, out of the 4 diets examined, in terms of feed efficiency.

豆粕 ( SBM ) 是通过溶剂或机械挤出获得的豆油的副产品，是肉鸡日粮配方中的关键蛋白质来源。机械挤压，或高剪切干挤压高温加工，已证明通过减少抗营养因子 ( ANF)，肉鸡的氨基酸消化率比溶剂提取的 SBM 提高 1% 到 2%）。高剪切干挤出，然后使用螺旋压榨机进行机械压榨（挤出-压榨）生产豆油和部分脱油豆粕 (ExPress)。由于在动物饲料成分的生产中不需要溶剂或蒸汽干燥器，从而提高了成本和材料效率，挤压工艺越来越受欢迎。通过改善适口性和增加约 20% 的淀粉糊化，玉米挤压同样与营养价值增加有关，从而产生优异的生长性能，在一个报告的案例中，降低了肉鸡的死亡率。在本研究中，高剪切干挤压玉米和 ExPress SBM 与常规玉米和溶剂提取的 SBM 相结合，以确定对雄性肉鸡生长性能的影响。挤压玉米增加了采食量，ExPress SBM 增加了增重。含有干挤压玉米和 ExPress SBM 的日粮优于所有其他日粮组合，包括未加工的磨碎玉米和传统的、溶剂提取的 SBM 变体。含有未加工、磨碎的玉米和 ExPress SBM 的日粮具有最有效的总饲料转化率（FCR )。使用磨碎的玉米成分观察到的较低的饲料摄入量和 ExPress SBM 的优异生长所反映的改善的蛋白质消化率相结合，使其成为所检查的 4 种日粮中就饲料效率而言的理想配方。