Physically effective fiber changes nutrient levels of total mixed ration and fecal parameters in beef feedlots

ABSTRACT: This study evaluated the effects of the physically effective fiber (peNDF) content on nutrient composition of the total mixed ration (TMR), orts and fecal parameters in 15 commercial beef feedlots. The particle size distribution of TMR was measured adopting Penn State Particle Size Separator (PSPS). Samples were evaluated for dry matter (DM), ash, ether extract (EE), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and starch content. Fecal samples were also evaluated for pH and score. The feedlots were categorized into peNDF

摘要：本研究评估了物理有效纤维（peNDF）含量对全混合日粮（TMR）、副产品及粪便参数在15家商业牛肉养殖场中的影响。采用宾夕法尼亚州立大学颗粒尺寸分离器（PSPS）对TMR的颗粒尺寸分布进行了测量。样品经检测分析其干物质（DM）、灰分、醚提取物（EE）、粗蛋白（CP）、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和淀粉含量。粪便样品亦经pH值和评分评估。养殖场根据peNDF进行分类。