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Physically Adjusted Neutral Detergent Fiber System For Lactating Dairy Cow Rations. I: Deriving Equations That Identify Factors That Influence Effectiveness Of Fiber, Robin R. White, Mary Beth Hou, Jeffrey L. Firkins, Paul J. Kononoff
Physically Adjusted Neutral Detergent Fiber System For Lactating Dairy Cow Rations. I: Deriving Equations That Identify Factors That Influence Effectiveness Of Fiber, Robin R. White, Mary Beth Hou, Jeffrey L. Firkins, Paul J. Kononoff
Department of Animal Science: Faculty Publications
Physically effective neutral detergent fiber (peNDF) is the fraction of neutral detergent fiber (NDF) that stimulates chewing activity and contributes to the floating mat of large particles in the rumen. Multiplying dietary NDF by particle size has been used as an estimate of peNDF. In re-evaluating the concept of peNDF, we compared the use of peNDF as dietary NDF × particle size with the use of individual NDF and particle size descriptors (physically adjusted NDF; paNDF) when used with other physical and chemical diet descriptors to predict dry matter (DM) intake (DMI), rumination time, and ruminal pH in lactating dairy …