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This experiment aims to compare different methods for estimating physically effective neutral detergent fiber (peNDF) in finishing beef cattle diets.

PS1-5. Comparison of Analytical Methods for Physically Effective Fiber Estimation in Finishing Beef Cattle Diets

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This experiment aims to compare different methods for estimating physically effective neutral detergent fiber (peNDF) in finishing beef cattle diets.
Compared peNDF estimation methods using total-sample NDF and sieve-specific NDF values from various ingredients.
Samples included short-cut and long-cut prairie hay, Sweet Bran, and dry-rolled corn, collected weekly (n=8).
Analyses were conducted using the MIXED procedure in SAS 9.4, evaluating the effects of sieve or method.
NDF concentrations varied significantly among sieves and whole samples for all ingredients (P < 0.01) except corn (P = 0.07).
Traditional method yielded higher peNDF for Sweet Bran (2.31%, P = 0.02) and SC Hay (0.85%, P = 0.03).
Non-uniform NDF distribution had minimal impact on peNDF estimation, indicating limited benefit to ingredient-specific analysis.

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Randomized trial compares estimation methods for effective fiber in beef cattle diets, suggesting minimal impact from non-uniform NDF distribution.

LeDoux et al. (2026) studied this question.

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Randomized trial compares estimation methods for effective fiber in beef cattle diets, suggesting minimal impact from non-uniform NDF distribution.