02379naa a2200325 a 450000100080000000500110000800800410001902400520006010000190011224501980013126000090032952013090033865000180164765000280166565000200169365000200171365000180173365000140175170000210176570000240178670000160181070000230182670000200184970000200186970000180188970000210190770000210192870000260194977300780197521563922023-09-19       2023    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s11250-023-03633-02DOI1 aNIWA, M. V. G.  aEffect of physically effective neutral detergent fiber on nutrient intake and digestibility, ruminal and blood parameters, and ingestive behavior of confined beef cattle.h[electronic resource]  c2023  aABSTRACT - We aimed to evaluate the effect of levels of physically effective neutral detergent fiber from forage (NDFfor) on confined cattle?s metabolism and ingestive behavior. Four crossbred steers (514.0 ± 4.54 kg BW) rumen-cannulated were used. The animals were randomly distributed in a 4×4 Latin square design, and the treatments were diets with 9.5%, 5.5%, 2.5%, and 0.0% NDF from whole plant corn silage. The trial was divided into 4 periods of 21 days. The dry matter, organic matter (OM), crude protein, neutral detergent fiber (NDF), physically effective NDF 8mm (peNDF8mm) and NDF1.18mm intakes, and the digestibility of OM and NDF showed a quadratic behavior. The rumen pH values showed a decreasing linear, and the time at pH below 5.8 increased linearly in the diets with lower NDFfor. The production of volatile fatty acids and the proportions of propionate and butyrate showed an increasing quadratic behavior. On the other hand, the proportion of acetate fitted a decreasing quadratic equation. With the lower participation of forage in the diets, the time spent on rumination activity decreased in a quadratic way, and the time spent in idleness increased in a quadratic way. The corn silage can be reduced to 135 g/kg DM in the diet to obtain a minimum of 5.5% of NDF from roughage.  aDigestibility  aNeutral detergent fiber  aNutrient intake  aDigestibilidade  aGado de Corte  aRuminante1 aÍTAVO, L. C. V.1 aÍTAVO, C. C. B. F.1 aDIAS, A. M.1 aDIFANTE, G. dos S.1 aLONGHINI, V. Z.1 aGOMES, R. da C.1 aVEDOVATTO, M.1 aGURGEL, A. L. C.1 aMORAES, G. J. de1 aMONTEIRO, G. O. de A.  tTropical Animal Health and Productiongv. 55, issue 3, article 224, 2023.