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Impact—Shredding Processing of Whole-Plant Corn: Machine Performance, Physical Properties, and In Situ Ruminant Digestion

Author

Listed:
  • David A. Pintens

    (Department of Biological Systems Engineering, University of Wisconsin, Madison, WI 53706, USA)

  • Kevin J. Shinners

    (Department of Biological Systems Engineering, University of Wisconsin, Madison, WI 53706, USA)

  • Joshua C. Friede

    (Department of Biological Systems Engineering, University of Wisconsin, Madison, WI 53706, USA)

  • Matthew F. Digman

    (Department of Biological Systems Engineering, University of Wisconsin, Madison, WI 53706, USA)

  • Kenneth F. Kalscheur

    (U.S. Dairy Forage Research Center, USDA-Agricultural Research Service, Madison, WI 53706, USA)

Abstract

An intensive processing mechanism that combined impact and shredding was applied to create physical disruption of whole-plant corn as a means to increase in situ dry matter (DM) digestion in lactating dairy cows. A ratio of treatment leachate conductivity relative to that of an ultimately processed treatment, defined as a processing level index, was used to quantify material physical disruption. Two processing levels were compared to a control treatment, which applied conventional chopping and kernel processing. The non-grain fraction was substantially size-reduced by processing such that only 28% to 51% by mass of this material remained greater than 6.4 mm length. After processing with the experimental processor, greater than 85% of kernels passed through a 4.75 mm screen, and the corn silage processing score (CSPS) was 18 to 27 percentage points greater than the control. The highly fiberized material was more compliant; thus, compacted density was 9% to 17% greater than the control. During in situ digestion experiments, processing significantly increased the rapidly soluble DM fraction by 10 percentage points and the extent of DM disappearance by 5 percentage points through 16 h incubation.

Suggested Citation

  • David A. Pintens & Kevin J. Shinners & Joshua C. Friede & Matthew F. Digman & Kenneth F. Kalscheur, 2023. "Impact—Shredding Processing of Whole-Plant Corn: Machine Performance, Physical Properties, and In Situ Ruminant Digestion," Agriculture, MDPI, vol. 13(1), pages 1-17, January.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:1:p:160-:d:1028889
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    References listed on IDEAS

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    1. Filip Jančík & Petra Kubelková & Dana Kumprechtová & Radko Loučka & Petr Homolka & Veronika Koukolová & Yvona Tyrolová & Alena Výborná, 2021. "Quality of Chopped Maize Can Be Improved by Processing," Agriculture, MDPI, vol. 11(12), pages 1-6, December.
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