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Effect of Wilting Intensity, Dry Matter Content and Sugar Addition on Nitrogen Fractions in Lucerne Silages

Author

Listed:
  • Thomas Hartinger

    (Institute of Animal Science, University of Bonn, 53115 Bonn, Germany)

  • Nina Gresner

    (Institute of Animal Science, University of Bonn, 53115 Bonn, Germany)

  • Karl-Heinz Südekum

    (Institute of Animal Science, University of Bonn, 53115 Bonn, Germany)

Abstract

Pre-ensiling treatments can significantly influence the composition of lucerne ( Medicago sativa L.) silages (LS). Besides dry matter (DM) content and availability of water-soluble carbohydrates (WSC), wilting intensity may exert a strong impact on the crude protein (CP; nitrogen [N] × 6.25) fractions. The present study aimed to evaluate the effects of DM level, wilting intensity, and sucrose addition on N compounds and fermentation products in LS. Pure lucerne stand (cultivar Plato) was wilted with either high or low intensity to DM contents of 250 and 350 g kg −1 , respectively, and ensiled with or without the addition of sucrose. Non-protein-N (NPN) concentration in LS was affected by all pre-ensiling treatments and with 699 g kg −1 CP, NPN was lowest in high-intensity wilted high-DM LS with sucrose addition. No effects were observed on in vitro-estimated concentrations of utilizable CP at the duodenum, a precursor to metabolizable protein. Sucrose addition and higher DM level decreased acetic acid and ammonia-N concentration in the silages. Therefore, the present study demonstrated the beneficial manipulation of CP fractions in LS by high-intensity wilting to higher DM contents and that the provision of WSC may be necessary for sufficient silage fermentation and protein preservation.

Suggested Citation

  • Thomas Hartinger & Nina Gresner & Karl-Heinz Südekum, 2019. "Effect of Wilting Intensity, Dry Matter Content and Sugar Addition on Nitrogen Fractions in Lucerne Silages," Agriculture, MDPI, vol. 9(1), pages 1-17, January.
    • Handle: RePEc:gam:jagris:v:9:y:2019:i:1:p:11-:d:195074
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    Cited by:

    1. Hans-Jörg Gusovius & Carsten Lühr & Thomas Hoffmann & Ralf Pecenka & Christine Idler, 2019. "An Alternative to Field Retting: Fibrous Materials Based on Wet Preserved Hemp for the Manufacture of Composites," Agriculture, MDPI, vol. 9(7), pages 1-25, July.

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