Nitrogen mineralization rate of winter cover crops in no-till system

DOI: 10.52945/rac.v19i2.935
Published 2006-05-27

Authors

  • Anderson Fernando Wamser
    Epagri/Estação Experimental de Caçador
  • Ibanor Anghinoni
    UFRGS
  • Egon José Meurer
    UFRGS
  • Claudio Mario Mundstock
    UFRGS
  • Paulo Régis Ferreira da Silva
    UFRGS

Abstract

A field experiment was carried out in Eldorado do Sul, RS, Brazil, on a Rhodic Paleodult soil, in
2001, with the objective of evaluating the N release of different winter cover crop systems (winter fallow, black oat, common vetch, radish, black oat+common vetch, black oat+radish, common vetch+radish, black
oat+radish+common vetch) during the initial development of maize. The N supply was estimated by using decomposition bags filled with samples of the cover crops, and by analysing the level of mineral N in the soil. The use of common vetch and radish, in contrast of black oat, provided superior release of N during the first 58 days of decomposition, resulting in the highest soil N-NO3– levels.

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Keywords

  • Avena strigosa Schreb
  • Vicia sativa L.
  • Raphanus sativus L.
  • manejo
  • liberação de N.