Evaluation of N recovery from mucuna placed on the surface or incorporated in a Brazilian oxisol

This study was conducted to a) determine the rates of mineral N accumulation in soil (Dark Red Latosol or Typic Haplustox, oxidic, isothermic) under greenhouse conditions when leaves of Mucuna aterrima (Piper and Tracy) Merr. were either surface placed or mixed with the soil, and b) determine the am...

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Bibliographic Details
Published in:Plant and soil 1990-05, Vol.124 (1), p.91-96
Main Authors: Costa, F.J.S.A. (Cornell Univ., Ithaca, NY (USA). Dept. of Agronomy), Bouldin, D.R, Suhet, A.R
Format: Article
Language:English
Subjects:
ABONOS VERDES
Acid soils
Agricultural soils
Agrology
AZOTE
CROP RESIDUES
ENGRAIS VERT
FERRALSOL
FERRALSOLES
FERRALSOLS
GREEN MANURES
Legumes
MINERALISATION
MINERALIZACION
MINERALIZATION
MUCUNA ATERRIMA
Mulches
Mulching
NITROGEN
NITROGENO
Orchard soils
Organic soils
Plant products
RESIDU DE RECOLTE
RESIDUOS DE COSECHAS
Soil composition
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Summary:This study was conducted to a) determine the rates of mineral N accumulation in soil (Dark Red Latosol or Typic Haplustox, oxidic, isothermic) under greenhouse conditions when leaves of Mucuna aterrima (Piper and Tracy) Merr. were either surface placed or mixed with the soil, and b) determine the amount of N lost from the surface placed legume which is recovered in the soil as mineral N. After 178 days, the treatment where mucuna was incorporated had a net inorganic N accumulation 60% higher than the treatment with mucuna placed on the surface. After 178 days, only 55% of N applied as surface placed legume was found in the remaining undecomposed residue or as inorganic N in the soil. The data and literature suggest that part of this unrecovered N was lost by ammonia volatilization.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00010936