Humification and nitrogen mineralization of crop residues in semi-arid Argentina

Crop residues in the soil play a fundamental role in organic matter dynamics and have effects on numerous beneficial soil properties. The humification of residues depends on soil nutrient status and physical and meteorological conditions. The prediction of the humification rate and of the size and d...

Full description

Saved in:
Bibliographic Details
Published in:Science of the total environment 1992-05, Vol.117 (118), p.263-270
Main Authors: Galantini, J.A., Rosell, R.A., Andriulo, A., Miglierina, A., Iglesias, J.
Format: Article
Language:English
Subjects:
agricultural systems
Agronomy. Soil science and plant productions
ARGENTINA
ARGENTINE
AZOTE
Biological and medical sciences
Chemical, physicochemical, biochemical and biological properties
CROP RESIDUES
Fundamental and applied biological sciences. Psychology
humification
HUMUS
MINERALISATION
MINERALIZACION
MINERALIZATION
NITROGEN
NITROGENO
Organic matter
Physics, chemistry, biochemistry and biology of agricultural and forest soils
RESIDU DE RECOLTE
residue
RESIDUOS DE COSECHAS
semi-arid region
SEMIARID ZONES
Soil science
TRITICUM
Triticum aestivum
wheat
ZONA SEMIARIDA
ZONE SEMI ARIDE
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Crop residues in the soil play a fundamental role in organic matter dynamics and have effects on numerous beneficial soil properties. The humification of residues depends on soil nutrient status and physical and meteorological conditions. The prediction of the humification rate and of the size and decomposition of fresh and humified soil organic matter has been attempted with equations and models which require several constants. To simplify the procedure. Janssen developed an equation which utilizes only one constant, permits calculation of the young (fresh) and old (humified) soil organic matter pools and predicts the production of available or mineralized nitrogen. The validity of Janssen's equation was tested in three production systems (a crop rotation and two tillage procedures) in a sandy-loam textured, thermic, entic Haplustoll soil in the pampean semi-arid region of Argentina. The model produced results compatible with actual field data, but information on soil available water was essential for fitting and interpreting the organic matter dynamics.
ISSN:0048-9697
1879-1026
DOI:10.1016/0048-9697(92)90093-8