Titre :
|
Temperature effects on C- and N-mineralization from vegetable crop residues
|
Auteurs :
|
S. De Neve ;
J. Pannier ;
G. Hofman
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1996
|
Format :
|
p. 25-30
|
Langues:
|
= Anglais
|
Catégories :
|
AGRICULTURE, AGRONOMIE ET ELEVAGE
|
Mots-clés:
|
AZOTE
;
RESIDUS CULTURAUX
;
TEMPERATURE
;
INCUBATION
;
CARBONE
|
Résumé :
|
Net N-mineralization and nitrification from soil organic matter and from vegetable crop residues (leaf-blades of cauliflower and stems of red cabbage) were measured at 4 temperatures during aerobic incubation in the laboratory. C-mineralization from leaf-blades of cauliflower was monitored at 3 different temperatures. N-mineralization from soil organic matter was best described by zero order kinetics N(t)=kt whereas N- and C-mineralization from the crop residues were described by single first order kinetics. Stems of red cabbage mineralized much more slowly than leaf-blades of cauliflower. S-shaped functions were fitted to the relationship between the rate constants of both C and N-mineralization and temperature. The rate parameter kappa of the S-shaped function reflects the temperature dependence of the mineralization rate k.
|
Source :
|
Plant and soil, vol.181
|