Titre :
|
Interactions between decomposition of plant residues and nitrogen cycling in soil
|
Auteurs :
|
B. Mary ;
S. Recous ;
D. Darwis ;
AL Et
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1996
|
Format :
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p. 71-82
|
Langues:
|
= Anglais
|
Catégories :
|
AGRICULTURE, AGRONOMIE ET ELEVAGE
|
Mots-clés:
|
RESIDUS CULTURAUX
;
SOL
;
DECOMPOSITION
;
CYCLE DE L'AZOTE
|
Résumé :
|
The processes of N mineralization and immobilization which can occur in agricultural soils during decomposition of plant residues are briefly reviewed in this paper. Results from different incubation studies have indicated that the amounts of N immobilized can be very important and that the intensity and kinetics of N immobilization and subsequent remineralization depend on the nature of plant residues and the type of decomposers associated. However, most of the available literature on these processes refer to incubations where large amounts of mineral N were present in soil. Incubations carried out at low mineral N concentrations have shown that the decomposition rate of plant residues is decreased but not stopped. The immobilization intensity, expressed per unit of mineralized C, is reduced and N remineralization is delayed. Nitrogen availability in soil can therefore strongly modify the MIT kinetics (mineralization-immobilization turnover) by a feed-back effect.
|
Source :
|
Plant and soil, vol.181
|