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Titolo:
Biochemical quality of crop residues and carbon and nitrogen mineralization kinetics under nonlimiting nitrogen conditions
Autore:
Trinsoutrot, I; Recous, S; Bentz, B; Lineres, M; Cheneby, D; Nicolardot, B;
Indirizzi:
INRA, Unite Agron Chalons Reims, Ctr Rech Agron, F-51686 Reims 2, France INRA Reims France 2 alons Reims, Ctr Rech Agron, F-51686 Reims 2, France INRA, Unite Agron Laon Peronne, F-02007 Laon, France INRA Laon France F-02007 Unite Agron Laon Peronne, F-02007 Laon, France INRA, Stn Agron, F-33883 Villenave Dornon, France INRA Villenave Dornon France F-33883 n, F-33883 Villenave Dornon, France INRA, CMSE, Lab Microbiol Sols, F-21034 Dijon, France INRA Dijon France F-21034 MSE, Lab Microbiol Sols, F-21034 Dijon, France
Titolo Testata:
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
fascicolo: 3, volume: 64, anno: 2000,
pagine: 918 - 926
SICI:
0361-5995(200005/06)64:3<918:BQOCRA>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
WHEAT STRAW DECOMPOSITION; CHEMICAL-COMPOSITION; FIELD CONDITIONS; PLANT RESIDUES; ORGANIC-MATTER; PARTICLE-SIZE; SOIL; LIGNIN; RELEASE; LEAVES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Nicolardot, B INRA, Unite Agron Chalons Reims, Ctr Rech Agron, 2 Esplaanade Roland Garros,BP 224, F-51686 Reims 2, France INRA 2 Esplaanade Roland Garros,BP 224 Reims France 2 rance
Citazione:
I. Trinsoutrot et al., "Biochemical quality of crop residues and carbon and nitrogen mineralization kinetics under nonlimiting nitrogen conditions", SOIL SCI SO, 64(3), 2000, pp. 918-926

Abstract

Statistical relationships were established between the fate of C and N from 47 types of crop residues and their biochemical characteristics during a soil incubation at 15 degrees C. The incubations were carried out under nonlimiting N in order to differentiate the effects of biochemical characteristics of residues from those of soil N availability. Depending on the residue, the apparent mineralization of residue C after 168 d varied from 330 to 670 g kg(-1) of added C Mineralization kinetics were described using a two-compartment decomposition model that decomposes according to first-order kinetics. Amounts of C mineralized after 7 d and the decomposition rate coefficient of the labile fraction were related mainly to the soluble C forms ofthe residue, No statistical relationship was established between the N concentration of residues and their decomposition in the soil. The incorporation of crop residues into soil led to various soil mineral N dynamics. Two residues caused net N mineralization from the time of their incorporation, whereas all the others induced net N immobilization (1-33 g N kg(-1) of added C). After 168 d, only residues with a C/N ratio <24 induced a surplus of mineral N compared with the control soil. The mineral N dynamics were related mainly to the organic N concentration of the residues and to their C/N ratio. At the start of incubation, these dynamics were also influenced by the presence of polyphenols in the plant tissues. Finally, this study show-edthe need to include the biochemical quality of crop residues in any C and N transformation models that describe decomposition. In contrast, the N concentration or C/N ratio of the residues are sufficient to predict the net effects of crop residues on soil mineral N dynamics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 07:19:20