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Titolo:
NITROGEN-MINERALIZATION POTENTIAL OF MEADOW SOILS
Autore:
SIMARD RR; NDAYEGAMIYE A;
Indirizzi:
AGR CANADA,RES STN,2560 HOCHELAGA BLVD ST FOY G1V 273 PQ CANADA MINIST AGR PECHERIES & ALIMENTAT QUEBEC,SERV SOLS ST FOY G1P 3W8 PQ CANADA
Titolo Testata:
Canadian Journal of Soil Science
fascicolo: 1, volume: 73, anno: 1993,
pagine: 27 - 38
SICI:
0008-4271(1993)73:1<27:NPOMS>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-MATTER; INCUBATION EXPERIMENTS; N-MINERALIZATION; MOISTURE-CONTENT; NITRIFICATION; TEMPERATURE; KINETICS; SASKATCHEWAN; AVAILABILITY; FERTILIZER;
Keywords:
SOIL QUALITY; POTENTIALLY MINERALIZABLE-N; GOMPERTZ EQUATION; SOIL ORGANIC MATTER; SOIL TEXTURE; C; N;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard e A. Ndayegamiye, "NITROGEN-MINERALIZATION POTENTIAL OF MEADOW SOILS", Canadian Journal of Soil Science, 73(1), 1993, pp. 27-38

Abstract

An understanding of the mineralization factors in contrasting cultivated soils is necessary for accurate predictions of plant-available N. The objective of this work was to determine the N-mineralization potential and mathematical models that can properly describe the dynamics of the mineralization process in 20 meadow soils from Quebec. The mineralization was monitored over 55.4 wk in a laboratory incubation at 20-degrees-C with intermittent leaching. The cumulative mineralization curves in most soils were characterized by definite lags or a sigmoidal pattern and near-linear release with time after 20 wk. The data were best described by the Gompertz equation; first-order models were inadequate. The total amount of mineralizable N and the potential mineralization rate were very closely correlated with the total amounts of C or N (r > 0.73; P < 0.01). The clay content was also correlated with these mineralization parameters and significantly improved the prediction of the cumulative and potential N-mineralization rate estimated from the total N or C content of soils. The relationships with other soil characteristics such as soil pH and available nutrient contents were weak but significant. The results of this study suggest that textural classes be added in the correction for organic matter content to improve the precision in N-fertilizer recommendation and in soil-quality classifications based on potential mineralization rate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:40:31