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Titolo:
Grouping soils of the Montreal Lowlands (Quebec) according to fertility and P sorption and desorption characteristics
Autore:
Leclerc, ML; Nolin, MC; Cluis, D; Simard, RR;
Indirizzi:
INRS Eau, St Foy, PQ G1V 2J3, Canada INRS Eau St Foy PQ Canada G1V 2J3INRS Eau, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada, Soils & Crops Res & Dev Ctr, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada St Foy PQ Canada G1V 2J3 t Foy, PQ G1V 2J3, Canada
Titolo Testata:
CANADIAN JOURNAL OF SOIL SCIENCE
fascicolo: 1, volume: 81, anno: 2001,
pagine: 71 - 83
SICI:
0008-4271(200102)81:1<71:GSOTML>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
RUNOFF PHOSPHORUS; MANAGEMENT; PHOSPHATE; INDEXES; DRAINAGE;
Keywords:
soil behavior; soil fertility groups; multivariate analysis techniques;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Nolin, MC INRS Eau, 2800 Einstein,POB 7500, St Foy, PQ G1V 2J3, Canada INRS Eau 2800 Einstein,POB 7500 St Foy PQ Canada G1V 2J3 Canada
Citazione:
M.L. Leclerc et al., "Grouping soils of the Montreal Lowlands (Quebec) according to fertility and P sorption and desorption characteristics", CAN J SOIL, 81(1), 2001, pp. 71-83

Abstract

Soil tests P (STP) developed to estimate P fertilizer needs and designed to produce optimal economic crop yields, are often not well suited to assesspotential environmental impact of fertilization practices. The objective of this study was to develop interpretative soil groupings of the Montreal Lowlands area (MLA) based on soil physico-chemical properties and on soil P sorption and desorption characteristics. Soil P sorption and desorption characteristics together with STP may help in evaluating potential risks of soil P addition. Sixty-six soil types (phases of soil series based on surfacetexture) were selected as representative soils of the study area. Twenty-seven soil properties were used, including Mehlich-3 extractable P and Al, ammonium-oxalate extractable P, Fe and Al, P sorption index (Psi) and Bray-2extractable P (BR2P). Multivariate analysis was applied to generate clusters and interpret soil groupings. Principal components analysis yielded two components related: (l)to soil inherent fertility (texture) and (2) to P sorption capacity and desorption intensity. The Ward's clustering method was then applied to the first two component scores. Five soil fertility groups were obtained. Multiple discriminant analysis proposed a classification model using a small subset of variables. Five variables were selected among the soil survey characteristics for discriminating soil groups: clay content,pH measurement in water, cation exchange capacity, BR2P and ammonium-acetate extractable Mg. Adding Psi in the model improved the classification correctness. The results of this study indicate that physico-chemical properties of the surface layer used together with soil P sorption-desorption characteristics contributed to the development of an interpretative grouping thatmay also be useful to assess vulnerability to water contamination by P.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:02:42