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Titolo:
PHOSPHORUS SORPTION-DESORPTION KINETICS OF SOIL UNDER CONTRASTING LAND USES
Autore:
BEAUCHEMIN S; SIMARD RR; CLUIS D;
Indirizzi:
INRS EAU,POB 7500 ST FOY PQ G1V 4C7 CANADA AGR & AGRI FOOD CANADA,SOILS & CROPS RES CTR ST FOY PQ G1V 2J3 CANADA
Titolo Testata:
Journal of environmental quality
fascicolo: 6, volume: 25, anno: 1996,
pagine: 1317 - 1325
SICI:
0047-2425(1996)25:6<1317:PSKOSU>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOSPHATE-TRANSPORT; MINERALIZATION; EXTRACTANT; PARAMETERS; ADSORPTION; SIMULATION; NITROGEN; INDEXES; COLUMNS; SULFUR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
S. Beauchemin et al., "PHOSPHORUS SORPTION-DESORPTION KINETICS OF SOIL UNDER CONTRASTING LAND USES", Journal of environmental quality, 25(6), 1996, pp. 1317-1325

Abstract

.In watersheds with a high density of animal production, the land application of large amounts of manure has led to P accumulation in soils, thereby increasing the risk of P leaching. The objective of this study was to characterize P sorption-desorption kinetics of a soil under contrasting land uses, The A, B, and C horizons of a Typic Humaquept were sampled from a forest (F) and in hay fields of farms with no surplus (D) or a known surplus of manure (SN). Leaching experiments, using a 0.01 M KCl solution containing 5 mg P L(-1) for the sorption phase and a P-free electrolyte solution for the desorption phase, were conducted in glass columns. From the incremental model used, it was estimated that the available P sorption capacities were 50% lower in the agricultural A horizons than in the forest soil. In the B horizon, the P sorption capacities were comparable for all soils. In the C horizon, theavailable P sorption capacity was 75% lower in the SN than in the twoother soils. After P saturation of the samples, the potential amountsof desorbable P in the A and B horizons of agricultural soils were two-fold greater than those of forested soil. A significant relationship(P < 0.05) was established between soil Al,, content and the number of pore volumes necessary to decrease the P concentration of the effluent to 1 mg P L(-1). The results of this study suggest that soils associated with high animal density were more at risk to leach P into drainage waters than low animal density or forest soils.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:37:53