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Titolo:
PHOSPHORUS SORPTION AND DESORPTION INDEXES IN SOIL
Autore:
SIMARD RR; CLUIS D; GANGBAZO G; PESANT AR;
Indirizzi:
AGR CANADA,RES STN,2560 HOCHELAGA BLVD ST FOY G1V 2J3 PQ CANADA INRS EAU ST FOY G1V 4C7 PQ CANADA MENVIQ,DMACP ST FOY G1V 4H2 PQ CANADA AGR CANADA,RES STN LENNOXVILLE J1M 1Z3 PQ CANADA
Titolo Testata:
Communications in soil science and plant analysis
fascicolo: 9-10, volume: 25, anno: 1994,
pagine: 1483 - 1494
SICI:
0010-3624(1994)25:9-10<1483:PSADII>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXTRACTABLE FE; PHOSPHATE; AVAILABILITY; INDEXES; QUEBEC; AL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard et al., "PHOSPHORUS SORPTION AND DESORPTION INDEXES IN SOIL", Communications in soil science and plant analysis, 25(9-10), 1994, pp. 1483-1494

Abstract

Information about phosphorus (P) sorption and desorption indices in soils is useful for environmental evaluations. The objective of this study was to develop P sorption and desorption indices for soils in the Beaurivage River watershed, Quebec, Canada. Thirty samples from the A,B, and C horizons of soils of the five main soil series were taken from sites under forest, dairy farms, and farms with a known surplus of manure. The maximum P sorption capacity (M) was estimated by a 48 h contact with 0.005M CaCl2 solutions of increasing P concentration while P desorption was measured in water (Pw). The P sorption index (Psi) was measured by contact of 1.5 g P/kg soil for 40 h in 0.01 M KCl at a soil to solution ratio of 1:40. Regression analysis was used to generate equations predicting M, Psi, and Pw from readily available data on soil chemical and physical properties. The maximum P sorption capacity (M) was very closely related to the Psi (r>0.97*) in all horizons. The M and Psi sorption parameters were related to organic C (OC), Mehlich 3-extractable P (M3P), and ammonium oxalate extractable Fe (FEOX) and Al (ALOX) in the A horizon; to M3P, ALOX, and the sand content in the B horizon; and to OC and ALOX in the C horizon. The Pw was related to pH, OC, M3P, exchangeable Ca in the A horizon; to M3P and sand content in the B horizon; and to pH, M3P, and FEOX in the C horizon. The relatively low coefficients of correlation and the close correlation found between M and Psi suggest that the latter should be experimentally measured rather than predicted to gain information on the P sorption potential of the soils from this watershed. The results of the present study indicate the M3P can be used in conjunction with other readily available soil data to predict the P desorbability of vulnerable watersheds.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 23:54:34