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Titolo:
Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Quebec, Canada
Autore:
Beauchemin, S; Simard, RR;
Indirizzi:
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: 4, volume: 79, anno: 1999,
pagine: 615 - 625
SICI:
0008-4271(199911)79:4<615:SPSDRO>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SANDY LOAM SOILS; PHOSPHATE-SORPTION; CALCAREOUS SOILS; NORTHERN BELGIUM; WEST-FLANDERS; KINETICS; DESORPTION; PARAMETERS; TRANSPORT; MODEL;
Keywords:
phosphorus; saturation; management;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Beauchemin, S Agr & Agri Food Canada, Soils & Crops Res & Dev Ctr, 2560 Hochelaga Blvd, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada 2560 Hochelaga Blvd St Foy PQ Canada G1V 2J3
Citazione:
S. Beauchemin e R.R. Simard, "Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Quebec, Canada", CAN J SOIL, 79(4), 1999, pp. 615-625

Abstract

Many agricultural fields contain excessive labile soil P in regard to cropneeds. Its environmental fate must be assessed. The concept of P saturation degree is meaningful as it describes the portion of the soil binding sites already covered with P, and indicates the potential desorbability of soilP. The first objective of this study was to review different indices that have been proposed to estimate the degree of soil P saturation and the relationships between soil P saturation degree and P solubility. The second objective is to discuss their suitability as environmental indicators for P management in the province of Quebec, Canada. In the Netherlands, the P saturation index is defined as the ratio of P to Al + Fe contents extracted by ammonium oxalate [P-ox/(Al-ox + Fe-ox) or (P-ox/0.5(Al-ox + Fe-ox)]. This approach has been mainly used with non-calcareous soils. In Quebec, the ratioof Mehlich-III extractable P to Al (M3P/AlM3) is proposed as an alternative, which relies on routine laboratory test. However, the suitability of theM3P/AlM3 ratio has yet to be determined for some specific soil groups (e.g. gleyed soils, soils with Al-ox content >6 g kg(-1)) and for Subsoil horizons. Regardless of the chosen index, it is suggested that the best way to manage the risk of water contamination by P in Quebec (namely, defining critical levels of soil P saturation) may be to form homogeneous soil groups toaccount for their distinctive behaviour and characteristics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 00:34:43