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Titolo:
EVALUATING PLANT-AVAILABLE PHOSPHORUS WITH THE ELECTROULTRAFILTRATIONTECHNIQUE
Autore:
SIMARD RR; SENTRAN T;
Indirizzi:
AGR CANADA,RES STN,2560 HOCHELAGA BLVD ST FOY G1V 2J3 PQ CANADA SERV SOLS ST FOY G1P 3W8 PQ CANADA
Titolo Testata:
Soil Science Society of America journal
fascicolo: 2, volume: 57, anno: 1993,
pagine: 404 - 409
SICI:
0361-5995(1993)57:2<404:EPPWTE>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOIL; EUF; EXTRACTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard e T. Sentran, "EVALUATING PLANT-AVAILABLE PHOSPHORUS WITH THE ELECTROULTRAFILTRATIONTECHNIQUE", Soil Science Society of America journal, 57(2), 1993, pp. 404-409

Abstract

The electro-ultrafiltration (EUF) technique successfully evaluated the short-term and long-term supplying power for many essential plant nutrients of European and Asian soils but has not been evaluated for P in North America. The objective of this study was to compare the capacity of EUF with other extraction techniques to predict the plant availability of soil P and P fertilizer responsiveness of oat (Avena sativa L.) and corn (Zea mays L.) grown in the greenhouse. Increasingly higher average concentrations of soil P were extracted by EUF at 50 V and 20-degrees-C (1.53 mg kg-1),water 2.28 mg kg-1), EUF at 200 V and 20-degrees-C (4.76 mg kg-1), 0.5 M NaHCO3 (13.0 mg kg-1), HCO3- resin (41 mg kg-1), EUF at 400 V and 80-degrees-C (44.2 mg kg-1), and Sr citrate (51 mg kg-1). The P desorbed by EUF at 20-degrees-C was smaller than the 0.5 M NaHCO3 P in acidic soils while comparable amounts were desorbed by the two methods from neutral to calcareous soils. The total amount of P desorbed by EUF between 30 and 55 min at 400 V and 80-degrees-C was equivalent to chemical methods but less precise than HCO3- resinin predicting the amount of P uptake by oat and corn as well as the fertilizer responsiveness of oat grown to Zadoks 71 stage. The prediction of P availability by the different EUF fractions could not be improved by the inclusion of selected additional physical and chemical characteristics of the soils studied. The desorption of soil P by EUF provides an evaluation comparable to chemical methods of the P-supplying power of northeastern North American soils. The large amount of time involved in the EUF extraction limits its applicability as a soil-testing procedure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 00:51:28