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Titolo:
EVALUATING PLANT-AVAILABLE POTASSIUM WITH STRONTIUM CITRATE
Autore:
SIMARD RR; ZIZKA J;
Indirizzi:
AGR CANADA,RES STN,2560 HOCHELAGA BLVD ST FOY G1V 2J3 PQ CANADA
Titolo Testata:
Communications in soil science and plant analysis
fascicolo: 9-10, volume: 25, anno: 1994,
pagine: 1779 - 1789
SICI:
0010-3624(1994)25:9-10<1779:EPPWSC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONTARIO SOILS; QUEBEC SOILS; ELECTROULTRAFILTRATION; PREDICTION; EXTRACTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard e J. Zizka, "EVALUATING PLANT-AVAILABLE POTASSIUM WITH STRONTIUM CITRATE", Communications in soil science and plant analysis, 25(9-10), 1994, pp. 1779-1789

Abstract

The 0.02M strontium chloride (SrCl2) and 0.05M citric acid solution (Sr-citrate) was developed for the simultaneous determination of availability indices for plant nutrients from soils. The objective of this study was to compare the Sr-citrate extracting solution with water, 0.002M SrCl2, 0.1M barium chloride (BaCl2), 0.1M hydrochloric acid (HCI),1M ammonium acetate (NH4OAc), and Mehlich 3 soil extractants as predictors of plant-available potassium (K) for alfalfa (Medicago sativa L.) in the greenhouse. The Sr-citrate solution extracted more soil K than SrCl2 and BaCl2 but less than the other extractants. The Sr-citrate solution was best for predicting K uptake from low cation exchange capacity (CEC < 15 cmol(c)/kg) soils and adequately predicted plant uptake from higher CEC soils and the relative yield of alfalfa in all soils. The relationship between Sr-citrate K and plant uptake was slightly improved when boiling nitric acid (HNO3)-extracted K or organic mattercontent was included in the multiple regression equation. The resultsof this study show that the Sr-citrate procedure can adequately predict the amount of plant-available K in soils.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 09:02:29