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Titolo:
Changes in aluminum pools of andisols due to soil acidification
Autore:
Baba, M; Okazaki, M;
Indirizzi:
Tokyo Univ Agr & Technol, Fac Agr, Fuchu, Tokyo 1838509, Japan Tokyo Univ Agr & Technol Fuchu Tokyo Japan 1838509 , Tokyo 1838509, Japan Tokyo Univ Agr & Technol, Grad Sch Bioappl & Syst Engn, Koganei, Tokyo 1848588, Japan Tokyo Univ Agr & Technol Koganei Tokyo Japan 1848588 Tokyo 1848588, Japan
Titolo Testata:
SOIL SCIENCE AND PLANT NUTRITION
fascicolo: 4, volume: 46, anno: 2000,
pagine: 797 - 805
SICI:
0038-0768(200012)46:4<797:CIAPOA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE CHARACTERISTICS; PRECAMBRIAN SHIELD; AQUEOUS ALUMINUM; FOREST SOILS; DEPOSITION; SOLUBILITY; CHEMISTRY; HORIZONS; SULFATE; ONTARIO;
Keywords:
amorphous aluminum; Andisols; organically bound aluminum; selective dissolution techniques; spatial variability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Baba, M Kitasato Univ, Fac Vet Med & Anim Sci, Towada, Aomori 0348628, Japan Kitasato Univ Towada Aomori Japan 0348628 , Aomori 0348628, Japan
Citazione:
M. Baba e M. Okazaki, "Changes in aluminum pools of andisols due to soil acidification", SOIL SCI PL, 46(4), 2000, pp. 797-805

Abstract

Aluminum concentrations in soil solutions are not only controlled by inorganic clay minerals but also by organically bound aluminum, The objective ofthis study was to determine which pools contribute to Al dissolution. Soilsamples were taken at various distances from tree trunks and at various depths at the Rolling Land Laboratory (RLL), Hachioji, Tokyo. Selective dissolution techniques were used to analyze the changes in pools of solid-phase aluminum. Soil pH values around Hinoki cypresses were in the aluminum buffer range, Exchangeable aluminum contents in soils under Hinoki cypresses were 104 mmol(c) kg(-1) on the average. This value was similar to that of the cation exchange capacity (CEC) of Andisols at RLL at a soil pH of 4, The relationship between the soil pH and exchangeable, organically bound, and amorphous aluminum pools showed that dissolved aluminum ions in the soil solution were primarily derived from the amorphous Al pool. Dissolved aluminum ions were substituted with base cations of soils, resulting in the increase of the content of exchangeable Al and/or the formation of complexes with organic matter which increased the proportion of organically bound Al pools. Increase in the proportion of organically bound Al pools indicated the importance of complexation with soil organic matter for controlling the aluminum concentration in the soil solution.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 10:00:46