Changes in aluminum pools of andisols due to soil acidification

Baba, Mitsuhisa; Okazaki, Masanori

doi:10.1080/00380768.2000.10409145

Cited by 16 publications

(11 citation statements)

References 22 publications

(26 reference statements)

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“…Shoji et al (1988) found the same trend in soils in northern Japan developed mainly from volcanic ash deposits and under different climate and vegetation, irrespective of differences in soil groups and soil horizons. Previously, Baba and Okazaki (2000) showed that a decrease in the pool of amorphous Al, represented by the (Al ox -Al p ) fraction, and an increase in the proportion of exchangeable and organically bound Al pools, were associated with a decrease in soil pH.…”

Section: General Discussion -Implications For Pedogenesismentioning

confidence: 99%

“…Here we investigate mechanisms controlling the activity of Al in A and AB horizons of the same two soils rich in shortrange ordered aluminosilicates and organically bound Al. Previous field studies (Baba and Okazaki, 2000) suggest that soil solutions in such horizons are undersaturated with respect to allophane/imogolite. In addition, spatial variation in soil characteristics indicates that a decrease in soil pH is associated with a depletion of short-range ordered aluminosilicates and an increase in the pool of Al-SOM complexes (Baba and Okazaki, 2000).…”

Section: Introductionmentioning

confidence: 98%

“…Previous field studies (Baba and Okazaki, 2000) suggest that soil solutions in such horizons are undersaturated with respect to allophane/imogolite. In addition, spatial variation in soil characteristics indicates that a decrease in soil pH is associated with a depletion of short-range ordered aluminosilicates and an increase in the pool of Al-SOM complexes (Baba and Okazaki, 2000). In our study, we use controlled equilibrium acid-base titrations and studies of mineral dissolution kinetics in the laboratory.…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

The role of soil organic matter and short-range ordered aluminosilicates in controlling the activity of aluminum in soil solutions of volcanic ash soils

2006

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Section: General Discussion -Implications For Pedogenesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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The role of soil organic matter and short-range ordered aluminosilicates in controlling the activity of aluminum in soil solutions of volcanic ash soils

2006

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“…After extraction of short-range ordered aluminosilicates by acid oxalate, Dahlgren and Saigusa (1994) found a large reduction of Al release rates in an Andisol, using a kinetic flow-through dissolution experiment. Recently, Baba and Okazaki (2000) revealed that a decrease of soil pH in Andisol surface horizon was associated with depletion of the pool of short-range ordered aluminosilicates and an increase in the proportion of exchangeable Al and more strongly bound Al-SOM complexes.…”

Section: Introductionmentioning

confidence: 99%

Comparing the activity of aluminum in two B horizons developed from volcanic ash deposits in Japan, dominated by short-range ordered aluminosilicates and crystalline clay minerals, respectively

Yagasaki

Mulder

Okazaki

2006

Geochimica et Cosmochimica Acta

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“…2001; Takahashi et al . 2001), secondary mineral dissolution (Baba and Okazaki 2000; Funakawa et al . 1993) and primary mineral dissolution (Sato and Takahashi 1996) have been reported.…”

Section: Introductionmentioning

confidence: 99%

Relationship between chemical and mineralogical properties and the rapid response to acid load of soils in humid Asia: Japan, Thailand and Indonesia

Watanabe

Ogawa²,

Shinya

et al. 2008

Soil Science and Plant Nutrition

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It is essential to determine the relationship between soil chemical and mineralogical properties and soil response to acid load to understand the acid-neutralizing capacity and cation behavior of different ecosystems. For 46 soil samples from a subsurface horizon in humid Asia, that is, Japan, Thailand and Indonesia, exchangeable cations, total bases and oxalate-extractable Al (Al o ) were determined, and acid titration was conducted to investigate the rapid soil response to acid load. The acid titration experiment indicated three types of soil response: (1) the release of base cations (particularly Ca and Mg) strongly correlated with exchangeable bases, which dominated the tropical soil samples, (2) the release of Al correlated with Al o content, which dominated the Japanese soil samples, (3) acid and anion adsorption in soil samples with low acid-neutralizing capacity. To gain further information on the source of soil alkalinity, a column experiment with HCl was conducted using eight selected soil samples in which first-order kinetics were assumed to simulate the time-courses of cation release. In the column experiment, the amounts of Ca and Mg released were close to the exchangeable amounts, and Al o dissolved more rapidly than Al in crystalline minerals. The rate constants of cation release were large for Ca and Mg, and small for Al, clearly indicating a difference between the exchange and dissolution reactions. Thus, rapid soil response to acid load differed among the soils. A cation exchange reaction was dominant in the tropical soils. In some tropical soils, Ca and Mg were present in exchangeable forms at a higher ratio in the total amounts and they were considered to be easily utilized by plants, but leached out from the soils. In the Japanese soils, including the Andisols, secondary mineral dissolution was conspicuous, resulting in a large acid-neutralizing capacity. In both the tropical and Japanese soils with low acid-neutralizing capacity, anion adsorption mainly contributed to acid neutralization.Rapid response to acid load of soils in humid Asia 857

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Changes in aluminum pools of andisols due to soil acidification

Cited by 16 publications

References 22 publications

The role of soil organic matter and short-range ordered aluminosilicates in controlling the activity of aluminum in soil solutions of volcanic ash soils

The role of soil organic matter and short-range ordered aluminosilicates in controlling the activity of aluminum in soil solutions of volcanic ash soils

Comparing the activity of aluminum in two B horizons developed from volcanic ash deposits in Japan, dominated by short-range ordered aluminosilicates and crystalline clay minerals, respectively

Relationship between chemical and mineralogical properties and the rapid response to acid load of soils in humid Asia: Japan, Thailand and Indonesia

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