Exchangeable cations and cation exchange capacity of forest soil samples: Effects of drying, storage, and horizon

Meyer, W. L.; Arp, Paul A.

doi:10.4141/cjss94-055

Cited by 11 publications

(4 citation statements)

References 2 publications

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“…The decomposition of soil organic matter that closely interacts with Al as a stable form in soil solids might be able to release soluble Al (Meyer and Arp 1994). This may be a possible reason for the larger extracts of Al at the surface horizon in the Ta Teng soil profile.…”

Section: Discussionmentioning

confidence: 99%

Effects of drying on the release of solutes from acid sulfate soils distributed in the Mekong Delta, Vietnam

Kawahigashi¹,

Minh²,

Nguyen³

et al. 2008

Soil Science and Plant Nutrition

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Acids and soluble metal loads resulting from strong acidification preceded by severe drying of acid sulfate soils are fatal soil conditions for agricultural productivity and aquaculture environments. A greater concentration of dissolved Al and Fe after seasonal drought was confirmed in our previous paper using acid sulfate soils in the Mekong Delta. Furthermore, moisture desiccation resulting from land-use change and subsoil excavation for drainage probably promotes soil oxidation followed by acidification. We prepared air-dried soil moisture condition actual acid sulfate soils in the Mekong Delta to evaluate acidification and the release of acids and metals with drying. The pH values of the deepest horizon in the Hydroaquentic Sulfaquepts drastically dropped and greater concentrations of Al and Fe were released with drying. It was a common change from the sulfidic horizon to the sulfuric horizon. A large increase in Al release without a drop in pH after drying was observed in the sulfuric horizons of the Typic Sulfaquept, which developed on the oldest land in the Mekong Delta. Acidification by oxidation of reduced sulfur compounds might be compensated mainly by exchangeable Al and/or by the dissolution of Fe and Al oxides. In contrast, the concentration of Al increased slightly by drying in the sulfuric horizons in the Hydroaquentic Sulfaquept, which developed in the newer delta. The exchangeable basic cations in these soil horizons might still be effective in compensating for the protons produced by the oxidation of pyrite. The difference in the Al released by drying between the two sulfuric horizons might be attributed to the ripeness of the acid sulfate soils. The ripeness of the soil on the older delta might be higher than that on the younger delta. In this study, drying of acid sulfate soils, even in the sulfuric horizon, can promote metal release due to the exchange by protons derived from the oxidation of reduced sulfur compounds. However, further acidification might be compensated by a substantial amount of exchangeable cation and oxide dissolution.

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Section: Discussionmentioning

confidence: 99%

Effects of drying on the release of solutes from acid sulfate soils distributed in the Mekong Delta, Vietnam

Kawahigashi¹,

Minh²,

Nguyen³

et al. 2008

Soil Science and Plant Nutrition

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“…Secondly, we used air-dried humus and soil samples in the extraction of cations in the first determination (t1), whereas in the second determination (t2) we used field-moist samples. Drying of soil samples has been shown to increase the amount of Al and Ca extracted per unit soil mass (Meyer and Arp, 1994). Thus, in both cases the change in method could have contributed to the observed decrease in cation concentration (e.g.…”

Section: Tablementioning

confidence: 98%

Changes in the effects of whole-tree harvesting on soil chemistry during 10years of stand development

Brandtberg

Olsson

2012

Forest Ecology and Management

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“…Subsamples of soil to be analyzed for phosphorus were extracted using the Bray method. Subsamples of soil to be analyzed Ⅱ for exchangeable K + , Ca 2+ , Mg 2+ , Na + , and Al 3+ were extracted with 1 mol L -1 NH 4 Cl solution (Meyer and Arp 1994). The above-mentioned elements were determined by inductively coupled plasma spectrometer (Shimadzu, ICPS-2000, Kyoto, Japan).…”

Section: Vegetation Surveymentioning

confidence: 99%

Forest structure, productivity and soil properties in a subtropical evergreen broad-leaved forest in Okinawa, Japan

Wang

Shibata

2008

Journal of Forestry Research

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Structure, species composition, and soil properties of a subtropical evergreen broad-leaved forest in Okinawa, Japan, were examined by establishment of plots at thirty sites. The forest was characterized by a relatively low canopy and a large number of small-diameter trees. Mean canopy height for this forest was 10 m and stands contained an average of 5400 stems·ha -1 ( 3.0 cm DBH); 64% of those stems ≧ were smaller than 10 cm DBH. The total basal area was 54.4 m 2 ·ha -1 , of which Castanopsis sieboldii contributed 48%. The forest showed high species diversity of trees. 80 tree species ( 3.0 cm DBH) from 31 families was identified in the thirty sampling plots. ≧ C. sieboldii and Schima wallichii were the dominant and subdominant species in terms of importance value. The mean tree species diversity indices for the plots were, 3.36 for Diversity index (H´), 0.71 for Equitability index (J´) and 4.72 for Species richness index (S´), all of which strongly declined with the increase of importance value of the dominant, C. sieboldii. Measures of soil nutrients indicated low fertility, extreme heterogeneity and possible Al toxicity. Regression analysis showed that stem density and the dominant tree height were significantly correlated with soilpH. There was a significant positive relationship between species diversity index and soil exchangeable K + , Ca 2+ , and Ca 2+ /Al 3+ ratio (all p values <0.001) and a negative relationship with N, C and P. The results suggest that soil property is a major factor influencing forest composition and structure within the subtropical forest in Okinawa.

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Exchangeable cations and cation exchange capacity of forest soil samples: Effects of drying, storage, and horizon

Cited by 11 publications

References 2 publications

Effects of drying on the release of solutes from acid sulfate soils distributed in the Mekong Delta, Vietnam

Effects of drying on the release of solutes from acid sulfate soils distributed in the Mekong Delta, Vietnam

Changes in the effects of whole-tree harvesting on soil chemistry during 10years of stand development

Forest structure, productivity and soil properties in a subtropical evergreen broad-leaved forest in Okinawa, Japan

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