EFFECTS OF ORGANIC MATTER AND IRON OXIDES ON CATION EXCHANGE EQUILIBRIA AND POTASSIUM SELECTIVITY IN A VOLCANIC ASH SOIL OF CHILE

AbstractPlants have difficulty absorbing phosphorus from volcanic ash soils owing to the adsorption of phosphorus by aluminum and iron in the soils. Thus, on volcanic ash soils, the phosphorus source for natural vegetation is expected to be organic matter, however, there is a lack of experimental evidence regarding this occurrence. Here, we studied the effect of organic matter on plant growth of some species that occur in primary successions of volcanic ash soil ecosystems, based on growth experiments and chemical analyses. We found that a large amount of inorganic phosphorus (but only a limited amount of inorganic nitrogen) is leached from fresh leaf litter of the pioneer spices Fallopia japonica at the initial stage of litter decomposition. Phosphorus from the fresh litter specifically activated the growth of subsequently invading nitrogen-fixing alder when immature volcanic soil was used for cultivation. In contrast, old organic matter in mature soil was merely a minor source of phosphorus. These results suggest that fresh litter of F. japonica is essential for growth of nitrogen-fixing alder because the litter supplies phosphorus. We consider that rapid phosphorus cycles in fresh litter-plant systems underlie the productivity of natural vegetation even in mature ecosystems established on volcanic ash soils.

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Effect of Temperature Condition on Nitrogen Mineralization of Organic Matter and Soil Microbial Community Structure in non-Volcanic Ash Soil

Korean Journal of Soil Science and Fertilizer ◽

10.7745/kjssf.2012.45.3.377 ◽

2012 ◽

Vol 45 (3) ◽

pp. 377-384 ◽

Cited By ~ 3

Author(s):

Jae-Ho Joa ◽

Kyung-Hwan Moon ◽

Seong-Cheol Kim ◽

Doo-Gyung Moon ◽

Sang-Wook Koh

Keyword(s):

Organic Matter ◽

Community Structure ◽

Microbial Community ◽

Nitrogen Mineralization ◽

Volcanic Ash ◽

Effect Of Temperature ◽

Soil Microbial Community Structure ◽

Soil Microbial ◽

Volcanic Ash Soil ◽

Mineralization Of Organic Matter

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SOME CATION-EXCHANGE PROPERTIES OF SOILS CONTAINING FREE OXIDES

Canadian Journal of Soil Science ◽

10.4141/cjss64-028 ◽

1964 ◽

Vol 44 (2) ◽

pp. 203-211 ◽

Cited By ~ 3

Author(s):

J. S. Clark

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

New Brunswick ◽

Cation Exchange ◽

Iron Oxides ◽

Extraction Procedure ◽

Salt Solutions ◽

Dependent Component ◽

Ph Dependent ◽

Exchange Properties

Low C.E.C. values were obtained for the B horizon of a Concretionary Brown soil from British Columbia and a Podzol from New Brunswick, when CaCl2 was used to saturate the cation-exchange complex. Higher CE.C.'s were obtained if Ca(OAc)2 + CaCl2 was used and this showed that the soils had a large pH-dependent component of the C.E.C. Both soils had a high proportion of pH-dependent charge after the destruction of the soil organic matter. Extraction of free iron oxides increased the C.E.C. of the inorganic exchange fractions and eliminated or decreased the pH-dependent component of the C.E.C. Relatively large amounts of iron and aluminum were removed from the soils by the free oxide extraction procedure. These results suggest that the fixation of aluminum and iron was responsible for the low permanent charge values obtained for the soils. The precipitation of the fixed Al and Fe as Al(OH)3 and Fe(OH)3 when the soils were treated with base or extracted with buffered salt solutions released exchange sites and gave an effect equivalent to the release of exchangeable H so that the soils had a large pH-dependent component of the C.E.C.

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Soil organic matter pools in a volcanic-ash soil under fallow or cultivation with applied chicken manure

European Journal of Soil Science ◽

10.1046/j.1365-2389.1998.4930427.x ◽

1998 ◽

Vol 49 (3) ◽

pp. 427-436 ◽

Cited By ~ 17

Author(s):

A. J. GIJSMAN ◽

J. I. SANZ

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Volcanic Ash ◽

Chicken Manure ◽

Volcanic Ash Soil

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Intensive Vegetable Production Degrades Volcanic Ash Soil in Cabintan, Ormoc City, Philippines

Science and Humanities Journal ◽

10.47773/shj.1998.141.3 ◽

2020 ◽

Vol 14 (1) ◽

pp. 36-53

Author(s):

Frances Mae Pizon ◽

◽

Anabella B. Tulin ◽

Keyword(s):

Organic Matter ◽

Soil Ph ◽

Volcanic Ash ◽

Chemical Properties ◽

Soil Management ◽

Available Phosphorus ◽

Vegetable Production ◽

Exchangeable Bases ◽

Physico Chemical ◽

Volcanic Ash Soil

Long-term intensive cultivation leads to soil-related problems. This study was conducted to know the changes in physico-chemical properties of volcanic ash soil (Andisol) in Barangay Cabintan, Ormoc City, Leyte after ten years of intensive vegetable production. Five sampling sites were selected, representing fallow and intensively cultivated areas. The soils were collected and analyzed for particle size analysis (PSA), bulk density (Db), soil pH, organic matter (OM), nitrogen (N), available phosphorus (P) and exchangeable bases potassium (K), magnesium (Mg), calcium (Ca), and sodium (Na). The findings of the current study were compared to the results reported by the ACIAR project ten years ago. The results revealed that the soil physico-chemical properties of Andisol changed within ten years. There were significant differences in soil physicochemical properties of Andisol across sites and depths as influenced by the two types of soil management over ten years. Soil management practices influenced the nutrient supplying capacity and the physico-chemical properties of the soil. Soil texture did not vary except for sites C and E (intensively cultivated areas). The bulk density remained low while the soil pH, soil organic matter, nitrogen, and exchangeable bases decreased. However, the available phosphorus increased under intensive vegetable production. The overall results highlighted the need to employ the appropriate soil management, specifically fertilizer application. An accurate and exact combination of organic and inorganic fertilizers is highly recommended in the area to obtain the desired vegetable yield.

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