The Oxidation of Sulfur in Soils as a Means of Increasing the Availability of Mineral Phosphates

Lipman, Jacob G.; Director,; McLean, H. C.; Lint, H. Clay

doi:10.1097/00010694-191606000-00002

Cited by 21 publications

(5 citation statements)

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“…The S-shaped (sigmoidal) oxidation curve has been noted previously (Janzen and Bettany, 1986) and several other studies have found a pronounced lag phase (Gleen and Quastel, 1953;Lettl et al, 1981;Lipman et al, 1916;Wainwright et al, 1986). The reasons for this lag period are not clear.…”

Section: Discussionmentioning

confidence: 75%

“…The oxidation of sulphur in soil has been studied since the beginning of the century (Lipman et al, 1916) and has recently been reviewed (Wainwright, 1984). It is known that the oxidation rate increases with decreasing particle size (Fox et al, 1964;Koehler and Roberts, 1983;Laishely et al, 1986;Li and Caldwell, 1966) and with increasing temperature (Janzen and Bettany, 1987b;Li and Caldwell, 1966;Nor and Tabatabai, 1977;Skiba and Wainwright, 1984).…”

Section: Introductionmentioning

confidence: 99%

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Oxidation of micronized elemental sulphur in soil

Chapman¹

1989

Plant Soil

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The rate of oxidation of micronized elemental sulphur in three soils was measured over a range of temperatures between 2 and 20~ Temperature had a marked effect with a Q10 (temperature coefficient) between 1.9-3.1. The period for 50% oxidation varied between 6-10 days at 20~ to between 36-42 days at 2~ All the oxidation curves showed an initial lag. At 20~ the oxidation rate was four times that of flowers of sulphur and was related to the smaller particle size. Additives (wetting and dispersing agents) in the commercial micronized sulphur preparation used ('Thiovit') were inhibitory at high concentrations but stimulatory at low concentrations. The significance to field conditions is discussed.

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Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Oxidation of micronized elemental sulphur in soil

Chapman¹

1989

Plant Soil

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“…For RPR to be effective, soils need to supply sufficient hydrogen ions to dissolve P from RPR enough to match plant demand for P (Ellis et al 1955;Kanabo and Gilkes 1987;Rajan et al 1991). The concentration of hydrogen ions in soil may be increased by biological oxidation of elemental sulphur (S) (Germida and Janzen 1993), so applying S with RPR enhances dissolution of P for plant production (Lipman et al 1916;Kittams and Attoe 1965;Rajan 1981Rajan , 1983Rajan , 2002. Unfortunately, most of these studies were carried out under conditions favourable to oxidation of S and dissolution of RPR, namely in pots in which soils were maintained at moisture levels close to field capacity (FC), or under field conditions in soil exposed to high rainfall (e.g.…”

Section: Introductionmentioning

confidence: 99%

Influence of rates of reactive phosphate rock and sulphur on potentially available phosphorous in organically managed soils in the south-eastern near-Mediterranean cropping region of Australia

Evans

Price

2008

Nutr Cycl Agroecosyst

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Reactive phosphate rock (RPR) is the only phosphorous (P) fertiliser allowed for organically managed, broad-acre crop-pasture systems in southern Australia. However, soils are usually deficient in P, and the soils, climate, and plant species grown, do not promote extensive dissolution of RPR so the fertiliser is poorly effective for crop and pasture production. Biological oxidation of elemental sulphur (S) mixed and applied with RPR may sufficiently increase dissolution of P from RPR to improve its effectiveness as a P fertiliser. However, this needs to be confirmed in field studies in the region. Rates of RPR and S required to optimise dissolution of RPR are not known for the soils, environments, and agricultural systems used. Both pot and field studies showed that mixing RPR and S, and incorporating the mix into soil (top 10 cm for field studies), significantly increased Olsen P and soil solution P, even in strongly acidic soils (pH Ca \ 4.6). In general, Olsen P increased linearly with the applied rate of P up to 42-70 kg P ha -1 and the rate of change in Olsen P per unit of applied P increased with the applied rate of S up to 400 kg S ha -1 . This interaction suggested that the effectiveness of RPR ? S may be compromised by segregation of RPR and S. In addition, there was evidence that S application may not necessarily create a more acidic soil environment necessary for enhanced dissolution of RPR.

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“…Sulphur seemed to increase the availability of phosphorus in the soil, at least in soils rich in lime (Lipman et al 1916, Tottingham and Hart 1921, Chapman 1936). Sulphur addition increased the mineralization of nitrogen from organic material (Scott and Robertson 1926).…”

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confidence: 99%

Sulphur status in Finnish cultivated soils

Korkman

1973

AFSci

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A method for determining total sulphur in plant material and soil samples using the induction furnace technique and subsequent turbidimetric determination of sulphate sulphur was discussed. A procedure for extracting sulphur from soil samples with ammonium acetate (pH 4.65), the interference of the organic matter being reduced by oxidation of the extract with H2O2, was proposed. Sulphur balance in Finnish cultivated soils was estimated by taking into account the average amounts of emitted (8 kg S/ha/yr.), precipitated (8 kg S/ha/yr.) and leached (8 kg S/ha/yr.) sulphur. The actual situation in the cultivated soils seems thus to be depending, on an average, on the uptake by plants and the sulphur applied (12 kg S/ha/yr. in the early 1970s). In 104 samples of cultivated soil, the content of total sulphur showed a slight correlation with the content of organic carbon. The amounts of sulphur extracted in various ways were not predictable by means of the soil characteristics used (pHCaCl2, org. C and texture). Extracted sulphur did not correlate sufficiently with the development and sulphur uptake of plants. Under field conditions in northern Finland, sulphur application produced a relatively distinct result in respect both to the ley yields on Carex peat, and their sulphur content. On mineral soils in southern Finland the yields were unaffected by supplementary fertilization with sulphur. In the pot experiments performed a fairly close relationship between sulphur and nitrogen was demonstrated.

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The Oxidation of Sulfur in Soils as a Means of Increasing the Availability of Mineral Phosphates

Cited by 21 publications

References 0 publications

Oxidation of micronized elemental sulphur in soil

Oxidation of micronized elemental sulphur in soil

Influence of rates of reactive phosphate rock and sulphur on potentially available phosphorous in organically managed soils in the south-eastern near-Mediterranean cropping region of Australia

Sulphur status in Finnish cultivated soils

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