Relação entre atributos de solos e oxidação de enxofre elementar em quarenta e duas amostras de solos do Brasil

The use of elemental S as fertilizer can reduce costs in agriculture, but elemental-S must first be oxidized to sulfate-S to become plant-available. Little information is found in the literature about the capacity of Brazilian soils to oxidize elemental-S. This study was carried out with the objective of determining the oxidation rates of 42 soils samples from different Brazilian states to verify how soil attributes affect oxidation. Samples were collected in the A horizon (0-20 cm layer) and incubated in 150 mL glass flasks with 10 g kg-1 of S0 for 90 days, at 27 ± 1 oC. The samples of the 42 soils oxidized the elemental-S to sulfate-S at rates between 1.95 and 21.89 µg cm-2 day -1 of S0. The oxidation rate was positively related to soil organic matter content and inversely related to exchangeable aluminum and initial sulfur content of the soils. Soil pH and soil concentration of phosphorus, potassium, calcium, and magnesium had no effect on the oxidation rate of elemental-S.

[1]  S. Grayston,et al.  Effects of organic matter on sulphur oxidation in soil and influence of sulphur oxidation on soil nitrification , 1986, Plant and Soil.

[2]  P. Keller.  The effect of sodium chloride and sulphate on sulphur oxidation in soil , 1969, Plant and Soil.

[3]  H. Janzen,et al.  Factors affecting the oxidation of elemental sulfur in soils , 1993, Fertilizer research.

[4]  G. Blair,et al.  Effect of nutrients and elemental sulfur particle size on elemental sulfur oxidation and the growth of Thiobacillus thiooxidans , 1997 .

[5]  G. Blair,et al.  Influence of sulfur and phosphorus placement, and sulfur particle size, on elemental sulfur oxidation and the growth response of maize (Zea mays) , 1997 .

[6]  S. McGrath,et al.  Method to determine elemental sulphur in soils applied to measure sulphur oxidation , 1996 .

[7]  J. Schoenau,et al.  SHORT COMMUNICATION: Stimulation of elemental sulphur oxidation by sewage sludge , 1995 .

[8]  W. Lindemann,et al.  Organic Matter Stimulation of Elemental Sulfur Oxidation in a Calcareous Soil , 1993 .

[9]  R. Dick,et al.  SULFUR OXIDATION AND RHODANESE ACTIVITY IN SOILS , 1990 .

[10]  S. Grayston,et al.  Influence of crop rhizospheres on populations and activity of heterotrophic sulfur-oxidizing microorganisms , 1990 .

[11]  J. Watkinson.  Measurement of the Oxidation Rate of Elemental Sulfur in Soil , 1989 .

[12]  J. Lawrence,et al.  Relationship Between Microbial Biomass and Elemental Sulfur Oxidation in Agricultural Soils , 1988 .

[13]  H. Janzen,et al.  OXIDATION OF ELEMENTAL SULFUR UNDER FIELD CONDITIONS IN CENTRAL SASKATCHEWAN , 1987 .

[14]  G. Orbell,et al.  Factors influencing dissolution of phosphate rock and oxidation of elemental sulphur in some New Zealand soils , 1987 .

[15]  H. Janzen,et al.  MEASUREMENT OF SULFUR OXIDATION IN SOILS , 1987 .

[16]  M. McCaskill,et al.  Particle Size and Soil Texture Effects on Elemental Sulfur Oxidation 1 , 1987 .

[17]  M. Tabatabai,et al.  Oxidation of Elemental Sulfur in Soils , 1977 .

[18]  N. Barrow.  Slowly available sulphur fertilizers in South-western Australia 1. Elemental sulphur , 1971 .

[19]  G. Rehm,et al.  SULFUR SUPPLYING CAPACITY OF SOILS AND THE RELATIONSHIP TO SOIL TYPE , 1968 .

[20]  H. F. Rhoades,et al.  Factors Influencing the Availability of Sulfur Fertilizers to Alfalfa and Corn 1 , 1964 .