Authors
1
PhD Student of Soil Science Department, Lorestan University, Khoramabad, Iran
2
Assistant Professor. Soil Science Department, Lorestan University, Khoramabad, Iran
3
Associate Professor. Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
4
Associate Professor. Soil Science Department, Lorestan University, Khoramabad, Iran
Abstract
Nutrient status in some soils shows that in some high-nutrient soils, nutrient availability is not enough for optimum growth and development of plants because of high soil pH. For that reason, in arid and semi-arid regions, organic matter and acid compounds is added to reduce the soil pH. Elemental sulfur (S) is the most important compound used to acidify soil. In the suitable conditions of humidity, temperature, ventilation, elemental sulfur is being converted to sulfuric acid by microorganisms. This study was carried out to investigate the effects of sulfur on nutrient availability by wheat in a randomized completely block design with five levels of sulfur (no, 500, 750, 1500 and 3000 Kgha-1 (as elemental sulfur)) in three replications for two years under farm conditions. First and second year results showed that the different treatment had significant effects (p<0.01) on soil pH, sulfate concentration, availability of phosphorus, potassium, iron and manganese. Moreover, in second year, the results indicated that the availability of zinc (p<0.01) and the availability of copper also increased significantly (p<0.05). The most phosphorus (34.567 mgKg-1) and iron (5.64 mgKg-1) content obtained in treatment with 1500 Kgha-1 of sulfur in the first year. Whereas the most zinc (4.107 mg.Kg-1) obtained in 1500 Kgha-1 of Sulfur treatment and the most manganese (19.38 mgKg-1) and copper (1.143 mgKg-1) obtained in 3000 Kg.ha-1 Sulfur treatment in second year.
Keywords
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