Influence of the nitrogen-sulfur fertilizing on the content of different sulfur fractions in soil
2011
Kulhanek, M., Ceska Zemedelska Univ., Prague (Czech Republic) | Cerny, J., Ceska Zemedelska Univ., Prague (Czech Republic) | Balik, J., Ceska Zemedelska Univ., Prague (Czech Republic) | Vanek, V., Ceska Zemedelska Univ., Prague (Czech Republic) | Sedlar, O., Ceska Zemedelska Univ., Prague (Czech Republic)
Precise field experiments were established at 3 sites with winter oilseed rape under different soil-climatic conditions in the Czech Republic (Humpolec, Hnevceves and Uhrineves) in the years 2008-2010. Four fertilizing treatments with increasing S rate were evaluated. The levels of bioavailable (SW), adsorbed (Sads), occluded (Socl), and hydroiodic acid (HI) reducible (SHI) S were measured. The concentrations of the fractions within the studied sites in the samples collected before fertilizers application were comparable. The SW, Sads and Socl conc. did not exceed 10 mg S/kg. The SHI conc. differed depending on site and year. Fertilizing using S as CaSO4 positively influenced SW, Sads and SHI conc. in soil. Sulfur fertilizing had also positive tendencies to increase rape yields but the differences between the treatments were not significant.
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