ZESZYT Nr 2 / 2010 Abstrakty Volume No 2/2010 Abstracts |
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| 3.Assessment of the effect of
sulphur supplied to the soil with mineral fertilizers and waste from magnesium sulphate production on its content in spring wheat (Triticum aestivum L.) and in soil effluents - Krzysztof Gondek, Michał Kopeć Abstract. The assessment of the effect of fertilization on the plant, soil and sulphur losses as a result of leaching was conducted in a pot experiment. The experiment was conducted in three replications and two series: without liming (0 Ca) and limed (+ Ca) on 6 treatments: 0 – soil without fertilizers, NPK – soil fertilized with nitrogen, phosphorus and potassium, NPK + S1 a.s. – soil fertilized with nitrogen, phosphorus, potassium and sulphur supplied as am- monium sulphate, NPK + S1 w. – soil fertilized with nitrogen, phosphorus, potassium and sulphur supplied with the waste from magnesium sulphate production and NPK + S3 a.s. – soil fertilized with nitrogen, phosphorus, potassium and sulphur supplied as ammonium sulphate in a dose three times bigger than introduced to the soil on NPK + S1 a.s. and NPK + S1 w. treatments. Spring wheat was cultivated in each year of the experiment. The sulphur content in the prepared experimental material (plant, soil and effl uent) was assessed by means of ICP-AES method on JY 238 Ultrace apparatus. An average (over three years) total yield of spring wheat (grains, straw and roots) at comparable values of standard error of arithmetic mean for individual treatments was the highest after sulphur application in the form of ammonium sulphate. In comparison with biomass yields from the treatments where a lower sulphur dose was used, either as ammonium sulphate or the waste from magnesium sulphate production, smaller biomass yield was obtained in the treatment where sulphur was applied in a dose which was thrice as high. Weighed arithmetic mean of the sulphur content in grains, straw and roots of wheat fertilized with sulphur was signifi cantly higher than the content assessed in wheat biomass not fertilized with this element. Increasing sulphur dose did not cause any signifi cant differences in this element content in wheat biomass. A single soil fertilization with smaller sulphur doses either as ammonium sulphate or as waste from magnesium sulphate production did not cause any lasting fertilizer effect, a result of removal of sulphur with the crop and its leaching from soil. Sulphur fertilization, either as ammonium sulphate or as waste from magnesium sulphate production led to an increased sulphur content in soil effl uents. The amounts of this element in leaching waters were affected mainly by the quantity of sulphur supplied to the soil with fertilization and, to a lesser degree, by the plant yields. key words: fertilization, sulphur, spring wheat, soil, soil effl uents |