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Information Journal Paper

Title

STUDY OF THE EFFECT OF MICRONUTRIENT ENRICHED SULFUR FERTILIZER APPLICATION IN A CALCAREOUS SOIL

Pages

  95-103

Abstract

 Considering the production of more than 2 million tons of sulfur per year and in order to create a basis for application of agricultural sulfur in PLANT NUTRITION and farmland reclamation, the National Petrochemical Company of Iran, has produced an agricultural Sulfur enriched with iron (Fe), zinc (Zn) and manganese (Mn). There is little information available on the quality of these products and the reaction of these fertilizers in soil and available sulfur for plant. The present study was conducted to investigate oxidation potential and sulfur release in soil and influence on changes in rate of sulphate and available MICRONUTRIENTS in a calcareous soil. Soil sample was collected from vicinity of Karaj city and agricultural sulfur with Thiobacillus inuculant was throughly mixed with 1 kg of soil at the equivalent rates of 0, 300 and 600 kg.ha-1. The samples as randomized complete design with three replications were incubated under 25oC and 80% of field capacity for 180 days, and in time periods (45, 90, 135 and 180 days after incubation) subsampled. Sulphate, iron, zinc and manganese concentrations were determined. The results showed that incubation time has a significant effect on changes in available sulfur, iron, zinc and manganese. In general, regardless of the type of agricultural sulfur, the different level of fertilizers increased sulphate, zinc and manganese concentrations. Type of fertilizer only had significant effect on zinc concentration. The mean increase of available Zn for agricultural sulfur containing zinc was 3.2 times.

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