Effect of Elemental Sulfur on Availability of Phosphorus and Micronutrient Cations for Wheat Grown on a High Terrace Soil of Northern Sudan
2012
Osman, A.M.
This study involved two experiments, the first experiment (incubation) was carried out at Gezira Research Station while the second experiment (field) at Dongola Research Station farm to study the effect of elemental sulfur on some chemical soil properties and wheat grown under high terrace soils of northern region of Sudan. The incubation experiment was executed to quantify the rates and application time of elemental sulfur to be applied in the field experiment. It consisted of five rates of elemental sulfur (0, 165, 330, 495, and 660 kg sulfur feddanE-1) and five application times (2, 4, 6, 8, and 10 weeks). Completely randomized design, with four replications was used in this trial. In the field experiment, two wheat varieties (Wadi Elneel and Debeira), three sulfur rates (0 kg S feddanE-1, 495 kg S feddanE-1 and 660 kg S feddanE-1) and three time application times (0, 5 and 7 weeks) were arranged in split plot design with four replications. Wheat varieties were assigned to the main plots and the combination of the rates and time application to the sub plots. Results obtained from the incubation experiment indicated highly significant differences in soil pH, Mn, Cu, Zn and Fe among treatments. Application of elemental sulfur decreased soil pH in each of the two experiments. The effect of elemental sulfur on wheat grain yield and the other studied yield components was not statistically significant except for the plant height and the 1000 seed weight. The nitrogen content of the plant tissue was significantly affected by the applied elemental sulfur. Application of 495 kg sulfur feddanE-1, 6 weeks before sowing gave the lowest soil pH and the highest available phosphorus compared to other treatments
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