Elemental sulphur application effects on nutrient availability and sweet maize (Zea mays L.) response in a high pH soil of Malaysia.

As plants grown in high pH soils usually suffer from nutrient deficiency, the present study was carried out to determine the influence of elemental sulphur as a soil acidulate on soil chemical properties and maize performance in a high pH soil of Malaysia. After 0, 20 and 40 days of soil incubation with different amounts of elemental sulphur (0, 0.5, 1 and 2 g S kg -1 of soil), maize plants were grown for 45 days under glasshouse conditions. Application of elemental sulphur at a rate of 0.5 g S kg -1 soil decreased soil pH value from the background level of 7.03 to 6.29 but significantly increased availability of Mn and Zn by 0.38% and 0.91%, respectively. This resulted in a 45.06% increase in total dry weight of maize. Further pH reduction due to the acidifying character of elemental sulphur at addition rates of 1 and 2 g kg -1 soil increased Mn and Zn availability, but significantly decreased maize performance. Overall, it can be concluded that when used in appropriate amounts, elemental sulphur can efficiently enhance soil fertility and maize performance by providing micronutrients for balanced fertilization.