Effect of different sources of sulphur on rice under rainfed lowlands

摘要

Efficiency of different sources of sulphur viz, pyrites, gypsum, elemental sulphur, ammonium sulphate and single superphosphate @ 20 kg ha~(-1) was compared with the recommended dose of 60:40:30 kg N: P_2O_5:K_2O ha~(-1) as urea, diammonium phosphateand muriate of potash (fertilizer without sulphur source) on rice variety Salivahana, under rainfed lowlands during 1993-94. Results showed that the grain yield increased significantly over control as well as NPK alone due to the addition of sulphur from different sources. The response of sulphur was 13 and 38 kg rice grain kg~(-1) S applied when single superphosphate and pyrite were used, respectively. Elemental sulphur, gypsum and ammonium sulphate were equally effective in increasing the grain yieldand were at par with pyrite.