Influence of sulphur application and water management practices on sulphur nutrition, growth and yield of rice in some sulphur deficient wet land rice soils.

摘要

A green house experiment was conducted to study the effect of sulphur application and five water management practices on mineral nutrition, growth and yield of rice in six different S-deficient wetland rice soils. Under continuously flooded condition, rice plants showed characteristic S-deficiency symptoms and produced lowest grain yield and dry matter. Application of fertilizer S or soil drying for 2 weeks during active tillering or panicle initiation stage and reflooding increased crop yield by eliminating S-deficiency. Soil drying and reflooding influenced Mg, S, Fe, Mn, Zn and Cu nutrition of rice, favourably, which together accounted for 89% variability in rice grain yield.