Effect of Planting Methods and Nutrition on Yield of Three Rice Varieties

Rice (Oryza sativa L.) is the most important cereal crop. The effect of planting methods and nutrition on the yield of three rice varieties was assessed under the greenhouse. Factorial experiment, three cultivation methods [dry direct seeding (DDS), wet direct seeding (WDS) and transplantation (TP)], three nutrient levels, [100% inorganic, 50% inorganic +50% organic and 100% organic], and three rice varieties (Pathumthani-1, RD57, and RD41) was considered with the layout of completely randomized design (CRD) with four replications. Moreover, yield and yield components data were collected from the rice plant. ANOVA was carried with IRRISTAT 5.0. The result showed that 100% inorganic level had more productive tiller than the other two levels. 50% inorganic +50% organic under DDS method, 100% organic under WDS and 100% inorganic under TP method had performed well on filled grain per panicle. However, all varieties suffered from the nutrient deficit under the TP method which caused high unfilled grain under 100% inorganic and 50% inorganic+50% organic and 100% organic levels were decreased by 21.05 under the DDS method. Finally, seed weight was high for Pathumthani-1vareity with no significant difference among the variety, but RD57 reduced by 13.88% under WDS than the TP method and no difference was found for RD41 under TP and WDS methods. The yield of Pathumthani-1 variety was increased by 22% under TP than WDS and DDS methods. The nutrient level has no significant differences on grain yield of RD41 variety. RD57 grain yield was high under TP and DDS methods and no significant difference was found for RD41 under TP and WDS methods of cultivation.