Effect of nitrogen and potassium on yield of dry direct seeded rice cv. NERICA 1 in aus season

Abstract

Nitrogen and potassium are the yield-limiting nutrients in rice production regions of Bangladesh. Use of efficient N and K dose is an important complementary strategy in improving rice yield and quality and reducing cost of production. In order to assess the influence of nitrogen and potassium on the yield response of NERICA 1 rice in Aus season, an experiment was carried out in Bangladesh during April to August 2011. The experiment encompassed five levels of nitrogen viz., 0, 20, 40, 60 and 80 kg N ha -1 from urea and four levels of potassium viz. 0, 20, 40 and 60 kg K2O ha -1 from muriate of potash have been applied using randomized complete block design with three replications. Results revealed that application of nitrogen at 80 kg ha -1 produced the highest number of total spikelets and maximum number of grains panicle -1 resulted in the highest grain yield. In case of potassium, the highest number of total tillers and effective tillers, maximum number of total spikelets and grains panicle -1