Evaluation of split application of nitrogen and potassium on semi-dry rice cultivation in Ramanathapuram, Tamil Nadu

Abstract

A field experiment was conducted during rainy (Rabi) season during 2014, 2015 and 2016 at Agricultural Research station, Paramakudi to evaluate the split application of nitrogen and potassium in semi-dry rice cultivation in Ramanathapuram district. The experiment was laid out in split plot design with three replications with Anna(R) 4, ADT 45 and Norungan local varieties. The sub plot consists five levels nutrients; the results revealed that the short duration rice variety Anna (R) 4 is suitable for semi-dry rice cultivation (2298kg ha-1) under drought conditions of Ramanathapuram district. Application of entire dose of P with 1/4th dose of N and 1/4th dose of K as basal application and remaining dose of N and K in three splits on vegetative, active tillering and panicle initiation stages recorded the good performance of plant growth (83.5 cm) and yield attributes viz., productive tillers/m2(147.1) and grains/ panicle (118.8). It will ultimately increase the grain yield (2652 kg ha-1) in semi-dry rice cultivation.