GROWTH AND YIELD PERFORMANCE OF INDIGENOUS AROMATIC RICE cv. CHINIGURA USING PGRs-NAA, GA3 AND DPA

Abstract

A field experiment was conducted to study the effect of NAA (Napthalene Acetic Acid), GA3 (Gibberellic acid), and DPA (Diphenylamine) on morpho-physiological, yield and yield characters of aromatic rice cv. Chinigura. The NAA, GA3 and DPA were applied 0, 30, 60 and 90 ppm at vegetative and pre-flowering stages. Results showed that the morpho-physiological, yield and yield attributes were significantly different among the PGRs studied under the application of their levels. There was a significant relationship among the PGRs and their levels on vegetative stage on plant height. The highest amount of total chlorophyll content (19.39 mg) was GA3 90ppm treatments while the lowest amount of total chlorophyll content (11.59 mg) was NAA on Control treatments. The highest proline content was found GA3 on 90ppm (0.37 mg) while the lowest proline content was found DPA on Control (0.24mg). The highest yield was in Chinigura rice variety (3.76 t ha-1 ) at 60 ppm GA3 application. Plant growth regulators promote the growth and yield of aromatic rice which might be an alternative eco-friendly tool for rice production. Out of the three PGRs, GA3 on Chinigura performed better considering growth and yield parameters. The spraying with 60 ppm GA3 had the better stimulation on growth and yield of Chinigura rice variety.