Productivity, profitability, energetics and nutrient uptake of post kharif rice-cowpea preceded by rice varieties grown under different establishment methods

Abstract

A field experiment was conducted at Agronomy Main Research Farm, Department of Agronomy, College of Agriculture, OUAT, Bhubaneswar, Odisha during of 2014-15 and 2015-16 to evaluate the productivity, profitability, energetics and nutrient uptake of post kharif rice-cowpea preceded by rice varieties grown in kharif under different establishment methods. The treatments comprising three establishment methods (Direct Seeded Rice, Non Puddled Transplanted Rice and Puddled Transplanted rice) and three variety/hybrids of rice (‘Arize 6129’, ‘Arize 6444’ and ‘Swarna’) were tried in split plot design with three replications. The Puddled Transplanted Rice (PTR) recorded the maximum rice equivalent yield (8.43 t ha-1) for post kharif rice-cowpea which was at par with NPTR (8.34 t ha-1) and the minimum of 6.85 t ha-1 was recorded under Direct Seeded Rice (DSR). The total cowpea biomass yield was the maximum under NPTR and the minimum under DSR. The maximum gross return of 1,20,380/-, total energy output of 2,25,045 MJ ha-1 and energy use efficiency of 8.59 was recorded under PTR, NPTR and DSR, respectively. Uptake of nitrogen was higher under NPTR while phosphorus and potassium uptake values were higher under PTR. The rice cultivar/hybrids grown in kharif had no significant effect on yield, economics, energetics and uptake of nutrient, but hybrid ‘Arize 6129’ recorded higher mean values than hybrid ‘Arize 6444’ and cv. ‘Swarna’.