Response of levels and split application of nitrogen on yield and economics in pre-monsoon established rice (Oryza sativa L.)

Abstract

Direct seeded rice is a system of cultivation gaining importance under water constraint situations and research on optimum dose and time of nitrogen application is timely warranted. In the present study, the research results concluded that direct seeded rice responded up to 150 kg ha-1 nitrogen with five splitting of nitrogen. The highest grain yield (38.73 q ha-1), cost of cultivation (23410 Rs. ha-1), gross return (Rs. 56603 ha-1), net return (Rs. 33193 ha-1) and B:C ratio (2.42) was obtained from 150 kg ha-1. Similarly in case of splitting of nitrogen, highest grain yield (39.59 q ha-1), cost of cultivation (23272 Rs. ha-1), gross return (Rs. 57798 ha-1), net return (Rs. 34526 ha-1) and B:C ratio (2.48) was recorded under five splitting of nitrogen i.e. S6 (20:20:20:30:10 at 10-12, 20, 40, 60, DAS & flowering). Rate of nitrogen @ 100 kg N ha-1 with three splitting i.e. S1-3 Splits (20:50:30 at 0, 30, 60 DAS) gives lower results as compare to other treatments. Application of nitrogen at 10 DAS observed higher grain yield as compared to basal application at respective levels of splitting. Thus, nitrogen application of 150 kg N ha-1 in six splits - (20:20:20:30:10 at 10-12, 20, 40, 60, DAS & flowering) is considered a suitable nitrogen management technique in direct seeded rice cultivation at Raipur (C.G.).