Effect of fertility levels, genotypes and planting pattern on yield and economics of rice under SRI during dry season in coastal Odisha

Abstract

A field experiment was conducted during the Rabi seasons of 2012-2013 and 2013-2014 at the AgronomyMain Research Station of Orissa University of Agriculture and Technology, Bhubaneswar in Split Plot Design with three replications.Combinations of three fertility levels and two genotypes were taken in main plots and four different methods of planting were allotted to subplots. The fertility level with 3 splits of N @ 50 per cent at planting + 25 per cent top dressing at 30 DAS+25 per cent top dressing at 60 DAS (F2) recorded the significantly highest grain yield in the first year while F3 (organics) recorded highest grain yield in the second year. The HI for both the years were almost same (0.44). The hybrid ‘Arise gold’ produced significantly higher grain yield (6.82 t ha-1 in the first year and 6.39 t ha-1 in the second year) as compared to that of conventional variety Lalat (5.51 t ha-1 in the first year and 4.91 t ha-1 in the second year). The treatment of S2 i.e. 25 cm square planting with two spaced (5cm) seedlings hill-1 recorded significantly highest grain yield which was at par with the treatment S4-30 cm with three seedlings hill-1 in a traingular method. With respect to economics F2, the variety Arise gold and S2 recorded the highest gross return, net return and B : C ratio.