Effect of fertility, genotypes and spacing on yield and soil properties of rice under SRI during dry season in coastal Odisha

Abstract

A study was carried out at the Agronomy Main Research Station, Orissa University of Agriculture and Technology, Bhubaneswar during the Rabi seasons of 2012-2013 and 2013-2014 in split plot design with three replications. The six main plots consisted of the combinations of three fertility levels and two genotypes; while the subplots had four different methods of planting. The pooled data for both the years revealed that the fertility level with 3 splits of N @ 50% at sowing + 25% top dressing at 30 DAS+25 per cent top dressing at 60 DAS (F 2 ) recorded the significantly highest grain yield (6424 kg ha —1 ) while HI (0.44) of highest value was recorded with F 3 (organics). The hybrid ‘Arise gold’ produced significantly higher (6606 kg ha —1 ) grain yield as compared to that of conventional variety Lalat (5214 kg ha —1 ). The treatment of S 2 -25 cm square planting with two spaced (5cm) seedlings hill —1 recorded significantly highest grain yield (6811 kg ha —1 ) whichwas atpar with the treatment S 4 -30 cm with three seedlings hill —1 ina traingular method (6642 kg ha —1 ). In case of grain nutrient uptake F 3 , V 1 (hybrid ‘Arise gold’) and S 2 recorded the highest value whereas in straw F 2 , V 1 (Lalat) and S 3 (30 cm with two seedlings with a gap of 5cm between 2 seedlings hill —1) recorded the highest uptake. The highest pH was recorded with F 3 . F 2 , V 2 and S 1 (25 cm with one seedling hill —1 ) recorded the highest EC while the highest organic carbon percentage was recorded in F 2 , V 2 and S 4 (30 cm with three seedlings with a gap of 5cm between 2 seedlings in a triangular method hill —1 ). The highest available soil N, P and K was recorded with F 3 , V 2 and S 1 . F 3 recorded the highest value in microbiological properties.