Effects of nutrient management on yield and yield attributes of high yielding rice (Oryza sativa L.) varieties of Chhattisgarh

Abstract

Field Experiment was conducted at instructional cum Research Farm of Rajmohini Devi College of Agriculture and Research Station, Ambikapur (C.G.) during kharif season of 2016-17 to study the effects of nutrient management on yield and yield attributes of high yielding rice (Oryza sativa L.) varieties. The experiment was laid out in a split plot design with three replications. The treatments consisted of four nutrient management practices viz. M1-RDF (100: 60: 40 kg N:P2O5:K2O ha-1), M2-150% RDF, M3-RDF (N– LCC) (Basal application of 30% N and full P2O5+ K2O and top dressing of Nitrogen as per LCC) and M4-Soil test based recommended dose for 7.0 t ha-1 grain yield(214: 42: 111 kg N:P2O5:K2O ha-1) as main plots and five rice varieties viz. Rajeshwari, Durgeshwari, Maheshwari, Karma masuri and Indira Aerobic-1 as sub plots. Among the nutrient management, highest yield attributes were recorded under treatment M4-Soil test based recommended dose for 7.0 t ha-1 grain yield (214: 42: 111 kg N:P2O5:K2O ha-1) which was superior over other rest of the nutrient management practices. Among the varieties, longest panicle (24.56 cm) was measured in variety Indira aerobic-1, highest number of grains panicle-1 (151.74) and number of filled grains panicle-1 (126.66) was recorded with Karma masuri, highest number of panicle (367.00 m-2), test weight (31.27 g), grain yield (60.83 q ha-1), straw yield (117.96 q ha-1) and harvest index (34.17%) was recorded with variety Maheshwari.