Effect of Different Levels of Nitrogen and Phosphorus on Yield and Nutrient Uptake of Low Glycemic Index Rice Variety RNR 15048 during Summer Season

Abstract

A low glycemic index fine rice variety RNR 15048 (Telangana Sona) suitable for both kharif and summer seasons was introduced in southern Odisha in 2019 kharif season. Its nitrogen and Phosphorus requirement was not worked out for kharif / rabi / summer seasons. An experiment was conducted during summer season of 2022 at M.S. Swaminathan School of agriculture (MSSSoA), Parlakhemundi, Odisha to study the effect of nitrogen and phosphorus levels on yield attributes and yield of low glycemic rice variety RNR 15048 in split plot design with four levels of nitrogen (0, 50, 100 and 150 kg/ha) in main plots and three levels of phosphorus (0, 30 and 60 kg/ha) in subplots replicated three times. The panicle number, number of spike lets per panicle, number of filled spike lets and 1000 grain weight, grain, straw and biological yield and NPK uptake in grain and straw increased significantly with increase in nitrogen levels from 0 to 50, 100 and 150 kg ha-1 and phosphorus level from 0 to 30 and 60 kg ha-1. For low glycemic index rice variety RNR 15048 during summer, application of 150 kg N and 60 kg P2O5 along with 50 kg K2O ha-1 found to give higher yield in southern Odisha.A low glycemic index fine rice variety RNR 15048 (Telangana Sona) suitable for both kharif and summer seasons was introduced in southern Odisha in 2019 kharif season. Its nitrogen and Phosphorus requirement was not worked out for kharif / rabi / summer seasons. An experiment was conducted during summer season of 2022 at M.S. Swaminathan School of agriculture (MSSSoA), Parlakhemundi, Odisha to study the effect of nitrogen and phosphorus levels on yield attributes and yield of low glycemic rice variety RNR 15048 in split plot design with four levels of nitrogen (0, 50, 100 and 150 kg/ha) in main plots and three levels of phosphorus (0, 30 and 60 kg/ha) in subplots replicated three times. The panicle number, number of spike lets per panicle, number of filled spike lets and 1000 grain weight, grain, straw and biological yield and NPK uptake in grain and straw increased significantly with increase in nitrogen levels from 0 to 50, 100 and 150 kg ha-1 and phosphorus level from 0 to 30 and 60 kg ha-1. For low glycemic index rice variety RNR 15048 during summer, application of 150 kg N and 60 kg P2O5 along with 50 kg K2O ha-1 found to give higher yield in southern Odisha.