Effect of different nitrogen levels on growth, yield and economics of red rice cultivars (Oryza sativa L.)

Abstract

The experiment entitled “study the different nitrogen levels on growth, yield and economics of red rice cultivars” was carried out at College of Agriculture, IGKV, Raipur (C.G.) during kharif season in split plot design within three replications by taking five red rice cultivars viz., Bantha luchai, Shrikamal, Kankadiya, Khuddi and Jyothi in main plots and four nitrogen levels i.e. 0, 60 kg, 80 kg N ha-1 and 25 kg N ha-1 as basal dose + LCC (Leaf colour chart) based N management in sub-plots. Analysis revealed that cultivar Shrikamal recorded maximum plant height at harvest and maximum number of tillers plant-1 recorded with variety Jyothi which was closely followed by Khuddi at harvest. Among nitrogen levels, significantly higher plant height and number of tillers were recorded with application of 80 kg N ha-1. Significant higher grain yield, net return and benefit-cost ratio was recorded with variety Jyothi and in case of different nitrogen levels, application of 80 kg N ha-1 and 25 kg N ha-1 + LCC based nitrogen management produced significantly higher grain yield. However, by the application of 80 kg N ha-1, higher net return and benefit-cost ratio was obtained which was comparable with 25 kg N ha-1 + LCC based nitrogen management. The maximum straw yield was recorded with 80 kg N ha-1 and it was not influenced by cultivars. Significant interaction effect was noted in plant height, number of tillers plant‑1 and grain yield. Highlight Performance of red rice cultivars under different levels of nitrogen Optimize the dose for different red rice cultivars Choose a good yield and economics providing cultivars