Response of rice (Oryza sativa) varieties to different levels of nitrogen under rainfed aerobic ecosystem
2014
Pradhan, Adikant | Thakur, A. | Sonboir, H.L.
A field experiment was conducted during 2011 and 2012 at Jagdalpur on the response of rice (Oryza sativa L) varieties to different levels of nitrogen. Plant height, leaf area-index, root volume and dry matter production were the highest with ‘Tulsi’ at 90 kg N/ha. Panicles/m², filled grains/panicle, grain (4.50 tonnes/ha) and straw yield and nitrogen uptake by grain and straw were also significantly higher with ‘Tulsi’. Increasing levels of nitrogen enhanced panicles/m², filled grains/panicle, grain and straw yield and nitrogen uptake by grain and straw only up to 90 kg N/ha. Varieties and nitrogen levels interacted significantly and the highest grain yield and economics were recorded with ‘Tulsi’ at 90 kg N/ha and it was found to be optimum combination for aerobic rice.
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