Vol. 8 No. 2
Response of different nitrogen levels and homo-brassinolide on yield and economics of hybrid rice (Oryza sativa L.)
Abstract: A field experiment on hybrid rice (PHB-71) was conducted during kharif seasons of 2009 and 2010 in Agriculture farm, Institute of Agriculture, Sriniketan, Visva-Bharati, Birbhum, West Bengal. To study the agronomic evaluation of nitrogen and homo-brassinolide on productivity, correlation and economics of hybrid rice (Oryza sativa L.). Hybrid rice PHB-71 was tested with five nitrogen levels viz. N0, N50, N100, N150and N200 kg ha-1 and three levels of homo-brassinolide [no spray (BR0), PI stage (BR1) and flowering stage (BR2)]. The individual effect of nitrogen and homo-brassinolide on yield was found significant. Nitrogen 150 kg ha-1 gave the highest grain yield and harvest index but maximum straw yield were found under nitrogen 200 kg ha-1. In case of homo-brassinolide, spraying at PI+flowering gave the highest grain yield, straw yield and harvest index. Application of nitrogen 150 kg ha-1 with two foliar spray of homo-brassinolide was recorded higher net Return (Rs.37200 and Rs.39101), net returns per rupee invested (Rs.2.17 and 2.33) and benefit:cost ratios (1.17 and 1.33) during 1st year and 2nd year 2009 and 2010, respectively.
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