Optimization of GA3, DAP and boric acid for maximizing seed yield and its quality parameters in hybrid rice

Abstract

The investigation was undertaken with rice hybrid NDRH-2 by accommodating a number of treatments viz., IR58025A, IR58025B, NDR3026-3-1R, foliar application of alone and combination doses of GA3 60,90 and 120 g/ha, DAP 1%, 2% and 3%, Boric acid 0.1%, 0.2% and 0.3% applied over CMS line days after anthesis (DAA) (10, 20, 30 and 40 days), seed treatment with thiram (2.5g/kg seed) at Student’s Instructional Farm and Seed Testing Laboratory (STL) of Acharya Narendra Deva University of Agriculture & Technology, Narendra Nagar (Kumarganj), Ayodhya during Kharif 2015-Kharif 2017. The experiment was laid out in Randomized Block Design (RBD) with three replications along with focusing observations on leaf numbers, plant height (cm), days to 50% heading, panicle exsertion (%), panicle length (cm), seed set (%) and yield (q/ha) were taken during the investigation. Application of GA3@120g/ha+ DAP@2% +Boric [email protected]% was optimized for maximizing the seed setting (32-33%), panicle exsertion (90-92%) and finally considerably seed yield (22-24 q/ha) which need to be experimented for CMS line IR58025A multiplication and hybrid seed production of rice hybrid NDRH2 in particular and as other promising hybrids in general.