Response of Nano DAP on Crop Growth, Yield and Quality of Groundnut (Arachis hypogaea) in East and South Eastern Coastal Plain Zone of Odisha, India

Abstract

The study conducted during rabi (Jan–May, 2024) at Instructional farm, OUAT, Bhubaneswar, Odisha, India to investigate the effect of nano Diammonium Phospahe (DAP) on growth, yield and quality of groundnut (Arachis hypogaea) in an acid Inceptisols. The experiment was laid out with 11 treatments combination in randomised block design with three replications. Treatments T10 (T4 + ST with Nano DAP at 10 ml L-1 of water and FS with Nano DAP at 2.5 ml L-1 of water at 35 DAS and 50 DAS) resulted in higher pod yields followed by T7 (T4 + ST with Nano DAP at 7.5 ml L -1  Water +Twice FS with Nano DAP at 2.5 ml L -1  of water at 35 DAS and 50 DAS) which was the yield obtained with 100% of  STD for N and P as soil application. Whereas the lowest yield was obtained in T11(absolute control). The findings revealed that the highest benefit-to-cost (B:C) ratio of 2.19 was associated with treatment T10 (T4 +ST with Nano DAP at 10 ml L-1  of water and FS with Nano DAP at 2.5 ml L-1  of water at 35 DAS and 50 DAS) followed by T7 (2.17) [T4+ST with Nano DAP at7.5 ml L -1  Water+Twice FS with Nano DAP at 2.5 ml L-1  of water at 35 DAS and 50 DAS] with reduced application of STD of conventional fertilizers at 50% along with foliar application of nano DAP found economically more sustainable. The results regarding the effect of nano DAP on post-harvest soil showed no significant changes in any of the soil parameters.