Nano and water-soluble fertilizers on growth and yield of transplanted rice (Oryza sativa L.)

Abstract

A field experiment was conducted at the Instructional Farm, College of Agriculture, Vellayani during November 2023 to March 2024 to assess the the effect of nano-N, nano-P and water soluble fertilizers on the growth and yield of lowland rice. The field experiment was laid out in Randomized Complete Block Design (RCBD). The study comprised 8 treatments replicated thrice with Uma (MO 16) as the test varietry. The treatments were T1: Nano-urea (0.4%) at active tillering (AT) + Nano-urea (0.4%) at panicle initiation (PI), T2: Nano-DAP (0.4%) at AT + Nano-DAP (0.4%) at PI, T3: Potassium nitrate (0.5%) at AT + Potassium nitrate (0.5%) at PI, T4: Nano-urea (0.4%) at AT + Nano-DAP (0.4%) at PI, T5: Nano-urea (0.4%) at AT + PSAP (0.4%) at PI, T6: Nano-urea (0.4%) at AT + Potassium nitrate (0.5%) at PI, T7: Urea (2.0%) at AT + DAP (2.0%) at PI and T8: KAU POP. In all the treatments except T8, the recommended dose of nitrogen and phosphorus were reduced by 25 per cent and 50 per cent respectively. The treatment T5, resulted in higher grain yield, productive tillers per metre square, grains per panicle, tillers per metre square, leaf area per hill, LAI and flag leaf area per hill.