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

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.