EFFECT OF N AND P ON THE PERFORMANCE OF SPINACH (Spinacia oleracea) IN ROOFTOP AND FARM

Abstract

The experiment was conducted at the rooftop of Soil Science Department and research farm of Sher-e-Bangla Agricultural University, Dhaka, during the period from October 2020 to December 2020 to study the performance of spinach in the rooftop and farm. The experiments were laid out in RCBD design with three replications. The study consists of two factors. Factor A: Three levels of nitrogen N₀ (control), N₁ (56 kg ha¯¹), and N₂ (84 kg ha¯¹), and Factor 2: Three levels of phosphorus P₀ (control), P₁ (36 kg P 2 O 5 ha¯¹) and P₂ (57.5 kg P 2 O 5 ha¯¹). Haldibari, local variety seed was used in this experiment. Different growth and yield contributing parameters were recorded to determine the optimum dose of N and P for growing on rooftop and farm. The result reveals that N₁ (56 kg ha¯¹) is optimum dose for growing spinach on both rooftop and farm whereas, P₁ (36 kg P 2 O 5 ha¯¹) and P₂ (57.5 kg P 2 O 5 ha¯¹) are optimum dose for rooftop for farm condition respectively. Among the treatment combination, N₁P₁ (56 kg/ha N + 36 kg/ha P₂O 5 ) seems to be more suitable for getting higher yield in both rooftop and farm.