Vol. 10, Issue 12 (2021)

The present experiment entitled “Effect of nitrogen, phosphorus and potassium on growth, flower yield and quality of Stock (Matthiola incana)” was carried out in the Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during the month of November 2020 to March 2021. The experiment was conducted in Randomized Block Design replicated thrice with twelve treatments i.e., T₁ NPK (25:15:15) (g/m²) (RDF); T₂ NPK (10:12:15) (g/m²); T₃ NPK (12:12:15) (g/m²); T₄ NPK (15:15:15) (g/m²); T₅ NPK (20:15:15) (g/m²); T₆ NPK (20:20:20) (g/m²); T₇ NPK (22:20:20) (g/m²); T₈ NPK (25:25:25) (g/m²); T₉ NPK (27:25:30) (g/m²); T₁₀ NPK (30:25:30) (g/m²); T₁₁ NPK (30:30:30) (g/m²) and T₁₂ NPK (32:30:32) (g/m²).

The maximum plant height (34.80 cm), and number of leaves per plant (69.42) was observed in T₈ NPK (25:25:25) (g/m²). Days to bud initiation (42.19 days) and 50% flowering (60.38) was found to be least in T₈ NPK (25:25:25) (g/m²). The treatment T₈ NPK (25:25:25) (g/m²) has maximum number of flowers per spike (13.89), floret diameter (4.08 cm) and self-life (13.75 days). The number of spikes yield per plant (7.35), yield of spikes per plot (44.08) and yield of spikes per hectare (1653000 ha^-1) was recorded highest in T₈ NPK (25:25:25) (g/m²).