Impact of Various Organic and Inorganic Sources of Fertilizers on Yield, Yield Attributes, and Nutrients Accumulation in Direct Seeded Basmati Rice

Afield experiment was carried out at CCS HAU, College of Agriculture, Kaul farm during kharif 2019, to study the effects of different organic, inorganic, and integrated sources on yield, yield attributes, nutrients accumulation, and economics of direct seeded basmati rice. The experiment was planned in a randomized block design with ten treatments including NPK, biogas slurry and vermicompost along and in combination. The treatments N_37.5 P₁₅ K₁₅ + Vermicompost @ 4 t ha⁻¹ and N_37.5 P₁₅ K₁₅ + Biogas slurry@ 4 t ha⁻¹ were at par in plant height, effective tillers², harvest index, grain and straw yields of rice crop, but statistically superior over control. Yield attributes and straw yields, in thesetreatments were at par with N₇₅ P₃₀ K₃₀. Similar trend was observed in nutrient content (NPK) and their uptake by crop. However, micronutrient's content and their uptake in rice s increased with the application of vermicompost or biogas slurry (2 and 4 t ha) alone or with integrated use ofinorganic fertilizers. Highest benefit: cost (B:C) ratio was observed in N₇₅ P₃₀ K₃₀ compared to organic manures because of getting higher reruns and lower cost of cultivation.