Effect of Integrated Nutrient Management on NPK Content in Green Gram (Vigna radiata L.)

Green gram is an important native pulse crop extensively cultivated across South and the Southeast Asia. Considering the simultaneous challenge of preserving soil health and improving input-use efficiency, the evaluation of integrated, environmentally sustainable nutrient management strategies become imperative. Hence, the present study was designed to examine the effects of organic manures, chemical fertilizers, and cow based bioformulations on nutrient content and nutrient uptake in green gram. Therefore, this field experiment was conducted during the Kharif season of 2023 at Research Farm, Krishi Vigyan Kendra-Mahendergarh, CCS Haryana Agricultural University, Hisar. The experiment consisted of total nine treatments T₁ (Control), T₂ (RDN through FYM), T₃ (RDF + 5.0 t FYM ha⁻¹), T₄ (75% RDF + 7.5 t FYM ha⁻¹), T₅ (RDN through Vermicompost), T₆ (RDF + 2.5 t Vermicompost ha⁻¹), T₇ (75% RDF + 5.0 t Vermicompost ha⁻¹), T₈ (Cow based bio formulation), T₉ (RDF) that were laid out in Randomized Block Design (RBD) with three replications. Application of RDF + 2.5 t VC ha-1 (T₆) exhibited 16.17% higher seed N content than Control (T₁), 10.00 % higher than cow based bio formulation (T₈), 6.02% higher than RDN through FYM (T₂), and 4.76% higher than RDN through VC (T₅). Similarly, RDF + 2.5 t VC ha-1 (T₆) exhibited 22.00% higher seed P content than control (T₁), 19.60% higher than cow based bio formulation (T₈), 12.96% higher than RDN through FYM (T₂), and 10.90% higher than RDN through VC (T₅). Similarly, RDF + 2.5 t VC ha-1 (T₆) exhibited 10.84% higher seed K content than control (T₁), 9.52% higher than cow based bio formulation (T₈), 6.97% higher than RDN through FYM (T₂), 5.74% higher than RDN through VC (T₅). Overall, these findings underscore the effectiveness of integrated nutrient management practice of RDF + 2.5 t Vermicompost in enhancing nutrient use efficiency of green gram cultivation.