Influence of Integrated Nutrient Management on Nutrient Content and Nutrient Uptake in Rice (Oryza sativa L.)

The present study was conducted during the kharif season of 2023 at the Instructional Farm, CSAUAT, Kanpur, to assess the effects of integrated nutrient management (INM) on nutrient content, nutrient uptake of rice (Oryza sativa L.). The experiment consisted of eight treatments involving different combinations of recommended doses of fertilizers (RDF), farmyard manure (FYM) and vermicompost (VC), arranged in a randomized block design (RCBD) with three replications. The results demonstrated that the integrated application of 75% RDF + FYM + VC (T₅) significantly improved nitrogen (1.33%), phosphorus (0.496%), and potassium (0.293%) content in rice grain as compared to the control treatment. Similarly, the maximum nutrient uptake was recorded under T5, with the values of 79.42 kg ha⁻¹ nitrogen (N), 28.50 kg ha⁻¹ for phosphorus (P), and 97.92 kg ha⁻¹ for potassium (K), representing marked improvement over control and sole RDF treatments. The superior performance of T₅ may be attributed to the synergistic interaction between organic and inorganic nutrient sources, which enhanced nutrient availability, improved soil physical and biological properties and increased nutrient uptake efficiency. Overall, these findings underscore the effectiveness of INM in enhancing nutrient use efficiency and sustaining higher productivity of rice cultivation by reduced dependency on chemical fertilizers under alluvial soil conditions.