Growth Stage-Specific Response Of Basmati Rice To Organic Nutrient Sources: Nutrient Dynamics And Uptake Patterns

Abstract

The Field experiment was conducted during the kharif seasons of 2022 and 2023 at the Crop Research Center, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut, to study the impact of various organic nutrient sources on soil quality and the productivity of basmati rice in light-textured soils. The ten treatments consisting combination of different organic nutrient sources such as green manure (Dhaicha), farmyard manure (FYM), vermicompost, microbial consortia, and biostimulants were compared with chemical fertilizer (Recommended dose of NPK) and unfertilized (control). Nitrogen content was highest at tillering under with the application of RDF (1.82-1.86%), integration of organic treatments with consortia and biostimulants (T₄, T₈) maintained higher N at later stages. Phosphorus and potassium showed similar trends, with T₂ and T₄ consistently superior. Straw performed as the main sink for K. Total nutrient uptake was maximum under RDF (84.94 kg N, 23.36 kg P, 110.29 kg K/ha), closely followed by T₄ (82.04, 21.51, and 100.89 kg/ha). Integrated organics with biological amendments proved effective in sustaining nutrient supply and enhancing soil fertility in basmati rice.