Nitrogen management is an important agronomic measure to regulate rice yield and grain quality. A field experiment was conducted at Central Research Station, Odisha University of Agriculture and Technology, Bhubaneswar during kharif season of 2021. The experiment was laid out in a randomised block design with four replications comprising of five treatments viz., Soil Test Based Nitrogen Recommendation (STBNR) complete inorganic, Integrated Nutrient Management (INM) (50% organic*+ 50% inorganic) *Organic= 1/3rd FYM+ 1/3rd poultry manure+ 1/3rd neem oil cake, Organic source (1/3rd FYM+ 1/3rd poultry manure+ 1/3rd neem oil cake), Soil Test Based Nitrogen Recommendation (STBNR)+ ZnSO4 @ 25 kg/ha and Integrated Nutrient Management (T2) + ZnSO4 @ 25 kg/ha. The soil was loamy sand, slightly acidic in reaction, medium in organic carbon, available P2O5 and K2O, and low in available nitrogen. The nitrogen management practices influenced the growth parameters viz; plant height, dry matter accumulation, and LAI. INM+ZnSO4 treatment recorded higher growth parameters and crop growth indices followed by INM and STBNR+ZnSO4.

Nitrogen, Rice, CGR, RGR, Integrated Nutrient Management

Among all the nitrogen management practices INM+ZnSO4 influenced the growth parameters viz., plant height, dry matter accumulation, LAI, and crop growth indices more effectively. The results clearly indicated the need for integrated nitrogen management for optimum growth of rice.

Pragyan Das and Bijay Kumar Mohapatra (2022). Growth Parameters of Rice Crop as influenced by Sources of Nitrogen Management. Biological Forum – An International Journal, 14(4a): 786-788.