Interaction Effect of Nitrogen, Phosphorus, Potassium with Sulphur, Boron and Zinc on Yield and Nutrient Uptake by Rice Under Rice - Rice Cropping System in Inceptisol of Coastal Odisha

A replicated field experiment was conducted for two years in Inceptisol of coastal Odisha to investigate the integrated effect of major (N, P, K), secondary (S) and micronutrient (B and Zn) on yield, nutrient accumulation and uptake by rice. The results revealed that highest significant grain yield of 76.70 q ha was recorded when the crop received all the nutrients (N, P, K, S, B and Zn). The yield was decreased by 19.4 – 27% due to omission of N, P, K or P,K and by 17.1 – 32.6 % in absence of S, B, Zn individually or in combination. Combined application of all the nutrients increased nutrient accumulation and uptake. Omission of N, P, K or N&P from the fertilizer schedule decreased the N, P and K uptake by 40.7 – 50.5, 13.9 -20.4 and 33.046.9% respectively. Among the micro and secondary nutrients, deletion of B greatly affect the N, P and K uptake as compared to Zn and S. Integrated use of N, P and K with S, B and Zn recorded highest grain yield response (37.23 kg grain per kg of the fertilizer applied). It was reduced by 44-49 % in absence of P or K and by 8% in absence of B, Zn, S.