Vol. 11, Special Issue 9 (2022)

Author(s):
Saheed Garnaik, PK Samant, J Nayak and S Sahu

Abstract:
Nutrient management under rice-rice production became a critical issue for a tropical rice production. Rice cultivation is getting tougher over due to mismanagement of plant required nutrients. Hence, we planned to explore this area with 9 treatments and 4 replications in a long-term rice-rice production system. These were control, N, NP, PK, NPK, NPK+Zn, NPK+B+Zn, NPK+S+Zn, NPK+FYM+Lime. Different combinations of nutrients showed variation in yield, nutrient uptake and nutrient use efficiencies. Boron uptake was highest in FYM treated plots followed by boron applied plots (NPK+B+Zn). Sulphur uptake was ~8 kg ha^-1 in NPK+FYM+Lime plots compared to control and ~59% in comparison to NPK applied plots. Boron uptake was 21.7% higher in FYM treated plots (NPK+FYM+Lime) in compared to boron supplied plots (NPK+B+Zn). Inter utilization efficiency was 16.1% higher in NPK plots compared to NPK+FYM+Lime plots. Imbalance fertilization application (N and NP) had increased the nutrient demand for crop with higher internal utilization efficiency. Physiological efficiency for P and K was 2.1 and 3.7% higher in compared to NPK. Intensive rice cultivation with proper nutrient management can improve the rice yield.