Vol. 11, Issue 9 (2022)

Author(s):
Hena Rani Deo, T Chandrakar, LK Srivastava, NK Nag, DP Singh and Akash Thakur

Abstract:
A field experiment has been conducted during kharif 2021 at Shaheed Gundadhoor College of Agriculture and Research Station, Jagdalpur, Chhattisgarh on effect of Nano-DAP on nutrient use efficiency and yield of rice with six treatments and four replications viz. T₁ RDF(100% NPK), T₂ (25% P+ 100% N, K + root dipping, and one foliar spray of Nano DAP at 20-25 DAT), T₃ (25% P+ 100% N, K + root dipping with nano and two foliar sprays of Nano DAP at 20-25 DAT and 45-50 DAT), T₄ (50% P+ 100% N, K + root dipping, and one foliar spray of Nano DAP one foliar spray of Nano DAP at 20-25 DAT), T₅ (50%P+ 100% N, K +root dipping, and two foliar sprays of Nano DAP at 20-25 DAT and 45-50 DAT) and T₆ (Control). The soil was sandy loam in texture with slightly acidic in nature and low in organic carbon status. The available nitrogen was low while phosphorus and potassium were medium. T₅ (50% P+100% NK+root dipping and two foliar spray of nano-DAP at 20-25 DAT and 45-50 DAT) was found the most significant on performance over other treatments except T₁ on yield. The agronomic use efficiencies for N, P and K under T₅ were 31, 103.4 and 77.6 kg grain/ kg nutrient applied which were better among other treatments. Similarly, nutrient use and production efficiencies for N, P and K under T₅ were significantly higher over rest of the treatments. Therefore, we may suggest for 50% P+100%NK+root dipping and two foliar spray of Nano-DAP at 20-25 DAT and 45-50 DAT for better realization of applied nutrients in terms of nutrient use efficiencies and yield responses.