Vol. 12, Issue 8 (2023)

Author(s):
Deepika Sahu, Rakesh Banwasi, K Tedia, LK Shrivastava, Tapas Chaudhuri, Gaurav Jatav, Nainsi Naya, Biplab Chaudhury and Rakesh Paul

Abstract:
A field experiment was carried out in research farm, IGKV, Raipur, Chhattisgarh, India during Rabi 2021-2022 and Kharif 2022-2023 under rice-wheat cropping system at Research Farm, College of Agriculture, Raipur, (IGKV). The experiment was laid out with 12 treatments of rice and wheat in randomized block design. Treatments of rice in Kharif season includes (T₁) Absolute Control (N0:P0:K0), (T₂) 0% P (Control P0); (NPK @ 120:0:40), (T₃) 100% P through DAP (NPK @ RDF 120:60:40), (T₄) 75% P through DAP (NPK @120:45:40), (T₅) 50% P through DAP (NPK @120:30:40), (T₆) T₄ + Root Dipping @ 5 ml /L + Foliar Spray @ 2 ml/ L at 30 DAT with Nano DAP, (T₇) T₄ + Root Dipping @ 5 ml /L + Foliar Spray @ 4 ml/ L at 30 DAT with Nano DAP, (T₈) T₅ + Root Dipping @ 5 ml /L + Foliar Spray @ 2 ml/ L at 30 DAT with Nano DAP, (T₉) T₅ + Root Dipping @ 5 ml /L + Foliar Spray @ 4 ml/ L at 30 DAT with Nano DAP, (T₁₀) T₅ + Root Dipping @ 5 ml / L + Foliar Spray @ 2 ml / L at 25 and 45 DAT with Nano DAP, (T₁₁) T₅ + Root Dipping @ 5 ml / L + Foliar Spray @ 4 ml / L at 25 and 45 DAT with Nano DAP and (T₁₂) T₅ + Seed Treatment @ 5 ml / kg seed + Foliar Spray @ 4 ml / L at 30 DAT with Nano DAP. Treatments of wheat in Rabi season includes (T₁)0% NP (Control); N0P0K40, (T₂) 100% NP through G-DAP (NPK as RDF @ N120: P60: K40, (T₃) T₁+ ST with N-DAP @ 5 ml/ kg seed, (T₄) T₁+ ST with N-DAP @ 10 ml/ kg seed, (T₅) T₁ + FS with N-DAP @ 0.6% at 25-30 DAG, (T₆) T₁ + ST with N-DAP @ 5 ml/ kg seed + FS with N-DAP @ 0.6% at 25-30 DAG, (T₇) T₁₂ + FS with N-DAP @ 0.2% at 25-30 DAG, (T₈) T₁₂ + ST with N-DAP @ 5 ml/ kg seed + FS with N-DAP @ 0.2% at 25-30 DAG, (T₉) 50% NP (N60 P30 K40) + FS with N-DAP @ 0.4% at 25-30 DAG, (T₁₀) 50% NP (N60 P30 K40) + ST with N-DAP @ 5 ml/ kg seed + FS with N-DAP @ 0.4% at 25-30 DAG, (T₁₁) Absolute Control (0-0-0), (T₁₂) 75% NP through G-DAP (NPK @ 90:45:40). The results proved that the combined application of conventional and nano DAP had a positive influence on most of the growth parameters. In rice treatments (T₃) 100% P through DAP (NPK @ RDF 120:60:40), (T₆) T₄ + Root Dipping @ 5 ml /L + Foliar Spray @ 2 ml/ L at 30 DAT with Nano DAP and (T₇) T₄ + Root Dipping @ 5 ml /L + Foliar Spray @ 4 ml/ L at 30 DAT with Nano DAP obtained significantly higher plant height, effective tillers per hill, panicle length, panicles per meter square, grain yield and straw yield. In wheat treatments (T₂) 100% NP through DAP (NPK as RDF @ N120: P60: K40) and (T₈) 75% NP through DAP + ST with N-DAP @ 5 ml/ kg seed + FS with N-DAP @ 0.2% at 25-30 DAG obtained significantly higher plant height, ear heads per meter square, grain yield and straw yield.