Vol. 11, Special Issue 9 (2022)

Author(s):
Gireesh Kumar, Dr. Anurag, Dr. Vedhika Sahu, Dr. Pragya Pandey and Krishn Kumar

Abstract:
The present experiment was conducted during Kharif season 2020 at the Research Farm of Krishi Vigyan Kendra, Bemetara (CG). The experiment was laid out in randomized block design having three replications and eight treatments viz., T₁- Control (N₀:P₀:K₀), T₂ - 100% RDF (120:80:60), T₃ - 75% RDF + 20 t ha^-1 fly ash, T₄ - 75% RDF + 20 t ha^-1 fly ash + 2 t ha^-1 vermi-compost, T₅ - 75% RDF + 40 t ha^-1 fly ash, T₆ - 75% RDF + 40 t ha^-1 fly ash + 2 t ha^-1 vermi-compost, T₇ - 75% RDF + 60 t ha^-1 fly ash and T₈ - 75% RDF + 60 t ha^-1 fly ash + 2 t ha^-1 vermi-compost. The results of the field experiment revealed that yield and yield contributing characters of rice crops were significantly increased by applied fly ash with vermicompost over control. The highest grain and straw yield (29.25 and 65.22 q ha^-1, respectively) were recorded under T₆ - 75% RDF + 40 t ha^-1 fly ash + 2 t ha^-1 vermicompost followed by T₈ - 75% RDF + 60 t ha^-1 fly ash + 2 t ha^-1 vermicompost, T₇ - 75% RDF + 60 t ha^-1 fly ash and T₅ - 75% RDF + 40 t ha^-1 fly ash as compared to 100% RDF (20.92 q ha^-1 and 46.64 q ha^-1, respectively) and the lowest (9.73 q ha^-1 and 21.69 q ha^-1, respectively) was found under T₁ - Control (N₀:P₀:K₀). Among applied treatments, the increase in yield of 9% was observed with T₆ - 75% RDF + 40 t ha^-1 fly ash + 2 t ha^-1 vermicompost as compared to T₂ - 100% RDF shown an increase in yield as well as saving of 25% RDF. The yield attributing characters of rice (viz. plant height and effective tillers) were significantly increased by incorporation of fly ash and vermicompost over control, whereas test weight was not affected with applied treatments and was statistically at par. The higher effective tillers (9.33hill^-1) was noted under T₆ - 75% RDF + 40 t ha^-1 fly ash + 2 t ha^-1 vermicompost and T₈ - 75% RDF + 60 t ha^-1 fly ash + 2 t ha^-1 vermicompost treatments and the lowest (4.67 hill^-1) was recorded under (T₁) control. After the harvest of rice, different physico-chemical properties of soil were analysed and observed that soil pH, EC was non-significantly influenced with applied fly ash and vermicompost treatments, whereas the organic carbon, available nitrogen, phosphorus, and potassium in the soil after harvest rice crop were increased significantly over control. The highest soil organic carbon content (0.40%) was observed with T₈ - 75% RDF + 60 t ha^-1 fly ash + 2 t ha^-1 vermicompost followed by T₆ - 75% RDF + 40 t ha^-1 fly ash + 2 t ha^-1 vermicompost and the lowest (0.32%) was found under control. The highest soil available N (156.00 kg ha^-1) and available P (13.47 kg ha^-1) were observed under treatment 75% RDF + 60 t ha^-1 fly ash + 2 t ha^-1 vermicompost (T₈) and the lowest N and P (136 and 10.09 kg ha^-1) was found under control, respectively. The highest soil available K (309.00 kg ha^-1) was observed with applied T₆ - 75% RDF+40 t ha^‑1 fly ash + 2 t ha^-1 vermicompost and the lowest was noted under control treatment.