Impact of integrated nutrient management on yield of wheat and phosphorus release pattern in vertisol

Abstract

The present investigation entitled " Impact of integrated nutrient management on yield of wheat and phosphorus release pattern in Vertisol " was conducted during the Rabi season of 2022-2023 at Research Farm, College of Agriculture, Nagpur.The experiment was laid out in Randomized Block Design with seven treatments comprises T1:GM + 100%RDF, T2: Ghanajivamrut 5 t ha-1 at incorporation of GM + 50% RD of NP through inorganic fertilizer + jivamrut + Azophos, T3: Vermicompost 5 t ha-1 at incorporation of GM + 50% RD of NP through inorganic fertilizer + jivamrut + Azophos, T4: Neem cake 2 t ha-1 at incorporation of GM + 50% RD of NP through inorganic fertilizer + jivamrut + Azophos, T5: Ghanajivamrut 5 t ha-1 at incorporation of GM + jivamrut + Azophos, T6: Vermicompost 5 t ha-1 at incorporation of GM + jivamrut + Azophos, T7: Neem cake 2 t ha-1 at incorporation of GM + jivamrut + Azophos with three replication. The result revealed that, the levels of available phosphorus in the soil at various growth stages of wheat were found to be significant. It is observed that the treatment involving vermicompost 5 t ha-1 at incorporation of GM + 50% RD of NP through inorganic fertilizer + jivamrut + azophos resulted in significantly higher available phosphorus levels in the soil, with measurements of 19.01 kg ha-1 at the tillering stage, 20.88 kg ha-1 at the flowering stage, and 23.31 kg ha-1 at the harvesting stage of wheat. The result also indicates that, the highest grain yield of wheat (30.50 q ha-1) was achieved with the application of T1 and it was found at par with T3 (28.53 q ha-1) and T2 (26.06 q ha-1). The significant higher straw yield of wheat was observed (40.48 q ha-1) with T1 which was found at par with T3 (37.97 q ha-1). The result showed that, the efficiency of inorganic fertilizers is likely increased when applied with well-decomposed organic manure, leading to improved grain yield.