Effect of Integrated Nutrient Management on Nutrient Uptake and Post-Harvest Soil Nutrients in Irrigated Sorghum (Sorghum bicolor L.)

The field experiment was conducted during kharif season of the year 2024 at Experimental Farm, Department of Agronomy, Faculty of Agriculture, Annamalai university to study the effect of Integrated nutrient management on nutrient uptake and post-harvest available nutrient status of irrigated Sorghum. The treatment T7 with 50% RDF + Vermicompost @ 2.5 t ha-1 + ZnSO4 @ 20 kg ha-1 + FeSO4 @ 25 kg ha-1 + Azophos @ 20 kg ha-1 recorded higher values of nutrient uptake with nitrogen, phosphorus and potassium and treatment (T4) recorded least values of nutrient uptake. The postharvest soil N, P and K were found to be significantly higher-Use word lower with the treatment (T7) - 50% RDF + Vermicompost @ 2.5 t ha-1 + ZnSO4 @ 20 kg ha-1 + FeSO4 @ 25 kg ha-1 + Azophos @ 20 kg ha-1. The lower-use word higher postharvest soil available nutrients were estimated under treatment (T4) -50% RDF + Azophos @ 20 kg ha-1. The experiment was laid out in randomized block design with three replications and seven treatments with Sorghum CO 30 as test variety. There were altogether seven treatments viz., T1-100% RDF (90:45:45 kg N: P2O5: K2O ha-1), T2-50% RDF + Vermicompost @ 2.5 t ha-1 , T3-50% RDF +ZnSO4 @ 20 kg ha-1 + FeSO4 @ 25 kg ha-1, T4-50% RDF + Azophos @ 20 kg ha-1, T5-50% RDF + Vermicompost @ 2.5 t ha-1 + ZnSO4 @ 20 kg ha-1 + FeSO4 @ 25 kg ha-1, T6-50% RDF + Vermicompost @ 2.5 t ha-1 + Azophos @ 20 kg ha-1, T7-50% RDF + Vermicompost @ 2.5 t ha-1 + ZnSO4 @ 20 kg ha-1 + FeSO4 @ 25 kg ha-1 + Azophos @ 20 kg ha-1.