Vol. 12, Issue 10 (2023)

Author(s):
Varalakshmi V, Bhagyalakshmi T, Prakash SS, Ananthakumar MA, Roopashree DH and Ambruthavarshini

Abstract:
An experiment was conducted to study the effect of compost coated and blended phosphatic fertilizers on phosphorus dynamics and post-harvest nutrient status in Alfisols. The experiment was laid out in Randomized Complete Block Design and treatments that include 100, 75 and 50 percent of compost coated DAP (T₃, T₄ and T₅, respectively) and compost blended rock phosphate (T₆, T₇ and T₈, respectively) along with recommended dose of N and K, keeping 100% RDF (using uncoated DAP) as check which were replicated thrice. Results indicated that application of 75 percent RDP through compost coated DAP with recommended dose of N and K (T₄) recorded higher Saloid-P, Occluded-P, organic-P, WS-P and available P at harvest, whereas, higher Al-P, Fe-P, reductant soluble-P, Ca-P, Available N and K₂O content was recorded in T₂. Available Ca and Mg content was recorded higher in T₆ whereas, higher available S content was recorded in T₈.