Vol. 11, Issue 12 (2022)

Author(s):
SS Lakhawat and Uttam Shivran

Abstract:
The experiment was conducted under All India Coordinated Research Project on Fruits at Horticulture Farm, Rajasthan College of Agriculture, MPUAT, and Udaipur to evaluate the effect of integrated nutrient management on yield, quality and economics of guava. Application of T₇ treatment i.e. ¹/₂ RDF (i.e. 250:100:250 g NPK per tree, respectively) and 25 kg FYM with 250 g Azotobacter recorded higher fruit weight (205 g) and yield (35.26 kg/tree) over other treatments. Further, same treatment was found to be effective in improving plant height (4.95 m), canopy volume (238.60 m³), and leaf nutrient status (1.83, 0.41 & 1.81% NPK, respectively). However, fruit quality attributes i.e., maximum TSS (12.65^oB), and lower acidity (0.32%) were observed in T₂ treatment i.e. full dose of recommended dose of fertilizer (i.e. 500 g N: 200 g P₂O₅: 500 g K₂O/tree) with foliar spray of micronutrients (i.e. Zn (0.5%) + B (0.2%) + Mn (1%)) during August and October. Soil micro-organism counts were recorded maximum in the treatment T₁₀ (5.35 x 10⁸ per g soil) for bacteria and T₅ (6.80 x10⁴ per g soil) for fungus. Yield plant^-1 was significantly and positively associated with leaf nitrogen and potassium content.