International Journal of Environment and Climate Change

A field experiment was conducted during kharif 2020 at Chaudhary Charan Singh Haryana Agricultural University, Krishi Vigyan Kendra farm, Fatehabad, (Haryana) to evaluate the effect of combined application of organic manures and fertilizers on the soil nutrients status under the rice cultivation. The experiment comprised of 14 treatments combination of organic manures and chemical fertilizers viz. T₁ (Control), T₂ (100% Recommended dose of Nitrogen through urea], T₃ (75% RDN + 25% N through Farm Yard Manure), T₄ (50% RDN + 50% N through FYM), T₅ (25% RDN + 75% N through FYM), T₆ (100% N through FYM), T₇ (75% RDN + 25% N through Vermicompost), T₈ (50% RDN + 50% N through Vermicompost), T₉ (25% RDN + 75% N through Vermicompost), T₁₀ (100% N through Vermicompost), T₁₁ (75% RDN + 25% N through Poultry manure), T₁₂ (50% RDN + 50% N through Poultry manure), T₁₃ (25% RDN + 75% N through Poultry manure) and T₁₄ (100% N through Poultry manure) which were replicated thrice each. The results revealed that soil nutrient status was influenced variably by the application of different sources. Different combinations had no significant effect on soil pH and EC while the organic carbon (OC) increased with increased application of organic manures. The significantly higher macronutrients were observed under treatment 100 % N through Poultry manure i.e., N (120.30 kg ha^-1), P (19.13 kg ha^-1), K (237.20 kg ha^-1) and S (33.91kg ha^-1) as compared to control which recorded N (98.97 kg ha^-1), P (12.63 kg ha^-1), K (200.90 kg ha^-1) and S (30.33 kg ha^-1) while the significantly higher DTPA extractable micronutrients (Zn, Fe, Cu and Mn) were observed under the treatment where 100 % N was applied through Vermicompost.