Synergistic Effects of Combined Organic and Inorganic Nitrogen on Wheat Nutrient Uptake and Soil Fertility in Inceptisol of Eastern Uttar Pradesh, India

Abstract

A pot experiment was conducted during the year 2020 at the Institute of Agricultural Sciences, BHU, Varanasi, to study the impact of organic and inorganic sources of nitrogen on nutrient content in wheat and soil physic-chemical properties of the Inceptisols of eastern Uttar Pradesh. The experiment was arrangedin completely randomized design with 10 treatment combinations having three replications. The experiment results indicated that use of 50% of the recommended nitrogen dose through urea along with 50% N through poultry manure in integration significantly enhanced the nitrogen, phosphorus and potassiumcontent in grain and straw compared to the control. The T5 treatment, in which combined use of 50% RDN and 50% poultry manure recorded highest micronutrient concentrations (i.e. Zn: 14.3 and 21.41 mg kg−1, Cu: 37.83 and 20.66 mg kg−1, Mn: 20.03 and 3.65 mg kg−1, and Fe: 231.73 and 54.31 mg kg−1) in both straw and grain, respectively as compared to control (T1). The use of organic source with fertilizers also increased the post-harvest soil fertility as available N, P, and K, along with DTPA-extractable micronutrients. Overall, the treatment incorporating poultry manure @ 50% RDN and 50% PM (5.26 t ha−1) provided best results among all treatments in term of nutrient content of wheat and soil fertility.