Effect of conjoint application of organic sources with chemical fertilizers on nutrients availability in soil, growth and yield of Indian mustard”

Abstract

A field experiment was conducted to assess the effect of conjoint application of organic sources with chemical fertilizers on nutrients availability in soil, growth and yield of mustard at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut (U.P.), during rabi season of 2021-22. The eight treatments consisting the conjoint application of organic sources with chemical fertilizers of mustard were tested in RBD with three replications. Pusa Vijay was grown as a test variety. Soil of experimental field was sandy clay loam in texture low in available nitrogen, organic carbon, medium in available phosphorus and potassium with alkaline in reaction. The result revealed that additional application of 25% NPK over the RDF did not resulted any significant improvement in seed yield of mustard and most of the growth and yield parameter. Substitution of 25% N through Poultry manure or Vermicompost produced statistically similar to 100% NPK applied through chemical fertilizer however farm yard manure could not exert its effect yielded significantly lower than 100% NPK. Sub optimal as well as organic fertilization resulted in significantly lower seed yield than 100% NPK. Soil pH remain unaffected due to application of different treatments but electrical conductivity and organic carbon differ significantly. Higher values were recorded in treatments of integration or organic fertilization. At harvest availability of nutrient was slightly higher in treatments of organic fertilization and integration. Total nitrogen, phosphorous, potassium and sulphur uptake by mustard crop 128.67, 33.17, 136.80 and 28.19 kg ha-1 respectively was maximum with the application of 125% NPK on the basis of experiments it can be conducted that 25% nitrogen nutrition of mustard crop can be substituted through the application of poultry manure and vermicompost. These treatments also improved the soil fertility than 100% NPK. Although organic fertilization also improved soil fertility but yield decline significantly. Oil content improved due to organic fertilization. And also organic treatments improved the physio chemical properties of soil which may improve the sustainability of production system.