Effect of organic and inorganic sources of nutrients on productivity and carbon sequestration of maize wheat cropping system

Abstract

The field experiment was conducted at Fodder Unit, CSK HPKV, Palampur from newlineKharif 2019 to Rabi 2020-21 to study the effect of organic and inorganic sources of newlinenutrients on productivity and carbon sequestration of maize-wheat cropping system. newlineThe soil of experimental field was silty clay loam in texture; acidic in nature; high in newlineorganic carbon; low in available nitrogen; medium in available phosphorus and newlinepotassium. The experiment was laid out in randomized block design with three newlinereplications, consisting of seven treatments i.e., 10 t ha-1 newlineFYM + 5% Jeevamrit, 10 t newlineha-1 newlineFYM + 10% Jeevamrit, 50% recommended N + 10 t ha-1 newlineFYM + 5% Jeevamrit, newline50% recommended N 10 t ha-1 newlineFYM + 10% Jeevamrit, seed treatment with Beejamrit newline+ 5% Jeevamrit, seed treatment with Beejamrit + 10% Jeevamrit and recommended newlineNPK through inorganic sources. Integration of nutrients using 50% recommend N + newline10 t ha-1 newlineFYM + 10% Jeevamrit resulted in better plant height (cm), number of newlineplants/tillers (m-2 newline), leaf area index, dry matter accumulation (g m-2 newline), yield attributes newlinewith higher grain yield (4.08 and 4.22 t ha-1 newline), stover/straw (6.72 and 7.28 t ha-1 newline) yield newlineand primary (NPK), secondary (Ca, Mg, S) and micronutrients (Zn, Fe, Cu, Mn, B) newlinecontent and uptake by both maize and wheat crops. Soil properties viz., soil pH, bulk newlinedensity, organic carbon, available primary (NPK), secondary (Ca, Mg, S), newlinemicronutrients (Zn, Fe, Cu, B), viable microbial count (bacteria, actinomycetes, fungi) newlineand microbial biomass carbon was increased with 50% recommended N + 10 t ha-1 newlineFYM + 10% Jeevamrit application. Application of recommended NPK resulted in newlinehigher mean net returns of maize and wheat 39.29 (and#8377; x 103 newline) and 52.64 (and#8377; x 103 newline) and newlineB:C ratio of 1.11 and 2.33, respectively newline