Response of Integrated Nutrient Management on Physico-chemical Properties of Soil of Rice in Inceptisols of Prayagraj, India

Abstract

The experiment for the two consecutive years, beginning from kharif season pooled data of two years 2023 and 2024 at Research Farm, Department of Soil Science and Agricultural Chemistry, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj district of Uttar Pradesh. The maximum temperature of the location reaches up to 460C - 480C and minimum temperature is 40C - 5 0C. The relative humidity ranged between 20 to 94 percent. The average rainfall in this area is around 1100 mm annually. The experiment was laid down in Randomized Block Design (RBD) with sixteen treatments of rice which replicated thrice. The INM treatments in the rice were included T1:(Control), T2:RDF @ 100%, T3:RDF @ 100%+ @ 50% Zn SA,  T4:RDF @ 100%+ @ 100% Zn SA,  T5:RDF @ 50% + @ 0.5 % Zn  foliar application,  T6:RDF @ 100 %+  @ 0.5 % Zn foliar application,  T7:RDF @100% + @ FYM 100%,  T8: RDF @ 50% +@ 50% FYM + @ 50%Zn  SA,  T9: RDF @ 100% + @ 100% FYM + @ 100% Zn SA,  T10: RDF @ 50% + @ 50% FYM + @ 0.5% Zn foliar application,  T11: RDF@100 %  +@100 %  FYM + @ 0.5% Zn foliar application, T12: RDF @100% +@100% Vermicompost, T13: RDF @50% + @50% Vermicompost + @ 50% Zn SA,  T14: RDF @100% + @100% Vermicompost + @ 100% Zn  SA,  T15: RDF @ 50%+ @50% Vermicompost + @ 0.5% Zn foliar application and  T16: RDF @100% + @100% Vermicompost + @ 0.5% Zn foliar application.  ZnSO4 soil application @ 25 kg ha-1 as basal dose, foliar application of 0.5 % Zn solution at different days after transplanting.  The treatment plot size is 2x2m.  The soil sample was analyzed for bulk density, particle density, %pore space, water holding capacity (%), pH, EC, %Organic carbon, Available N,P, K and Zinc. The results revealed that the application of T14: RDF @100% + @100% Vermicompost + @ 100% Zn  SA non-significantly minimum  bulk density (1.078 and 1.097),  pH (6.82 and 6.81) and EC (0.214 and 0.216 dS m-1) after harvest of rice at 0-15 and 15-30 cm depth in pooled data of two years 2023 and 2024 and significantly maximum  particle density (2.64 and 2.66), %pore space (49.51 and 49.50), water holding capacity (52.22 and 52.00%),  %Organic carbon (0.552 and 0.548) after harvest of rice at 0-15 and 15-30 cm depth in pooled data of two years 2023 and 2024. It was observed that the treatment comprising of T14: RDF @100% + @100% Vermicompost + @ 100% Zn SA registered higher values of available nitrogen (250.173 and 232.852 kg ha-1), available phosphorus (35.397 and 30.114 kg ha-1), available potassium (220.790 and 215.877) and Zinc (0.582 and 0.572 mg kg-1) after harvest of rice at 0-15 and 15-30 cm depth in pooled data of two year 2023 and 2024.