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Yield gap analysis under different water and nitrogen management practices in wheat crop using CSM-cropsim-ceres –wheat model in Tarai region of Uttarakhand

Water and nitrogen are two primary limiting factors for wheat yield. In consonance with this, field experiment was conducted at Norman Ernest Borlaug Crop Research Centre in Pantnagar (Uttarakhand) during Rabi season of 2017-18 to analyze the performance of CSM-CROPSIM-CERES-wheat model for wheat cultivar . | Int.J.Curr.Microbiol.App.Sci 2020 9 11 317-324 International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 9 Number 11 2020 Journal homepage http www.ijcmas.com Original Research Article https doi.org 10.20546 ijcmas.2020.911.038 Yield Gap Analysis under Different Water and Nitrogen Management Practices in Wheat Crop using CSM-CROPSIM-CERES Wheat Model in Tarai Region of Uttarakhand Shweta Pokhariyal Ravi Kiran A.S. Nain and Amit Bijlwan Department of Agrometeorology Govind Ballabh Pant University of Agriculture and Technology Pantnagar Uttarakhand India Corresponding author ABSTRACT Water and nitrogen are two primary limiting factors for wheat yield. In consonance with Keywords this field experiment was conducted at Norman Ernest Borlaug Crop Research Centre in Wheat CSM- Pantnagar Uttarakhand during Rabi season of 2017-18 to analyze the performance of CROPSIM-CERES- CSM-CROPSIM-CERES-wheat model for wheat cultivar PBW-502 grown under Wheat model different stress conditions characterized by inducing different water and nitrogen levels. 27 Abiotic stress treatment combinations consisted of 3 DOS 12 th December 22nd December and 02nd Genetic January 3 irrigation levels 100 irrigations 75 irrigations and 50 irrigations and 3 coefficients Yield nitrogen levels 100 75 and 50 of recommended nitrogen doses laid in a Factorial gap RBD with 3 replications. The results revealed good agreement between simulated and measured data of crop phenology LAI and grain yield. The simulated and observed yield Article Info ranged between 1.5 to 4.95 t ha and 1.42 to 4.73 t ha respectively. RMSE was found to be 11.61 with R2 value of 0.90 which is found significant. The model performance was Accepted validated with the experimental dataset of year 2007-2008 by using genetic coefficients 04 October 2020 obtained during calibration process. Degree of stress in wheat crop was analyzed in terms Available Online of yield gap which was found higher 68. 28 under .