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Apsim winter wheat simulator#
Capability in the agricultural production systems simulator (APSIM) model to simulate the impacts of shading on crop performance could be particularly useful, as the model is already widely used to simulate agricultural crop production. A major component of this interaction is the impact of shade from trees on crop growth and yield. Results from climate change analysis show that increasing the temperature from 0 to 5 ☌ leads to a maximum reduction of 75% in grain yield and an increase in carbon dioxide concentration, resulting in a maximum increase of 24% and, if the temperature increase exceeds three degrees Celsius, the grain yield will decrease in all possible concentrations of carbon dioxide.A number of agroforestry models have been developed to simulate growth outcomes based on the interactions between components of agroforestry systems. The evaluation of model shows high performance and its possible use in other studies. Normalized RMSE in all treatments has been below 17.8%, with Wilmot's index being above 0.82. Results from the model evaluation show that the simulated values closely predict the observed values so that the RMSE in both regions is less than 670 and 450 kg/ha for biomass and yield, respectively, being below 0.56 for leaf area index as well.
Apsim winter wheat full#
Model parameterization is based on observational data from full irrigation and 200 kg/ha nitrogen treatment in both regions. Irrigation is considered as main plot and nitrogen as a sub-plot. The experiments have been conducted in both regions as split-plot in a randomized complete block design.
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The model is used to simulate leaf area index, dry matter, and grain yield of Roshan cultivar winter wheat in Karaj and Khomein regions between 20, under four irrigation regimes and three levels of nitrogen fertilizers. The present research has been conducted to parameterize and evaluate the APSIM-Wheat model for winter wheat and to use the model for evaluation of climate change effects on grain yield. Candidate, Agronomy and Plant Breeding Department, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.Īssistant Professor, Agronomy and Plant Breeding Department, College of Agriculture and Natural Resources, University of Tehran, Karaj, IranĪssociate Professor, Agronomy and Plant Breeding Department, College of Agriculture and Natural Resources, University of Tehran, Karaj, IranĪssociate Professor, Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Parameterization and evaluation of APSIM-Wheat model for winter wheat : Application of model under climate change