Parameter Estimation and Verification of the DSSATModel of Winter Wheat for Simulation and Development in North China

DSSAT crop model is used to carry out estimation and verification on the model parameters of the major winter wheat variety (Jimai-22) in typical experimental sites of North China. Based on the field experiment data of 12 crops with sufficient-irrigation and non-sufficient irrigation during two continuous winter wheat planting seasons in the survey regions of Daxing District, Beijing and Tangshan, Hebei, the DSSAT model is used for verification, estimation and verification schemes for genetic coefficients of different crop varieties are developed and compared. We evaluate the reliability and applicability of growth & development and yield response of winter wheat in North China in the DSSAT model in the conditions of water stress and non-sufficient irrigation, verify and assess different model calibration schemes, and finally select a set of optimal crop model parameters as the basis of simulating crop optimal irrigation system, so as to provide data support for the optimal irrigation system in North China.