Comprehensive Evaluation Method on Chilling Damage of Tobacco Based on GIS and Entropy Weight Theory

As the research on the harm degree of chilling damage on the tobacco in the transplanting seedling stage, to carry out the early warning and assessment of chilling damage to reduce meteorological disaster, the use of three meteorological index: negative accumulated temperature, the chilling days and extreme minimum temperature, to calculate the weight of each index in entropy weight coefficient method, and constructs the disaster index model and analyzed the space distribute occurred frequency of chilling damage by GIS tool.