随着全球气候变暖，极端灾害天气的发生呈增多增强趋势，因此，加强重大农业气象灾害的影响分析和损失评估研究对保障粮食安全、提高农业生产水平具有重要意义。高温热害是中国水稻生产中遇到的重要农业气象灾害之一。针对目前水稻高温热害评估技术还不完善的现状，本研究拟在控制试验和田间试验的基础上，分析关键发育期高温对水稻光合速率、物质分配等生长过程的定量影响及其灾后恢复机制，明确不同发育期高温与产量构成因子的定量关系，并构建相应的模型；讨论高温发生情形下光合速率、物质分配、产量构成因子变化的内在关系，并将上述定量关系纳入项目组早期研制的水稻生长模型，实现水稻生长模型对高温事件的响应，最后构建基于过程模型的水稻高温热害损失定量评估方法。

With global climate warming, abnormal disaster weather events become more frequent and powerful. So, it is significant for ensuring food security and improving agricultural production level to enhance the study about early-warning and evaluating techniques on important agro-meteorological disasters. Heat injury due to high temperature is one of the common agro-meteorological disasters forrice production in China. Because the evaluating technique on rice heat injury is lack and heat events become more frequent and powerful, so this study will focus on developing an evaluation technique based on the process model to quantitate the yield loss due to rice heat injury. First, according to the control and field　experiments, the response pattern of yield component to high temperature would be analyzed. Second, the effect models of high temperature on photosynthesis and dry matter partition and their relations to yield component response patterns would be discussed. Final, all above effect models of high temperature would be coupled into the existing rice growth model developed by our research group to construct the process model-based evaluation method due to rice heat injury.