我国华北冬小麦生产影响评估模型的研究

An assessment model for effects of climate abnormity on wheat product ion in North China Plain

研究建立了我国华北冬小麦生产影响评估模型 (WHTMOD) ,该模型由小麦发育期模拟模型、光合生产模拟模型、产量形成模拟模型、土壤水分平衡和N素平衡动态模型等组成 ,综合考虑了光合作用、呼吸作用和同化物在器官中分配等生理过程以及温度、日长、CO2 、水分、N素等因子的影响 ,可模拟小麦生长发育与产量形成动态 ,反映气候异常对研究区域小麦生产的影响 。

An assessment model for effects of climate abnormity o n wheat production in North China Plain (WHTMOD) was built. WHTMOD consists of whe at phonology simulation model, photosynthesis simulation model, yield formation simulation model, water balance model, and nitrogen dynamic model. The physiolog ical processes such as crop photosynthesis, respiration, and distribution of bio mass among organs in wheat are considered in the model, and the effects of temp e rature, daylength, CO 2,water, and nitrogen are also considered. WHTMOD can be used to simulate the wheat growth, development and yield formation, and to expre ss the effects of climate abnormity on wheat production for studied areas. Valid ation of model shows that there is a good agreement between the simulated and ob served values.