冬小麦生长与土壤-植物-大气连续体水热运移的耦合研究Ⅰ:模型  

Study on coupling between winter wheat growth and water-heat transfer in soil-plant-atmosphere continuum Ⅰ. Model

作　　者：丛振涛[1] 雷志栋[1] 胡和平[1] 杨诗秀[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水利学报》2005年第5期575-580,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金重点项目(59839320)

摘　　要：本文开展了冬小麦生长与土壤-植物-大气连续体(简称SPAC)水热运移的耦合研究,建立了可以同时动态模拟冬小麦生长过程与SPAC水热运移过程的动力学模型WheatSPAC模型。模型中,采用有限元差分格式进行土壤水热运移的数值模拟;采用双层模型进行冠层水热运移的模拟;采用改进的Feddes根系吸水模型及负指数分布形式的根系密度模型,实现土壤与冠层的耦合;通过生育阶段、干物质生产、干物质分配等过程的模拟,建立了冬小麦生长的机理性模型;通过对冬小麦叶面积指数、株高、根系分布的模拟,实现冬小麦生长与SPAC水热运移的耦合。The WheatSPAC model describing the coupling between winter wheat growth and the water-heat transfer in Soil-Plant-Atmosphere Continuum (SPAC) is developed to dynamically simulate the growth of wheat and the process of heat transfer simultaneously. The model is consisted of a soil model, a canopy model and a model for wheat growth. In the soil model, the finite element method is applied to simulate the movement of the soil water and heat. By introducing the improved Feddes mode and the root density distribution model in negative form the coupling of canopy model with SPAC model is realized. Based on the simulation of the leaf area index, crop height and root distribution the SPAC model is coupled with the winter wheat growth model, namely WheatSPAC model.

关 键 词：冬小麦 土壤-植物-大气连续体/SPAC 作物生长模型 灌溉 腾发 作物-水分 

分 类 号：S152.7[农业科学—土壤学]