摘要
作物生长模型是农业数字化技术的核心。橡胶树光合与干物质积累模拟模型的研究将为橡胶树数字化技术的研究与应用奠定基础。采用面向对象的C++为开发语言,以QT前台图形用户界面为开发平台,以SQL Server 2005为后台数据库,在气象资料数据库的支持下,按模块化的思想进行设计,构建了橡胶树光合与干物质积累模拟系统。基于单叶光合速率的光响应模型和冠层光的分布规律,通过积分形式,构建了橡胶树冠层光合作用模拟模型。模型充分量化了光通量密度、温度、叶面积指数、单叶最大光合速率、光合作用特征参数、消光系数、群体反射率等因子对橡胶树冠层光合速率的影响。在分别确定了叶片和木质器官与主要环境因子作用关系的基础上,构建了橡胶树的群体呼吸作用模型。在橡胶树冠层的光合作用模型和群体呼吸作用模型的基础上,整合成橡胶树干物质积累模拟模型。模型经初步检验,结果表明模拟值与观测值吻合度较好,模型不仅具有较强的机理性而且具有较高的预测性和实用性。
Crop growth model is the core of digital agriculture. The research of simulation models on rubber tree photosynthesis and dry matter accumulation would be the foundation for the research and application of digital rubber trees. By using object-oriented C ++ for the development language, and QT prospects for the development of graphical user interface platform, applying SQL Server 2005 for back-end database supported by the meteorological data in the database, and according to the idea of modular design, the rubber tree photosynthesis and dry matter accumulation simulation system for material accumulation was built. Based on single leaf light response model and the canopy light distribution, rubber tree canopy photosynthesis model was constructed by integral form. In this model, factors that would affect rubber canopy photosynthetic rate were considered. These factors included the light flux density, temperature, leaf area index, the largest single-leaf photosynthetic rate, photosynthetic characteristic parameters, extinction coefficient, and group reflectivity. Based on the relationship of the respiration rate of leaves and wood organ interact with the environmental factors, the rubber tree respiration model was developed. Based on the canopy photosynthesis model and the respiration model, the dry material accumulation simulation model of rubber tree was constructed. The validation of model for dry matter accumulation with field experiments indicated good fit between the simulated and observed data. Therefore, this model is strong on both mechanism and practicability.
出处
《中国农学通报》
CSCD
北大核心
2010年第6期317-323,共7页
Chinese Agricultural Science Bulletin
基金
科技支撑计划(2006BAD10A01-02)
海南省重点科技计划(070104)
海南省自然科学基金(0807045)
基本科研业务费(XJSYWFZX2008-23)资助
关键词
橡胶树
模拟模型
光合作用
干物质积累
rubber tree
simulation model
photosynthesis
dry matter accumulation