摘要光合作用被称为是“地球上最重要的化学反应”。建立合理的光合作用模型可以模拟数量繁多的试验，解决普通的计算和试验无法解决的问题。在温室设施条件下，作物光合作用的模拟模型为加强作物自动化生产管理和提高作物的产量提供坚实的理论基础。影响光合速率的环境因子主要有光照、CO2浓度、温度、水分和矿物质元素等。86067
本文研究五种光合作用模型，模拟净光合速率在光合辐射、CO2浓度和温度条件变化时的变化情况。通过试验测定的环境数据对它们进行验证和误差分析得到以下结论：（1）较低单一变量时，净光合速率随着变量的增大而提高；较高温度条件下（大于最适温度），净光合速率受高温限制，随着温度的升高而减小；在较高的CO2浓度和光合辐射时，净光合速率缓慢增长，甚至不再变化，此时的净光合速率最大。（2）多个变量时，最大净光合速率值出现的条件为：温度在最适温度左右，光合辐射和CO2浓度达到基本饱和状态。（3）以直角双曲线作为基准，对其它模型误差分析；非直角双曲线的误差相对较大，达到1。5468；负指数模型的误差相对较小，为0。1831。总的来说这五种模型的模拟基本良好。
毕业论文关键词：温室；光合速率；模型；环境因子
Abstract Photosynthesis is known as the "most important chemical reactions on Earth"。 To establish a rational photosynthesis model, we can simulate large amounts of tests in order to solve common calculation and solve the problems。 The crop photosynthesis models in the greenhouse provide a theoretical basis for enhancing crop auto production management and improving crop yields。 Environmental factors that affect the photosynthetic rate are light, CO2 concentration, temperature, moisture and minerals elements。
Five photosynthesis models are investigated in this article。 They are simulated to discuss the changes of photosynthetic rate with the changes of PAR, CO2 concentration and temperature。 Here comes a conclusion by testing them and the error analysis with the measured environmental data: (1) The net photosynthetic rate increases with the increase of the change with low single variable; The net photosynthetic rate is limited by the high temperature, and decreases with the increasing temperature at higher temperatures (higher than the optimum temperature); Net photosynthetic rate grows slowly at higher CO2 concentrations and photosynthetic radiation, even no changes。 It reaches the maximum net photosynthetic rate in this situation。 (2) With a number of alternating quantities, the maximum net photosynthetic rate value appears when the temperature is optimum, the photosynthetic radiation and CO2 concentration reaches saturation。 (3) Using rectangular hyperbola as a benchmark to analysis the errors of other models; Non-rectangular hyperbolic error is relatively large and it reaches 1。5468; the negative exponential model error is relatively few, reaching 0。1831。 In all, the simulations of five models are fine。
Keywords: greenhouse; photosynthetic rate; model; environmental factors
主要符号说明
净光合速率， 组织干重，
总光合速率， 消光系数
最大光合速率， 叶子面积系数，
叶片光合量子效率 植物总干重中根干重所占比例
羧化速率 二氧化碳补偿点，
温室的环境温度， 叶子二氧化碳的扩散导度，
最高温度， 光的利用效率，
最低温度， MATLAB温室作物光合作用建模与试验:http://www.youerw.com/zidonghua/lunwen_101921.html