基于蔗糖产量时域变化的温室番茄光合作用的模拟与验证  

Simulation and validation of photosynthesis of greenhouse tomato based on temporal variation of sucrose yield

作　　者：倪纪恒[1] 王媛媛[1] 刘勇[1] 毛罕平[1] Ni Jiheng;Wang Yuanyuan;Liu Yong;Mao Hanping(School of Agricultural Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学农业工程学院,镇江212013

出　　处：《农业工程学报》2021年第8期223-228,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：江苏省重点研发计划项目(BE2018035);江苏省高校优势学科建设工程资助项目(苏财教(2014)37号);江苏大学高级人才启动基金(13JDG31)。

摘　　要：为了使基于过程的作物模型(Based on Process Model,BPM)和基于结构的作物模型(Structure Model,SM)更好的衔接。该研究依据温室番茄的生理特性,分析了单位叶面积蔗糖产量与光合有效辐射的关系,建立了单位叶面积蔗糖产量子模型;利用有效叶面积与有效积温的关系公式,建立了有效叶面积的预测模型。将二者整合,构建了基于蔗糖的温室番茄光合作用模型并采用独立的试验数据对模型进行了验证。结果表明,单位叶面积蔗糖产量的预测结果的决定系数R~2和RMSE分别为0.98和0.95 g/m^(2);有效叶面积的预测结果的R~2和RMSE为0.96和0.02 m^(2);单株蔗糖产量的预测结果的R2和RMSE为0.97和48.58 mg/株。该文提出的有效叶面积初步解决了番茄因不断摘除老叶导致叶面积发展规律不断被打破导致无法准确模拟的问题,所建立的光合作用模型初步实现了基于过程的作物生长模型和基于结构的生长模型的有效融合。Functional-structural model has been a new versatile tool in crop science in recent years,integrating by based on process model(BPM)and structural model(SM).However,the output of PBM and SM have not been well connected with each other,particularly when referred to dry matter and sucrose.Therefore,this work was dedicated to developing a novel functional-structural plant model for the photosynthesis of greenhouse tomato using sucrose.The experiments(marked as E1 and E2)were carried out at a venlo-type greenhouse in Jiangsu University of China from February 2017 to January 2018.The data from E1 was used to establish a photosynthesis model,and the data from E2 was applied to validate the model.In the experimental procedure,the tomato seedling with four leaves during the period of growth was transplanted into a cultivation barrel filled with perlites.Tomato seedling was watered by Hogland nutrient solution,350ml twice a day.The temperature and humidity were controlled in the whole growth period at 15-32℃and 60%-85%,respectively.The tomato plant was destructive sampling at 8:00,10:00,12:00,14:00,and 16:00 at a sunny day under seedling,flowering,and harvest stage.After that,a high-performance liquid chromatography was utilized to determine the sucrose content of every leaf petiole after the fresh weight was measured.Interception of photosynthetically active radiation(PAR)was recorded using the 1:1 relative to greenness and normalized difference,where single leaf area was equal to the product of leaf length and width.Three submodels were included for the photosynthesis of single leaf,prediction of active leaf area(ALA),and total photosynthesis.Firstly,a mathematical submodel of sucrose production per unit leaf area was established using E1 data and PAR.Secondly,the concept of ALA was introduced to overcome the influence of leaving leaf on tomato leaf area,where the leaf area for photosynthetic effective radiation of tomato leaf interception was equivalent to that of top leaf interception.The single ALA was calculated b

关 键 词：温室 模型 蔗糖 有效叶面积 光合作用模型 番茄 

分 类 号：S625.5[农业科学—园艺学]