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首页> 外文会议>2016 IEEE International Conference on Functional-Structural Plant Growth Modeling, Simulation, Visualization and Applications >Analyzing the canopy light distribution among different poplar genotypes using terrestrial laser scanner and the GreenLab model
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Analyzing the canopy light distribution among different poplar genotypes using terrestrial laser scanner and the GreenLab model

机译：使用地面激光扫描仪和GreenLab模型分析不同基因型的杨树之间的冠层光分布

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Crown architecture determines the leaf distribution, light interception and biomass production of trees in a high-density plantation. Light distribution and interception affect leaf photosynthesis and biomass production. The precise analysis of the light distribution in crown architecture is meaningful for ideotype breeding and genotype selection in forests. In the present study, five genotypes (namely, 6, 14, 97, 111 and 171) with significantly different crown architectures and biomass production were selected and analyzed using a terrestrial laser scanner (TLS). The branch characteristics that determine the crown structure were extracted from TLS point clouds. Geomagic Studio (2012, 3D system, USA) and Geomagic Spark (3D system, USA) software were used to measure these branch traits. Light response curves of leaves in the upper, middle and lower crown layers was measured using a portable photosynthesis system (LI-6400 XT, OPEN 6.1, Ecoteck, USA) and were used for deriving the leaf response to the photosynthetic photon flux density (PPFD). Using the GreenLab model, the visualized crown of each genotype was simulated according to the measured parameters of the branch traits, which were used to simulate and analyze the distribution of leaf irradiance and leaf photosynthesis in canopy. According to The results, genotype 171 showed the highest light interception and biomass production among the five monitored genotypes, which is consistent with the results obtained in the field observations. Thus, we concluded that genotype 171 is the ideal genotype and could be used for energy and wood fiber production and cultivation in high-density plantations.
机译：冠状建筑决定了高密度人工林中树木的叶片分布，光的拦截和生物量的产生。光的分布和拦截影响叶片的光合作用和生物量的产生。对树冠结构中光分布的精确分析对于森林的表型育种和基因型选择具有重要意义。在本研究中，使用陆地激光扫描仪（TLS）选择并分析了冠结构和生物量产生显着不同的5个基因型（即6、14、97、111和171）。确定树冠结构的分支特征是从TLS点云中提取的。使用Geomagic Studio（2012，美国3D系统）和Geomagic Spark（美国3D系统）软件来测量这些分支特征。使用便携式光合作用系统（LI-6400 XT，OPEN 6.1，Ecoteck，美国）测量上，中冠和下冠层叶片的光响应曲线，并用于推导叶片对光合作用光子通量密度（PPFD）的响应）。使用GreenLab模型，根据测得的枝条性状参数模拟了每种基因型的可视化冠，用于模拟和分析冠层中叶片辐照度和叶片光合作用的分布。根据结果​​，基因型171在五个被监测的基因型中显示出最高的光拦截和生物量产生，这与现场观察获得的结果一致。因此，我们得出结论，基因型171是理想的基因型，可以用于高密度人工林中的能源和木纤维生产和种植。

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