3D plant model assessed by terrestrial LiDAR and hemispherical photographs: A useful tool for comparing light interception among oil palm progenies
3D plant model assessed by terrestrial LiDAR and hemispherical photographs: A useful tool for comparing light interception among oil palm progenies
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DOI：
10.1016/j.agrformet.2017.11.008
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发表时间：
2018-02-15
影响因子：
6.2
通讯作者：
Dauzat, Jean
中科院分区：
文献类型：
--
作者：
Perez, Raphael P. A.;Costes, Evelyne;Dauzat, Jean
功能结构模型（FSPM）的范式假设研究植物结构的详细组织可以更好地理解功能过程，特别是植物捕获光进行光合作用的方式。然而，必须注意虚拟植物和田间植物在大小和几何形状方面的一致性，以准确地评估光截获。因此，本文旨在i）评估基于油棕（油棕）的3D结构模型在个体植物和栽培地块的尺度上准确地表示植物结构特征的能力，以及ii）采用经验证的3D模型来调查光拦截效率在表现出不同结构的后代之间如何变化。与植物几何形状和拓扑结构相关的创新指标来自地面激光雷达扫描仪（TLS）和半球照片（HP），以评估3D植物模型。指标，如植物的高度，宽度和体积，间隙分数和立体角预测建立从实地测量，并进行了比较，等同的指标，已提取虚拟TLS（VTLS）和虚拟HP（VHP）模拟3D模型。然后评价指标在光截获方面的重要性。结果表明，VTLS和VHP估算的结构指标与TLS和HP估算的等效指标以及与光截获相关的模拟产量均呈显著正相关。光截获效率估计从验证的3D模型在研究中的五个后代之间的显着差异，最显着的沿着植物development.Our研究结果突出相结合的TLS和HP衍生的指标，以评估虚拟的3D重建的植物光捕获的可靠性的相关性，在植物和地块尺度。这项研究为进一步研究铺平了道路，旨在揭示油棕结构与驱动其生产的生理过程之间的关系。
The paradigm of functional-structural models (FSPM) assumes that studying the detailed organisation of plant structure allows a better understanding of functional processes; in particular the way plants capture light for performing photosynthesis. However, much attention must be paid toward the consistency between virtual plants and plants in the field in terms of size and geometry to accurately evaluate light interception. This paper thus aimed at i) assessing the capacity of a 3D architectural model based on oil palms (Elaeis guineensis) to accurately represent plants structural characteristics at both the scale of the individual plant and the cultivated plot and ii) employing the validated 3D mock-ups to investigate how light interception efficiency varies among progenies that exhibit different architectures. Innovative indicators related to plant geometry and topology were derived from terrestrial LiDAR scanners (TLS) and hemispherical photographs (HP) in order to assess a 3D plant model. Indicators such as plant height, width and volume, gap fractions and solid angle projections were established from field measurements and were compared to equivalent indicators that had been extracted from virtual TLS (VTLS) and virtual HP (VHP) simulated on 3D mock-ups. Indicators were then evaluated for their significance in terms of light interception. Progeny effect on light interception efficiency was finally evaluated for five progenies.The structural indicators estimated from VTLS and VHP were significantly correlated with equivalent indicators estimated from TLS and HP, respectively, and with simulated outputs related to light interception. Light interception efficiencies estimated from validated 3D mock-ups differed significantly among the five progenies under study, most notably along plant development.Our results highlight the relevance of combining TLS- and HP-derived indicators to evaluate the reliability of virtual 3D reconstruction of plants in relation to light capture, at both the plant and plot scales. The study paves the way for further investigations aiming at unravelling the relationships between oil palm architecture and the physiological processes driving its production.