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| Content Provider | frontiers |
|---|---|
| Author | Tang, Liyu Yin, Dan Chen, Chongcheng Yu, Dayu Han, Wei |
| Abstract | Canopy architecture determines the light distribution and light interception in the canopy. Reasonable shaping and pruning can optimize tree structure; maximize the utilization of land, space and light energy; and lay the foundation for achieving early fruiting, high yield, health and longevity. Due to the complexity of loquat canopy architecture and the multi-year period of tree growth, the variables needed for experiments in canopy type training are hardly accessible through field measurements. In this paper, we concentrated on exploring the relationship between branching angle and light interception using a three-dimensional (3D) canopy model in loquat (Eriobotrya japonica Lindl). First, detailed 3D models of loquat trees were built by integrating branch and organ models. Second, the morphological models of different loquat trees were constructed by interactive editing. Third, the 3D individual-tree modeling software LSTree integrated with the OpenGL shadow technique, a radiosity model and a modified rectangular hyperbola model was used to calculate the silhouette to total area ratio, the distribution of photosynthetically active radiation within canopies and the net photosynthetic rate, respectively. Finally, the influence of loquat tree organ organization on the light interception of the trees was analyzed with different parameters. If the single branch angle between the level 2 scaffold branch and trunk is approximately 15° and the angles among the level 2 scaffold branches range from 60° to 90°, then a better light distribution can be obtained. The results showed that the branching angle has a significant impact on light interception, which is useful for grower manipulation of trees, e.g., shoot bending (scaffold branch angle). Based on this conclusion, a reasonable tree structure was selected for intercepting light. This quantitative simulation and analytical method provides a new digital and visual method that can aid in the design of tree architecture. |
| ISSN | 1664462X |
| DOI | 10.3389/fpls.2019.00364 |
| Volume Number | 10 |
| Journal | Frontiers in Plant Science |
| Language | English |
| Publisher Date | 2019-03-26 |
| Access Restriction | Open |
| Subject Keyword | Light interception Canopy architecture Light distribution Silhouette to total area ratio (STAR) Interactive shaping and pruning Net photosynthetic rate |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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