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Estimation of Whole Plant Photosynthetic Rate of Irwin Mango under Artificial and Natural Lights Using a Three-Dimensional Plant Model and Ray-Tracing
- Source :
- International Journal of Molecular Sciences; Volume 19; Issue 1; Pages: 152, International Journal of Molecular Sciences
- Publication Year :
- 2018
- Publisher :
- MDPI AG, 2018.
-
Abstract
- Photosynthesis is an important physiological response for determination of CO2 fertilization in greenhouses and estimation of crop growth. In order to estimate the whole plant photosynthetic rate, it is necessary to investigate how light interception by crops changes with environmental and morphological factors. The objectives of this study were to analyze plant light interception using a three-dimensional (3D) plant model and ray-tracing, determine the spatial distribution of the photosynthetic rate, and estimate the whole plant photosynthetic rate of Irwin mango (Mangifera indica L. cv. Irwin) grown in greenhouses. In the case of mangoes, it is difficult to measure actual light interception at the canopy level due to their vase shape. A two-year-old Irwin mango tree was used to measure the whole plant photosynthetic rate. Light interception and whole plant photosynthetic rate were measured under artificial and natural light conditions using a closed chamber (1 × 1 × 2 m). A 3D plant model was constructed and ray-tracing simulation was conducted for calculating the photosynthetic rate with a two-variable leaf photosynthetic rate model of the plant. Under artificial light, the estimated photosynthetic rate increased from 2.0 to 2.9 μmolCO2·m−2·s−1 with increasing CO2 concentration. On the other hand, under natural light, the photosynthetic rate increased from 0.2 μmolCO2·m−2·s−1 at 06:00 to a maximum of 7.3 μmolCO2·m−2·s−1 at 09:00, then gradually decreased to −1.0 μmolCO2·m−2·s−1 at 18:00. In validation, simulation results showed good agreement with measured results with R2 = 0.79 and RMSE = 0.263. The results suggest that this method could accurately estimate the whole plant photosynthetic rate and be useful for pruning and adequate CO2 fertilization.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Canopy
Light
Greenhouse
Photosynthesis
Spatial distribution
Models, Biological
01 natural sciences
Article
light interception
Catalysis
Inorganic Chemistry
03 medical and health sciences
chemistry.chemical_compound
photosynthetic rate model
CO2 consumption
Computer Simulation
Mangifera
Physical and Theoretical Chemistry
Irwin mango
three-dimensional plant model
Molecular Biology
Spectroscopy
Organic Chemistry
Reproducibility of Results
General Medicine
Carbon Dioxide
Computer Science Applications
Plant Leaves
Horticulture
030104 developmental biology
chemistry
Carbon dioxide
Environmental science
Interception
Pruning
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14220067
- Volume :
- 19
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences
- Accession number :
- edsair.doi.dedup.....f34bc12687247a60b183fc0e1a769dc3
- Full Text :
- https://doi.org/10.3390/ijms19010152