Job offersmore »
- Department Chair and Professor of Human Ecology - Davis (CA) USA
- Factory Manager Assistant - Huizhou, China
- Internal Salesperson - Netherlands
- Crop Manager - Northern France
- Farm General Manager - Egypt
- Grower (cucumbers) - Australia
- Projectleider Export - Maasdijk, Nederland
- Sales representative - Eastern PA, DE, MD, VA & WV, USA
- Sales representative - Michigan, USA
- Assistant Grower - Delta (BC), Canada
Top 5 - yesterday
- No news has been published yesterday.
Top 5 - last week
Top 5 - last month
- "Easier to clean and lasting longer than polystyrene"
- Klasmann-Deilmann takes over international distribution of Growcoon
- US: Patent for cooling method of electrical components in a geothermal well
- Soil to hydroponics: 50%-100%+ increase in tomato and pepper production
- Pythium root rot on hydroponically grown basil and spinach
Exchange ratesmore »
Combining downward and upward lighting improves plant growth“Plant factory with artificial lighting” (PFAL) refers to a plant production facility that can achieve mass production of vegetables year round in a controlled environment. However, the high-density planting pattern in PFALs causes low light conditions in the lower canopy, leading to leaf senescence in the outer leaves and thus to reductions in plant yields.
In a new study, the effect of supplemental upward lighting underneath the plants on photosynthetic characteristics and plant yield was examined in lettuce, in comparison with supplemental downward lighting from above the plants at the same light intensity.
Supplemental upward lighting increased the curvature factor of the photosynthetic response to light from above the plants. Moreover, supplemental upward lighting significantly enhanced the lettuce yield by retarding the senescence of the outer leaves.
The researchers propose a novel cultivation system with a combination of downward lighting and supplemental upward lighting that can effectively increase plant growth and yield in PFALs.
Access the full study at HortScience.
Publication date: 8/10/2017
Other news in this sector: