LED Solar Lights
Aglare Lighting about the basic parameters of plant supplementary light
- date： 2021-12-01
- category： Industry knowledge
- click：
Daily photosynthetic amount DLA
Daily light amount (DLA): the number of moles of photons per square meter of PPFD produced by artificial light sources per day under photoperiod, unit: mol/m2d.
Since the light amount of plant light is constant under photoperiod, DLA=0.0036*PPFD*PP. PP-photoperiod unit: hour.
DLA is the planting process parameter. The PPFD required for planting plants in a plant factory is calculated using DLA.
Disclaimer: DLA parameters are defined by Xu Dong of Good Light Solid State Light Source Research Institute, references need to be noted.
Daylight Integral Volume DLI
Daily light integral (DLI): The amount of photosynthesis integral per square meter per day under effective solar radiation, unit: mol/m2d.
DLI is an important photosynthetic parameter in traditional planting, and is a technical parameter of long-term agricultural scientific research with universal planting guidance. Under sunlight, since the photosynthetic irradiance of sunlight (converted into PPFD) is constantly changing with time and weather, this change will appear across sometimes between the compensation point and the saturation point, therefore, DLI needs to be calculated according to the integral method, and the preliminary The calculation can be done using the average PPFD with the effective time (hours).
DLI calculated by the mean method in sunlight, DLI = 0.0036 * PPFD (mean) * effective time. Effective time unit: hours.
In outdoor planting, the DLI parameter will be affected by the saturation point. In greenhouse greenhouses, the DLI of indoor is smaller than the DLI of outdoor, and the DLI of greenhouse is usually smaller than the DLA. The creation of the DLA parameter scientifically provides the theoretical basis of whether the greenhouse is supplemented with the amount of supplemented light, and the systematic establishment of the DLA database of artificial light source can provide the basic data system of plant plant factory application, which has It is hoped that agricultural researchers will participate in this work.
DLA is the main parameter of planting process of plant factory and greenhouse supplemental light, and is the main basis of plant light design. DLA can be initially derived from experimental data or through DLI after weighting, but it needs to be corrected by experimental data, and the relationship between DLA and DLI is: DLA
The above is the introduction of plant light spectrum parameters, understand clearly these parameters of plant light, for the application and communication of plant light is very important, standardized use of these parameters, can correctly apply plant light and research plant light spectrum.