Comparison of photosynthetically active radiation measurements

Comparison of photosynthetically active radiation measurements

Photosynthesis of plants is a complex photochemical reaction process. According to the laws of light's quantum, in the premise that photochemical reactions can be induced, the rate of photochemical reactions should be proportional to the number of photons absorbed per unit time, and each photon The energy has nothing to do. Therefore, in the measurement of photosynthetically active radiation, it is more reasonable to use photons as a unit of measure than to use energy units. The measurement of the light intensity can be measured using a photosynthetic active radiometer or a photosynthetic active radiation recorder.

The light intensity required for each plant is different. With the increase of light intensity, the photosynthesis of plants increases, but if the light intensity exceeds a certain value, photosynthesis will continue to decrease until only the respiration is performed. In those greenhouses, in order to increase the photosynthesis of plants, fluorescent lamps are often used instead of sunlight. How is the light intensity calculated?

In the past, people used energy probes to measure the light intensity. However, the result of this measurement is not a correct value but can also be used after conversion. This can cause errors in the conversion process. Now, the photosynthetic active radiometer and photosynthetic active radiation recorder produced by our company are a professional measurement of photosynthetically active radiation. When using it, the operation is simpler. At the same time, the measurement can be obtained by setting the time to set the measurement value differently. In addition, it has a calculation software that helps you to convert the data into a graph. The collected data is stored as an EXCEL spreadsheet file, which is convenient for users to save and process data, or use special software for data processing, drawing bar graphs, pie charts, and printing.

The measurement accuracy is high, the error is small, and the weight is relatively light. It is suitable for carrying out operations outdoors. It is a good instrument for measuring photosynthetically active radiation.