Application of Photosynthetic Apparatus in Measuring Indoor Plant Photosynthesis

I believe that many people have the hobby of placing green plants at home or in the office. Green plants can absorb CO ₂ and formaldehyde, purify the environment, and release high-purity quality O ₂ – businesses and sellers spare no effort to promote this.

Yes, in the natural environment, plants do, photosynthetically absorb CO ₂ and water, synthesize sugars and release O ₂ , as shown in the figure below.

The premise is that there must be enough light!

However, in the indoor light environment, is the plant still the same?

Ekotech's EcoLab laboratory used the LCpro SD photosynthetic apparatus produced by British ADC to measure the indoor green plants of the genus Amaranthus, which have good indoor growth. The results are as follows:

The 10:03:08 measurement uses the RGB artificial light source that comes with the system. The light intensity is set to 173 μmol m ^-2 s ^-1 , so the plants have weak photosynthesis at a rate of 3.44 μmol m ^-2 s ^{- 1} ; After the time, the artificial light source is removed under the general illumination in the room. At this time, the light intensity is about 2 or 3 μmol m ^-2 s ^-1 , and the photosynthetic rate A value can be clearly seen as basically 0 or negative. Value, plants basically do not carry out photosynthesis, the opposite plants are mainly engaged in respiration, intake of O ₂ !

From this we can conclude that indoor green plants that are far away from the window or that do not have sufficient light can not provide O ₂ as expected because they cannot guarantee the normal operation of photosynthesis. On the contrary, they consume some oxygen.

According to the researchers, an adult needs 550 L/day of oxygen, which is about 11,000 L/day when it is air, and 32 g of O ₂ when plant growth gains 15 g. The volume is about 22 at normal temperature and pressure. L, which means that when the plant gains 3.75 kg per day, it can provide 550 L of oxygen for an adult's daily needs, and 3.75 kg is equivalent to the weight of half a large watermelon.

So, we like green plants because they keep us happy in life and work, not oxygen.

Finally, we are honored to recommend to the users the photosynthetic apparatus L Cpro T and L C i T produced by A DC . The characteristics are as follows:

• Color touch screen, advanced visual graphic interface, 360° full viewing angle to meet the needs of users in the field
• Built-in GPS global positioning system to automatically record the position information of each field measurement
• Intelligent RGB three-color or white LED control light source, can customize different light quality (band) light response curve
• Highly integrated, highly stable and highly portable, the LCi T handheld measuring unit weighs only 0.6kg, the control unit (also known as the “host”) 2.4kg, and the LCpro T control unit weight is further reduced to 4.1kg.
• Intuitive, user-friendly, fully automated photosynthesis measurement and soil respiration measurement, excellent software design makes operation easier
• New lithium-ion battery life up to 16 hours
• Complete leaf chamber climate control
• Diversified measurement room for a variety of leaf, fruit, soil respiration, community photosynthetic-respiratory measurement functions
• The analyzer is closely integrated with the measuring chamber to form a lightweight measuring unit, which responds quickly (instant response), rather than being installed in a host away from the chamber by piping, thus effectively avoiding slow response, stagnation and moisture in the measurement and environmental control. Pipeline condensation and other issues
• Powerful system expansion function, which can seamlessly measure photosynthesis and chlorophyll fluorescence parameters with chlorophyll fluorescence instrument and FluorCam chlorophyll fluorescence imaging.