The three different types of UV radiation; A, B, and C, each have unique effects on plant morphology and health. In this video, Dr Bruce Bugbee explains the helpful and often harmful effects of UV on plants in nature, the greenhouse, and in controlled environment growth chambers. [ Ссылка ]
VIDEO CONTENT
00:14 Apogee makes a couple different sensors to measure UV light.
00:40 The electromagnetic spectrum and UV wavelengths – UV-A, UV-B, and UV-C.
02:47 How much of these wavelengths are in sunlight? And how do those photons cause sunburn?
04:44 The erythemal response curve: one photon in UV-B is equal to 100 photons of UV-A.
04:58 The glass in greenhouses filters out most UV-B and UV-C wavelengths.
05:41 How does the erythemal response curve look for plants?
06:27 Some beneficial effects of UV-A.
07:09 The effects of UV-C, UV-B, and UV-A from Bruce’s research. It all depends on “dose.”
07:47 A good rule of thumb is some UV is good for people – it’s just the right amount. And some UV is good for plants – it’s just the right amount.
08:48 A more in-depth look at the sensors Apogee makes to measure UV light: UV-A (SU-200), spectroradiometer, and ePAR.
10:20 With the correct dose of UV light, there is strong potential to improve plant quality.
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