2010年9月15日 星期三

Affect Plants

How Light-Emitting Diodes Affect Plants?

Light-emitting diodes are becoming a popular light source, which people use for artificial illumination of plants. Scientists claim that LEDs induced serious changes in plants? organisms and affected their growth and productivity.

The experiment consisted of growing Chinese cabbage under various light sources: arc sodium lamp and a bunch of red and blue LEDs in 7:1 ratio. Maximum of red LED抯 emission spectrum is 650 nanometers, and blue LED has emission maximum at 470 nm. These light sources worked with low and normal intensity.

When LED抯 light intensity was normal, which means fluence rate of photosynthetically active photons was about 400 micromole (per square meter per second), light抯 spectral composition affected leaf area. Leaves, illuminated with LEDs,High quality energy saving light, welcome to buy. were two times smaller than those,,Welcome to order Insulator,Porcelain insulator,Lamp holder,Springs from us. illuminated with sodium lamp. However, LEDs didn抰 affect the number of chloroplasts,intended to simplify the integration process for users who do not want to design and manufacture metthermal solution for the LEDs. leaf抯 thickness and cell size.

Illumination with sodium lamp under low light intensity almost stopped photosynthesis (no starch granules formed), however, LED light even increased amount of starch granules, compared to that under high intensity.Our knowledge of products covers auto/led downlight.

All this means that reduced spectrum of LEDs, consisting only of red and blue bands, can seriously alter plant organisms via affecting adaptation mechanisms and chloroplasts. Further optimization of LED light can result in challenging Mother Nature.

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