2021-05-10
The growth and development of plants are significantly affected by the
light quality and its different composition ratios. The light formula mainly
includes several factors such as light quality ratio, light intensity, and
light time. Since different plants have different requirements for light and
different growth and development stages, it is necessary to carry out the best
combination of light quality, light intensity, and light supplement time for
the cultivated crops. Light quality ratio Compared with white light and single
red and blue light, the combination of LED red and blue light shows
comprehensive advantages for the growth and development of cucumber and cabbage
seedlings. When the ratio of red and blue light is 8:2, the plant stem
thickness, plant height, plant dry weight, fresh weight, strong seedling index,
etc. are significantly increased, and it is also conducive to the formation of
chloroplast matrix and basal lamella and the output of assimilation products.
When the ratio of red and blue light is 8:1, cucumber seedlings have the
highest plant height, stem thickness, leaf area, strong seedling index, aboveground
and whole plant fresh quality, and the seedling leaves have higher POD and APX
activities; Under the treatment with a blue light ratio of 6:3, the root
vitality, leaf soluble protein, soluble sugar content and net photosynthetic
rate of cucumber seedlings were the highest, and the SOD activity was
relatively high.
Using a combination of red, green, and blue qua