Led examples of plant growth lights
The soluble sugar content of ninth days was lower than that of fifteenth days, and the red light decreased much more than that under natural light, and the stem segments under red light were earlier than those under natural light. After 15 days, the soluble sugar content in red light was higher than that in natural light, which might be related to the higher chlorophyll content in red light (Table 2) and the stronger photosynthesis.
During the growth of stem segments, chlorophyll content decreased first and then increased, whether under natural or red light. But the chlorophyll content in red light was higher than that in natural light, indicating that red light played a significant role in promoting the formation of chlorophyll, and with the increase of the number of days, the result was more obvious (Table 2). Red light plant growth is good, may be due to the higher chlorophyll content in plants, photosynthesis is exuberant, synthesis of more carbohydrates, which provides sufficient material and energy caused by the growth of plants. Table 2 contents of chlorophyll and soluble sugar in natural light and red light
Taking chrysanthemum as the test material, 120 branches with uniform growth and strong chrysanthemum were selected and divided into 2 groups, each with 60 branches. Foliage clipping about 12cm long period, and will cut into the base of the wedge surface, the base part 10PPM has 12 hours naphthalene acid treatment, intelligent seedbed and red beds grow lights and then fill in natural light propagation, growth observation and record of stem segment. Determination of chlorophyll content in the extraction, the development of the first 3612 days, the same uniform leaves 0.2g, cut into pieces, with 1:1 acetone: ethanol, determination wavelength of 652nm OD value after 24 hours of extraction in 40 degree oven, calculate the content of chlorophyll. The soluble sugar was determined by 3,5 two nitro salicylic acid method, and the activity of nitrate reductase (NR) was determined by sulfanilamide colorimetry. The following results were obtained:1, after 30d culture, the stem segments of red light were earlier than the natural light, and the final roots were more, and the rooting rate was as high as 100%. The roots were strong and strong. Deep green leaves, sturdy stems, seedlings grow vigorously. In the whole culture process, the growth of red light material is obviously better than that under natural light, and red light has the effect of promoting small Huang Jusheng root (Table 1). Table 1 Comparison of rooting of one thousand small Huang Ju branches under red light and natural light
