Artificial light source schemes for planting several common crops - including leafy vegetables, tomatoes, medicinal plants, etc
The light required by plants in different growth periods is different, including tissue culture, seedlings, vegetative growth, flowering and reproductive stage, fruit harvest stage, etc. the following is the light requirements of most planting crops. You can refer to the article: "light compensation point and light saturation point of 30 plants such as cucumber, tomato, radish, lettuce, strawberry, Dendrobium candidum and Anoectochilus"
Let's talk about the conclusion first. For plant planting in a small area of 2x2m, large-size plant lamps (at present, there are 1.2x1.2m large-size plant lamps in the market, such as rx-g80, rx-g120e, etc.) are preferred within the planting area. Close irradiation has small light loss and high light uniformity.
Use only one lamp rx-g80 or rx-g120e:
Leafy vegetable planting: the maximum coverage area is 2x2m and the hanging height is 1.2m
Tomato or medicinal plant planting: plant tent 2x2m, hanging height 0.71M; The darkroom has no reflection, 1.5x1.5m, and the suspension height is 0.71M
Professional high-speed growth, adding carbon dioxide, planting tomatoes and medicinal plants: plant tent 1.5x1.5m, 0.51M; The darkroom has no reflection, 1.2x1.2m, and the suspension height is 0.46M
Lighting requirements for different plants and different growth stages, simplified version:
1. Tissue culture
The illumination required for tissue culture is about 40-60 µ mol / m ² s ¹， Most of the light needed for plant tissue culture is in between
2. Seedling (light at seedling stage of most crops)
The light at seedling stage is usually 150-250 µ mol / m ² s ¹， Different crops will vary
3. Vegetative growth period
During the vegetative growth period of leafy vegetables, the light is 250-350umol / m ² s ¹， The average light of most leafy vegetables is 250umol / m ² s ¹ It can meet the light requirements, but some leafy vegetables, such as large fast-growing lettuce, can be given higher light to meet the needs of rapid growth
4. Reproductive growth stage, i.e. flowering and fruiting stage. In this period, giving relatively high light will improve the harvest. By increasing far red light and UV light, the flowering amount and the content of taste or active substances will be increased. Under the condition of 400ppm without adding carbon dioxide content, the light will be 350-600umol / M ² s ¹， If the carbon dioxide content can be increased to 1200ppm, the illumination can be increased to 600-1200umol / m ² s ¹， It can significantly improve the yield of specific varieties, such as tomatoes, high light medicinal plants, etc
Based on the above requirements of plant illuminance, we usually need to test plant lamps. In the above range, the light intensity PPFD, the irradiation height and irradiation range of plant lamps. Below, g80 dual channel plant lamps are used to illustrate different scenarios and more reasonable application methods:
Use scenario of single 1.2x1.2m lamp
Since g80 dual channel plant lamp is a dual channel high-power plant lamp with a total power of 630W, it is not suitable for tissue culture growth period. Tissue culture is omitted here.
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