WO2023280325A1

WO2023280325A1 - Light environment for indoor purple and red lettuce production

Info

Publication number: WO2023280325A1
Application number: PCT/CN2022/105460
Authority: WO
Inventors: 李阳; 陈艺群; 吕小玉
Original assignee: 福建省中科生物股份有限公司
Priority date: 2021-07-09
Filing date: 2022-07-13
Publication date: 2023-01-12
Also published as: CN113498689B; CN113498689A

Abstract

Disclosed in the present invention is a light environment for indoor violet and red lettuce production. A wavelength range of the light environment is 380-780 nm. Photons having a wavelength in a range of 500-599 nm account for 0% of the total photons having a wavelength in a range of 380-780 nm, a ratio between photons having a wavelength in a range of 700-780 nm and photons having a wavelength in a range of 600-699 nm to photons having a wavelength in a range of 400-499 nm is 1.0-1.4:1, and photons having a wavelength in a range of 700-780 nm account for 12-17% of the total amount of photons having a wavelength in the range of 380-780 nm. Using the light environment of the present invention for indoor cultivation of lettuce not only can ensure the production of bright-colored purple and red vegetables, but also can avoid the problem of yield reduction caused by coloring. In addition, the present light environment is fully in the visible light range, harmless to the human body, has a low manufacturing cost, and can be widely promoted.

Description

A light environment for indoor purple and red lettuce production

technical field

The invention relates to the technical field of vegetable indoor cultivation, in particular to a light environment for indoor purple and red lettuce production.

Background technique

In recent years, with the rapid development of the field of plant lighting, there are many LED plant growth lights for indoor or greenhouse planting on the market. However, when planting purple and red vegetables indoors or in greenhouses with weak light, use normal LED plant growth lights are used as the source of light source. Purple and red vegetables can reflect the characteristics of purple and red vegetables at the seedling stage when the plants are relatively small and the leaves are relatively tender. The individual plants are larger or the leaves are longer and thicker. When they grow into adult leaves, the color of the leaves gradually fades from purple and red at the seedling stage to green, and the purple and red vegetables basically lose their original characteristics. The color of purple and red planted under natural sunlight is more purplish red, and the use of LEDs for vegetable cultivation indoors requires consideration of energy consumption. When planting purple and red vegetables, the degree of purple and red coloring is far lower than that of planting under natural sunlight, which cannot meet the market's coloring demand for purple-red vegetables.

The coloring depth of purple and red lettuce is mainly determined by the anthocyanin content in the plant. The main factors affecting the accumulation of plant anthocyanin content are as follows: anthocyanin structure, nitrogen source, potassium fertilizer, pH, temperature, light, carbon source, internal and external factors, and cultivation techniques. Up to now, some related research scholars have also conducted research on the coloring of purple-red vegetables by light environment. Fan Yinglun and others have shown that increasing UV-A and red light can increase the content of anthocyanins in potatoes. Research by Wang Zhidong and others showed that the use of short-wave ultraviolet UV-C treatment can increase the content of anthocyanins in fresh-cut purple cabbage. Qi Yan et al. showed that both UV-A and UV-B treatments could increase the anthocyanin content of cabbage seedlings. The above research scholars have shown that the use of ultraviolet light band irradiation treatment will be beneficial to the accumulation of vegetable anthocyanin content, but in the specific practical application of plant factories, it may be due to the high manufacturing cost of ultraviolet light band lamps, and the ultraviolet light There are adverse radiation effects on plant factory operators, so there are obstacles in the use of ultraviolet light bands in the large-scale promotion and application of plant factories. Therefore, it is urgently needed at present, so there is an urgent need for a light environment regulation technology that can promote the coloring of indoor purple and red vegetables, so that it can be applied to vegetable cultivation in plant factories on a large scale.

Purple and red lettuce are one of the salad vegetable varieties favored by consumers more and more. At present, when purple and red lettuce are cultivated in plant factories, it is often difficult for the purple and red lettuce produced to show the purple and red lettuce itself. The original variety characteristics, while the yield is greatly reduced. Therefore urgently need to take some measures to solve the problem of poor coloring and low yield of purple and red lettuce cultivated in plant factories.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a light environment for indoor production of purple and red lettuce, which can be used to produce brightly colored purple and red lettuce indoors while avoiding production reduction The problem.

The concrete technical scheme that the present invention takes is:

A light environment for indoor production of purple and red lettuce, the wavelength range of the light environment is 380-780nm, wherein the number of light quanta with a wavelength in the range of 500-599nm accounts for 0% of the total number of light quanta in the range of 380-780nm , the ratio of the sum of the number of photons with a wavelength in the range of 700-780nm to the number of photons with a wavelength in the range of 600-699nm to the number of photons with a wavelength in the range of 400-499nm is 1.0-1.4:1, and the wavelength is in the range of 700-780nm The number of photons in the range accounts for 12-17% of the total number of photons in the range of 380-780nm.

Further, the number of photons with wavelengths in the range of 400-499nm accounts for 41-50% of the total number of photons in the range of 380-780nm.

Further, the number of photons with wavelengths in the range of 600-699nm accounts for 33-46% of the total number of photons in the range of 380-780nm.

Preferably, in the light environment, the light intensity is set to 200-400 μmol/㎡·s, and the photoperiod is 10-15 h/d.

Further, adopt above-mentioned light environment during colonization of purple and red lettuce

The beneficial effects of the present invention are: the indoor cultivation of lettuce by using the light environment of the present invention can not only ensure the production of purple and red vegetables with bright colors, but also avoid the problem of yield reduction caused by coloring. Moreover, the light environment is within the range of visible light, is harmless to human body, has low manufacturing cost, and can be widely popularized.

Description of drawings

Fig. 1 is a schematic diagram of the light wave peak value of the LED lamp 7;

FIG. 2 is a schematic diagram of the peak light wave of the LED lamp 9;

FIG. 3 is a schematic diagram of the peak light wave of the LED lamp 10;

FIG. 4 is a schematic diagram of light peaks of the LED lamp 12 .

detailed description

The present invention will be further described in detail below in conjunction with the examples, but the embodiments of the present invention are not limited thereto, without departing from the above-mentioned technical thought of the present invention, various replacements and changes can be made according to common technical knowledge and conventional means in the art , should be included within the scope of the present invention.

The embodiment of the present invention provides a method for indoor cultivation of purple and red lettuce. For purple and red lettuce seedling cultivation in the early stage, the seeds are first soaked in clear water, and then sowed into sponge squares, one seed per hole, and placed in a germination box for Accelerate germination, and after the seeds are white, carry out seedling raising treatment. During the treatment, the EC value of the nutrient solution is 0.8-1.2mS/cm, and the pH is 6.0-7.0. When the lettuce grows to 4-5 true leaves, it is cultivated and planted, moved to the planting board, the planting row spacing is 15cm×20cm, and put into the nutrient solution tank for cultivation. The nutrient solution adopts the nutrient liquid film cultivation technology, and the whole During the planting period, the EC value of the nutrient solution was controlled at 1.2-2.0. With the extension of the vegetable growth period, the EC gradually increased, and the pH was 6.0-7.0. The temperature of the nutrient solution is 20-22°C, the dissolved oxygen is 5-6mg/L, the ambient temperature conditions are 20-23°C during the day, 18-20°C at night, the air humidity is 60-70%, and the _CO2 concentration is 1000ppm. Using the light environment provided by the present invention, the light intensity is set at 200-400 μmol/㎡·s, and the photoperiod is 10-15h/d. After 18-25 days of cultivation, brightly colored purple and red vegetables can be obtained quickly.

The technical solution provided by the present invention will be further described in detail with specific implementation examples below.

Implementation Case 1

Choose Zimei lettuce seeds with full seeds, soak the seeds of Zimei lettuce, sow them in sponge squares, 1 seed per hole, and then put them in a germination box at 23°C for germination. After the seeds are white, move them to the hydroponic nutrient solution Seedling management in the medium, the EC value of the nutrient solution is 0.8-1.2mS/cm, the pH is 6.0-7.0, until 4-5 true leaves are cultivated. Select neat and consistent seedlings with 4-5 true leaves for transplanting and planting on the planting board, the distance between planting rows is 15cm×20cm, and put them in the nutrient solution tank for cultivation. The nutrient solution film cultivation technology is adopted, and the nutrient solution EC control Between 1.6-1.8, the pH is 6.0-7.0, until the harvest, the whole planting period is 20 days, and during the whole planting period, the temperature of the nutrient solution is controlled at 21°C, the dissolved oxygen is 5-6mg/L, and the ambient temperature conditions are It is 21°C during the day and 18°C at night, and the air humidity is 60-70%. After transplanting and planting, fluorescent lamps were used as the light source, and LED light treatment was used. The LED light source was additionally set with 6 control examples and 6 example spectrums. The light intensity was 300 μmol/㎡·s, and the photoperiod was 11 h/d. Cultivate Zimei lettuce according to the above-mentioned cultivation method, and use the light source parameters as each embodiment and control example. After 20 days of planting, the relevant morphological data of each embodiment and control example are counted. The experimental results are shown in Table 1:

Table 1

The test results show that: compared with the 7 control examples, the Zimei lettuce cultivated under the treatment of Examples 1-6 not only has darker leaf color, but also has higher yield, avoiding the problem of coloring but yield reduction.

Implementation Case 2

Choose red rosa lettuce seeds with full grains, soak the seeds of red rosa lettuce, sow them in sponge squares, 1 seed per hole, and then put them in a germination box at 23°C for germination. After the seeds are white, move them to hydroponics Seedling management is carried out in the nutrient solution, the EC value of the nutrient solution is 0.8-1.2mS/cm, the pH is 6.0-7.0, until 4-5 true leaves are cultivated. Select neat and consistent seedlings with 4-5 true leaves for transplanting and planting on the planting board, the distance between planting rows is 15cm×20cm, and put them in the nutrient solution tank for cultivation. The nutrient solution film cultivation technology is adopted, and the nutrient solution EC control Between 1.6-1.8, the pH is 6.0-7.0, until harvesting, the whole planting period is 22 days, and during the whole planting period, the temperature of the nutrient solution is controlled at 21°C, the dissolved oxygen is 5-6mg/L, and the ambient temperature conditions are It is 21°C during the day and 18°C at night, and the air humidity is 60-70%. After transplanting and planting, fluorescent lamps were used as the light source, and LED light treatment was adopted. The LED light source was additionally set with 6 control examples and 6 example spectrums, with a light intensity of 250μmol/㎡·s and a photoperiod of 12.5h/d. The red rosa lettuce was cultivated according to the above-mentioned cultivation method, and the light source parameters were used as each embodiment and control example. After 22 days of planting, the relevant morphological data of each embodiment and control example were counted. The experimental results are shown in Table 2:

Table 2

The test results show that: compared with the 7 control examples, the red rosa lettuce cultivated under the treatment of Examples 1-6 not only has darker leaf color, but also has higher yield, avoiding the problem of coloring but yield reduction.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or end-equipment. Without further limitations, an element defined by the words "comprising..." or "comprising..." does not exclude the presence of additional elements in the process, method, article or terminal device comprising said element. In addition, in this article, "greater than", "less than", "exceeding" and so on are understood as not including the original number; "above", "below", "within" and so on are understood as including the original number.

Although the above-mentioned embodiments have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept, so the above-mentioned are only the implementation of the present invention For example, it is not intended to limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other related technical fields, is also included in this patent. Inventions within the scope of patent protection.

Claims

A light environment for indoor purple and red lettuce production, characterized in that the wavelength range of the light environment is 380-780nm, wherein the number of light quanta with a wavelength in the range of 500-599nm accounts for 10% of the total number of light quanta in the range of 380-780nm The ratio is 0%, the ratio of the sum of the number of photons with a wavelength in the range of 700-780nm to the number of photons with a wavelength in the range of 600-699nm to the number of photons with a wavelength in the range of 400-499nm is 1.0-1.4:1, and the wavelength The number of photons in the range of 700-780nm accounts for 12-17% of the total number of photons in the range of 380-780nm.
A light environment for indoor purple and red lettuce production according to claim 1, characterized in that the number of light quanta with a wavelength in the range of 400-499nm accounts for 41-50% of the total number of light quanta in the range of 380-780nm.
A light environment for indoor purple and red lettuce production according to claim 1 or 2, wherein the ratio of the number of photons with wavelengths in the range of 600-699nm to the total number of photons in the range of 380-780nm is 33-46 %.
A light environment for indoor purple and red lettuce production according to claim 1 or 2, characterized in that, for the light environment, the light intensity is set to 200-400 μmol/㎡·s, and the photoperiod is 10-15h/ d.
A light environment for indoor production of purple and red lettuce according to claim 1 or 2, characterized in that the light environment is used during the period of planting purple and red lettuce.