A method for raising pepper seedlings using fluctuating light

Abstract

The application discloses a kind of wave light is carried out to pepper seedling's seedling raising method, comprising the following steps: (1) placing pepper seedling in dark environment, installation LED lamp plate, the light intensity, light ratio and photoperiod of red, blue light of LED lamp plate are controlled by programmable logic controller;(2) the light intensity, light ratio and photoperiod of red, blue light of LED lamp plate are set respectively;(3) start LED lamp plate, whether the actual light intensity and light ratio of red, blue light of LED lamp plate are consistent with set value is monitored, when it is not consistent, measured value is adjusted according to set value;(4) the growth state of pepper seedling is monitored, after seedling, remove the seedling raising environment of wave light.The application is based on the precise control of light intensity and light ratio, strictly sets wave light change period, reduces the self consumption caused by lighting energy consumption and equipment long time use of plant factory, greatly reduces the overall operation energy consumption and routine maintenance cost of plant factory equipment.

Description

Technical Field

[0001] This invention belongs to the field of wave light seedling cultivation, and particularly relates to a method for cultivating pepper seedlings using wave light. Background Technology

[0002] In recent years, with the continuous expansion of chili pepper planting area, conventional seedling cultivation methods have become increasingly unsuitable for the needs of rapid market development due to their prominent problems such as large seed consumption, low seedling quality, and high production costs. The use of plant factories for seedling cultivation has become a current trend. Energy consumption has always been a key concern when using plant factories to cultivate chili pepper seedlings. How to reduce the lighting energy consumption of plant factories without affecting the normal light requirements of plants and ensuring normal plant growth and development is of great significance for saving operating costs of plant factories and improving seedling cultivation efficiency. Summary of the Invention

[0003] To achieve the goals of energy reduction and efficiency improvement in plant factories and high-efficiency seedling cultivation, this invention proposes a seedling cultivation method for chili pepper seedlings using wave-like light. During the seedling cultivation process, the light cycle and intensity of the seedling LED lamps can be precisely controlled in a timed, quantitative, and segmented manner by using wave-like light irradiation, avoiding prolonged and continuous high-brightness irradiation of the LED lamps, thereby reducing the energy consumption of the plant factory.

[0004] The technical solution adopted in this invention is: a method for raising pepper seedlings using wave light, comprising the following steps:

[0005] (1) Place the chili seedlings in a dark environment and install an LED light panel with red and blue light beads above the chili seedlings. Control the light intensity, light ratio and light period of the red and blue light of the LED light panel through a programmable logic controller.

[0006] (2) The programmable logic controller is used to set the light intensity, light ratio and light period of the red and blue light of the LED light board respectively;

[0007] (3) Start the LED light board and monitor whether the actual light intensity and light ratio of the red and blue light of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​and adjust the red and blue light parameters of the LED light board.

[0008] (4) Monitor the growth status of chili seedlings and remove them from the seedling environment with fluctuating light after they have matured.

[0009] Furthermore, the LED wave light includes both red and blue light qualities, and both have strong and weak light modes.

[0010] The intensity of the strong red light described further is 150 μmol / m 2 / s, the intensity of strong blue light is 50μmol / m2 / s; the intensity of weak red light is 75 μmol / m 2 / s, the intensity of weak blue light is 25μmol / m 2 / s.

[0011] The further described wave of red and blue light refers to the alternating combination of strong and weak red and blue light when red and blue light are turned on simultaneously.

[0012] Furthermore, the wavelength of the red LED beads is 620nm, and the wavelength of the blue LED beads is 420nm.

[0013] Furthermore, the light cycle of the LED light panel is 24 hours, including a 15-hour illumination period and a 9-hour darkness period. During the illumination period, the wave light is executed according to the set wave light program.

[0014] The further described steps for initiating the wave light program during the illumination period are (1)-(4), wherein:

[0015] (1) Simultaneously turn on the LED light panel with a combination of strong red light and strong blue light modes for illumination, with a total light intensity of 200 μmol / m². 2 / s, light ratio red light: blue light = 3:1, irradiation for 5 minutes;

[0016] (2) Simultaneously activate the combined irradiation mode of weak red light and strong blue light, with a total light intensity of 125 μmol / m². 2 / s, light ratio red light: blue light = 3:2, irradiation for 1min;

[0017] (3) Simultaneously activate the combination of strong red light and weak blue light modes for illumination, with a total light intensity of 175 μmol / m². 2 / s, light ratio red light: blue light = 6:1, irradiation for 3 minutes;

[0018] (4) Simultaneously activate the combined irradiation mode of weak red light and weak blue light, with a total light intensity of 100 μmol / m². 2 / s, light ratio red light: blue light = 3:1, irradiation for 1min;

[0019] Steps (1)-(4) constitute one light cycle. During the light cycle, the light cycle repeats itself until the light cycle ends, when the dark period begins, and then the next light cycle begins.

[0020] When chili seedlings grow to 6-8 leaves under LED fluctuating light, they are considered mature seedlings. At this point, they can be removed from the light environment and transplanted.

[0021] The sequence of light-fluctuating cycles is 5 minutes of strong red and strong blue light, 1 minute of weak red and strong blue light, 3 minutes of strong red and weak blue light, and 1 minute of weak red and weak blue light, ensuring that the total intensity of red and blue light fluctuates throughout the photoperiod. The advantage of this light-fluctuating setting is that increasing the proportion of red light in the light quality can inhibit internode elongation and promote lateral branching, which is beneficial for cultivating strong seedlings; while increasing the proportion of blue light can promote stomatal opening and increase the plant's photosynthetic efficiency.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are as follows: while ensuring the basic light duration required for the normal growth of chili peppers, by adopting a fluctuating LED light illumination mode, that is, alternating combinations of strong and weak red and blue light, the problem of equipment heat generation and wear caused by long-term continuous operation of LED lights is greatly alleviated, and the energy consumption of lighting in plant factories is greatly reduced, thus saving overall operating costs. Detailed Implementation

[0023] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0024] Example

[0025] A method for cultivating chili seedlings using wave-like light is proposed. By setting up alternating combinations of strong and weak LED red and blue light, the method avoids prolonged use of LED lights at high brightness, which not only greatly reduces the energy consumption of lighting, but also has a positive effect on plant growth and development. This method is of great significance for reducing the energy consumption cost of seedling cultivation in plant factories and improving the efficiency of seedling cultivation in plant factories.

[0026] The method includes the following steps:

[0027] (1) Place the chili seedlings in a dark environment and install an LED light panel with red and blue light beads above the chili seedlings. Control the light intensity, light ratio and light period of the red and blue light of the LED light panel through a programmable logic controller.

[0028] (2) The programmable logic controller is used to set the light intensity, light ratio and light period of the red and blue light of the LED light board respectively;

[0029] (3) Start the LED light board and monitor whether the actual light intensity and light ratio of the red and blue light of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​and adjust the red and blue light parameters of the LED light board.

[0030] (4) Monitor the growth status of chili seedlings and remove them from the seedling environment with fluctuating light after they have matured.

[0031] The red LEDs used have a wavelength of 620nm, and the blue LEDs have a wavelength of 420nm, with both types of LEDs evenly distributed on the light panel. The LED wave light includes both red and blue light qualities, and each has strong and weak light modes. The light cycle of the LED light panel is 24 hours, with a 15-hour illumination period and a 9-hour darkness period. During the illumination period, the wave light executes according to the set wave light program. Wave red and blue light refers to the alternating combination of strong and weak red and blue light when both are turned on simultaneously. The intensity of strong red light is 150μmol / m². 2 / s, the intensity of strong blue light is 50μmol / m 2 / s; the intensity of weak red light is 75 μmol / m 2 / s, the intensity of weak blue light is 25μmol / m 2 / s. The steps for initiating the wave light program during the illumination period are (1)-(4), where:

[0032] (1) Simultaneously turn on the LED light panel with a combination of strong red light and strong blue light modes for illumination, with a total light intensity of 200 μmol / m². 2 / s, light ratio red light: blue light = 3:1, irradiation for 5 minutes;

[0033] (2) Simultaneously activate the combined irradiation mode of weak red light and strong blue light, with a total light intensity of 125 μmol / m². 2 / s, light ratio red light: blue light = 3:2, irradiation for 1min;

[0034] (3) Simultaneously activate the combination of strong red light and weak blue light modes for illumination, with a total light intensity of 175 μmol / m². 2 / s, light ratio red light: blue light = 6:1, irradiation for 3 minutes;

[0035] (4) Simultaneously activate the combined irradiation mode of weak red light and weak blue light, with a total light intensity of 100 μmol / m². 2 / s, light ratio red light: blue light = 3:1, irradiation for 1min;

[0036] Steps (1)-(4) constitute one light cycle. During the light cycle, the light cycle repeats itself until the light cycle ends, when the dark period begins, and then the next light cycle begins.

[0037] When chili seedlings grow to 6-8 leaves under LED fluctuating light, they are considered mature seedlings. At this point, they can be removed from the light environment and transplanted.

[0038] The switching sequence of the fluctuating light program is 5 minutes of strong red and strong blue light, 1 minute of weak red and strong blue light, 3 minutes of strong red and weak blue light, and 1 minute of weak red and weak blue light, ensuring that the total intensity of red and blue light fluctuates throughout the illumination period. The advantage of this fluctuating light setting is that increasing the proportion of red light in the light quality can inhibit internode elongation and promote lateral branching, which is beneficial for cultivating strong seedlings; increasing the proportion of blue light in the light quality can promote stomatal opening and increase the plant's photosynthetic efficiency. At the same time, compared to the conventional stable and continuous red and blue light lighting method used in factory seedling cultivation, this fluctuating red and blue light lighting method significantly reduces lighting energy costs and improves seedling production efficiency.

[0039] Comparative Example

[0040] The similarities between the comparative and exemplary cases will not be repeated, the difference being that each comparative case maintained a strong red and blue light mode throughout the 15-hour light period. Comparative cases 1, 2, 3, and 4 of the exemplary cases represent different experimental individuals under the same treatment. The various indicators of the pepper plants in the exemplary and comparative cases were measured, and the experimental results are shown in the table below:

[0041]

[0042] As described above, the present invention provides a method for cultivating chili seedlings using wave-like light. This method employs alternating combinations of strong and weak LED red and blue light illumination. Compared to conventional lighting methods, this method further improves various indicators such as chili seedling morphology, chlorophyll content, and photosynthetic rate, thus playing a positive role in chili growth, without affecting the normal growth of the seedlings. Simultaneously, it avoids prolonged use of LED lights at high brightness, significantly reducing energy consumption and extending the lifespan of the LED lights. This is of great significance for reducing energy costs and improving the efficiency of seedling cultivation in plant factories.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for raising chili seedlings using wave light, characterized in that, Includes the following steps: (1) Place the chili seedlings in a dark environment and install an LED light panel with red and blue light beads above the chili seedlings. Control the light intensity, light ratio and light period of the red and blue light of the LED light panel through a programmable logic controller. (2) The programmable logic controller is used to set the light intensity, light ratio and light period of the red and blue light of the LED light board respectively; (3) Start the LED light board and monitor whether the actual light intensity and light ratio of the red and blue light of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​and adjust the red and blue light parameters of the LED light board. (4) Monitor the growth status of chili seedlings and remove them from the seedling environment with fluctuating light after they have matured. The wavelength of red LED beads is 620nm, and the wavelength of blue LED beads is 420nm; LED wave light includes both red and blue light qualities, and both have strong and weak light modes. The intensity of strong red light is 150 µmol / m². 2 / s, the intensity of strong blue light is 50µmol / m 2 / s; The intensity of weak red light is 75 µmol / m 2 / s, the intensity of weak blue light is 25µmol / m 2 / s; Fluctuating red and blue light means that when red and blue light are turned on at the same time, strong and weak red and blue light alternately. The steps for starting the wave light program are (1)-(4), where: (1) Simultaneously turn on the LED light panel with a combination of strong red light and strong blue light modes for illumination, with a total light intensity of 200µmol / m 2 / s, light ratio is red light: blue light = 3:1, irradiation for 5min; (2) Simultaneously activate the combined weak red light and strong blue light modes for irradiation, with a total light intensity of 125 µmol / m 2 / s, light quality ratio of red light:blue light = 3:2, irradiation for 1min; (3) Simultaneously activate the combination of strong red light and weak blue light modes for irradiation, with a total light intensity of 175 µmol / m 2 / s, light quality ratio of red light:blue light = 6:1, irradiation for 3 minutes; (4) Simultaneously activate the combined irradiation mode of weak red light and weak blue light, with a total light intensity of 100 µmol / m². 2 / s, light quality ratio of red light:blue light = 3:1, irradiation for 1min; Steps (1)-(4) constitute one light cycle. During the light cycle, the light cycle repeats until the light cycle ends, when the dark period begins, and then the next light cycle begins.

2. The method for raising chili seedlings using wave light according to claim 1, characterized in that: The light cycle of the LED light panel is 24 hours, including a 15-hour illumination period and a 9-hour darkness period. During the illumination period, the wave light is executed according to the set wave light program.

3. The method for raising chili seedlings using wave light according to claim 1, characterized in that: When chili seedlings grow to 6-8 leaves under LED fluctuating light, they are considered mature seedlings. At this point, they can be removed from the light environment and transplanted.

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