Method for raising pepper seedlings by adopting fluctuating light

Abstract

The invention discloses a pepper seedling raising method adopting fluctuating light, which comprises the following steps: (1) placing pepper seedlings in a dark environment, installing an LED lamp panel, and controlling the light intensity, the light ratio and the light period of red light and blue light of the LED lamp panel through a programmable logic controller; (2) the light intensity, the light ratio and the light period of red light and blue light of the LED lamp panel are set respectively; (3) starting the LED lamp panel, monitoring whether the actual light intensity and the light ratio of the red light and the blue light of the LED lamp panel are consistent with the set value or not, and if not, adjusting the measured value according to the set value; and (4) monitoring the growth state of the pepper seedlings, and moving the pepper seedlings out of the seedling raising environment with fluctuating light after the pepper seedlings are grown. On the basis of accurately controlling the light intensity and the light ratio, the fluctuation light change period is strictly set, the illumination energy consumption of the plant factory and the self loss caused by long-time use of equipment are reduced, and the overall operation energy consumption and the daily maintenance cost of the equipment of the plant factory are greatly reduced.

Description

Technical Field

[0001] The invention belongs to the field of wave light seedling cultivation, and in particular relates to a method for cultivating pepper seedlings by using wave light. Background Art

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

[0003] In order to achieve the purpose of reducing energy consumption and increasing efficiency as well as efficient seedling cultivation in plant factories, the present invention proposes a method for cultivating pepper seedlings using fluctuating light. During the cultivation of pepper seedlings, the light cycle and light intensity of the seedling LED lamp can be precisely controlled in a timely, quantitative and segmented manner by adopting the fluctuating light irradiation method, thereby avoiding long-term, high-brightness continuous irradiation of the LED lamp, thereby achieving the purpose of reducing the energy consumption of the plant factory.

[0004] The technical solution adopted by the present invention is: a method for raising pepper seedlings using fluctuating light, comprising the following steps:

[0005] (1) placing pepper seedlings in a dark environment, installing an LED light board with red and blue light beads above the pepper seedlings, and controlling the light intensity, light ratio and light cycle of the red and blue light of the LED light board through a programmable logic controller;

[0006] (2) Operate the programmable logic controller to set the light intensity, light ratio and light cycle of the red and blue lights 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 lights of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​to adjust the red and blue light parameters of the LED light board;

[0008] (4) Monitor the growth status of pepper seedlings and move them out of the fluctuating light environment after they have matured.

[0009] The LED wave light further includes two light qualities: red light and blue light, and both have two light modes: strong light and weak light.

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

[0011] The further described fluctuating red and blue light is: when the red and blue lights are turned on at the same time, the strong and weak red and blue lights are combined with each other to change alternately.

[0012] The wavelength of the red light LED lamp bead is further described to be 620nm, and the wavelength of the blue light LED lamp bead is 420nm.

[0013] The light cycle of the LED light panel is further described as 24 hours, wherein the light period is 15 hours and the dark period is 9 hours, and the fluctuating light is executed according to the set fluctuating light program during the light period.

[0014] The steps for starting the wave light program during the light period are further described as (1) to (4), wherein:

[0015] (1) Turn on the LED light panel’s strong red light and strong blue light modes at the same time, with a total light intensity of 200 μmol / m 2 / s, light ratio red light: blue light = 3:1, irradiation 5min;

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

[0017] (3) The strong red light and weak blue light modes were turned on simultaneously, with a total light intensity of 175 μmol / m 2 / s, light ratio red light: blue light = 6:1, irradiation for 3 min;

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

[0019] Steps (1) to (4) constitute a light cycle period, and the light cycle period is repeated repeatedly during the light cycle period until the light cycle period expires, and then the dark period begins, and then the next light cycle period begins.

[0020] When the pepper seedlings are cultivated to 6 to 8 leaves under the LED fluctuating light environment, they are mature seedlings. At this time, they can be moved out of the light environment and transplanted.

[0021] The switching sequence of the fluctuating light program is 5 minutes of strong red light and strong blue light, 1 minute of weak red light and strong blue light, 3 minutes of strong red light and weak blue light, and 1 minute of weak red light and weak blue light, ensuring that the total light intensity of red and blue light maintains strong and weak fluctuations during the illumination period. The advantage of setting the fluctuating light change in this way is that every time the red light content in the light quality is increased, the elongation of internodes can be inhibited, lateral branches can be promoted, and it is beneficial to cultivate strong seedlings; every time the blue light content in the light quality is increased, the opening of stomata can be promoted, and the photosynthesis efficiency of plants can be increased.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are: on the basis of ensuring that the basic lighting time required for the normal growth of peppers is met, by adopting a fluctuating LED light lighting mode, that is, alternating combinations of strong and weak red and blue light, it greatly alleviates the equipment heating and loss problems caused by long-term continuous operation of LED lamps, and greatly reduces the lighting energy consumption of plant factories, saving overall operating costs. DETAILED DESCRIPTION

[0023] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0024] Example

[0025] A method for raising pepper seedlings using fluctuating light, which avoids long-term use of LED lamps at high brightness by setting a method of alternating strong and weak LED red and blue light lighting, not only greatly reduces the lighting energy consumption, but also has a positive effect on plant growth and development, and is of great significance for reducing the energy consumption cost of raising seedlings in plant factories and improving the efficiency of raising seedlings in plant factories.

[0026] The method comprises the following steps:

[0027] (1) placing pepper seedlings in a dark environment, installing an LED light board with red and blue light beads above the pepper seedlings, and controlling the light intensity, light ratio and light cycle of the red and blue light of the LED light board through a programmable logic controller;

[0028] (2) Operate the programmable logic controller to set the light intensity, light ratio and light cycle of the red and blue lights 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 lights of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​to adjust the red and blue light parameters of the LED light board;

[0030] (4) Monitor the growth status of pepper seedlings and move them out of the fluctuating light environment after they have matured.

[0031] The wavelength of the red LED lamp beads used is 620nm, and the wavelength of the blue LED lamp beads is 420nm. The two types of lamp beads are evenly distributed on the light board. LED fluctuating light contains two light qualities, red and blue, and both have strong and weak light modes. The light cycle of the LED light board is 24h, of which the light period is 15h and the dark period is 9h. The fluctuating light is executed according to the set fluctuating light program during the light period. Fluctuating red and blue light means that when the red and blue lights are turned on at the same time, the strong and weak red and blue lights are combined and changed alternately. The intensity of strong red light is 150μmol / m 2 / s, the intensity of strong blue light is 50μmol / m 2 / s; the weak red light intensity is 75μmol / m 2 / s, the weak blue light intensity is 25μmol / m 2 / s. The steps for starting the wave light program during the illumination period are (1)-(4), where:

[0032] (1) Turn on the LED light panel’s strong red light and strong blue light modes at the same time, with a total light intensity of 200 μmol / m 2 / s, light ratio red light: blue light = 3:1, irradiation 5min;

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

[0034] (3) The strong red light and weak blue light modes were turned on simultaneously, with a total light intensity of 175 μmol / m 2 / s, light ratio red light: blue light = 6:1, irradiation for 3 min;

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

[0036] Steps (1) to (4) constitute a light cycle period, and the light cycle period is repeated repeatedly during the light cycle period until the light cycle period expires, and then the dark period begins, and then the next light cycle period begins.

[0037] When the pepper seedlings are cultivated to 6 to 8 leaves under the LED fluctuating light environment, they are mature seedlings. At this time, they can be moved out of the light environment and transplanted.

[0038] The switching sequence of the fluctuating light program is 5 minutes of strong red light and strong blue light, 1 minute of weak red light and strong blue light, 3 minutes of strong red light and weak blue light, and 1 minute of weak red light and weak blue light, ensuring that the total light intensity of red and blue light maintains strong and weak fluctuations during the lighting period. The advantage of setting up fluctuating light changes in this way is that every time the red light content in the light quality is increased, the elongation of internodes can be inhibited, lateral branches can be promoted, and it is beneficial to cultivate strong seedlings; every time the blue light content in the light quality is increased, the opening of stomata can be promoted, and the photosynthesis efficiency of plants can be increased. At the same time, the lighting method of changing the intensity of red and blue light greatly reduces the lighting energy consumption cost and improves the efficiency of seedling cultivation compared to the stable and continuous lighting method of red and blue light in conventional factory seedling cultivation.

[0039] Comparative Example

[0040] The similarities between the comparative examples and the embodiments are not repeated here, except that the red and blue light in each comparative example is always in the strong light mode during the 15h illumination period. The comparative examples and the examples 1, 2, 3, and 4 only represent different test individuals under the same treatment. The various indicators of the pepper plants of the embodiments and comparative examples were measured, and the test results are as follows:

[0041]

[0042] From the above, it can be seen that the technical solution of the present invention, which is a method for raising pepper seedlings using fluctuating light, has invented a method for raising seedlings using alternating combination lighting of strong and weak LED red and blue lights. Compared with conventional seedling lighting methods, it further improves various indicators such as pepper morphology, chlorophyll content and photosynthetic rate, without affecting the normal growth of pepper seedlings, and plays a positive role in pepper growth. At the same time, it avoids the long-term use of LED lamps at high brightness, which not only greatly reduces the energy consumption of lighting, but also extends the service life of LED lamps, which is of great significance for reducing the energy consumption cost of seedling raising in plant factories and improving the seedling raising efficiency of plant factories.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for raising pepper seedlings using fluctuating light, characterized in that: The following steps are involved: (1) placing pepper seedlings in a dark environment, installing an LED light board with red and blue light beads above the pepper seedlings, and controlling the light intensity, light ratio and light cycle of the red and blue light of the LED light board through a programmable logic controller; (2) Operate the programmable logic controller to set the light intensity, light ratio and light cycle of the red and blue lights 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 lights of the LED light board are consistent with the set values. If they are inconsistent, adjust the measured values ​​according to the set values ​​to adjust the red and blue light parameters of the LED light board; (4) Monitor the growth status of pepper seedlings and move them out of the fluctuating light environment after they have matured.

2. The method for raising pepper seedlings using fluctuating light according to claim 1, characterized in that: The LED wave light includes two light qualities, red light and blue light, and both have two light modes, strong light and weak light.

3. The method for raising pepper seedlings using fluctuating light according to claim 2, characterized in that: The intensity of strong red light is 150 μmol / m 2 / s, the intensity of strong blue light is 50μmol / m 2 / s; the weak red light intensity is 75μmol / m 2 / s, the weak blue light intensity is 25μmol / m 2 / s.

4. The method for raising pepper seedlings using fluctuating light according to claim 1, characterized in that: Fluctuating red and blue light means that when the red and blue lights are turned on at the same time, the strong and weak red and blue lights are combined and changed alternately.

5. The method for raising pepper seedlings using fluctuating light according to claim 1, characterized in that: The wavelength of red LED lamp beads is 620nm, and the wavelength of blue LED lamp beads is 420nm.

6. The method for raising pepper seedlings using fluctuating light according to claim 1, characterized in that: The light cycle of the LED light panel is 24 hours, including 15 hours of light period and 9 hours of dark period. The fluctuating light is executed according to the set fluctuating light program during the light period.

7. The method for raising pepper seedlings using fluctuating light according to claim 5, characterized in that: The steps to start the WaveLight program are (1)-(4), where: (1) Turn on the LED light panel’s strong red light and strong blue light modes at the same time, with a total light intensity of 200 μmol / m 2 / s, light ratio is red light: blue light = 3:1, irradiation for 5 min; (2) Simultaneously turn on the weak red light and strong blue light modes for combined irradiation, with a total light intensity of 125 μmol / m 2 / s, light quality ratio red light: blue light = 3:2, irradiation 1min; (3) The strong red light and weak blue light modes were turned on simultaneously, with a total light intensity of 175 μmol / m 2 / s, light quality ratio red light: blue light = 6:1, irradiation 3min; (4) Simultaneously turn on the weak red light and weak blue light modes for combined irradiation, with a total light intensity of 100 μmol / m 2 / s, light quality ratio red light: blue light = 3:1, irradiation 1min; Steps (1) to (4) constitute a light cycle period, and the light cycle period is repeated repeatedly during the light cycle period until the light cycle period expires, and then the dark period begins, and then the next light cycle period begins.

8. The method for raising pepper seedlings using fluctuating light according to claim 1, characterized in that: When the pepper seedlings are cultivated to 6 to 8 leaves under the LED fluctuating light environment, they are mature seedlings. At this time, they can be moved out of the light environment and transplanted.

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