KR20160092135A - Lighting source for plant production and cultivation method using this - Google Patents

Abstract

A light source for plant growth according to an embodiment of the present invention comprises a red light source having a peak wavelength in the range of 630-690 nm and a near-infrared light source having a peak wavelength in the range of 700-750 nm at a ratio of 1:0.1-2. The use of the present invention can promote the growth of seedlings more efficiently even when the same amount of energy is used in plant growth facilities using artificial illumination.

Description

TECHNICAL FIELD [0001] The present invention relates to a light source for plant production and a plant cultivation method using the same. BACKGROUND ART [0002] LIGHTING SOURCE FOR PLANT PRODUCTION AND CULTIVATION METHOD USING THIS}

The present invention relates to a light source for biological growth used in a plant plant and the like, a plant light source for increasing the plant growth by adding a near infrared light source to a red light source or a red light source and a blue light source, And a plant cultivation method using the same.

Recently, biotechnology and agricultural technology using plant factories have become popular. This technology, which uses photosynthetic plants to grow photosynthesis in the leaves, uses artificial light similar to sunlight for the progress of plant photosynthesis, and fluorescent lights and light emitting diodes are used. In particular, the LED, which is a light emitting diode, is utilized as a light source that facilitates the growth of plants by allowing a user to easily select a desired wavelength. The composition of the light source mainly used is mainly the wavelength of the red light and the blue light, which are mainly useful for plant growth. However, research on light sources is continuing in order to achieve the best effect in crop production.

1. Plant factory LED lighting device and its manufacturing method, Application No. 10-2010-0028266, May 27, 2010 Announcement

An object of the present invention is to provide a method for maximizing plant growth, particularly biomass in a building, by regulating a light source for biological growth such as an LED used in a plant plant, and further providing near infrared light in red light, And to increase the productivity of lettuce cultivation in the artificial light cultivation system using LED especially by adjusting the ratio thereof.

In order to achieve the above object, a light source for plant growth according to an embodiment of the present invention includes a red light source having a peak wavelength in a range of 630 to 680 nm, a near-infrared light source having a peak wavelength in a range of 700 to 750 nm The light source is included in a ratio of 1: 0.1 to 2.

The plant growth light source may include the red light source and the near-infrared light source in a ratio of 1: 0.5 to 1.2, or 1: 0.1 to 0.2.

The plant growth light source may further include a blue light source having a peak wavelength of 430 to 470 nm, and the ratio of the red light source to the blue light source may be 1: 0.1 to 1.

The plant growth light source may include the red light source and the near-infrared light source in a ratio of 1: 0.5 to 1.2.

A plant cultivation method according to another embodiment of the present invention is a plant cultivation method comprising: mixing a red light source having a peak wavelength in a range of 630 to 680 nm and a near infrared light source having a peak wavelength in a range of 700 to 750 nm in a ratio of 1: And irradiating the light from the light source for plant growth to the leaf vegetables.

Hereinafter, the present invention will be described in more detail.

Plant plants use red light as a light source or mixed light of red light and blue light. However, the inventors of the present invention have recognized the problem that when the plant is grown by irradiating the mixed light of the red light, the red light and the blue light, the growth of the plant is insufficient.

The light source for plant growth according to an embodiment of the present invention includes a near-infrared light source together with a red light source. The red light source may be an LED illumination whose peak wavelength is in a range of 630 to 680 nm, and the near-infrared light source may be an LED illumination whose peak wavelength is in a range of 700 to 750 nm.

The red light source and the near-infrared light source may be included in the plant growth light source at a ratio of 1: 0.1 to 2. When the red light source and the near infrared light source are included together in this range, the productivity of the crop can be increased even if light having the same photosynthetic photon density is irradiated.

The light source for plant growth may include a red light source and a near infrared light source at a ratio of 1: 0.5 to 1.2. In this case, the growth of the plant top part is excellent and the growth of the underground part is also excellent. Thus, the S / R ratio Crown Ratio) can lower plant growth.

The light source for plant growth may include a red light source and a near infrared light source at a ratio of 1: 0.1 to 0.2, and the growth of the ground part may be improved while maintaining the growth of the plant ground part appropriately.

When cultivating a crop such as lettuce, the red light source and the near-infrared light source are mixed at a ratio of 1: 0.5 to 1.2, more preferably 1: 0.7 to 1.1 It is best to apply the highest biomass measured by dry weight at harvest time.

The plant growth light source may further include a blue light source for the red light source and the near infrared light source, and the blue light source may be LED light having a peak wavelength of 430 to 470 nm. In the case where the light source for plant growth further includes a blue light source, it is possible to reduce the artifacts of the crops which may be caused by the light source and temperature, and to improve the growth promotion.

The light source for plant growth may include a ratio of a red light source to a blue light source in a ratio of 1: 0.1 to 1, and may include a ratio of 1: 0.15 to 0.5. At this time, the same productivity of crops can be increased by irradiating light having the same photosynthetic photon density.

When the plant growth light source includes a red light source, a blue light source and a near-infrared light source, the ratio thereof may be 1: 0.1 to 1: 0.1 to 2 (red light source: blue light source: near infrared light source) May be 1: 0.15 to 0.5: 0.5 to 1.7. At this time, the crop can be grown so as to have a better biomass amount as compared with the case of using a conventional fluorescent lamp or a red light source and a blue light source. In addition, more preferably, the light source for biological growth includes a red light source, a blue light source and a near-infrared light source in a ratio of 1: 0.2 to 0.3: 0.6 to 1. At this time, since the growth of the plant top part is excellent and the growth of the underground part is also excellent, the plant can be grown at a low S / R ratio (Shoot / Root ratio), and the crop can be grown with excellent efficiency. When a light source composed of a red light source, a blue light source and a near-infrared light source are used together at the same energy amount, the light source is adjusted so as to be in a ratio of 1: 0.2 to 0.3: 0.7 to 0.9, Can be maximized. In particular, when the total energy of the light sources is below 150 μmol · m ^-2 · s ^-1 based on the seedlings of the six sphere, when the red light, the blue light and the near-infrared light source are used simultaneously, the efficiency of the plant growth is maximized .

The plant cultivation method according to another embodiment of the present invention provides a method of cultivating a plant using light emitted from the light source for plant growth described above. Using this method, it is particularly effective for growing leafy vegetables including lettuce, and all kinds of vegetables (pepper, tomato, cabbage, paprika, etc.). Since the description of the light source for plant growth is the same as that described above, the description thereof will be omitted.

The light source for plant growth of the present invention and the plant cultivation method using the same provide a light source and a method capable of efficiently promoting the growth of a seedling in a plant growth facility using artificial light (LED, etc.). In particular, the efficiency of plant growth is increased by using near-infrared light which has not been used in the past with red light or red light + blue light. Using such a light source, even if the same amount of light source energy is used, Crops can grow.

FIG. 1 is a graph showing the wavelength and intensity of six light sources applied to six treatments in Experiment 1. FIG.
Fig. 2 is a photograph showing a comparison of the growth rate and the leaf size of the lettuce samples of the treatment group grown for 22 days after the formulation in Experiment 1. Fig.
3 is a graph showing the wavelength and intensity of six light sources applied to six treatments in Experiment 2. FIG.
FIG. 4 is a photograph showing a comparison of the degree of growth and leaf size of the lettuce samples grown at 24 days after the planting in Experiment 2.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Experiment 1: Growth experiment of lettuce using red light and near infrared light

(Peak wavelength 660 nm) and near-infrared light (peak wavelength 735 m) using only red light (indicated by red, R) and near-infrared light (indicated by Far-red, FR) In the closed plant production system, lettuce growth experiment of Lactuca sativa cv. 'Sunmang' species was conducted.

Samples of the examples in which the ratios of the red light source and the near-infrared light source were differently applied were used in one sample and control samples in which fluorescent light was applied were used in one sample. In this case, when red light and near infrared light are simultaneously applied, the ratio of the red light source to the near infrared light source is 1: 1.43 (sample 1), 1: 0.83 (sample 2), 1: 0.24 4) and 100% of red light (R) not including near-infrared light (see FIG. 1, wavelength and intensity of each light source).

In order to exclude the effect of plant growth on total photosynthetic photon flux (PPF), the total light source irradiated to the above six treatments was 131.71 ± 7 μmol · m ^-2 · s ^{-1 in the} same PPF And lettuce was cultivated using the same growth chamber for 12 hours. The temperature was 20 ° C and the humidity (RH) was 60%.

In order to compare the growth of lettuce cultivated in Experiment 1, weights were measured at the top and bottom of each lettuce on the 11th and 22nd days after each meal, using an electronic balance. After drying for 72 hours, the weight was measured. The results are summarized in Table 1 below.

After the ceremony
Day (Day) Sample number Shoot Root S / R ratio Fresh weight
(FW, g / plant) In building
(DW, g / plant) Fresh weight
(FW, g / plant) In building
(DW, g / plant) 11 Control
(Fluorescent lamp) 2.74 c 0.129 d 0.22 c 0.02 12.45 b Sample 1
(R / FR 1 / 1.43) 5.54 a 0.181 bc 0.21 c 0.02 26.38 a Sample 2
(R / FR 1 / 0.83) 4.81 ab 0.174 c 0.25 bc 0.02 19.24 ab Sample 3
(R / FR 1 / 0.24) 4.10 b 0.153 cd 0.35 ab 0.03 11.71 b Sample 4
(R / FR 1 / 0.12) 5.24 a 0.213 a 0.38 a 0.03 13.79 b Sample 5 (R) 5.31 a 0.208 ab 0.38 a 0.03 13.97 b Significance *** *** * NS . * 22 Control
(Fluorescent lamp) 11.10 c 0.47 c 0.76 c 0.045 c 14.61 d Sample 1
(R / FR 1 / 1.43) 25.21 ab 0.99 ab 0.81 c 0.052 bc 31.12 a Sample 2
(R / FR 1 / 0.83) 31.20 a 1.25 a 1.78 a 0.105 a 17.53 c Sample 3
(R / FR 1 / 0.24) 23.26 b 0.91 b 1.14 bc 0.063 bc 20.40 b Sample 4
(R / FR 1 / 0.12) 29.17 ab 1.17 ab 1.40 ab 0.072 b 20.84 b Sample 5 (R) 25.32 ab 1.01 ab 1.22 b 0.074 b 20.75 b Significance *** *** *** *** ***

Significance, P = 0.05 or less (*), 0.01 or less (**), 0.001 or less (***), NS: no significance

In addition, the degree of growth and leaf size of the samples grown for 22 days after the preparation were compared with photographs and shown in FIG.

Referring to Table 1 and FIG. 2, the highest value was obtained in sample 2 (R / FR = 1 / 0.83) in the result of the live weight of the ground part and the ground part and the building part on the 22nd day of the final growth measurement. The weight of lettuce was higher in sample 2 (R / FR = 1 / 0.83) than that of red (100%) red treatment without infrared (Far-red) , The S / R ratio was the lowest at this ratio, confirming that Sample 2 (R / FR = 1 / 0.83) had a positive effect on both growth at the top and bottom. In addition, the growth of lettuce was significantly increased compared with the use of a fluorescent lamp as a light source.

Experiment 2: Growth experiment of lettuce using blue light, red light, and near infrared light

In the second experiment, the ratio of the light sources of the fluorescent light and the light source of the near-infrared light (the same as Experiment 1), the blue light (indicated by Blue, B, peak wavelength 440 nm) And various growth treatments were carried out. The conditions of all the experiments except for the below mentioned were the same as those of experiment 1 above.

The ratio of the red light source, the blue light source and the near-infrared light source was 1: 0.25: 1.43 (sample 1), 1: 0.25: 0.83 (sample 2), 1: 0.25: (Sample 4) and 1: 0.25 (Sample 5) of a red light source and a blue light source which did not contain near infrared light (see FIG. 3), and as a light source of the control, blue and red And a fluorescent lamp having a plurality of peaks.

In order to compare the growth of lettuce cultivated in Experiment 2, the growth state was confirmed by each treatments on the 12th day and the 24th day after each of the treatments, and the results are summarized in Table 2 below. And the size of the leaves are shown in FIG. 4 as photographs.

After the ceremony
Day (Day) Sample number Shoot Root S / R ratio Fresh weight
(FW, g / plant) In building
(DW, g / plant) Fresh weight
(FW, g / plant) In building
(DW, g / plant) 12 Control
(Fluorescent lamp) 2.74 c 0.129 d 0.22 c 0.02 12.45 b Sample 1
(R / B / FR = 1 / 0.25 / 1.43) 5.54 a 0.181 bc 0.21 c 0.02 26.38 a Sample 2
(R / B / FR = 1 / 0.25 / 0.83) 4.81 ab 0.174 c 0.25 bc 0.02 19.24 ab Sample 3
(R / B / FR = 1 / 0.25 / 0.24) 4.10 b 0.153 cd 0.35 ab 0.03 11.71 b Sample 4
(R / B / FR = 1 / 0.25 / 0.12) 5.24 a 0.213 a 0.38 a 0.03 13.79 b Sample 5
(R / B = 1 / 0.25) 5.31 a 0.208 ab 0.38 a 0.03 13.97 b Significance *** *** * NS . * 24 Control
(Fluorescent lamp) 11.10 c 0.47 c 0.76 c 0.045 c 14.61 d Control
(Fluorescent lamp) 25.21 ab 0.99 ab 0.81 c 0.052 bc 31.12 a Sample 1
(R / B / FR = 1 / 0.25 / 1.43) 31.20 a 1.25 a 1.78 a 0.105 a 17.53 c Sample 2
(R / B / FR = 1 / 0.25 / 0.83) 23.26 b 0.91 b 1.14 bc 0.063 bc 20.40 b Sample 3
(R / B / FR = 1 / 0.25 / 0.24) 29.17 ab 1.17 ab 1.40 ab 0.072 b 20.84 b Sample 4
(R / B / FR = 1 / 0.25 / 0.12) 25.32 ab 1.01 ab 1.22 b 0.074 b 20.75 b Sample 5
(R / B = 1 / 0.25) *** *** *** *** ***

Significance, P = 0.05 or less (*), 0.01 or less (**), 0.001 or less (***), NS: no significance

Referring to Table 2 and FIG. 4, it can be seen that overall lettuce growth was increased in the samples containing near infrared light compared to the control sample (Sample 5) containing no fluorescent light and near infrared light . On the 24th day of the final harvest, the highest value was found in sample 2 in the ground and underground live weight and in the building, and the ratio of the ground part to the ground part was found to be low in S / R ratio in Sample 2, This means that not only the growth of the above ground but also the growth of the underground part is also increased compared to other treatments.

When the red light source and the near infrared light source are used together at a ratio of 1: 0.83, the growth of lettuce can be confirmed when the red light source, the blue light source and the near infrared light source are used together at a ratio of 1: 0.25: 0.83.

Particularly, compared to the case of using a fluorescent lamp which is hardly irradiated with near infrared rays as a light source (control) and a case of mixing a blue light source and a red light source (Sample 5 of Experiment 2), the ratio of the red light source and the near infrared light source is 1: 0.83 It was confirmed that the growth of the lettuce was higher than that of the lettuce, especially in the DW. This indicates that the biomass in the lettuce was increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

Claims (5)

A red light source having a peak wavelength in a range of 630 to 680 nm and a near infrared light source having a peak wavelength in a range of 700 to 750 nm in a ratio of 1: 0.1 to 2. The method according to claim 1,
Wherein the plant growth light source comprises the red light source and the near-infrared light source in a ratio of 1: 0.5 to 1.2, or 1: 0.1 to 0.2. The method according to claim 1,
Wherein the plant growth light source further comprises a blue light source having a peak wavelength of 430 to 470 nm and a ratio of the red light source and the blue light source is 1: 0.1 to 1. The method of claim 3,
Wherein the plant growth light source comprises the red light source and the near-infrared light source in a ratio of 1: 0.5 to 1.2. A red light source having a peak wavelength in a range of 630 to 680 nm and a near infrared light source having a peak wavelength in a range of 700 to 750 nm in a ratio of 1: A method of plant cultivation, comprising the step of irradiating.

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