CN103718846A - Method for using LED light source to lower nitrate content in leaf vegetables - Google Patents
Method for using LED light source to lower nitrate content in leaf vegetables Download PDFInfo
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- CN103718846A CN103718846A CN201310721797.XA CN201310721797A CN103718846A CN 103718846 A CN103718846 A CN 103718846A CN 201310721797 A CN201310721797 A CN 201310721797A CN 103718846 A CN103718846 A CN 103718846A
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- leaf vegetables
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- 229910002651 NO3 Inorganic materials 0.000 title claims abstract description 20
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 235000021384 green leafy vegetables Nutrition 0.000 title claims abstract description 15
- 230000004907 flux Effects 0.000 claims abstract description 16
- 238000005286 illumination Methods 0.000 claims description 30
- 230000003203 everyday effect Effects 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 abstract description 17
- 235000013311 vegetables Nutrition 0.000 abstract description 13
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 abstract description 10
- 235000009337 Spinacia oleracea Nutrition 0.000 abstract description 10
- 210000000056 organ Anatomy 0.000 abstract description 3
- 230000001678 irradiating effect Effects 0.000 abstract 2
- 235000003228 Lactuca sativa Nutrition 0.000 abstract 1
- 240000008415 Lactuca sativa Species 0.000 abstract 1
- 244000300264 Spinacia oleracea Species 0.000 abstract 1
- 244000128884 Zier Kohl Species 0.000 abstract 1
- 238000003306 harvesting Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 10
- 235000000318 Bindesalat Nutrition 0.000 description 9
- 244000106835 Bindesalat Species 0.000 description 9
- 240000007124 Brassica oleracea Species 0.000 description 9
- 235000011301 Brassica oleracea var capitata Nutrition 0.000 description 9
- 235000001169 Brassica oleracea var oleracea Nutrition 0.000 description 9
- 241000219315 Spinacia Species 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004060 metabolic process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 2
- 229930003268 Vitamin C Natural products 0.000 description 2
- 238000010835 comparative analysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- 235000019154 vitamin C Nutrition 0.000 description 2
- 239000011718 vitamin C Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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Abstract
The invention provides a method for using an LED light source to lower nitrate content in leaf vegetables. The method includes making an LED irradiating unit by utilizing blue-light, red-light and infrared-light LEDs different in wavelength and photon flux density value according to a lamp number proportion of 5:3:2 (blue light, red light and infrared light); 7-10 days before harvesting of the leaf vegetables like flowering cabbage, lettuce and spinach, using the LED irradiating unit to irradiate places being 50-100cm above plants within a time period from 22:00 to 2:00 for four hours each day for supplementary lighting. By the method, the nitrate content in harvested organs can be lowered in an extremely obvious manner, damage to human body due to the fact that the nitrate content in the leaf vegetables exceeds a safe standard can be prevented, and a novel technique is provided for guaranteeing quality safety of harmless vegetables.
Description
Technical field
The present invention relates to vegetables production technical field, relate in particular to a kind of method that reduces Nitrate with LED light source.
Background technology
Plant is not full wave but selectively to the absorption of light, only have wavelength to can be used for photosynthesis at the light of 400～700nm, be called photosynthetic active radiation, wavelength is less than the ultraviolet light of 400nm and the far-red light of 700～800nm can not directly act on photosynthesis, but can be used as ambient signal coordinate plant growth developmental process and metabolism; Plant can not utilize wavelength to be greater than the light of 800nm, and this part light dissipates mainly with thermal-radiating form.Therefore, for luminous light sources (hereinafter referred to as ordinary light source) of continuous wavelength (300～1500nm or wider wave-length coverage) such as the large high-pressure mercury lamp of energy consumption, Halogen lamp LED, incandescent lamps, plant is low to its utility rate of luminous energy, simultaneously because it belongs to thermal light source, easily cause that environmental temperature raises, can not approach plant and irradiate, be unfavorable for growing and metabolism of accuracy controlling plant.
Summary of the invention
The object of the invention is to solve the defect that above-mentioned prior art exists, provide a kind of utility rate of luminous energy high, can accuracy controlling plant grow and the LED light source that utilizes of metabolism reduces the method for Nitrate.
A method that reduces Nitrate with LED light source, comprises the following steps:
7-10 days before leaf vegetables results, installs an illumination unit according to every square metre of area under cultivation leaf vegetables is irradiated, and irradiate some hours every night, Continuous irradiation 7-10 days;
Described illumination unit is is blue light by blue light, ruddiness, three kinds of LED lamps of infrared light in the number ratio of lamp: ruddiness: infrared light=5: 1 illumination unit that the ratio of 3: 2 is combined into, and in each illumination unit, three kinds of LED lamps are evenly distributed in same plane;
Wherein,
Blue light: wavelength 450 ± 10nm, light quantum flux density 0.78 μ molm
-2s
-1;
Ruddiness: wavelength 630 ± 10nm, light quantum flux density 0.79 μ molm
-2s
-1;
Infrared light: wavelength 735 ± 10nm, light quantum flux density 0.45 μ molm
-2s
-1.
Further, the method that reduces Nitrate with LED light source as above, being distributed as of three kinds of LED lamps on described illumination unit: described blue LED lamp is evenly distributed on the circumference that diameter is 8.5cm-12.5cm; Described red LED lamp is evenly distributed on the circumference that diameter is 4.5cm-6.5cm; Described infrared light is evenly distributed on the circumference that diameter is 2.5cm-3.5cm, and the circumference center of circle at three kinds of LED lamp places overlaps.
Further, the method that reduces Nitrate with LED light source as above, illumination unit irradiates leaf vegetables, and every day, 22:00-2:00 irradiated 4 hours, Continuous irradiation 7-10 days.
Further, the method that reduces Nitrate with LED light source as above, 7-10 days before leaf vegetables results, is arranged on the place high with plant vertical direction 50cm-100cm by described illumination unit.
This technology application blue light, ruddiness, three kinds of LED of infrared light combine illumination unit according to a certain percentage, before the leaf vegetables such as cabbage heart, romaine lettuce, spinach are gathered, within 7-10 days, carry out light filling, can significantly reduce the nitrate content in leaf vegetables results organ.And its effect is better than ordinary light source, greatly reduce energy consumption (power consumption).
Accompanying drawing explanation
Fig. 1 is the distribution map of three kinds of LED lamps on illumination unit of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1-1:
Being distributed as of three kinds of LED lamps on illumination unit: described blue LED lamp is evenly distributed on the circumference that diameter is 8.5cm; Described red LED lamp is evenly distributed on the circumference that diameter is 4.5cm; Described infrared light is evenly distributed on the circumference that diameter is 2.5cm, and the circumference center of circle at three kinds of LED lamp places overlaps;
Blue light: wavelength 450nm, light quantum flux density 0.78 μ molm
-2s
-1;
Ruddiness: wavelength 630nm, light quantum flux density 0.79 μ molm
-2s
-1;
Infrared light: wavelength 735nm, light quantum flux density 0.45 μ molm
-2s
-1;
Before cabbage heart, romaine lettuce, spinach are gathered 10 days, every night, 22:00-2:00 irradiated 4 hours with the LED illumination unit shown in Fig. 1.Every kind of vegetables experiment area 3m
2, each installs 3 illumination units, and the number of the LED lamp that each illumination unit is installed is 5 of blue LED lamps, 3 of red LED lamps, 2, infrared light LED lamp, the irradiation height distance plant top 100cm of illumination unit.
Embodiment 1-2:
By the number of the LED lamp of embodiment 1-1 illumination unit according to blue light: ruddiness: infrared light=5: the ratio of 3: 2 increases by 1 times, and blue LED lamp is 10,6 of red LED lamps, 4, infrared light LED lamp, all the other experimental techniques are identical with embodiment 1-1.
Comparative example 1:
Before cabbage heart, romaine lettuce, spinach are gathered 10 days, every night, 22:00-2:00 irradiated 4 hours with 25W incandescent lamp.Every kind of vegetables experiment area 3m
2, each installs 3 incandescent lamps, irradiates height distance plant top 100cm.
Embodiment 2-1:
Being distributed as of three kinds of LED lamps on illumination unit: described blue LED lamp is evenly distributed on the circumference that diameter is 12.5cm; Described red LED lamp is evenly distributed on the circumference that diameter is 6.5cm; Described infrared light is evenly distributed on the circumference that diameter is 3.5cm, and the circumference center of circle at three kinds of LED lamp places overlaps;
Blue light: wavelength 440nm, light quantum flux density 0.78 μ molm
-2s
-1;
Ruddiness: wavelength 620nm, light quantum flux density 0.79 μ molm
-2s
-1;
Infrared light: wavelength 745nm, light quantum flux density 0.45 μ molm
-2s
-1;
Before cabbage heart, romaine lettuce, spinach are gathered 8 days, every night, 22:00-2:00 irradiated 4 hours with the LED illumination unit shown in Fig. 1.Every kind of vegetables experiment area 3m
2, each installs 3 illumination units, irradiates height distance plant top 80cm.
Embodiment 2-2:
By the number of the LED lamp of embodiment 2-1 illumination unit according to blue light: ruddiness: infrared light=5: the ratio of 3: 2 increases by 1 times, and blue LED lamp is 10,6 of red LED lamps, 4, infrared light LED lamp, all the other experimental techniques are identical with embodiment 2-1.
Comparative example 2:
Before cabbage heart, romaine lettuce, spinach are gathered 8 days, every night, 22:00-2:00 irradiated 4 hours with 25W incandescent lamp.Every kind of vegetables experiment area 3m
2, each installs 3 incandescent lamps, irradiates height distance plant top 80cm.
Embodiment 3-1:
Being distributed as of three kinds of LED lamps on illumination unit: described blue LED lamp is evenly distributed on the circumference that diameter is 10.5cm; Described red LED lamp is evenly distributed on the circumference that diameter is 5.5cm; Described infrared light is evenly distributed on the circumference that diameter is 3.0cm, and the circumference center of circle at three kinds of LED lamp places overlaps;
Blue light: wavelength 460nm, light quantum flux density 0.78 μ molm
-2s
-1;
Ruddiness: wavelength 640nm, light quantum flux density 0.79 μ molm
-2s
-1;
Infrared light: wavelength 725nm, light quantum flux density 0.45 μ molm
-2s
-1;
Before cabbage heart, romaine lettuce, spinach are gathered 7 days, every night, 22:00-2:00 irradiated 4 hours with the LED illumination unit shown in Fig. 1.Every kind of vegetables experiment area 3m
2, each installs 3 illumination units, irradiates height distance plant top 50cm.
Embodiment 3-2:
By the number of the LED lamp of embodiment 3-1 illumination unit according to blue light: ruddiness: infrared light=5: the ratio of 3: 2 increases by 1 times, and blue LED lamp is 10,6 of red LED lamps, 4, infrared light LED lamp, all the other experimental techniques are identical with embodiment 3-1.
Comparative example 3:
Before cabbage heart, romaine lettuce, spinach are gathered 7 days, every night, 22:00-2:00 irradiated 4 hours with 25W incandescent lamp.Every kind of vegetables experiment area 3m
2, each installs 3 incandescent lamps, irradiates height distance plant top 50cm.
Comparative example 4:
Cabbage heart, romaine lettuce, spinach are cultivated with above embodiment and comparative example respectively the same period, manually do not irradiate light filling, every kind of vegetables experiment area 3m
2.
The data of above embodiment and comparative example are analyzed, as following table:
The nitrate content comparative analysis of table 1 embodiment and comparative example
The plant height of table 2 embodiment and comparative example, single-strain fresh weight and quality comparative analysis
Above experimental result shows, adopt the inventive method irradiation vegetables extremely remarkable to the nitrate content effect of the vegetables such as reduction cabbage heart, romaine lettuce and spinach, ratio is the reduction 30.2-42.5% of light filling not, than irradiate the reduction 21.0-33.0% (table 1) of same time with incandescent lamp.In addition with comparing of light filling not, can also promote plant height growth and there is certain production-increasing function, increasing soluble sugar, vitamin C and the chlorophyllous content of blade, improving quality (table 2).
Adopt the inventive method can extremely significantly reduce the nitrate content in vegetables results organ.Be conducive to prevent that in leaf vegetables, nitrate content exceeds safety standard and causes the harm to human body, for guaranteeing that pollution-free vegetable quality safety provides new technology.In addition with comparing of light filling not, can also promote plant height growth and there is certain production-increasing function, also can increase blade soluble sugar, vitamin C and chlorophyllous content, improving quality.Compare with using ordinary light source, use LED light source can greatly reduce energy consumption (power consumption).
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. with LED light source, reduce a method for Nitrate, it is characterized in that, comprise the following steps:
7-10 days before leaf vegetables results, installs an illumination unit according to every square metre of area under cultivation leaf vegetables is irradiated, and irradiate some hours every night, Continuous irradiation 7-10 days;
Described illumination unit is is blue light by blue light, ruddiness, three kinds of LED lamps of infrared light in the number ratio of lamp: ruddiness: infrared light=5: 1 illumination unit that the ratio of 3: 2 is combined into, and in each illumination unit, three kinds of LED lamps are evenly distributed in same plane;
Wherein,
Blue light: wavelength 450 ± 10nm, light quantum flux density 0.78 μ molm
-2s
-1;
Ruddiness: wavelength 630 ± 10nm, light quantum flux density 0.79 μ molm
-2s
-1;
Infrared light: wavelength 735 ± 10nm, light quantum flux density 0.45 μ molm
-2s
-1.
2. the method that reduces Nitrate with LED light source according to claim 1, is characterized in that, being distributed as of three kinds of LED lamps on described illumination unit: described blue LED lamp is evenly distributed on the circumference that diameter is 8.5cm-12.5cm; Described red LED lamp is evenly distributed on the circumference that diameter is 4.5cm-6.5cm; Described infrared light is evenly distributed on the circumference that diameter is 2.5cm-3.5cm, and the circumference center of circle at three kinds of LED lamp places overlaps.
3. the method that reduces Nitrate with LED light source according to claim 1 and 2, is characterized in that, illumination unit irradiates leaf vegetables, and every day, 22:00-2:00 irradiated 4 hours, Continuous irradiation 7-10 days.
4. a kind of method that reduces Nitrate with LED light source according to claim 3, is characterized in that, 7-10 days before leaf vegetables results, is arranged on the place high with plant vertical direction 50cm-100cm by described illumination unit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105815197A (en) * | 2016-04-29 | 2016-08-03 | 华南农业大学 | Method for improving quality of hydroponic vegetables by use of blue light LED for supplementing light |
| CN106258871A (en) * | 2016-07-25 | 2017-01-04 | 北海市蔬菜研究所 | The ciltivating process of Caulis et Folium Lactucae Sativae |
| CN109197219A (en) * | 2018-09-21 | 2019-01-15 | 广东绿爱生物科技股份有限公司 | A kind of method for growing vegetables and LED light source |
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| CN109197219A (en) * | 2018-09-21 | 2019-01-15 | 广东绿爱生物科技股份有限公司 | A kind of method for growing vegetables and LED light source |
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