CN106105811A - A kind of Radix Dauci Sativae breeding method in semi-enclosed artificial light type plant factor - Google Patents

Abstract

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory, belonging to the technical field of facility agriculture. The present invention starts from the germination of carrot seeds, and is divided into four growth stages according to the growth process of carrots: germination stage, seedling stage, vigorous leaf growth stage, and vigorous growth stage of fleshy roots; the four stages adopt different light conditions to promote the growth of carrots; Illumination conditions include: the number of emission peaks of the light source spectrum, the wavelength of the emission peak position, the half-maximum width, the relative height, the light intensity, and the daily light time. Through the cultivation method of the present invention, the content of active ingredients such as carotenoids, polysaccharides, and sulforaphane in carrots is increased, the growth cycle is greatly shortened, and the influence of seasons and climates on carrot cultivation is solved at the same time, and a kind of carrot cultivation method is provided. The large-scale breeding method is of great significance for the rapid production of carrots.

Description

A kind of cultivation method of carrot in semi-enclosed artificial light type plant factory

technical field

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory, belonging to the technical field of facility agriculture.

Background technique

The plant factory is a high-efficiency agricultural system that realizes the continuous production of crops or other plants through high-precision control in the environment. The artificial light type refers to the use of artificially prepared light sources instead of sunlight to provide energy sources for plants. Among them, LED artificial light sources have light quality. The advantages of controllable light intensity and photoperiod are widely used in agricultural lighting. Among various environmental factors, light has a huge impact on the growth of plants and the accumulation of functional chemicals. With the development of agricultural lighting, LED plant supplementary light, as a light source with adjustable spectrum, is widely used in plant supplementary light. . In the early stage of research on the impact of LEDs on plants, they were used to study plant morphology. Later, it was found that LED lights with different light qualities also had a huge impact on the active ingredients of plants.

Studies by Lin Kui and others have shown that the concentration of chlorophyll per unit area will increase with the increase of the proportion of blue light when carrots are treated with different proportions of blue light LEDs, but there is no research on the physical and chemical effects of carrot growth stages and light (Lin Kui, Xu Yong et al., Effects of LED lighting on the accumulation of functional chemical substances in plants [J], Acta Botanica Sinica, 2015, 50(2): 263-271) However, in artificial light plant factories, there is no detailed report on carrot cultivation. Carrots are rich in carotenoids, polysaccharides, sulforaphane and other active ingredients, among which the most representative functional ingredient is β-carotene, which plays a positive role in the immune regulation of the human body. It has been shown that β-carotene can combine with free radicals to delay the aging of the body, and is an important plant active ingredient. Chinese patent CN201110145296.2 discloses a method for promoting plant growth by using LED light sources, and concludes that blue light with a wavelength of 400-500nm and red light with a wavelength of 610-720nm can promote plant growth, but does not take light quality and light intensity into account And synergy with environmental factors, and what type of spectrum is required for each stage of the plant has not been resolved.

Based on the above reasons, carrots can be used as an edible vegetable or as a functional substance extract, which has great research and cultivation value. Rapid cultivation of carrots in artificial light plant factories and research on different light qualities are effective for carrot accumulation. The role of functional ingredients is significant

Contents of the invention

The purpose of the present invention is to provide an LED lamp with controllable lighting conditions as a light source, and an artificial light-type plant factory cultivation method with controllable environmental factors, so as to quickly cultivate carrot plants with good physiological properties and high functional component content, and can not A new breeding method influenced by season and climate.

In the present invention, the LED plant supplementary light used is a phosphor-excited LED lamp with an adjustable spectrum. It has the advantages of light quality, light intensity, and adjustable photoperiod. It is aimed at different stages in the vegetative growth period of carrots. Light supplementation is used to achieve the purpose of cultivating carrot plants with good physiological properties and high content of functional components, so as to improve the value of artificially cultivated carrots.

A method for cultivating carrots in a semi-enclosed artificial light plant factory of the present invention starts from the germination of carrot seeds, and is divided into four growth stages according to the growth process of carrots: germination stage, seedling stage, leaf growth period, and fleshy root growth stage. stage; the four stages adopt different light conditions to promote the growth of carrots; the light conditions include: the number of emission peaks of the light source spectrum, the wavelength of the position of the emission peak, the full width at half maximum, the relative height, the light intensity, and the light time per day.

A method for cultivating carrots in a semi-enclosed artificial light plant factory according to the present invention, the four growth stages of the carrot growth process are divided into:

germination period

During the germination period, the seeds germinate until the cotyledons unfold and the first true leaf appears. Generally, the period is 5-7 days;

seedling stage

From the time when the first true leaf grows, until the fleshy root breaks or 5-6 true leaves appear. Generally 23-28 days, preferably 25 days.

vigorous leaf growth

From the beginning of breaking the belly until the plant grows 12 true leaves. Generally 28-32 days, preferably 30 days.

period of vigorous growth of fleshy roots

From 12 true leaves until harvested. Generally 40-50 days.

The cultivation method of a kind of carrot of the present invention in the semi-enclosed artificial light type plant factory, the illumination parameters of each stage are respectively:

The spectrum of the light source used in the germination period contains two emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.1-0.2, and the half-maximum width is 15-20nm; the second emission peak is located at 640-670nm, the relative height is 0.3 -0.4, FWHM 20-30nm; Light intensity: 10-20μmol/m ² /s; Daily light time: 1.5-2.5h;

The spectrum of the light source used in the seedling stage contains two emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.4-0.6, and the half-maximum width is 20-30nm; the second emission peak is located at 650-680nm, the relative Height 0.9-1.0, FWHM 30-40nm; Light intensity: 90-110μmol/m ² /s; Daily light time: 9-11h;

The spectrum of the light source used in the vigorous leaf growth period contains three emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.7-0.9, and the half-maximum width is 25-35nm; the second emission peak is located at 590-650nm. Relative height 0.5-0.7, FWHM 15-20nm; the third emission peak is located at 640-670nm, relative height 0.8-1.0, FWHM 30-40nm; light intensity: 190-210μmol/m ² /s; per day Lighting time: 11-13 hours, preferably 12 hours;

The spectrum of the light source used in the vigorous growth period of fleshy roots contains three emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.3-0.5, and the half-maximum width is 25-35nm; the second emission peak is located at 590-650nm , the relative height is 0.2-0.4, the FWHM is 20-30nm; the third emission peak is located at 640-670nm, the relative height is 0.2-0.4, the FWHM is 20-25nm; light intensity: 220-240μmol/m ² /s; Daily light time: 11-13h.

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory. The light sources used in each stage of the carrot growth process are LED plant growth lamps with adjustable spectrum.

A method for cultivating carrots in a semi-enclosed artificial light plant factory according to the present invention, the ambient temperature of each stage of carrot growth is:

The temperature requirements during the germination period are: 20°C-25°C during the light period, and 15°C-20°C during the dark period;

The temperature requirements in the seedling stage are: 23°C-25°C during the light period and 5°C-18°C during the dark period;

The temperature requirements during the leaf growth period are: 20°C-25°C during the light period and 3°C-18°C during the dark period;

The temperature requirements for the vigorous growth period of fleshy roots are: 0°C-22°C during the light period, and 12-16°C during the dark period.

The cultivation method of a kind of carrot of the present invention in semi-enclosed type artificial light type plant factory, the environmental humidity of each stage of carrot growth is:

The humidity of the air is controlled at 80%-90% during the germination stage, seedling stage, and vigorous leaf growth stage;

During the vigorous growth period of fleshy roots, the humidity of the air should be controlled at 75%-85%.

A method for cultivating carrots in a semi-enclosed artificial light plant factory according to the present invention, the moisture content of the matrix at each stage of carrot growth is:

The moisture content of the substrate during germination is 16%-18%;

The water content of the substrate at the seedling stage is 18%-22%;

The moisture content of the matrix during the vigorous leaf growth period is 18%-22%;

The water content of the substrate during the vigorous growth period of fleshy roots is 17%-20%.

A kind of carrot cultivation method of the present invention in semi-enclosed artificial light type plant factory, the fertilization system of each stage of carrot growth is:

The fertilizer applied during the germination period is the circle fertilizer that has been stacked and decomposed, and the number of fertilization is 1 time;

The fertilizer applied at the seedling stage is organic nitrogen fertilizer and inorganic nitrogen fertilizer; the mass ratio of the organic nitrogen fertilizer: inorganic nitrogen fertilizer is 0.8-1.2:0.8-1.2; the seedling stage is fertilized once every 10-12 days;

The fertilizer applied during the vigorous growth period of the leaves is a compound fertilizer, and the mass ratio of nitrogen, phosphorus, and potassium in the compound fertilizer is 8-15: 5-8: 13-18; the fertilizer is applied once every 9-11 days during the vigorous growth period of the leaves;

The fertilizer applied in the vigorous growth period of the fleshy root is a water-soluble compound fertilizer, and the mass ratio of nitrogen, phosphorus and potassium in the water-soluble compound fertilizer is 8-12:5-9:12-17.

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory, in which ring fertilizers, compound fertilizers and water-soluble compound fertilizers are applied to the roots of carrot plants, and organic nitrogen fertilizers and inorganic nitrogen fertilizers are applied to leaf surfaces.

The invention relates to a method for cultivating carrots in a semi-closed artificial light plant factory. The pH value of the matrix used for cultivating carrots is controlled at 5.5-7.

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory. The semi-enclosed artificial light plant factory is equipped with ventilation equipment. Turn on the exhaust fan, increase the air convection velocity, lower the ambient temperature, and supplement CO ₂ .

The invention relates to a method for cultivating carrots in a semi-enclosed artificial light plant factory, wherein the light source in the semi-enclosed artificial light plant factory is an LED plant growth lamp with an adjustable spectrum. The LED plant growth lamp with adjustable spectrum is phosphor powder plus chip type, that is, phosphor powder excited LED lamp.

The present invention provides different spectral conditions and environmental factors for four different stages of carrot growth and germination stage, seedling stage, vigorous leaf growth stage, and vigorous growth stage of fleshy root, so as to make carrots grow rapidly and strengthen the accumulation of active ingredients. ,in:

Germination period: During the germination period, carrots have high requirements for environmental factors other than light conditions, and generally germinate slowly. It is necessary to ensure that the substrate is well ventilated and the water content is 16%-18%, and the temperature is controlled at 20°C-25°C. The light time is 2h/day, and the red light with emission peak at 640-680nm is set to promote the differentiation of carrot seeds, so as to achieve the purpose of rapid germination of carrot seeds.

Seedling stage: In view of the slow growth of carrot seedling stage, small root growth, small leaf area, and weak root absorption capacity, ensure that the water content of the substrate is 18%-22%, the temperature is controlled at 23°C-25°C, and the light 10h/day, set emission at 440-480nm, relative height: 0.4-0.6, half maximum width 20-30nm and emission peak at 650-680nm, relative height 0.9-1.0, half maximum width 30-40nm spectral conditions, It can promote the growth of carrot seedling leaves and the synthesis of chlorophyll, increase the accumulation of organic matter, and accelerate the growth of seedlings into the next growth stage.

Leaf growth period: At this time, the carrot grows fast, the leaf area is expanded, photosynthesis is enhanced, the accumulation of nutrients and functional components increases, and the fleshy root begins to grow slowly. According to the growth characteristics of carrots in this period, the water content of the substrate is adjusted to 18%. -22%, the temperature is controlled at 20°C-25°C, the light is 12h/day, the emission peak is set at 440-480nm, the relative height is 0.7-0.9, the full width at half maximum is 25-35nm, and the emission peak is at 590-650nm. Height 0.5-0.7, FWHM 15-20nm, emission peak at 640-670nm, relative height 0.8-1.0, FWHM 30-40nm spectral conditions, under the premise of ensuring that the plant has reached the light saturation point, use 590 -650nm light relatively inhibits the growth of leaves, and achieves the purpose of promoting the growth of roots and the accumulation of organic matter.

Vigorous growth period of fleshy roots: During this period, the aboveground part (leaf) of carrot grows slowly or stops growing, and the underground part begins to grow rapidly, and the accumulation of organic matter and functional components accelerates. At this time, adjust the water content of the matrix at 17%-20%, control the temperature at 20°C-22°C, and control the temperature at 8°C-16°C under dark conditions, which is conducive to the accumulation of organic matter, light 12h/day, set the spectrum The emission peak is at 440-480nm, the relative height is 0.3-0.5, the full width at half maximum is 25-35nm, the emission peak is at 590-650nm, the relative height is 0.2-0.4, the full width at half maximum is 20-30nm, and the emission peak is at 640-670nm At this time, the relative height is 0.2-0.4 and the spectral condition is 20-25nm. The spectral condition in this period can maximize the leaf area, prevent premature senescence of leaves, allow nutrients to be transported to fleshy roots, and increase carotenoids in fleshy roots. , polysaccharides and other functional ingredients.

At each stage of cultivation, fertilizers with different properties and functions need to be applied in different ways and times. Fertilization at the germination stage is high-quality lap fertilizer that has been piled up and decomposed, and fertilization is applied once throughout the seedling stage; organic nitrogen fertilizer and inorganic nitrogen fertilizer are applied at the seedling stage. Organic nitrogen fertilizer: The ratio of inorganic nitrogen fertilizer is 1:1, once every 10-12 days; the mass ratio of nitrogen, phosphorus, and potassium is 8-15:5-8:13-18, and the compound fertilizer is fertilized every 10 days or so; Water-soluble compound fertilizer is applied during the vigorous growth period of fleshy roots, wherein the mass ratio of each element is nitrogen: phosphorus: potassium=8-12: 5-9: 12-17; the above-mentioned compound fertilizer is applied to the roots of carrot plants, and organic and inorganic nitrogen fertilizers are applied to Carrot plant foliage.

For the entire cultivation process, each factor in the environmental factors needs to be regulated in real time. When cultivating carrots, ensure that the air humidity in the environment is 80%-90% in the germination stage, seedling stage and leaf growth stage, and the air humidity in the vigorous growth stage of fleshy roots is 80%-90%. Control it at 75%-85%. When the air humidity and temperature in the environment are too high or too low, it is necessary to take corresponding countermeasures, such as humidification, warming, ventilation, etc.

In a word, the present invention realizes the rapid growth of carrots in a plant factory and obtains plants with high content of active ingredients through synergistic effects of light intensity (PPFD), spectral composition, light cycle, temperature, humidity, and fertilization conditions at each stage.

Description of drawings:

Accompanying drawing 1 is embodiment of the present invention 1 and natural condition cultivation carrot fleshy root control figure;

In Fig. 1, No. 1 is an individual photo of carrots cultivated under natural conditions, and No. 2 is an individual photo of carrots cultivated in Example 1 of the present invention. Seen from Fig. 1, the individuality of the carrot cultivated by the present invention is far greater than the individuality of the carrot cultivated under natural conditions; in conjunction with Table 2, there is also a large difference in the functional substance content of the two.

detailed description

Example 1

Select 100 carrot seeds of the "Daban Sanhong Qicun Ginseng" model on the market for contrast cultivation, and the seeds are divided into two groups on average, and one group (in a semi-enclosed artificial light plant factory) is equipped with spectral conditions (see Table 1), the other group was cultivated under the same natural light conditions except that the spectrum was different, and the environmental factors were set. The carrot seeds cultivated in the cultivation mode of the present invention are obviously better than the natural light condition group (see Table 2) in each growth stage growth rate and functional substance content:

Example 1

The temperature requirements during the germination period are: 25°C during the light period and 15°C during the dark period; the germination period is 5 days;

The temperature requirements for the seedling stage are: 23°C during the light period and 12°C during the dark period; the seedling stage is 20 days;

The temperature requirements for the vigorous leaf growth period are: 25°C during the light period and 12°C during the dark period; the vigorous leaf growth period is 25 days;

The temperature requirements for the vigorous growth period of fleshy roots are: 10°C during the light period and 14°C during the dark period. The period of vigorous growth of fleshy roots was 45 days.

The humidity of the air is controlled at 85% in the germination stage, seedling stage, and vigorous leaf growth stage;

During the vigorous growth period of fleshy roots, the humidity of the controlled air is 80%.

The moisture content of the substrate at each stage of carrot growth is:

The moisture content of the substrate during germination is 16%-18%;

The water content of the substrate at the seedling stage is 18%-22%;

The moisture content of the matrix during the vigorous leaf growth period is 18%-22%;

The water content of the substrate during the vigorous growth period of fleshy roots is 17%-20%.

The fertilizer applied during the germination period is the circle fertilizer that has been stacked and decomposed, and the number of fertilization is 1 time;

The fertilizer applied at the seedling stage is organic nitrogen fertilizer and inorganic nitrogen fertilizer; the mass ratio of the organic nitrogen fertilizer: inorganic nitrogen fertilizer is 1:1; the seedling stage is fertilized once every 10-12 days;

The fertilizer applied during the period of vigorous blade growth is compound fertilizer, and the mass ratio of nitrogen, phosphorus and potassium in the compound fertilizer is 8:5:13; during the period of vigorous blade growth, fertilize once every 10 days;

The fertilizer applied during the vigorous growth period of the fleshy roots is a water-soluble compound fertilizer, and the mass ratio of nitrogen, phosphorus and potassium in the water-soluble compound fertilizer is 12:9:17.

Among them, ring fertilizer, compound fertilizer and water-soluble compound fertilizer are applied to the roots of carrot plants, and organic nitrogen fertilizer and inorganic nitrogen fertilizer are applied to the leaves.

The pH value of the substrate used for cultivating carrots is controlled at 5.5-7.

The semi-enclosed artificial light plant factory is equipped with ventilation equipment, and when the air temperature is ≥ 30°C, or the substrate temperature is ≥ 26°C, the exhaust fan is automatically turned on to increase the air convection velocity, reduce the ambient temperature, and supplement CO ₂ .

Table 1 Spectral conditions

in

The data of the peak relative height corresponds to each emission peak in sequence;

The data of full width at half maximum corresponds to each emission peak in sequence;

The obtained samples are shown in the No. 2 mark in Fig. 1, and the growth speed and functional substance content of the plants in each stage are shown in Table 2.

control group

Other conditions are uniform and consistent with Example 1; the difference is the use of natural light and the time of light; the picture of the obtained sample is shown as No. 1 in Figure 1; the growth rate and functional substance content of each stage of the plant are shown in Table 2;

Table 2 Comparison of growth rate and functional substance content at each stage between the cultivation method of the present invention and the natural cultivation method

*The control group is natural light intensity (μmol/m ² /s):

8 am: 146 12 noon: 216 6 pm: 108

The entire duration of the control group was 120 days.

As can be seen from Table 2 and Fig. 1, the carrot plants cultivated by the method of the present invention are larger than the carrot plants cultivated in a common way, have high functional component content, short whole growth cycle, and are not affected by seasons, climate and pests. This also proves that the cultivation method of the present invention can effectively improve the production efficiency and value of carrots in artificial light plant factories, and can be extended to other vegetables or high value-added plants.

Claims (10)

1. A method for cultivating carrots in a semi-enclosed artificial light plant factory, characterized in that: from the carrot seed germination, the growth process of carrots is divided into germination period, seedling period, vigorous growth period of leaves, and vigorous growth of fleshy roots four stages of growth; the four stages adopt different light conditions to promote the growth of carrots; the light conditions include: the number of emission peaks of the light source spectrum, the wavelength of the emission peak position, half-width, relative height, light intensity, and daily light time. 2. the cultivation method of a kind of carrot according to claim 1 in the semi-enclosed artificial light type plant factory, it is characterized in that the four growth stages of carrot growth process are divided into: germination period During the germination period, the seeds germinate until the cotyledons unfold and the first true leaf appears; seedling stage From the time when the first true leaf grows, until the fleshy root breaks or 5-6 true leaves appear; vigorous leaf growth From the beginning of breaking the belly until the plant grows 12 true leaves; period of vigorous growth of fleshy roots From 12 true leaves until harvested. 3. the cultivation method of a kind of carrot according to claim 1 in the semi-enclosed artificial light type plant factory, it is characterized in that: the illumination parameters of each stage are respectively: The spectrum of the light source used in the germination period contains two emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.1-0.2, and the half-maximum width is 15-20nm; the second emission peak is located at 640-670nm, the relative height is 0.3 -0.4, FWHM 20-30nm; Light intensity: 10-20μmol/m ² /s; Daily light time: 1.5-2.5h; The spectrum of the light source used in the seedling stage contains two emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.4-0.6, and the half-maximum width is 20-30nm; the second emission peak is located at 650-680nm, the relative Height 0.9-1.0, FWHM 30-40nm; Light intensity: 90-110μmol/m ² /s; Daily light time: 9-11h; The spectrum of the light source used in the vigorous leaf growth period contains three emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.7-0.9, and the half-maximum width is 25-35nm; the second emission peak is located at 590-650nm. Relative height 0.5-0.7, FWHM 15-20nm; the third emission peak is located at 640-670nm, relative height 0.8-1.0, FWHM 30-40nm; light intensity: 190-210μmol/m ² /s; per day Lighting time: 11-13h; The spectrum of the light source used in the vigorous growth period of fleshy roots contains three emission peaks, the first emission peak is located at 440-480nm, the relative height is 0.3-0.5, and the half-maximum width is 25-35nm; the second emission peak is located at 590-650nm , the relative height is 0.2-0.4, the FWHM is 20-30nm; the third emission peak is located at 640-670nm, the relative height is 0.2-0.4, the FWHM is 20-25nm; light intensity: 220-240μmol/m ² /s; Daily light time: 11-13h. 4. A method for cultivating carrots in a semi-enclosed artificial light plant factory according to claim 1, characterized in that: the light sources used in each stage of the carrot growth process are LED plant growth lights with adjustable spectra. 5. the cultivation method of a kind of carrot according to claim 1 in the semi-enclosed artificial light type plant factory, it is characterized in that the ambient temperature of each stage of carrot growth is: The temperature requirements during the germination period are: 20°C-25°C during the light period, and 15°C-20°C during the dark period; The temperature requirements in the seedling stage are: 23°C-25°C during the light period and 5°C-18°C during the dark period; The temperature requirements for vigorous leaf growth period are: 20°C-25°C during the light period, 3°C-18°C during the dark period; the temperature requirements for the vigorous root growth period are: 0°C-22°C during the light period, and 12-16°C during the dark period. 6. The cultivation method of a kind of carrot according to claim 1 in a semi-enclosed artificial light type plant factory, characterized in that: the ambient humidity of each stage of carrot growth is: The humidity of the air is controlled at 80%-90% during the germination stage, seedling stage, and vigorous leaf growth stage; During the vigorous growth period of fleshy roots, the humidity of the air should be controlled at 75%-85%. 7. The cultivation method of a kind of carrot according to claim 1 in a semi-enclosed artificial light type plant factory, characterized in that: the water content of the matrix at each stage of carrot growth is: The moisture content of the substrate during germination is 16%-18%; The water content of the substrate at the seedling stage is 18%-22%; The moisture content of the matrix during the vigorous leaf growth period is 18%-22%; The water content of the substrate during the vigorous growth period of fleshy roots is 17%-20%. 8. The cultivation method of a kind of carrot according to claim 1 in a semi-enclosed artificial light type plant factory, wherein the fertilization system at each stage of carrot growth is: The fertilizer applied during the germination period is the circle fertilizer that has been stacked and decomposed, and the number of fertilization is 1 time; The fertilizer applied at the seedling stage is organic nitrogen fertilizer and inorganic nitrogen fertilizer; the mass ratio of the organic nitrogen fertilizer: inorganic nitrogen fertilizer is 0.8-1.2:0.8-1.2; the seedling stage is fertilized once every 10-12 days; The fertilizer applied during the vigorous growth period of the leaves is a compound fertilizer, and the mass ratio of nitrogen, phosphorus, and potassium in the compound fertilizer is 8-15: 5-8: 13-18; the fertilizer is applied once every 9-11 days during the vigorous growth period of the leaves; The fertilizer applied in the vigorous growth period of the fleshy root is a water-soluble compound fertilizer, and the mass ratio of nitrogen, phosphorus and potassium in the water-soluble compound fertilizer is 8-12:5-9:12-17. 9. The cultivation method of a kind of carrot according to claim 1 in a semi-enclosed artificial light type plant factory, characterized in that: ring fertilizer, compound fertilizer, and water-soluble compound fertilizer are applied to plant carrot roots, organic nitrogen fertilizer and inorganic nitrogen fertilizer Apply to leaves. 10. A method for cultivating carrots in a semi-enclosed artificial light plant factory according to claim 1, characterized in that: the pH value of the substrate used for cultivating carrots is controlled at 5.5-7.