Method for managing tea trees with high EGCG content in photovoltaic tea garden

Abstract

The invention provides a management method for tea trees with high EGCG content in a photovoltaic tea garden. The management method comprises the following steps: performing illumination management on the tea trees in the photovoltaic tea garden; the illumination management comprises the following steps: starting a mixed light source to carry out light supplementing treatment on the tea trees in a preset light supplementing period of a natural day when the ambient light intensity is not greater than a preset light intensity value; the mixed light source comprises a first light source, a second light source and a third light source, the first light source comprises a red light source, the second light source comprises a blue light source, and the third light source comprises a white light source. Intelligent planting management can be conducted on the photovoltaic tea garden, comprehensive regulation and control over the tea tree growth environment are achieved, and the EGCG content in tea leaves is increased.

Description

Technical Field

[0001] The invention belongs to the field of agriculture, and in particular relates to a management method for tea trees with high EGCG content in a photovoltaic tea garden. Background Art

[0002] Solar energy is an inexhaustible clean energy with great growth potential. Photovoltaic power generation is a power generation technology that uses photovoltaic modules to convert solar energy into electrical energy. Due to its clean and efficient characteristics, it has been widely studied and rapidly developed worldwide. Photovoltaic agriculture is a modern comprehensive agricultural production system that integrates agricultural economic development, ecological environmental protection, and efficient resource utilization, achieving multiple uses of one land and win-win results for all parties. Therefore, the development of photovoltaic tea gardens will combine the utilization of solar energy resources with the development of the tea industry, which is of far-reaching significance.

[0003] The development of modern agriculture still requires efficient use of energy and technological innovation. In the face of the increasing scarcity of energy today, the development of photovoltaic tea gardens can make major breakthroughs in the rational development of renewable energy and the improvement of the tea garden environment. The application of photovoltaic tea gardens can effectively adjust the light environment for the growth of tea trees, and use photovoltaic energy to realize a new model of integrated water and fertilizer planting in tea gardens, providing a variety of solutions for smart tea gardens, green energy tea gardens, and low-carbon tea gardens. Photovoltaic tea gardens, as a new way of comprehensive land utilization, are the product of the close combination of traditional agriculture and clean energy. They do not change the attributes of the land, overcome the shortcomings of scarce land resources, and the slow development of ground photovoltaic power stations. Combining photovoltaic power generation with tea planting is not only conducive to the protection of the ecological environment and the alleviation of land use conflicts, but also can generate clean electricity, expand the proportion of renewable energy in power supply, and achieve two-way benefits. It can not only save energy and protect the environment, but also promote a new transformation model of photovoltaic facilities, and can also achieve efficient use of light and land resources.

[0004] Catechins are an important active ingredient in tea leaves, with a variety of biological activities, such as anti-oxidation, anti-inflammatory, and anti-cancer. EGCG (epigallocatechin gallate) is an important monomer in catechins, with very strong antioxidant activity, which is at least 100 times that of vitamin C and 25 times that of vitamin E. EGCG exerts a powerful antioxidant effect by scavenging free radicals, metal chelation, inhibiting cell signal transduction pathways, and participating in oxidation and antioxidant enzyme systems; it can inhibit the activity of certain cancer promoters and has a significant inhibitory effect on the proliferation of cancer cells. EGCG can also induce apoptosis of cancer cells and has a certain preventive effect on various cancers such as gastric cancer, lung cancer, breast cancer, intestinal cancer, liver cancer, skin cancer, etc.; EGCG can hinder the production of enzymes that destroy cartilage and help prevent osteoarthritis. Laboratory tests have shown that EGCG has the effect of protecting cartilage, not only reducing the loss of cartilage, but also reducing joint swelling and pain; anti-allergic effect EGCG can block cell receptors to produce allergic reactions, so it can be used to resist allergic and cold symptoms such as runny nose, cough, and watery eyes; EGCG is good for heart health and can lower blood pressure, cholesterol and platelets in blood vessels; EGCG can also inhibit Cu 2+ Induced oxidation of low-density lipoprotein (LDL) and increased its antioxidant effect. Therefore, increasing the catechin content in tea has always been the focus of tea farmers and scientific researchers.

[0005] In view of this, it is necessary to provide a management method for tea trees with high EGCG content in photovoltaic tea gardens to solve or at least alleviate the technical problem of how to increase the EGCG content of tea trees based on photovoltaic tea gardens. Summary of the invention

[0006] The main purpose of the present invention is to provide a management method for tea trees with high EGCG content in a photovoltaic tea garden, aiming to solve the above-mentioned technical problem of how to increase the EGCG content of tea trees based on a photovoltaic tea garden.

[0007] To achieve the above object, the present invention provides a method for managing tea trees with high EGCG content in a photovoltaic tea garden, comprising: performing light management on tea trees in the photovoltaic tea garden;

[0008] The lighting management includes: during a preset supplementary lighting period of a natural day, when the ambient light intensity is not greater than a preset light intensity value, starting a mixed light source to perform supplementary lighting treatment on the tea trees; the mixed light source includes a first light source, a second light source and a third light source, the first light source includes a red light source, the second light source includes a blue light source, and the third light source includes a white light source.

[0009] Furthermore, a light intensity ratio of the first light source, the second light source and the third light source is 1-2:2-3:5-7.

[0010] Furthermore, the total light intensity of the mixed light source is 5.0 to 30.0 μmol·m -2 ·s -1 .

[0011] Furthermore, the duration of the preset fill light period is no more than 16 hours; the preset fill light period is selected within the range of 6 am to 10 pm.

[0012] Furthermore, the preset light intensity value is 200±20 μmol·m -2 ·s -1 .

[0013] Furthermore, the wavelength of the blue light is 440-460 nm; the wavelength of the red light is 650-670 nm.

[0014] Furthermore, the management method also includes water and fertilizer management;

[0015] The water and fertilizer management includes: applying base fertilizer and topdressing fertilizer to the photovoltaic tea garden; the base fertilizer includes organic fertilizer, the topdressing fertilizer includes inorganic fertilizer, and the topdressing fertilizer is combined with water irrigation.

[0016] Furthermore, the inorganic fertilizer includes nitrogen fertilizer.

[0017] Furthermore, the water and fertilizer management further includes: monitoring the soil environment of the photovoltaic tea garden, and when the soil environment of the photovoltaic tea garden reaches a preset drought standard, the ratio of the topdressing to the water in the water irrigation is a first ratio;

[0018] When the soil environment of the photovoltaic tea garden is between the preset drought standard and the preset moisture damage standard, the ratio of the topdressing to the water in the water irrigation is the second ratio;

[0019] When the soil environment of the photovoltaic tea garden reaches the preset moisture damage standard, the photovoltaic tea garden is drained, and the ratio of the second topdressing to the water in the water irrigation is a third ratio, and the topdressing is applied in the form of foliar fertilizer;

[0020] The first ratio is smaller than the second ratio, and the second ratio is smaller than the third ratio.

[0021] Furthermore, the management method also includes pruning management; the pruning management includes: pruning the tea trees during the growing period and pruning the tea trees during the dormant period.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] The present invention is based on the photovoltaic tea garden to increase the EGCG content of tea trees; the present invention performs mixed supplementary lighting in the photovoltaic tea garden, and the EGCG content is not only higher than that of the photovoltaic tea garden without supplementary lighting, but also higher than that of the tea garden without photovoltaic panels installed, and higher than that of the tea garden without photovoltaic panels installed but with mixed supplementary lighting. In the present invention, the application of the photovoltaic tea garden can effectively adjust the light environment for the growth of tea trees, formulate corresponding supplementary lighting strategies for the tea trees in the photovoltaic tea garden, and can increase the EGCG content of the tea trees based on the installation of photovoltaic panels; the present invention provides supplementary lighting when the tea trees need light and the external light conditions are insufficient, and the targeted light source provided by the present invention can obtain tea products with high EGCG content, providing raw materials for large-scale utilization of EGCG.

[0024] In addition, photovoltaic tea garden, as a new way of comprehensive land utilization, is the product of the close integration of traditional agriculture and clean energy. The project does not change the attributes of the land, overcomes the shortcomings of scarce land resources and slow development of ground photovoltaic power stations. The present invention utilizes photovoltaic energy to not only realize the function of light source, but also realizes a new mode of integrated water and fertilizer cultivation in tea gardens, providing a variety of solutions for smart tea gardens, green energy tea gardens, and low-carbon tea gardens. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents shown in these drawings without paying creative work.

[0026] Figure 1 This is a comparison chart of the EGCG content in Analysis Example 1 of the present invention;

[0027] Figure 2 This is a comparison chart of the catechin content in Analysis Example 1 of the present invention.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number and order of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In Example 1 and Comparative Examples 1-3 of the present invention, except for the conditions for comparison, all other conditions remain the same.

[0032] Light has a significant effect on the EGCG content in tea trees; when the light intensity is sufficient, tea trees can perform photosynthesis better, thereby increasing the production of EGCG; the light duration will also affect the EGCG content, and extending the light duration can increase the photosynthesis time of tea trees, thereby increasing the production of EGCG. Light of different wavelengths has different effects on the photosynthesis efficiency and EGCG production of tea trees. Red light and blue light have little effect on the thickness of the leaves of the young shoots of tea trees, while blue light supplementation treatment is conducive to the growth of the thickness of the leaves of the young shoots; at the same time, too long light duration and too high light intensity will also inhibit the growth and development of tea trees and reduce the accumulation of EGCG in tea gardens.

[0033] The present invention provides a method for managing tea trees with high EGCG content in a photovoltaic tea garden, comprising: performing light management on tea trees in the photovoltaic tea garden, thereby increasing the EGCG content of the tea trees; in the present invention, EGCG refers to epigallocatechin gallate. In the present invention, the light management starts 30 to 40 days before tea leaves are picked until tea leaves are picked.

[0034] The lighting management includes: during a preset supplementary lighting period of a natural day, when the ambient light intensity is not greater than a preset light intensity value, starting a mixed light source to perform supplementary lighting treatment on the tea trees; the mixed light source includes a first light source, a second light source and a third light source, the first light source includes or is a red light source, the second light source includes or is a blue light source, and the third light source includes or is a white light source; in the present invention, the light intensity ratio of the first light source, the second light source and the third light source is 1-2:2-3:5-7, specifically 1:2:7; that is, the light source in the present invention can be composed of red light, blue light and white light.

[0035] In the present invention, the total light intensity of the mixed light source can be 5.0 to 30.0 μmol·m -2 ·s -1 , further 10.0~30.0μmol·m -2 ·s -1The duration of the preset fill light period is not greater than 16 hours, further 12 to 16 hours, and specifically 16 hours; the preset fill light period is selected within the range of 6 am to 10 pm, and specifically can be 6 am to 10 pm.

[0036] In the present invention, the preset light intensity value may be 200±20 μmol·m -2 ·s -1 , specifically 200 μmol·m -2 ·s -1 For example, during the preset supplementary light period, when the ambient light intensity is ≤200 μmol·m -2 ·s -1 When the first light source, the second light source and the third light source are used to supplement the light for the tea trees in the photovoltaic tea garden at the same time. As an explanation of the light source, the wavelength of the blue light is 440-460nm; the wavelength of the red light is 650-670nm.

[0037] In the present invention, the data of the lighting conditions of tea trees can be obtained in advance: the lighting data of tea trees in the photovoltaic tea garden is collected, and the lighting data of the tea trees is processed to obtain a lighting database. By constructing the lighting database, the growth environment of the tea trees can be monitored in real time, so as to separate the growth rules of the tea trees.

[0038] In the present invention, the first light source, the second light source and the third light source can be used as a mixed light source in the form of a fill light, and powered by a photovoltaic panel. The installation of the fill light may include: the photovoltaic panel has a length*width of 10*2m and a height of 2.8m; a mixed fill light is installed on the photovoltaic panel, the spacing of the mixed fill lights is 4m, and the distance from the tea tree canopy is about 2m; as a supplementary explanation, the spacing of the mixed fill lights can be 3-5m, and the distance from the tea tree canopy can be 1.9-2.1m. In the present invention, the mixed light source is composed of red light, blue light and white light; appropriately increasing the ratio of red and blue light is beneficial to the accumulation of EGCG in the photovoltaic tea garden.

[0039] As a further explanation of the management method of tea trees with high EGCG content in a photovoltaic tea garden, the management method of tea trees with high EGCG content in the photovoltaic tea garden may also include water and fertilizer management; the water and fertilizer management includes: applying base fertilizer and topdressing to the photovoltaic tea garden; the base fertilizer includes organic fertilizer, the topdressing includes inorganic fertilizer, and the topdressing is combined with water irrigation.

[0040] That is, in the present invention, organic fertilizer is combined with inorganic fertilizer and water irrigation is combined. Specifically, the photovoltaic tea garden applies organic fertilizer as base fertilizer, which is comprehensive in nutrition, rich in organic matter, and has a slow and lasting fertilizer effect, so the main fertilization method is root application; the photovoltaic tea garden applies topdressing mainly with inorganic fertilizer, and trace nutrients have a profound impact on the normal physiological activities of tea trees, and the effect is fast, so the inorganic fertilizer is combined with water irrigation, and the inorganic fertilizer is supplemented to the tea garden while watering.

[0041] The organic fertilizers used in tea gardens mainly include: manure, cake fertilizer, humic acid fertilizer and green manure. Organic fertilizers are comprehensive in nutrition, rich in organic matter, and have a slow and lasting fertilizer effect; they promote the improvement of soil structure and can enhance the activity of soil microorganisms, but they cannot meet the requirements of large fertilizer requirements and fast absorption during the growth and development of tea trees; therefore, they need to be applied together with inorganic fertilizers. Inorganic fertilizers, also known as chemical fertilizers, are divided into nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, compound fertilizers and trace element fertilizers according to the nutrients they contain; the inorganic fertilizers in the present invention mainly contain nitrogen or mainly include nitrogen fertilizers.

[0042] It should be pointed out that among the three elements of nitrogen, phosphorus and potassium required by tea trees, nitrogen is the most needed, followed by potassium, and phosphorus, so the production is mainly based on increasing nitrogen fertilizer. Nitrogen fertilizer also has the best effect on increasing tea production, and the economic benefits of applying nitrogen fertilizer are often very significant. Trace nutrients have a profound impact on the normal physiological activities of tea trees. When they are lacking, metabolism is often disturbed or destroyed, forming physiological lesions, resulting in a decrease in tea yield and quality. In the present invention, high EGCG content tea trees are fertilized with nitrogen fertilizer as the main fertilizer, combined with nitrogen, phosphorus, potassium fertilizer and other element fertilizers.

[0043] The photovoltaic tea garden of the present invention heavily applies basal fertilizer: the basal fertilizer application time is generally in mid-November, mainly organic fertilizer, appropriately combined with chemical fertilizer; once a year, 500-1000kg / mu of farmer's organic fertilizer, and 15-20kg / mu of ordinary compound fertilizer are applied; combined with winter ploughing, 20-25cm of furrows are opened and applied, and soil is covered after application.

[0044] In the present invention, topdressing is seasonal, mainly with quick-acting inorganic fertilizers, and integrated fertilization of water and fertilizer is carried out according to soil conditions; in the stage other than topdressing, the photovoltaic tea garden is normally monitored and watered. In the present invention, the first topdressing is carried out in early February. At this time, the temperature warms up, and the tea leaves in the photovoltaic tea garden begin to recover. The fertilizer is applied along the drip line of the crown surface. This time, nitrogen fertilizer is the main fertilizer, supplemented with other fertilizers such as potassium fertilizer; 5 to 15 kg of special nitrogen fertilizer or urea for tea gardens is applied per mu. After the spring tea picking is over, the second fertilization is carried out from May to September. This fertilization is mainly compound fertilizer, and 20 to 30 kg of fertilizer is applied per mu; this is in summer and autumn, the temperature is high, evaporation is fast, and plants grow rapidly. Therefore, this fertilization is combined with soil moisture content, and water and fertilizer are applied in 3 to 4 times, and water is supplemented during the period to prevent seedling burning.

[0045] In the present invention, the water and fertilizer management also includes: monitoring the soil environment of the photovoltaic tea garden, when the soil environment of the photovoltaic tea garden reaches a preset drought standard, the ratio of the single topdressing to the water in the water irrigation is a first ratio; when the soil environment of the photovoltaic tea garden is between the preset drought standard and the preset moisture standard, the ratio of the single topdressing to the water in the water irrigation is a second ratio; when the soil environment of the photovoltaic tea garden reaches the preset moisture standard, the photovoltaic tea garden is drained, and the ratio of the topdressing to the water in the water irrigation is a third ratio, and the topdressing is applied in the form of foliar fertilizer; the first ratio is less than the second ratio, and the second ratio is less than the third ratio; the ratio properties of the first ratio, the second ratio and the third ratio are not limited, and can specifically be a mass ratio.

[0046] As an example, the soil pH value and water content of the photovoltaic tea garden can be collected, and then the soil data can be processed to obtain a database; according to the soil water content and combined with weather conditions, the tea garden can be reasonably irrigated with water and fertilizer. When drought occurs, the soil evaporation is large, and when water and fertilizer are integrated, the content of single inorganic fertilizer should be appropriately reduced, and the number of times water and fertilizer are applied can be appropriately increased; when moisture damage occurs, attention should be paid to soil drainage, reducing water supply, and applying water and fertilizer in the form of foliar fertilizer.

[0047] It should be noted that tea tree pruning is an important part of tea garden management. It is not only related to the growth and yield of tea trees, but also directly affects the quality of tea. In order to ensure the healthy growth of tea trees and improve the quality of tea, it is necessary to master the correct pruning time and method.

[0048] As a further explanation of the management method of tea trees with high EGCG content in the photovoltaic tea garden, the management method of tea trees with high EGCG content in the photovoltaic tea garden also includes pruning management; the pruning management includes: pruning the tea trees during the growing period and pruning them during the dormant period; that is, the time for pruning the tea trees is mainly divided into two stages: pruning during the growing period and pruning during the dormant period.

[0049] Growing season pruning: Growing season pruning is usually done in spring, when the tea trees begin to sprout new buds. Pruning during this period can promote the branching and growth of tea trees, increase the photosynthesis area, and thus improve yield and quality. The specific time should be determined according to local climatic conditions and the growth of tea trees. It is generally done after the temperature rises in spring and the tea trees begin to sprout new buds.

[0050] Specifically, pruning during the growing season is usually carried out from mid-February to early March. At this time, the tea trees are before sprouting new buds. Appropriate light to moderate pruning is done to remove sick and weak branches and dead branches on the tea trees to keep the tea trees clean and ventilated.

[0051] Dormant pruning: Dormant pruning is usually done in winter, when the tea trees enter a dormant state; pruning during this period can help the tea trees remove diseased and weak branches, reduce nutrient consumption, and prepare for next year's growth.

[0052] Specifically, dormant pruning usually occurs after October, when tea trees enter a dormant state. Pruning during this period can help tea trees remove diseased and weak branches, reduce nutrient consumption, and prepare for next year's growth. Heavy pruning is mainly performed: a large number of old branches and diseased and insect-infested branches are removed to promote the renewal and growth of tea trees.

[0053] As a supplementary explanation of tea garden pruning, the methods of light pruning, medium pruning and moderate pruning are:

[0054] Light pruning: Light pruning mainly involves removing sick and dead branches from tea trees to keep them clean and ventilated.

[0055] Moderate pruning: Moderate pruning is based on light pruning, which further removes some dense and weak branches to promote the branching and growth of tea trees.

[0056] Heavy pruning: Heavy pruning is based on moderate pruning, which further removes some old branches and diseased and insect-infested branches to promote the renewal and growth of tea trees.

[0057] The following are specific examples of the present invention:

[0058] Example 1

[0059] In the tea garden of this embodiment, photovoltaic panels are set up, and the specifications of the photovoltaic panels are 10*2m and 2.8m high. The management process of the tea trees in this embodiment is as follows:

[0060] 1. Lighting management:

[0061] Install fill light: Install mixed fill light source on the photovoltaic panel, the spacing of mixed fill light source is 4m, and it is about 2m away from the tea tree canopy; the mixed fill light source is composed of red light, blue light and white light, and the light intensity ratio of red light, blue light and white light is 1:2:7.

[0062] The lighting management of this embodiment starts 30 days before tea picking and lasts until tea picking. In the lighting management of this embodiment, the start-up conditions of the mixed fill light source are: from 6 am to 10 pm, when the ambient light intensity is ≤ 200 μmol·m -2 ·s -1 When the mixed light source is started, the tea tree is supplemented with light, and the light intensity is set to 20 μmol·m -2 ·s -1 (Total light intensity of three light sources).

[0063] 2. Water and fertilizer management:

[0064] Fertilization of tea trees is mainly based on basal fertilizer, and topdressing should be carried out in time in stages.

[0065] The base fertilizer is applied in mid-November, and the application method is root application. About 750kg of organic fertilizer is applied per mu, and about 17kg of ordinary compound fertilizer is applied per mu, and the soil is covered after application. Topdressing is seasonal, mainly quick-acting inorganic fertilizer, and water and fertilizer are integrated according to soil conditions; in the stage other than topdressing, the photovoltaic tea garden is monitored and watered normally.

[0066] 3. Pruning management:

[0067] Pruning during the growing season: From mid-February to early March, carry out appropriate light to moderate pruning to remove sick and weak branches and dead branches on the tea trees, and keep the tea trees clean and ventilated.

[0068] Dormant pruning: Dormant pruning takes place after October, and mainly involves heavy pruning, removing a large number of old branches and diseased and insect-infested branches to promote the renewal and growth of tea trees.

[0069] Comparative Example 1

[0070] Compared with Example 1, in this comparative example, no photovoltaic panels were set up in the tea garden, and no light management was performed. Other conditions were the same as in Example 1.

[0071] Comparative Example 2

[0072] Compared with Example 1, this comparative example did not perform light management, and other conditions were the same as Example 1.

[0073] Comparative Example 3

[0074] Compared with Example 1, in this comparative example, no photovoltaic panels were set up in the tea garden, but light management was carried out, and other conditions were the same as in Example 1.

[0075] The lighting management of this comparative example starts 30 days before tea picking and lasts until tea picking. In this comparative example, the spacing of the mixed supplementary light source is 4m, and the distance from the tea tree canopy is about 2m. During the lighting management of this comparative example, the starting conditions of the mixed supplementary light source are: from 6 am to 10 pm, when the ambient light intensity is ≤200μmol·m -2 ·s -1 When the mixed light source is started, the tea tree is supplemented with light, and the light intensity is set to 20 μmol·m -2 ·s -1 (Total light intensity of three light sources).

[0076] Analysis example 1

[0077] Fresh tea leaves were picked and tested; Comparative Example 1 was recorded as CG-CK, Comparative Example 2 was recorded as CG-GF, Comparative Example 3 was recorded as SY-CK, and Example 1 was recorded as SY-GF; the results of the content of EGCG and catechins in the dry weight of tea leaves are shown in Tables 1 and Figure 1-2 shown.

[0078] Table 1 EGCG and catechin content

[0079] CG-CK CG-GF SY-CK SY-GF EGCG (mg / g) 55.58 44.94 64.01 73.35 Catechins(mg / g) 113.99 87.27 132.78 117.31

[0080] like Figure 1-2 As shown in the figure, in CG-CK and CG-GF, the tea garden was not supplemented with light; compared with the open-air tea garden CG-CK, the EGCG content of the photovoltaic tea garden CG-GF decreased by 19.14%, and the catechin content decreased by 23.44%; the construction of photovoltaic facilities reduced the content of catechins including EGCG in the tea garden. However, after implementing light supplementation, it was found that compared with the open-air tea garden SY-CK, the EGCG content of the photovoltaic tea garden SY-GF increased by 14.59%, and the catechin content decreased by 11.65%.

[0081] Comparison of the photovoltaic tea garden GF and the open-air tea garden CK revealed that different management modes led to significant changes in the content of catechins and EGCG in the tea garden. Specific light supplementation in the photovoltaic tea garden helps to increase the content of EGCG in the tea garden; and in the photovoltaic tea garden, EGCG accumulates faster than catechins. In the SY-GF group, the catechin content increased by only 2.91% compared with the conventional tea garden CG-CK without light supplementation, but the EGCG content increased by 31.97%.

[0082] The above technical solutions of the present invention are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for managing tea trees with high EGCG content in a photovoltaic tea garden, characterized in that: include: Carry out light management for tea trees in photovoltaic tea gardens; The lighting management includes: during a preset supplementary lighting period of a natural day, when the ambient light intensity is not greater than a preset light intensity value, starting a mixed light source to perform supplementary lighting treatment on the tea trees; the mixed light source includes a first light source, a second light source and a third light source, the first light source includes a red light source, the second light source includes a blue light source, and the third light source includes a white light source.

2. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 1, characterized in that: The light intensity ratio of the first light source, the second light source and the third light source is 1-2:2-3:5-7.

3. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 1, characterized in that: The total light intensity of the mixed light source is 5.0 to 30.0 μmol·m -2 ·s -1 .

4. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 1, characterized in that: The duration of the preset fill light period is no more than 16 hours; the preset fill light period is selected within the range of 6 am to 10 pm.

5. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 1, characterized in that: The preset light intensity value is 200±20 μmol·m -2 ·s -1 .

6. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 1, characterized in that: The wavelength of the blue light is 440-460 nm; the wavelength of the red light is 650-670 nm.

7. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to any one of claims 1 to 6, characterized in that: The management method also includes water and fertilizer management; The water and fertilizer management includes: applying base fertilizer and topdressing fertilizer to the photovoltaic tea garden; the base fertilizer includes organic fertilizer, the topdressing fertilizer includes inorganic fertilizer, and the topdressing fertilizer is combined with water irrigation.

8. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 7, characterized in that: The inorganic fertilizer includes nitrogen fertilizer.

9. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to claim 7, characterized in that: The water and fertilizer management further includes: monitoring the soil environment of the photovoltaic tea garden, and when the soil environment of the photovoltaic tea garden reaches a preset drought standard, the ratio of the topdressing to the water in the water irrigation is a first ratio; When the soil environment of the photovoltaic tea garden is between the preset drought standard and the preset moisture damage standard, the ratio of the topdressing to the water in the water irrigation is the second ratio; When the soil environment of the photovoltaic tea garden reaches the preset moisture damage standard, the photovoltaic tea garden is drained, and the ratio of the second topdressing to the water in the water irrigation is a third ratio, and the topdressing is applied in the form of foliar fertilizer; The first ratio is smaller than the second ratio, and the second ratio is smaller than the third ratio.

10. The method for managing tea trees with high EGCG content in a photovoltaic tea garden according to any one of claims 1 to 6, characterized in that: The management method also includes pruning management; the pruning management includes: pruning the tea trees during the growing period and pruning them during the dormant period.

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