A method for improving the quality and increasing the yield of tea trees by supplementing light based on photovoltaic tea gardens

Abstract

The present invention provides a method for improving the quality and yield of tea trees by supplementing light based on a photovoltaic tea garden, comprising the following steps: S1, obtaining the pre-picking date of the tea trees and analyzing the difference in days between the pre-picking date and the current date; the tea trees are planted in the photovoltaic tea garden; S2, when the difference in days is less than a first preset number of days, triggering a supplementary ripening instruction; S3, after triggering the supplementary ripening instruction, obtaining time point information within each natural day; when the time point is within a first preset time period of the natural day, collecting ambient light intensity information; when the ambient light intensity is less than the first preset supplementary ripening light intensity value, supplementing light to the tea trees using a first set light source, wherein the first set light source includes one or more of white light and blue-violet light. The present invention can not only increase tea yield based on the photovoltaic tea garden, but also improve tea quality.

Description

Technical Field

[0001] The present invention belongs to the field of agriculture, and in particular relates to a method for improving the quality and increasing the yield of tea trees by supplementing light based on a photovoltaic tea garden. Background Art

[0002] Tea (Camellia sinensis) is one of the world's three major beverage crops and a key cash crop in my country, widely cultivated in many tropical and subtropical countries. Over its long evolutionary history, tea plants have developed a preference for shade, warmth, humidity, and diffuse light. Tea's photosynthesis and secondary metabolism respond specifically to the light spectrum, directly influencing the content of bioactive compounds in tea leaves, particularly theanine.

[0003] Photovoltaic systems in tea gardens are a novel agricultural model that combines modern agriculture with renewable energy technologies, offering multiple advantages. They aim to achieve the dual goals of solar power generation and agricultural production. By installing solar panels within tea gardens, they effectively utilize land resources and achieve a complementary agricultural and photovoltaic system, without compromising the growth of tea trees or the quality of tea leaves. Photovoltaic systems also provide stable, clean energy for tea gardens, reducing reliance on traditional fossil fuels and greenhouse gas emissions, thus aligning with the concept of green development. Furthermore, photovoltaic panels provide a degree of shade for tea trees, reducing soil evaporation and improving microclimate conditions, thereby boosting tea yield and quality. PV panels are typically constructed of weather-resistant materials, offering protection against harsh weather and low maintenance costs. Furthermore, intelligent management allows for real-time monitoring of the system's operating status, enabling timely adjustments to energy output and ensuring reliable power supply. From an economic perspective, photovoltaic projects in tea gardens can generate additional income for tea farmers, generating revenue through grid-connected electricity sales, and improving the overall economic benefits of the tea gardens. In the long term, this project will help promote agricultural modernization, enhance agricultural sustainability, and contribute to the rural revitalization strategy. Although the application value of photovoltaics in tea gardens is great; however, after the implementation of photovoltaics in tea gardens, since the lighting system of tea trees will be different from natural light, if only conventional management and maintenance methods are used, it is easy to reduce the yield and quality of tea; therefore, it is necessary to implement new management and maintenance methods for tea trees based on the actual situation of photovoltaics in tea gardens.

[0004] In view of this, it is necessary to provide a method for improving the quality and yield of tea trees by supplementing light based on photovoltaic tea gardens, so as to solve or at least alleviate the technical problem of how to improve the yield and quality of tea based on photovoltaic tea gardens. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for improving the quality and yield of tea trees by supplementing light based on a photovoltaic tea garden, aiming to solve the above-mentioned technical problem of how to improve the yield and quality of tea based on a photovoltaic tea garden.

[0006] To achieve the above-mentioned purpose, the present invention provides a method for improving the quality and yield of tea trees by supplementing light based on a photovoltaic tea garden, comprising the following steps:

[0007] S1, obtaining the pre-picking date of the tea trees and analyzing the difference in days between the pre-picking date and the current date; the tea trees are planted in a photovoltaic tea garden;

[0008] S2, when the difference in days is less than a first preset number of days, triggering a re-cooking instruction;

[0009] S3, according to the ripening supplement instruction, obtain the time point information in each natural day; when the time point is in the first preset time period of the natural day, collect the ambient light intensity information; when the ambient light intensity is less than the first preset ripening supplement light intensity value, use the first set light source to supplement the light to the tea tree, and the first set light source includes one or more of white light and blue-violet light.

[0010] Furthermore, the first set light source includes blue-violet light.

[0011] Furthermore, when the ambient light intensity is not less than the first preset ripening light intensity value and less than the second preset ripening light intensity value, a second set light source is used to supplement light to the tea tree; the first preset ripening light intensity value is less than the second preset ripening light intensity value; the first set light source includes one of white light and blue-violet light, and the second set light source includes the other of white light and blue-violet light.

[0012] Furthermore, the first set light source includes blue-violet light, and the second set light source includes white light.

[0013] Furthermore, when the difference in days is less than a second preset number of days, the ripening instruction is terminated, and the second preset number of days is less than the first preset number of days; or, when the difference between the actual picking date and the current date is less than the second preset number of days, the ripening instruction is terminated.

[0014] Furthermore, the step S2 also includes: when the difference in the number of days is not less than the first preset number of days, obtaining information on the time point in each natural day, and when the time point is in the second preset time period of the natural day, collecting ambient light intensity information; when the ambient light intensity is less than the preset growth-promoting light intensity value, using a third light source to supplement light to the tea tree, and the third light source includes white light.

[0015] Furthermore, the duration of the second preset period is shorter than the duration of the first preset period.

[0016] Furthermore, the preset growth-promoting light intensity value is smaller than the first preset ripening-complementing light intensity value.

[0017] Furthermore, the first preset number of days is selected from 25-45 days.

[0018] Furthermore, the wavelength of the blue-violet light is 430nm, and the irradiation intensity of the tea tree canopy reaches 8-32μmol·m -2 ·s -1 .

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] The present invention can not only increase the tea yield based on the photovoltaic tea garden, but also improve the quality of the tea; specifically, by judging the difference in the number of days, when the tea enters the ripening period, the ripening instruction is triggered, so that the tea is supplemented with light during the ripening period; the present invention can significantly increase the tea yield by adopting white light, and can significantly increase the theanine content by adopting blue-violet light; and, since tea trees are usually grown in mountainous areas and their light intensity will be further reduced under the photovoltaic panels, when the ambient light intensity is low, the light that the tea trees can receive is weak, and therefore it is necessary to supplement the light to the tea trees in time according to the changes in the ambient light intensity within the first preset time period to ensure the yield and quality of the tea.

[0021] During the ripening period, since blue-violet light can significantly increase theanine content, blue-violet light can be used as a supplementary light source during the ripening period when the ambient light intensity is lower than the first preset ripening light intensity value; based on this, in view of the effect of white light on improving yield and the shielding of tea trees by photovoltaic panels, white light (equivalent to simulated natural light) can be used as a supplementary light source when the ambient light intensity is between the first preset ripening light intensity value and the second preset ripening light intensity value, so that the tea trees can be in an environment with relatively high light intensity when not irradiated with blue-violet light, further ensuring the yield and quality of tea.

[0022] Given that photovoltaic panels will block tea trees for long periods of time, when the intensity of natural light is low, supplemental lighting can be used during the non-ripening period to maintain the light intensity received by the tea trees. However, long-term exposure to a single blue-violet light source is not conducive to the development of tea trees, and the effect of blue-violet light on tea tree growth is not as good as natural light. Therefore, white light can be used for supplemental lighting during the non-ripening period to ensure normal growth and nutrient accumulation of the tea trees. In addition, because the non-ripening period is longer and tea trees do not require long periods of intense light for normal growth, the daily supplemental lighting time can be reduced compared to the ripening period, and the threshold for triggering supplemental lighting can be lowered to adapt to the growth habits of the tea trees. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 structures shown in these drawings without paying any creative work.

[0024] Figure 1 The figure is a flow chart of a method for improving the quality and increasing the yield of tea trees based on photovoltaic tea gardens in one embodiment of the present invention.

[0025] The realization of the objectives, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0027] Moreover, 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 ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number and order of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In the present invention, unless otherwise specified, the raw materials used are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used are all methods mastered by those skilled in the art; unless otherwise specified, in addition to the supplementary lighting, all production activities such as fertilization, weeding, pest control, irrigation, etc. in the photovoltaic tea garden are carried out normally; when analyzing the light source effect, the control group uses a photovoltaic tea garden without any supplementary lighting; in the case of the present invention, the white light is full-spectrum white light, the wavelength of blue-violet light is 430nm, and the wavelength of yellow-orange light is 590nm.

[0029] It's important to understand that theanine is one of the main flavor components of tea. It not only imparts a refreshing taste but also contributes to tea's health benefits, having a decisive influence on its taste and aroma. Under the light conditions of a tea garden, tea plants primarily absorb light energy for photosynthesis through pigments in their chloroplasts, such as chlorophyll a and chlorophyll b. These pigments primarily absorb blue and red light, while reflecting green light, which is why the leaves appear green. The photosynthetic efficiency of tea plants is affected by factors such as light intensity and light quality (spectral composition). Furthermore, the synthesis and accumulation of theanine are regulated by a variety of factors, including gene expression, enzyme activity, nitrogen supply, and environmental stress. Appropriate light exposure promotes theanine synthesis, particularly under moderate light conditions, allowing tea plants to produce more theanine. However, under strong light or excessive shade, theanine content may decrease. Therefore, effective light regulation is a key approach to increasing theanine content in tea gardens. For example, timely pruning tea trees to increase light transmittance or installing shade nets to regulate light intensity can effectively influence photosynthesis and theanine synthesis. Furthermore, tea trees' photosynthesis and secondary metabolism processes exhibit specific responses to light spectrum, which directly influence the content of bioactive substances in tea leaves, particularly theanine. Exposure to different wavelengths of light results in the formation of different endogenous substances. Red light promotes the formation of tea polyphenols, while blue-violet light promotes the synthesis of amino acids and proteins. The spectral requirements of tea plants are closely related to their growth and development, as well as the synthesis of secondary metabolites. Managing light conditions can effectively increase the content of beneficial components such as theanine, thereby enhancing the quality and market value of tea. In the tea garden photovoltaic system, through the reasonable design and use of plant fill lights with a specific spectrum, the light lost by tea trees under the shade of photovoltaic panels can be effectively supplemented, thereby improving the quality of tea, especially increasing the content of theanine.

[0030] In order to improve the yield and quality of tea leaves at the same time, the present invention provides a method for improving the quality and yield of tea trees by supplementing light based on a photovoltaic tea garden, comprising the following steps:

[0031] S1, obtaining the pre-picking date of the tea trees and analyzing the difference in days between the pre-picking date and the current date; the tea trees are planted in a photovoltaic tea garden, and photovoltaic panels are set up in the photovoltaic tea garden; the present invention installs corresponding LED light sources under the photovoltaic panels, and the tea garden in the present invention can be located in a mountainous area, especially a high-altitude mountainous area.

[0032] In the present invention, the current date in step S1 is between the last actual plucking date and the pre-plucking date. The pre-plucking date for the tea tree is the theoretical next ripening date of the tea leaves, which is determined by those skilled in the art based on the local growth habits of the tea tree and the tea growth cycle. It can be consistent with the actual plucking date, and some deviation from the actual plucking date is allowed, so as not to affect the plucking of mature tea leaves. In an embodiment of the present invention, the photovoltaic panel in the tea garden is installed at a height of 2.6m, and the photovoltaic panel used is 10m long and 4m wide.

[0033] S2. When the difference in days is less than a first preset number of days, a re-cooking instruction is triggered.

[0034] In the present invention, when the difference in days is less than the first preset number of days, the corresponding tea tree enters the supplementary ripening period. By performing specific supplementary lighting operations during the supplementary ripening period, the growth rate, amount of growth, and theanine content of the tea leaves can be adjusted, thereby obtaining high-yield and high-quality tea leaves before and after the pre-picking date; the high quality in the present invention is primarily reflected in theanine content. In the present invention, before the pre-picking date is determined, it is assumed that the difference in days is no less than the first preset number of days. After the pre-picking date is determined, it is determined whether the difference in days is less than the first preset number of days based on the difference in the dates.

[0035] In the present invention, as an optional method, the first preset number of days can be selected within 25-45 days, or can be adjusted according to the local tea growth conditions, so that the tea leaves are in the supplementary ripening period when the difference in the number of days is less than the first preset number of days. The supplementary ripening period is mainly to effectively regulate the nutrients contained in the tea leaves; the accumulation and transformation of tea substances need to be controlled and regulated during the growth process of the tea leaves; therefore, at this stage, the tea trees need to be supplemented with corresponding light sources.

[0036] S3, after triggering the ripening supplement instruction, obtain the information of the time point in each natural day according to the ripening supplement instruction; when the time point is in the first preset time period of the natural day, collect the ambient light intensity information; when the ambient light intensity is less than the first preset ripening supplement light intensity value, use the first set light source to supplement the light to the tea tree, and the first set light source includes one or more of white light and blue-violet light.

[0037] The present invention uses a white light source to simulate natural light, which is an LED cold light source; the wavelength of the blue-violet light used in the present invention is 430nm, and the irradiation intensity can reach 8-32μmol·m -2 ·s -1The first preset time period may be ≤17h or ≤16h or, for example, 12-16h, specifically 16h; the first preset time period may be 5:00-21:00 on a natural day, i.e., 5:00 a.m. to 9:00 p.m.; the first preset supplementary light intensity value may be 170-230 μmol·m -2 ·s -1 , specifically 200 μmol·m -2 ·s -1 .

[0038] In the present invention, the supplementary ripening instruction can continue to exist until a termination condition is triggered or the tea leaves reach the picking standard. When the tea leaves enter the supplementary ripening period, the supplementary ripening instruction is triggered, and the time points within each natural day are continuously monitored. During the supplementary ripening period, when the time point falls within the first preset time period, the ambient light intensity is determined to determine whether to supplement the tea leaves.

[0039] In the present invention, based on the energy supply of photovoltaic panels in the tea garden, by supplementing white light to the tea trees, the germination of the tea trees can be promoted, the density of new shoots and the weight of one bud and two leaves can be increased, and the content of theanine can be increased; among them, the promoting effect of promoting the germination of tea trees and increasing the density of new shoots and the weight of one bud and two leaves is more obvious.

[0040] In the present invention, based on the energy supply of photovoltaic panels in the tea garden, by supplementing blue and purple light to the tea trees, the germination of the tea trees can also be promoted, the density of new shoots and the weight of one bud and two leaves can be increased, and the content of theanine can be increased; among them, the promoting effect on the content of theanine is more obvious.

[0041] Therefore, the first set light source can include white light, thereby significantly increasing tea yield while ensuring theanine content. The first set light source can also include blue-violet light, thereby significantly increasing theanine content while ensuring yield. In the present invention, the first set light source can also optionally include red-orange light. The wavelength of the yellow-orange light used in the present invention is 590nm. In the present invention, the first set light source is preferably blue-violet light.

[0042] In order to significantly increase the theanine content while significantly promoting the germination of tea trees, increasing the density of new shoots and the weight of one bud and two leaves, when the ambient light intensity is not less than the first preset ripening light intensity value, it is determined whether the ambient light intensity is less than the second preset ripening light intensity value; when the ambient light intensity is not less than the first preset ripening light intensity value and less than the second preset ripening light intensity value, a second set light source is used to supplement light to the tea trees; the first preset ripening light intensity value is less than the second preset ripening light intensity value, and the second preset ripening light intensity value can be determined according to local lighting conditions and tea tree habits, so as to ensure white light illumination of the tea trees; the first set light source includes one of white light and blue-violet light, and the second set light source includes the other of white light and blue-violet light.

[0043] Exemplarily, the first set light source includes or is blue-violet light, and the second set light source includes or is white light. By defining the first set light source as blue-violet light, the tea plant can be irradiated with blue-violet light when the ambient light intensity is lower than the first preset ripening light intensity value, thereby significantly increasing theanine content. Furthermore, since blue-violet light has an upper limit on the improvement of tea plant germination, shoot density, and the weight of one bud and two leaves, and long-term irradiation with a single wavelength can easily affect the normal growth of the plant, blue-violet light is only used for irradiation when the ambient light intensity is lower than the first preset ripening light intensity value, thereby maximizing efficiency while ensuring its effectiveness.

[0044] By defining the second set light source as white light, it is not only possible to ensure that the tea tree is irradiated with blue-violet light when the ambient light intensity is lower than the first preset ripening light intensity value, but also to supplement white light when the ambient light intensity is between the first preset ripening light intensity value and the second preset ripening light intensity value, thereby ensuring that within the first preset period of the ripening period, the tea tree can receive light of a certain intensity at other times when irradiated with blue-violet light; it should be noted that when the ambient light intensity is high, the tea tree directly receives natural light, and when the ambient light intensity is as low as the second preset ripening light intensity value, the tea tree can receive natural light and supplementary white light at the same time, thereby ensuring light intensity, promoting the growth of tea trees and the yield of tea leaves, and increasing the theanine content; when the ambient light intensity is as low as the first preset ripening light intensity value, it is just possible to supplement blue-violet light, thereby significantly increasing the theanine content.

[0045] In the present invention, in order to control the duration of re-ripening before picking, the re-ripening process is terminated in time; when the difference in the number of days is less than the second preset number of days, the re-ripening instruction is terminated, that is, no supplementary light is applied to the tea tree in any form; the second preset number of days is less than the first preset number of days, and the second preset number of days can be 1-3 days, specifically 2 days; when the second preset number of days is less than 1 day. Or, when the difference between the actual picking date and the current date is less than the second preset number of days, the re-ripening instruction is terminated. Or, the re-ripening instruction is terminated one or two days before the actual picking date. In the present invention, after the re-ripening instruction is terminated, it represents the end of the execution of the operation of step S3.

[0046] In the present invention, as a supplement to the ripening period, the step S2 may further include: when the difference in the number of days is not less than the first preset number of days, obtaining information on the time point in each natural day, and when the time point is in the second preset period of the natural day, collecting information on the ambient light intensity; when the ambient light intensity is less than the preset growth-promoting light intensity value, using a third light source to supplement light to the tea tree, and the third light source includes white light. It should be noted that by supplementing light in the stage outside the ripening period, the growth of the tea tree can be maintained at ordinary times, and the photovoltaic panels can be prevented from blocking light and affecting the growth of the tea tree when the natural light is poor for a long time. Since the growth and metabolic activities of tea trees usually need to be reduced during the dormant period, the above process can further be: when the difference in the number of days is not less than the first preset number of days, and the tea tree is in the growing period or the non-dormant period, obtaining information on the time point in each natural day, and when the time point is in the second preset period of the natural day, collecting information on the ambient light intensity; when the ambient light intensity is less than the preset growth-promoting light intensity value, using a third light source to supplement light to the tea tree.

[0047] In the present invention, since the growth of tea trees only needs to be properly maintained when natural light is poor outside the ripening period, there is no need for continuous supplementary lighting. Therefore, compared with the ripening period, the period of supplementary lighting can be reduced, thereby extending the service life of the supplementary lighting and reducing energy consumption; specifically, the duration of the second preset period can be less than the duration of the first preset period; and / or, the preset growth-promoting light intensity value can be less than the first preset ripening light intensity value. By lowering the preset growth-promoting light intensity value, the duration of supplementary lighting can be reduced, thereby controlling the duration of supplementary lighting outside the ripening period; the second preset period and the preset growth-promoting light intensity value can be determined based on the local all-day light duration and tea tree habits, and in combination with the season; the first preset period and the second preset period can both include 12-14 o'clock (hours) on a natural day.

[0048] In the present invention, the light source intensities of the first set light source, the second set light source and the third set light source can all be such that the light intensity of the tea tree canopy reaches 8-32 μmol·m -2 ·s -1 The preferred range is 18-32 μmol·m -2 ·s -1 , specifically 10±2μmol·m -2 ·s -1 or 20 ± 2 μmol·m -2 ·s -1 or 30 ± 2 μmol·m -2 ·s -1 ; The first setting light source, the second setting light source and the third setting light source can all be at a height distance of ≥1.5m from the tea tree canopy, specifically 1.5m; the first setting light source, the second setting light source and the third setting light source are all powered by photovoltaic panels.

[0049] As a supplementary explanation to the present invention, the tea tree is a perennial woody plant. It begins to bear fruit for the first time 3 to 5 years after the tea seedlings are transplanted and reaches the mature stage. At this time, the tea garden begins to produce tea leaves. At present, there are a large number of mature tea gardens in my country, and this is also the main stage of tea production. At the same time, as a light-loving plant, the growth and development and secondary metabolic processes of the tea tree are closely related to light. Light not only affects the photosynthesis of the tea tree, but also plays an important role in the synthesis of bioactive substances in tea leaves. For example, theanine is a key component that determines the fresh taste of tea, and its content is directly related to the intensity and quality of light. Tea picking usually occurs in late spring and early summer each year. During this period, southern my country, especially Yunnan and Guizhou, is usually rainy and foggy, and the average sunshine time is short. At the same time, the construction of photovoltaic equipment provides a certain degree of shade to the tea trees, resulting in insufficient light for the tea trees in Guizhou in spring. Therefore, the main light supplement stage of the photovoltaic tea garden is the ripening period before the tea trees are picked.

[0050] The installation of photovoltaic panels blocks some natural light, resulting in a decrease in light intensity within the tea garden, particularly during winter or cloudy weather. The shading effect of photovoltaic panels also alters the spectral composition of light, reducing the proportion of ultraviolet and blue light, which is detrimental to tea plantation growth and quality. Therefore, supplementing tea trees with blue-violet light in photovoltaic tea gardens can help increase tea yields, produce tea with a higher concentration of theanine, and ultimately, achieve higher-quality tea products.

[0051] The use of plant fill-in lights can supplement the lack of light caused by photovoltaic shading in tea gardens. There are many types of fill-in lights on the market, including LED lamps, fluorescent lamps, high-pressure sodium lamps, etc.; considering the cost of using large-scale photovoltaic tea gardens, LED lamps have the advantages of adjustable spectrum, low energy consumption, and long service life, which are very suitable for fill-in lighting in photovoltaic tea gardens; therefore, the present invention uses LED lamps as the corresponding light source for fill-in lighting. The number of LED light sources is set according to the location of the photovoltaic facilities to ensure a uniform light output layout, and top lighting, side lighting or oblique lighting can be used for irradiation. The spectrum of LED lamps is adjustable, and a light source with a specific spectrum can be obtained. At the same time, LED lamps can be assembled into various forms of lamps as needed, including but not limited to straight tube lamps, ring lamps, projection lamps, etc. The LED light source can be used alone or in conjunction with an existing light source.

[0052] The present invention uses an LED light source to generate light quality, combined with a supplementary light method, and through precise and specific wavelength matching and light intensity ratio matching, it can effectively improve the quality of tea leaves and has a significant effect on increasing the yield and quality of tea plants. In addition, the LED light source has the characteristics of long service life and low energy consumption. At the same time, the LED light source technology is mature, the production cost is low, and it has a relative advantage in large-scale use. For the field of supplementary light for agricultural planting, it can provide effective illumination and has a very significant effect. Different crops have different requirements for meteorological conditions such as light, temperature, and humidity. Tea trees, as light-loving plants, do not like direct sunlight. The construction of photovoltaic panels provides shade for tea trees. At the same time, when the external light intensity is insufficient, the LED light source is a powerful supplement. The electricity used by the LED light source comes from the power generation of photovoltaic facilities, while the electricity of photovoltaic equipment comes from daytime solar energy. The organic combination of LED light source and photovoltaic facilities effectively distributes the natural solar energy over a longer period of time, making it more effectively utilized by tea trees, increasing the photosynthetic time of tea trees, and being more environmentally friendly and green.

[0053] The following is an analysis example of the present invention:

[0054] Example 1

[0055] 1. Place the white light source below the photovoltaic panels in the photovoltaic tea garden, 1.5 meters above the tea tree canopy. Use top illumination. Install 4 LED light sources (providing white light sources) on a 4×10m photovoltaic panel. Each light source is 2.5m apart. Adjust the light source projection angle to make the light field evenly distributed. The photovoltaic panel is built at a height of 2.6m.

[0056] 2. 30 days before tea picking, when the ambient light intensity is lower than 200 μmol·m -2 ·s -1 When the white light source is turned on, the light intensity of the tea tree canopy reaches 20 μmol·m -2 ·s -1 The supplementary lighting time range is from 5 to 21 o'clock every day, and the supplementary lighting should be stopped 2 days before picking.

[0057] In this embodiment, routine management such as water and fertilizer management, weeding, and pest control are all carried out normally during the growth period of the tea trees; the ambient light intensity refers to the light intensity below the photovoltaic panel.

[0058] In this example, the canopy light intensity is 20 μmol·m -2 ·s -1 The white light is used as fill light processing, recorded as CK-20.

[0059] Example 2

[0060] Compared with Example 1, the white light source in this embodiment is replaced by a yellow-orange light source, and other conditions are the same as those in Example 1; that is, in this embodiment, the canopy light intensity is 20 μmol·m -2 ·s -1 The yellow-orange light is used as fill light processing, recorded as HC-20.

[0061] Example 3

[0062] Compared with Example 1, this embodiment replaces the white light source with a blue-violet light source, and adjusts the intensity of the blue-violet light source to a light intensity of 10 μmol·m -2 ·s -1 , other conditions are the same as those in Example 1; that is, in this example, the canopy light intensity is 10 μmol·m -2 ·s -1 The blue-violet light is used as fill light processing, recorded as NZ-10.

[0063] Example 4

[0064] Compared with Example 1, the white light source in this embodiment is replaced by a blue-violet light source, and other conditions are the same as those in Example 1; that is, in this embodiment, the canopy light intensity is 20 μmol·m -2 ·s -1 The blue-violet light is used as fill light processing, recorded as NZ-20.

[0065] Example 5

[0066] Compared with Example 1, this embodiment replaces the white light source with a blue-violet light source, and adjusts the intensity of the blue-violet light source to a light intensity of 30 μmol·m -2 ·s -1 , other conditions are the same as those in Example 1; that is, in this example, the canopy light intensity is 30 μmol·m -2 ·s -1 The blue-violet light is used for fill light processing, recorded as NZ-30.

[0067] Comparative Example 1

[0068] Compared with Example 1, this comparative example omitted the supplementary lighting of the white light source, and other conditions were the same as those of Example 1; that is, this comparative example did not perform supplementary lighting in the photovoltaic tea garden, and was recorded as CK-A.

[0069] Analysis example 1

[0070] The test results of each embodiment and comparative example are shown in the following table.

[0071] Grouping Advance germination time / d <![CDATA[New shoot bud density / number per 0.01 m 2 > One bud, two leaves, 100 buds weight / g Theanine / % CK-A 0 68±3 35.84±0.31 3.95±0.12 CK-20 +7 85±2 47.65±0.25 4.63±0.21 HC-20 +5 81±2 42.92±0.18 3.47±0.14 NZ-10 +5 76±3 40.46±0.29 5.34±0.19 NZ-20 +5 80±3 43.39±0.33 6.28±0.09 NZ-30 +6 80±4 43.48±0.18 7.06±0.15

[0072] In the above table: positive numbers for the number of days in advance of the new shoot budding period indicate an advance, with CK-A as the standard, and “0” indicates the same day; theanine / % refers to the mass percentage of theanine in dry tea.

[0073] From the comparison in the above table, it can be seen that supplementary light treatment during the tea tree ripening period before picking can produce corresponding characteristic effects. -2 ·s -1 After the white light supplementary lighting treatment, the germination period of new shoots was advanced by 7 days. At the same time, the density of new shoot buds increased by 25%, the weight of 100 buds with one bud and two leaves increased by 32.95%, and theanine increased by 17.22%. The taste of tea was improved and the quality of tea was enhanced.

[0074] The light intensity of tea tree canopy is 20 μmol·m -2 ·s -1 After the yellow-orange light supplementation treatment, the budding period of new shoots was advanced by 5 days. At the same time, the density of new shoot buds increased by 19.12%, the weight of 100 buds with one bud and two leaves increased by 19.75%, and theanine decreased by 12.15%.

[0075] Applying blue-violet light to tea leaves during the pre-harvest ripening period all produced positive, characteristic effects. There was no significant difference in germination time between the three treatments: NZ-10, NZ-20, and NZ-30. Compared to the unsupplemented CK, germination time was advanced, while compared to white light, germination time was delayed. Furthermore, germination time was no different from that of yellow-orange light. Therefore, supplementing with different light spectra had the same effect on tea germination time, with natural light being more effective in promoting early germination.

[0076] When tea trees were treated with blue-violet light supplementation during the pre-harvest ripening period, the density of new shoot buds and the weight of one bud, two leaves, and one hundred buds showed an increasing trend as the intensity of blue-violet light increased, and then tended to be flat. -2 ·s -1 The value differences are not significant, and are all smaller than the new shoot density and one bud, two leaves, and one hundred bud weight of CK-20. Therefore, supplementary lighting for photovoltaic tea gardens can help increase tea yields in tea gardens, and composite light sources (white light) are the best. This is mainly because the photovoltaic equipment built on the tea gardens reduces the light that the tea trees in the tea gardens can receive, which has a certain impact on the development of the tea trees. At this time, supplementary lighting for the tea gardens is beneficial to the growth and development of the tea trees and can effectively increase the yield of tea trees in the tea gardens.

[0077] The blue-violet light supplementation treatment was applied to tea trees during the pre-picking ripening period. With the increase of the blue-violet light intensity, theanine showed a significant increasing trend. Although blue-violet light is beneficial to the synthesis of theanine in tea trees, the blue-violet spectrum supplementation treatment of photovoltaic tea gardens can effectively increase the theanine content of tea and obtain better quality tea. However, the blue-violet light is too strong, which will affect the synthesis of other substances in tea trees. The blue-violet light intensity reaches 30 μmol·m -2 ·s -1 After that, the density of new shoots and the weight of one bud, two leaves and one hundred buds no longer continue to increase. Therefore, it is very important to supplement the blue-violet light with appropriate light intensity to improve the quality of tea trees in the tea garden. Experiments have shown that when the blue-violet light intensity of the tea tree canopy is 20μmol·m -2 ·s -1 When supplementary light treatment was applied, the sprouting period of new shoots was advanced by 5 days. At the same time, the density of new shoot buds increased by 17.65%, and the weight of 100 buds with one bud and two leaves increased by 21.07%, thereby increasing the tea yield.

[0078] From the above analysis, it can be seen that performing different spectrum supplementary lighting treatment on photovoltaic tea gardens can greatly improve the growth and development of tea trees and the quality of tea leaves. Different light sources have different effects on the yield and quality of tea leaves. When constructing a supplementary lighting method, it is necessary to combine multiple aspects such as photovoltaic panels, tea tree stages, light source influence, and light intensity influence to comprehensively control the supplementary lighting process, so as to maintain the content of theanine while ensuring the yield, and enable the light source to be used reasonably. Based on this, the present invention proposes a supplementary lighting method for improving the quality and increasing the yield of tea trees based on photovoltaic tea gardens.

[0079] The above technical solutions of the present invention are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for improving the quality and increasing the yield of tea trees by supplementing light based on a photovoltaic tea garden, characterized in that: Including steps: S1, obtaining the pre-picking date of the tea trees and analyzing the difference in days between the pre-picking date and the current date; the tea trees are planted in a photovoltaic tea garden; S2, when the difference in days is less than a first preset number of days, triggering a re-cooking instruction; S3, according to the ripening supplement instruction, obtaining time point information within each natural day; when the time point is within a first preset time period of the natural day, collecting ambient light intensity information; when the ambient light intensity is less than the first preset ripening supplement light intensity value, using a first set light source to supplement light to the tea trees; When the ambient light intensity is not less than the first preset ripening light intensity value and less than the second preset ripening light intensity value, a second set light source is used to provide supplementary light to the tea trees; the first preset ripening light intensity value is less than the second preset ripening light intensity value; the first set light source includes one of white light and blue-violet light, and the second set light source includes the other of white light and blue-violet light; When the difference in days is less than a second preset number of days, terminating the re-cooking instruction, the second preset number of days being less than the first preset number of days; Alternatively, when the difference between the actual picking date and the current date is less than the second preset number of days, the ripening instruction is terminated; The step S2 also includes: when the difference in the number of days is not less than the first preset number of days, obtaining information on the time point in each natural day, and when the time point is in the second preset time period of the natural day, collecting ambient light intensity information; when the ambient light intensity is less than the preset growth-promoting light intensity value, using a third light source to supplement light to the tea tree, and the third light source includes white light.

2. The method for improving the quality and increasing the yield of tea trees by supplementing light according to claim 1, characterized in that: The first set light source includes blue-violet light, and the second set light source includes white light.

3. The method for improving the quality and increasing the yield of tea trees by supplementing light according to claim 1, characterized in that: The duration of the second preset period is shorter than the duration of the first preset period.

4. The method for improving the quality and increasing the yield of tea trees by supplementing light according to claim 1, characterized in that: The preset growth-promoting light intensity value is less than the first preset ripening-complementing light intensity value.

5. The method for improving the quality and increasing the yield of tea trees by supplementing light according to claim 1, characterized in that: The first preset number of days is selected from 25-45 days.

6. The method for improving the quality and increasing the yield of tea trees by supplementing light according to any one of claims 1 to 5, characterized in that: The wavelength of blue-violet light is 430nm, and the irradiation intensity of the tea tree canopy is 8-32 μmol·m -2 ·s -1 .

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