Method for breeding ricefield eels under photovoltaic panel

Abstract

The invention relates to the technical field of ricefield eel culture, in particular to a method for culturing ricefield eel under a photovoltaic panel, which comprises the following steps: arranging a photovoltaic panel in a pond, building a net cage by utilizing gaps of the photovoltaic panel, transplanting aquatic plants before fry stocking, and stocking ricefield eel fry when the coverage rate of the aquatic plants reaches a certain value; an adjusting mechanism is arranged on the photovoltaic panel, the photosynthesis of the aquatic plants is controlled by adjusting the inclination angle of the photovoltaic panel and adjusting the illumination rate and illumination time of the aquatic plants, the photovoltaic panel adjusts the water quality in the pond by controlling the growth and coverage rate of the aquatic plants, and a monitoring mechanism for monitoring the water quality condition is arranged in the pond; and the monitoring mechanism and the adjusting mechanism are powered by a photovoltaic panel. The water quality is improved through alternanthera philoxeroides, the photovoltaic panel shields sunlight to control the alternanthera philoxeroides to conduct photosynthesis, excessive breeding of the alternanthera philoxeroides is avoided, the photovoltaic panel generates power to supply power to the photovoltaic panel adjusting mechanism and the water quality monitoring mechanism, water quality monitoring and control are achieved, and the survival rate of ricefield eel breeding is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of rice field eel breeding, in particular to a method for breeding rice field eels under a photovoltaic panel. Background Art

[0002] Yellow eel, also known as eel, belongs to the genus Yellow eel of the order Synbranchidae. It has attracted much attention due to its delicious meat and rich nutritional value. In recent years, due to overfishing and destruction of natural habitats, the wild resources of yellow eel have become increasingly scarce. As an emerging freshwater economic fish, the development of artificial breeding of yellow eel is an inevitable trend.

[0003] In the breeding environment, eels need good water quality conditions to ensure their healthy growth. Deterioration of water quality will have a significant negative impact on eels. In a poor water quality environment, the survival and growth of eels will be seriously threatened. For example, deterioration of water quality may lead to reduced feeding and sudden death of eels. In hot weather, the presence of oil film on the water surface will also affect the living environment of eels, increase breeding costs and management difficulties. Therefore, in order to ensure the survival rate of eel breeding, we propose a method for eel breeding under photovoltaic panels. Summary of the invention

[0004] The purpose of the present invention is to provide a method for breeding yellow eels under photovoltaic panels to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for breeding yellow eel under photovoltaic panels, comprising the following steps:

[0006] Photovoltaic panels are installed in the ponds, and cages are built in the gaps between the panels. Aquatic plants are transplanted before seedlings are released. When the coverage of aquatic plants reaches a certain value, yellow eel seedlings are released.

[0007] An adjusting mechanism is arranged on the photovoltaic panel, which adjusts the illumination rate and illumination time of the aquatic plants and controls the photosynthesis of the aquatic plants by adjusting the inclination angle of the photovoltaic panel. The photovoltaic panel adjusts the water quality in the pond by controlling the growth and coverage rate of the aquatic plants. A monitoring mechanism for monitoring the water quality is arranged in the pond, and both the monitoring mechanism and the adjusting mechanism are powered by the photovoltaic panel.

[0008] Preferably, the aquatic plants are water peanuts, and the monitoring mechanism is used to monitor the coverage rate of the water peanuts in the pond; when it is monitored that the coverage rate of the water peanuts exceeds the maximum set value, the inclined photovoltaic panels are leveled to prevent the water peanuts from photosynthesis to the greatest extent, thereby inhibiting their growth;

[0009] When it is monitored that the coverage rate of water peanuts is lower than the minimum set value, the inclined photovoltaic panels will be adjusted to a vertical state to maximize the photosynthesis of water peanuts, thereby promoting their growth. The water quality in the pond is controlled by automatically adjusting the coverage rate of water peanuts.

[0010] Preferably, when the coverage rate of the water peanut exceeds 50%, the yellow eel seedlings are stocked, and when the coverage rate of the water peanut exceeds 90%, their growth begins to be inhibited.

[0011] Preferably, the monitoring mechanism is used to monitor the water temperature in the pond and adjust the water temperature through a temperature control device. Specifically, when the water temperature is higher than a set value, the water temperature is lowered through a water circulation path; when the water temperature is lower than the set value, it is heated by an electric heating rod. The temperature control device is powered by a photovoltaic panel, and the temperature control device adjusts the dissolved oxygen content and the solubility of carbon dioxide in the water by adjusting the water temperature to control the water quality of the pond.

[0012] Preferably, the temperature control device adjusts the inclination angle of the photovoltaic panel through an adjusting mechanism to adjust the illumination rate and illumination time of the pond water surface, and then controls the water quality of the pond by controlling the water temperature and adjusting the dissolved oxygen content and the solubility of carbon dioxide in the water.

[0013] Preferably, the monitoring mechanism is used to monitor the pH value of the pond water and control the pH value of the water through a pH value regulating mechanism. Specifically, when the pH value of the water is lower than 6.5, quicklime is sprayed through an automatic spraying mechanism to increase the pH value; when the pH value of the water is higher than 8.0, an organic acid preparation is sprayed through an automatic spraying mechanism to lower the pH value.

[0014] Preferably, the photovoltaic panels are controlled in sections, wherein one part of the photovoltaic panels is adjusted in angle using an adjustment mechanism, while the other part is not adjusted or is adjusted to other angles, so that the water body forms temperature zones to meet the water temperature requirements of eels at different growth stages.

[0015] Preferably, after the water body is divided into zones, a portion of the water area is controlled at 20-25°C to adapt to the growth of juvenile eels, and another portion of the water area is controlled at 25-30°C to adapt to the growth of adult eels.

[0016] Preferably, the monitoring mechanism is used to monitor the oxygen content of the pond water, and the oxygen content of the water is controlled by adjusting the water temperature and an aerator.

[0017] Preferably, a growth lamp is provided on the bracket of the photovoltaic panel, and the growth lamp is used to supplement the time of insufficient sunlight, and the monitoring mechanism is used to detect the lighting time of the pond.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention absorbs ammonia nitrogen, feed dissolved matter and other organic substances in the water body through water peanuts, which helps to reduce the nutrient salts in the water body, thereby changing the water quality from rich to thin and keeping it fresh; the photovoltaic panels block the sunlight to control the water peanuts to carry out photosynthesis, thereby inhibiting their growth and avoiding their excessive reproduction; at the same time, the photovoltaic panels generate electricity to power the photovoltaic panel adjustment mechanism and the water quality monitoring mechanism, so as to realize water quality monitoring and control and ensure the survival rate of eel farming.

[0019] It also avoids the problem that aquaculture farms are often located in remote areas with complex terrain, and that traditional power supply methods require a large amount of materials such as cables, wires and distribution equipment, and the cost of building power supply facilities is high. At the same time, it saves electricity costs and reduces energy storage equipment. DETAILED DESCRIPTION

[0020] 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.

[0021] The present invention provides a technical solution:

[0022] Embodiment 1:

[0023] A method for breeding yellow eels under photovoltaic panels comprises the following steps:

[0024] Install photovoltaic panels in the pond and use the gaps between the panels to build cages. Transplant aquatic plants before stocking the seedlings. When the coverage of aquatic plants exceeds 50%, the eel seedlings can be stocked.

[0025] An adjusting mechanism is arranged on the photovoltaic panel, which adjusts the illumination rate and illumination time of the aquatic plants and controls the photosynthesis of the aquatic plants by adjusting the inclination angle of the photovoltaic panel. The photovoltaic panel adjusts the water quality in the pond by controlling the growth and coverage rate of the aquatic plants. A monitoring mechanism for monitoring the water quality is arranged in the pond, and both the monitoring mechanism and the adjusting mechanism are powered by the photovoltaic panel.

[0026] The photovoltaic panel adjustment mechanism is a device used to adjust the angle of the photovoltaic panel. It collects environmental data through sensors, such as the current time, geographical location, position and angle of the sun, etc. Based on the data collected by the sensor and the water quality obtained by the monitoring mechanism, the optimal angle of the photovoltaic panel under the current conditions is calculated. The position of the photovoltaic panel is accurately adjusted according to the calculated optimal angle through the driving mechanism.

[0027] Among them, the breeding pond area is more than 30 mu, the water depth is 1.5-2.0m, the slope ratio is 1:1.5, the pond bottom is flat, and the silt is 10-15cm. A "fishway" needs to be dug on the edge of the pond parallel to the photovoltaic panels, with a width of 1.5m and 1m lower than the pond bottom. The slope ratio of the inner wall of the "fishway" is preferably 2:1. The water source is convenient and easy to drain and irrigate, the water source is of good quality and pollution-free, the transportation is convenient and easy to transport, and it is sheltered from the wind and facing the sun to prevent theft.

[0028] The specifications of the eel breeding cages are 1mx4mx1.5m. The cages are arranged in a "one" shape, parallel to each row of photovoltaic panels, and set at an equal distance from the two rows of photovoltaic panels. 15 to 20 cages are set per mu, with a spacing of 0.5-1m between the cages, more than 0.4m from the bottom of the pond, and more than 3m from the pond bank, which is convenient for small boats to navigate, manage and feed. The cages are erected with frameless plug-in poles. That is, piles are driven at the four corners of the cage to form a support frame to fix the upper and lower four corners of the cage on wooden or bamboo piles to achieve the purpose of tightening the cage body, and the height of the cage body is more than 15 to 30% above the water surface.

[0029] The area occupied by photovoltaic panels shall not exceed 52.69% of the total pond area. Photovoltaic panels shall adopt a fixed single-row bracket scheme. The spacing between pile columns shall not be less than 4m, the spacing between rows shall not be less than 8m, the distance between the outermost row of piles and the ridge shall not be less than 6m, and the lowest point of the photovoltaic module shall not be less than 2m from the water surface.

[0030] Embodiment 2:

[0031] On the basis of Example 1, the waterweed adopts water peanut, which can absorb organic substances such as ammonia nitrogen and feed dissolved matter in the water body, which helps to reduce the nutrient salts in the water body, thereby making the water quality change from fat to thin and keep it fresh. Secondly, water peanut can also effectively remove nutrient salts such as total nitrogen and total phosphorus in the water body, and has a significant purification effect on eutrophic water bodies. In addition, water peanut has an inhibitory effect on the growth of cyanobacteria and the synthesis of microcystin, can increase the species diversity of algae, and at the same time increase the density of zooplankton, causing the population succession of phytoplankton and zooplankton, which helps to improve the ecological balance of water bodies.

[0032] Due to its strong vitality and rapid reproduction ability, water peanuts tend to form dense communities in water bodies and wet land, affecting water quality and ecological balance. In order to effectively manage water peanuts and avoid their overgrowth, monitoring agencies use cameras to monitor the coverage rate of water peanuts in ponds.

[0033] When it is monitored that the coverage rate of water peanut exceeds the maximum set value, the inclined photovoltaic panels are leveled to prevent the water peanut from photosynthesis to the greatest extent, thereby inhibiting its growth;

[0034] When it is monitored that the coverage rate of water peanuts is lower than the minimum set value, the inclined photovoltaic panels will be adjusted to a vertical state to maximize the photosynthesis of water peanuts, thereby promoting their growth. The water quality in the pond is controlled by automatically adjusting the coverage rate of water peanuts.

[0035] When the coverage rate of water peanuts exceeds 50%, the eel seedlings are stocked, and when the coverage rate of water peanuts exceeds 90%, their growth begins to be inhibited. The coverage rate of water peanuts is preferably 80% of the cage area, which can provide a good ecological environment for eels. The rapid reproduction and developed root system of water peanuts help to maintain a constant temperature of the water body, especially in summer, it can provide a cool place for eels to escape the heat, and in winter, the roots of water peanuts help to keep warm, providing a safe wintering place for eels.

[0036] Embodiment three:

[0037] On the basis of the second embodiment, the monitoring mechanism is also used to monitor the water temperature in the pond and adjust the water temperature through the temperature control device. The fluctuation of water temperature directly affects the dissolved oxygen content and the solubility of other harmful gases, thereby changing the entire water ecosystem. The increase in water temperature will cause the dissolved oxygen content to decrease, and the solubility of other harmful gases will also change, which will have a profound impact on the aquatic ecosystem.

[0038] The increase in water temperature will cause the gap between water molecules to decrease, making it difficult for oxygen molecules to enter the water, resulting in a decrease in dissolved oxygen content. On the contrary, when the water temperature is low, the gap between water molecules increases, oxygen molecules are more easily dissolved in water, and the dissolved oxygen content is higher. Therefore, under high temperature conditions in summer, water bodies are prone to hypoxia. Secondly, water temperature fluctuations will also affect the solubility of other harmful gases. Rising water temperature will reduce the solubility of oxygen in water, and will also affect the solubility of other harmful gases. For example, the solubility of carbon dioxide will also decrease with the increase in water temperature, which may lead to acidification of water bodies and have adverse effects on aquatic organisms. Finally, water temperature fluctuations change the entire water ecosystem by affecting the dissolved oxygen content and the solubility of other harmful gases. The reduction of dissolved oxygen will cause hypoxia in aquatic organisms, affecting their survival and reproduction; the increase of harmful gases may pollute the water body and destroy the ecological balance.

[0039] This embodiment uses a thermometer or other temperature measuring device to monitor. When the water temperature is higher than 30°C, the water temperature is lowered through the water circulation path. During micro-flow aquaculture, the water flow rate is controlled within 0.2m / s. When the water temperature is lower than 20°C, it is heated by an electric heating rod, and the temperature control device is powered by a photovoltaic panel. The temperature control device adjusts the water temperature, the dissolved oxygen content in the water and the solubility of carbon dioxide to control the water quality of the pond.

[0040] In addition, low water temperature will directly affect the appetite of eels. When the water temperature is below 10℃, they will stop eating and enter hibernation as the temperature drops. High water temperature will also affect the health of eels. When the water temperature exceeds 30℃, the eels will become sluggish and stop eating. Long-term high or low temperature may even cause the death of eels.

[0041] The temperature control device adjusts the tilt angle of the photovoltaic panel through an adjustment mechanism to adjust the illumination rate and illumination time of the pond water surface, and then controls the water temperature to adjust the dissolved oxygen content and the solubility of carbon dioxide in the water to control the pond water quality and ensure the healthy diet of the eels.

[0042] Embodiment 4:

[0043] Based on Example 3, the monitoring mechanism is also used to monitor the pH value of the pond water and control the pH of the water through the pH adjustment mechanism. The monitoring mechanism uses a pH sensor. Too high or too low pH values ​​will have a significant impact on the growth, feeding and survival of eels.

[0044] This embodiment closely monitors the pH value of the water body through the pH sensor and takes necessary measures to keep the pH value within an appropriate range to promote the healthy growth and reproduction of eels. Specifically, when the pH value of the water body is lower than 6.5, quicklime is sprayed through the automatic spraying mechanism to increase the pH value, and when the pH value of the water body is higher than 8.0, an organic acid preparation is sprayed through the automatic spraying mechanism to lower the pH value.

[0045] Embodiment five:

[0046] On the basis of Example 4, the photovoltaic panels are controlled in sections, in which one part of the photovoltaic panels is adjusted at an angle using an adjustment mechanism, while the other part is not adjusted or adjusted to other angles, so that the water body forms temperature zones to meet the water temperature requirements of eels at different growth stages. This embodiment is an effective method for segmented breeding, which can meet the water temperature requirements of different growth stages. Eels in the seedling stage are suitable for growth in water temperatures of 20-25°C, while adult eels prefer an environment of 25-30°C. By dividing the breeding area into different temperature zones, optimal growth conditions can be provided for eels of all ages. This embodiment is not only conducive to improving the overall breeding efficiency, but also effectively controls the risk of disease transmission, ensuring that eels at each growth stage can obtain the best growth environment.

[0047] Embodiment six:

[0048] Based on the fifth embodiment, the monitoring mechanism is used to monitor the oxygen content of the pond water body, and the oxygen content of the water body is controlled by adjusting the water temperature and the oxygenator. The monitoring mechanism includes a dissolved oxygen sensor, which uses electrochemical or optical principles to quickly and continuously measure the dissolved oxygen concentration in the water body, and transmits the data to the cloud platform to achieve remote monitoring and data analysis. The oxygen content of the water body is kept above 3 mg / L of dissolved oxygen.

[0049] A growth lamp is provided on the bracket of the photovoltaic panel, and the growth lamp is used to supplement the time when the sunlight is insufficient, and the monitoring mechanism is used to detect the lighting time of the pond. The eel growth lamp adopts an LED light source, which has the advantages of energy saving, long life, and adjustable light intensity. The LED light source simulates natural light, provides appropriate light intensity and spectrum, and promotes the growth and development of eels. Appropriate lighting conditions can improve the appetite and digestion ability of eels, promote the growth and development of eels, and thus improve breeding efficiency. Appropriate lighting conditions can improve the immunity of eels and reduce the occurrence of diseases. The LED light source is installed on the photovoltaic panel bracket, about 30-50 cm from the water surface. The lighting time and light intensity of the eel growth lamp are adjusted according to the growth stage and breeding environment of the eel. The light intensity is controlled between 1000-2000 lux, and the lighting time is controlled between 12-16 hours. If there is sufficient sunlight, there is no need to use growth lamps. The sensors of the photovoltaic panels can monitor the position and angle of the sun, and can also obtain the exposure time of the photovoltaic panels, and then obtain the time the eels are exposed to sunlight.

[0050] Comparative Example 1:

[0051] The combination of traditional eel farming and fish pond oxygenation photovoltaic system uses photovoltaic power generation to power the oxygenation equipment, which reduces the farming cost, but the farming time is about 8-10 months and the eel survival rate is 60-70%.

[0052] The present invention absorbs organic substances such as ammonia nitrogen and feed dissolved matter in the water body through water peanuts, which helps to reduce the nutrient salts in the water body, thereby making the water quality change from fat to thin and keeping it fresh. The photovoltaic panels block the sunlight to control the water peanuts to perform photosynthesis, thereby inhibiting their growth and avoiding their over-breeding. At the same time, the photovoltaic panels generate electricity to power the photovoltaic panel's regulating mechanism and the water quality monitoring mechanism to achieve water quality monitoring and control, ensure the survival rate of the eel farming, and effectively avoid water body hypoxia, pH imbalance, excessive toxic substances, etc., which lead to slow growth, decreased immunity, and even death of the eel. The eel farmed by the technical solution of the present invention only needs 5 months at the shortest, and is controlled at 5-8 months on average. The survival rate of the eel is increased to more than 95%, and various automation equipment and monitoring sensors all use solar power generation, which reduces the cost of farming. In addition, outside the cage, the water surface can be fully utilized to match economic fish such as silver carp and bighead carp to increase additional income.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for breeding yellow eel under photovoltaic panels, characterized in that: The steps include: Photovoltaic panels are installed in the ponds, and cages are built in the gaps between the panels. Aquatic plants are transplanted before seedlings are released. When the coverage of aquatic plants reaches a certain value, yellow eel seedlings are released. An adjusting mechanism is arranged on the photovoltaic panel, which adjusts the illumination rate and illumination time of the aquatic plants and controls the photosynthesis of the aquatic plants by adjusting the inclination angle of the photovoltaic panel. The photovoltaic panel adjusts the water quality in the pond by controlling the growth and coverage rate of the aquatic plants. A monitoring mechanism for monitoring the water quality is arranged in the pond, and both the monitoring mechanism and the adjusting mechanism are powered by the photovoltaic panel.

2. The method for breeding yellow eel under photovoltaic panels according to claim 1, characterized in that: The aquatic plants are water peanuts, and the monitoring mechanism is used to monitor the coverage rate of the water peanuts in the pond; when it is monitored that the coverage rate of the water peanuts exceeds the maximum set value, the inclined photovoltaic panels are leveled to prevent the water peanuts from photosynthesis to the greatest extent, thereby inhibiting their growth; When it is monitored that the coverage rate of water peanuts is lower than the minimum set value, the inclined photovoltaic panels will be adjusted to a vertical state to maximize the photosynthesis of water peanuts, thereby promoting their growth. The water quality in the pond is controlled by automatically adjusting the coverage rate of water peanuts.

3. The method for breeding yellow eel under photovoltaic panels according to claim 2, characterized in that: When the coverage rate of the water peanut exceeds 50%, the yellow eel seedlings are released; when the coverage rate of the water peanut exceeds 90%, the growth of the yellow eel begins to be inhibited.

4. The method for breeding yellow eel under photovoltaic panels according to claim 2, characterized in that: The monitoring mechanism is used to monitor the water temperature in the pond and adjust the water temperature through a temperature control device. Specifically, when the water temperature is higher than the set value, the water temperature is lowered through a water circulation path; when the water temperature is lower than the set value, it is heated by an electric heating rod. The temperature control device is powered by a photovoltaic panel, and the temperature control device adjusts the dissolved oxygen content and the solubility of carbon dioxide in the water by adjusting the water temperature to control the water quality of the pond.

5. The method for breeding yellow eel under photovoltaic panels according to claim 4, characterized in that: The temperature control device adjusts the inclination angle of the photovoltaic panel through the adjustment mechanism to adjust the illumination rate and illumination time of the pond water surface, and then controls the water quality of the pond by controlling the water temperature, adjusting the dissolved oxygen content and the solubility of carbon dioxide in the water.

6. The method for breeding yellow eel under photovoltaic panels according to claim 5, characterized in that: The monitoring mechanism is used to monitor the pH value of the pond water and control the pH value of the water through the pH value regulating mechanism. Specifically, when the pH value of the water is lower than 6.5, quicklime is sprayed through the automatic spraying mechanism to increase the pH value. When the pH value of the water is higher than 8.0, an organic acid preparation is sprayed through the automatic spraying mechanism to lower the pH value.

7. The method for breeding yellow eel under photovoltaic panels according to claim 5, characterized in that: The photovoltaic panels are controlled in sections, wherein one part of the photovoltaic panels is adjusted in angle by an adjustment mechanism, while the other part is not adjusted or is adjusted to other angles, so that the water body forms temperature zones to meet the water temperature requirements of the eels at different growth stages.

8. The method for breeding yellow eel under photovoltaic panels according to claim 7, characterized in that: After the water body is divided into two zones, the temperature of one part of the water area is controlled at 20-25°C to adapt to the growth of eels in the seedling stage, and the temperature of the other part of the water area is controlled at 25-30°C to adapt to the growth of adult eels.

9. The method for breeding yellow eel under photovoltaic panels according to claim 1, characterized in that: The monitoring mechanism is used to monitor the oxygen content of the pond water and control the oxygen content of the water by adjusting the water temperature and the aerator.

10. The method for breeding yellow eel under photovoltaic panels according to claim 1, characterized in that: A growth lamp is arranged on the bracket of the photovoltaic panel, and the growth lamp is used to supplement the time when the sunshine is insufficient, and the monitoring mechanism is used to detect the lighting time of the pond.