Agricultural microalgae fertilizer in-situ manufacturing and applying device and method

Abstract

The invention discloses an agricultural microalgae fertilizer in-situ manufacturing and applying device and method, and belongs to the field of microbial fertilizer manufacturing, the device comprises a first box body, the first box body is filled with a culture solution and microalgae, the first box body is communicated with a supplement pipe, the side wall of the first box body is provided with a plurality of overflow small holes, and the overflow small holes are communicated with the supplement pipe; the supplementing pipe can supplement a culture solution into the first box body, the supplementing pipe injects the culture solution into the first box body, and when the liquid level of the culture solution reaches the overflow small hole, the culture solution containing microalgae flows out to the soil, and when injection of the culture solution into the first box body is stopped, the microalgae remaining in the first box body continues to grow; the device is easy and convenient to operate, efficient preparation and application of the microalgae fertilizer can be achieved on the premise that the activity of microalgae cells is not damaged, the manufacturing and transportation cost of the microalgae fertilizer can be greatly reduced, the utilization efficiency of the fertilizer can be improved, and healthy growth of crops can be promoted.

Description

Technical Field

[0001] The invention relates to the technical field of microbial fertilizer manufacturing, and in particular to an in-situ manufacturing and application device and method for agricultural microalgae fertilizer. Background Art

[0002] With the increasing global attention to sustainable agriculture and environmental protection, traditional fertilizers have been increasingly questioned due to their inefficient use and environmental pollution. These problems include soil acidification, water eutrophication, and greenhouse gas emissions caused by excessive use of fertilizers. In order to meet these challenges, people are looking for more environmentally friendly and efficient alternatives. Among them, microbial fertilizers, as an emerging agricultural input, have received widespread attention because they can promote soil health, increase crop yields and quality, and reduce negative impacts on the environment.

[0003] As a biological resource rich in various nutrients, microalgae has been widely studied and gradually used as a microbial fertilizer in agricultural production. Microalgae biofertilizers have shown their potential and advantages in modern agriculture with their comprehensive nutrition, unique efficacy, and natural pollution-free characteristics. Microalgae biofertilizers contain a large amount of protein, vitamins, minerals and growth hormones, which can promote plant growth and improve the disease resistance of crops. Studies have shown that microalgae fertilizers can increase the organic matter content of the soil, improve soil structure, and increase the soil's water and fertilizer retention capacity. In addition, microalgae fertilizers can also enhance the antioxidant capacity and stress resistance of plants through their bioactive substances, such as polysaccharides, polyphenols and carotenoids, thereby improving crop yield and quality.

[0004] However, the preparation methods of microalgae fertilizers in the prior art have many shortcomings, such as the need to be carried out in a separate microalgae cultivation factory, which not only has a complicated preparation process and high transportation costs, but also improper storage can easily destroy the endogenous substances in the microalgae cells, affecting the quality and fertilization effect of the fertilizer. In addition, the large-scale cultivation and collection of microalgae also face technical and economic challenges. Summary of the invention

[0005] The purpose of the present invention is to provide an in-situ manufacturing and application device and method for agricultural microalgae fertilizer, which solves the problem that the prior art requires microalgae to be cultivated in a separate factory, resulting in complex preparation and inconvenient transportation, which affects the fertilizer quality and fertilization effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an in-situ manufacturing and application device for agricultural microalgae fertilizer, comprising a first box body, the first box body is filled with culture solution and microalgae, the first box body is connected with a replenishing pipe, a plurality of overflow holes are opened on the side wall of the first box body, the replenishing pipe can replenish culture solution into the first box body, and the replenishing pipe injects culture solution into the first box body and when the culture solution level reaches the overflow holes, the culture solution containing microalgae flows out to the soil, and when the injection of culture solution into the first box body is stopped, the microalgae retained in the first box body continue to grow.

[0007] Preferably, the drainage end of the supplementary pipe is immersed below the liquid surface of the culture liquid in the first tank.

[0008] Preferably, the plurality of overflow holes are located at the same height.

[0009] Preferably, an overflow drip tube is connected to the outer wall of the first box, and the overflow drip tube guides the culture solution containing microalgae flowing out of the overflow hole to the root and stem of the plant.

[0010] Preferably, the top of the first box is covered with a transparent cover.

[0011] Preferably, it further comprises a second box body, wherein the second box body is filled with culture fluid, the second box body is connected with a vertical pipe, the vertical pipe is connected with a horizontal pipe, the horizontal pipe is connected with the supplementary pipe, and the vertical pipe is provided with a valve.

[0012] Preferably, a scraper strip is slidably connected to the upper surface of the transparent cover plate, a first pull rope is connected to the scraper strip, and a rectangular counterweight is connected to the other end of the first pull rope;

[0013] A rectangular box is connected to the side of the first box body, the rectangular counterweight block slides in the rectangular box, a water outlet pipe is connected between the rectangular counterweight block and the scraper strip, a diversion hole connected to the water outlet pipe is opened in the scraper strip, an end of the water outlet pipe away from the scraper strip passes through the rectangular counterweight block and is connected to the rectangular box, and a protrusion is provided at the port of the rectangular box;

[0014] The water outlet pipe is connected to a water replenishment pipe, and the water replenishment pipe is connected to an external high-pressure water source. A three-way valve is provided at the connection between the water outlet pipe and the water replenishment pipe. When the water outlet pipe is connected to the inner cavity of the rectangular box and is not connected to the water replenishment pipe, the rectangular counterweight block slides down under the rectangular box under gravity, so that the water in the rectangular box is discharged from the water outlet pipe, and the rectangular counterweight block pulls the scraper bar to slide on the transparent cover plate, and when the water outlet pipe is connected to the water replenishment pipe and is not connected to the diversion hole on the scraper bar, the high-pressure water source is injected into the rectangular box to cause the rectangular counterweight block to move up and reset.

[0015] Preferably, a sliding column is slidably connected inside the bottom end of the vertical tube, a first spring is connected between the bottom of the sliding column and the bottom end of the vertical tube, a micro cylinder is connected to the upper part of the rectangular counterweight, and an air pipe is connected between the micro cylinder and the lower space of the sliding column;

[0016] The slide column slides at the connection between the vertical pipe and the horizontal pipe. The vertical pipe is connected with a water pump. When water flows in the vertical pipe, the slide column slides down, the vertical pipe is connected with the horizontal pipe, and the micro cylinder extends and drives the three-way valve to change direction.

[0017] Preferably, the side wall of the first box body is connected with a drainage groove, the number of the overflow drip pipes is multiple, and the multiple overflow drip pipes are all connected to the drainage groove and correspond one-to-one to the multiple overflow holes;

[0018] A mounting plate is slidably connected in the drainage groove, a plurality of dredging rods are connected to the mounting plate, the plurality of dredging rods slide in a plurality of overflow drip tubes respectively, and a second spring is connected between the mounting plate and the drainage groove;

[0019] A camshaft is rotatably connected in the drainage groove, the camshaft is fitted with the mounting plate, a torsion spring is connected between the camshaft and the drainage groove, a storage wheel is connected to the end of the camshaft, a second pull rope is connected between the storage wheel and the scraper strip, a guide wheel that cooperates with the second pull rope is rotatably connected to the outer wall of the first box body, and the dredging rod slides back and forth in the overflow drip tube when the scraper strip slides.

[0020] An in-situ production and application method of agricultural microalgae fertilizer comprises the following steps:

[0021] burying the first box into the soil so that the overflow holes face the crops;

[0022] Adding culture solution and microalgae into the first box, and the microalgae grows after being exposed to light;

[0023] According to the time when the crops need fertilizer, the supplementary pipe is controlled to inject the culture solution into the first box, and when the liquid level in the first box rises to the overflow hole position, the culture solution containing microalgae flows out through the overflow hole and fertilizes the crops;

[0024] Stop replenishing the culture solution in the replenishing tube, the liquid level in the first tank no longer rises, and the remaining microalgae in the first tank continue to grow, forming a new batch of microalgae fertilizer;

[0025] Repeat the above steps at the next fertilization opportunity.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention adds culture solution and microalgae to the height of the overflow hole in the first box, and the microalgae grow under the action of light. When it is necessary to fertilize the crops, the supplementary pipe is controlled to supplement the culture solution into the first box, so that the liquid level in the first box rises. After the liquid level rises, the microalgae floating on the liquid surface of the culture solution and part of the culture solution are discharged through the overflow hole to fertilize the crops. The supply of culture solution to the first box by the supplementary pipe is stopped, so that the liquid level in the first box no longer rises, and the culture solution and microalgae are no longer discharged through the overflow hole. At this time, the microalgae remaining in the first box continue to grow as raw materials to prepare for the next fertilization of the crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the first box body of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the supplementary pipe of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a rectangular counterweight block of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the sliding column of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the dredging rod of the present invention;

[0034] Figure 7 is a growth curve diagram of Chlorella vulgaris in the first box of the present invention;

[0035] Figure 8 This is an indication diagram of tomato fruit weight after application of the chlorella fertilizer of the present invention;

[0036] Fig. 9 is a growth curve diagram of the yellow silk algae in the first box of the present invention;

[0037] Fig.10 This is a graph showing the weight index of pepper fruit after application of the yellow silk algae fertilizer of the present invention.

[0038] In the figure: 1. first box body; 11. overflow hole; 12. transparent cover; 2. second box body; 21. vertical pipe; 22. horizontal pipe; 23. replenishing pipe; 3. drainage trough; 31. overflow drip tube; 32. mounting plate; 33. dredging rod; 34. second spring; 35. camshaft; 36. torsion spring; 37. storage wheel; 38. second pull rope; 39. guide wheel; 4. scraper; 41. first pull rope; 42. rectangular counterweight; 43. rectangular box; 44. water outlet pipe; 441. diversion hole; 45. water replenishing pipe; 46. three-way valve; 47. micro cylinder; 48. sliding column; 481. first spring; 49. air pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0040] Example 1, reference Figure 1-Figure 6 , an agricultural microalgae fertilizer in-situ manufacturing and application device, comprising a first box body 1, the first box body 1 is filled with culture solution and microalgae, the first box body 1 is connected with a supplementary pipe 23, the side wall of the first box body 1 is provided with a plurality of overflow holes 11, the supplementary pipe 23 can supplement the culture solution into the first box body 1, and the supplementary pipe 23 injects the culture solution into the first box body 1 and when the culture solution level reaches the overflow holes 11, the culture solution containing the microalgae flows out to the soil, and when the injection of the culture solution into the first box body 1 is stopped, the microalgae remaining in the first box body 1 continues to grow.

[0041] The working mechanism of the in-situ manufacturing and application device for agricultural microalgae fertilizer provided in this embodiment is as follows:

[0042] The first box body 1 is buried in the soil one-third of the way in an inverted trapezoid and fixed. Culture solution and microalgae are added to the first box body 1 to the height of the overflow hole 11. The microalgae grow under the action of light. When it is necessary to fertilize the crops, the supplementary pipe 23 is controlled to supplement the culture solution into the first box body 1, so that the liquid level in the first box body 1 rises. After the liquid level rises, the microalgae floating on the liquid surface of the culture solution and part of the culture solution are discharged through the overflow hole 11 to fertilize the crops. The supply of culture solution to the first box body 1 by the supplementary pipe 23 is stopped, so that the liquid level in the first box body 1 no longer rises, so that the culture solution and microalgae are no longer discharged through the overflow hole 11. At this time, the microalgae remaining in the first box body 1 continue to grow as raw materials to prepare for the next fertilization of the crops.

[0043] Among the optional methods of this embodiment, the more preferred ones are:

[0044] The drainage end of the replenishment pipe 23 is immersed below the liquid level of the culture solution in the first housing 1 .

[0045] The replenishing tube 23 can be placed horizontally below the liquid surface of the first box body 1, or can be inserted vertically below the liquid surface of the first box body 1. When the replenishing tube 23 adds culture solution into the first box body 1, it will not cause a large disturbance to the microalgae on the upper part of the culture solution, thereby ensuring that more microalgae can be discharged from the overflow hole 11.

[0046] Among the optional methods of this embodiment, the more preferred ones are:

[0047] The plurality of overflow holes 11 are located at the same height.

[0048] By arranging the plurality of overflow holes 11 at the same height, the plurality of overflow holes 11 can discharge the culture solution containing microalgae at the same time to fertilize the crops.

[0049] Among the optional methods of this embodiment, the more preferred ones are:

[0050] The outer wall of the first box body 1 is connected with an overflow drip tube 31, and the overflow drip tube 31 guides the culture solution containing microalgae flowing out of the overflow hole 11 to the root and stem of the plant.

[0051] The culture solution containing microalgae flowing out of the overflow hole 11 can enter the overflow drip tube 31, and the overflow drip tube 31 is directed toward the rhizome of the plant, thereby guiding the microalgae fertilizer so that the microalgae fertilizer is directionally applied to the rhizome of the plant.

[0052] Among the optional methods of this embodiment, the more preferred ones are:

[0053] The top of the first box body 1 is covered with a transparent cover plate 12 .

[0054] By covering the top of the first box body 1 with a transparent cover plate 12, debris will not fall into the first box body 1, while ensuring light transmittance, so that the growth of microalgae is not affected.

[0055] Among the optional methods of this embodiment, the more preferred ones are:

[0056] The second box body 2 is also included. The second box body 2 is filled with culture fluid. The second box body 2 is connected with a vertical pipe 21. The vertical pipe 21 is connected with a horizontal pipe 22. The horizontal pipe 22 is connected with a supplementary pipe 23. A valve is arranged on the vertical pipe 21.

[0057] The second box 2 is filled with tap water, and different inorganic nutrients are added to the tap water to prepare a nutrient solution according to different microalgae growth requirements. The valve on the vertical pipe 21 is opened, and the culture solution in the second box 2 flows into the first box 1 through the vertical pipe 21, the horizontal pipe 22 and the supplementary pipe 23.

[0058] Among the optional methods of this embodiment, the more preferred ones are:

[0059] The upper surface of the transparent cover plate 12 is slidably connected with a scraper strip 4, and a first pull rope 41 is connected to the scraper strip 4, and the other end of the first pull rope 41 is connected to a rectangular counterweight block 42; a rectangular box 43 is connected to the side of the first box body 1, and the rectangular counterweight block 42 slides in the rectangular box 43, and a water outlet pipe 44 is connected between the rectangular counterweight block 42 and the scraper strip 4, and a diversion hole 441 connected to the water outlet pipe 44 is opened in the scraper strip 4, and the end of the water outlet pipe 44 away from the scraper strip 4 passes through the rectangular counterweight block 42 and is connected to the rectangular box 43, and a protrusion is provided at the port of the rectangular box 43; a water supply pipe 44 is connected to the water outlet pipe 44. Tube 45, the water supply pipe 45 is connected to an external high-pressure water source, and a three-way valve 46 is provided at the connection between the water outlet pipe 44 and the water supply pipe 45. When the water outlet pipe 44 is connected to the inner cavity of the rectangular box 43 and is not connected to the water supply pipe 45, the rectangular counterweight block 42 slides down under the rectangular box 43 under gravity, so that the water in the rectangular box 43 is discharged from the water outlet pipe 44, and the rectangular counterweight block 42 pulls the scraper strip 4 to slide on the transparent cover plate 12, and when the water outlet pipe 44 is connected to the water supply pipe 45 and is not connected to the diversion hole 441 on the scraper strip 4, the high-pressure water source is injected into the rectangular box 43 to make the rectangular counterweight block 42 move up and reset.

[0060] When the culture fluid is replenished into the first box body 1, the three-way valve 46 is operated at the same time and cuts off the connection between the outlet pipe 44 and the water supply pipe 45. At this time, the space in the rectangular box 43 is connected with the diversion hole 441 on the scraper 4 through the outlet pipe 44. At this time, the rectangular counterweight block 42 slides down in the rectangular box 43 under the action of gravity. At this time, the clean water in the rectangular box 43 is squeezed and flows from the outlet pipe 44 to the diversion hole 441 and is discharged to the upper surface of the transparent cover plate 12. When the rectangular counterweight block 42 moves down, the first pull rope 41 pulls the scraper 4 to slide on the transparent cover plate 12, so that the transparent The cover plate 12 is cleaned to ensure its light transmittance so that the microalgae can receive light normally for growth. After the culture medium is replenished, the three-way valve 46 is operated and the connection between the rectangular box 43 and the diversion hole 441 is cut off. At this time, the water supply pipe 45 is connected to the rectangular box 43 through the outlet pipe 44, so that high-pressure water is supplied to the rectangular box 43, so that the rectangular counterweight block 42 moves up to the port of the rectangular box 43 and is blocked by the protrusion of the port of the rectangular box 43. At this time, water is no longer replenished into the rectangular box 43, and the rectangular counterweight block 42 no longer moves, preparing for the next cleaning of the transparent cover plate 12.

[0061] Among the optional methods of this embodiment, the more preferred ones are:

[0062] A sliding column 48 is slidably connected inside the bottom end of the vertical pipe 21, a first spring 481 is connected between the bottom of the sliding column 48 and the bottom end of the vertical pipe 21, a micro cylinder 47 is connected to the upper part of the rectangular counterweight 42, and an air pipe 49 is connected between the micro cylinder 47 and the lower space of the sliding column 48; the sliding column 48 slides at the connection between the vertical pipe 21 and the horizontal pipe 22, and a water pump is connected to the vertical pipe 21. When water flows in the vertical pipe 21, the sliding column 48 slides down, the vertical pipe 21 is connected with the horizontal pipe 22, and the micro cylinder 47 extends and drives the three-way valve 46 to change direction.

[0063] The flow of the culture solution in the vertical pipe 21 is driven by the water pump. When the culture solution flows, it first impacts the sliding column 48, causing the sliding column 48 to move downward. After the sliding column 48 moves downward to the lower part of the connecting part between the vertical pipe 21 and the horizontal pipe 22, the culture solution can flow into the horizontal pipe 22 through the vertical pipe 21. At this time, the culture solution is replenished in the first box body 1, and when the sliding column 48 slides down, the first spring 481 is pressed, so that the air under the sliding column 48 is discharged into the micro cylinder 47 through the air pipe 49, so that the micro cylinder 47 is extended. When the micro cylinder 47 is extended, the three-way valve 46 is driven to operate. When the water pump stops running, the pressure in the vertical pipe 21 is restored, and the first spring 481 pushes the sliding column 48 back to its original position. At this time, the air in the micro cylinder 47 flows back, so that the micro cylinder 47 is shortened, so that the three-way valve 46 is restored to its initial state.

[0064] The micro cylinder 47 and the three-way valve 46 can be coordinated through gears and racks. The rack is connected to the output end of the micro cylinder 47, and the gear is connected to the valve stem of the three-way valve 46, so that the extension and contraction of the micro cylinder 47 can drive the valve stem of the three-way valve 46 to rotate. In addition, the valve core of the three-way valve 46 can also be directly connected to the output end of the micro cylinder 47, so that the extension and contraction of the micro cylinder 47 directly drives the valve core of the three-way valve 46 to move, thereby changing its opening and closing direction.

[0065] Among the optional methods of this embodiment, the more preferred ones are:

[0066] The side wall of the first box body 1 is connected with a drainage groove 3, and there are multiple overflow drippers 31, and the multiple overflow drippers 31 are all connected to the drainage groove 3 and correspond to the multiple overflow holes 11 one by one; a mounting plate 32 is slidably connected in the drainage groove 3, and a plurality of dredging rods 33 are connected to the mounting plate 32, and the multiple dredging rods 33 slide in the multiple overflow drippers 31 respectively, and a second spring 34 is connected between the mounting plate 32 and the drainage groove 3; a camshaft 35 is rotatably connected in the drainage groove 3, the camshaft 35 is fitted with the mounting plate 32, and a torsion spring 36 is connected between the camshaft 35 and the drainage groove 3, and a storage wheel 37 is connected to the end of the camshaft 35, and a second pull rope 38 is connected between the storage wheel 37 and the scraper 4, and a guide wheel 39 cooperating with the second pull rope 38 is rotatably connected to the outer wall of the first box body 1, and the dredging rod 33 slides back and forth in the overflow dripper 31 when the scraper 4 slides.

[0067] When the scraper bar 4 slides, the second pull rope 38 is pulled to make the storage wheel 37 rotate, so that the cam shaft 35 connected to the storage wheel 37 rotates, and the side wall of the cam shaft 35 reciprocates to push the mounting plate 32, and the elastic force of the second spring 34 is cooperated to make the dredging rod 33 reciprocate in the overflow drip tube 31, so that the overflow drip tube 31 is dredged, thereby preventing the overflow drip tube 31 from being blocked. When clean water is injected into the rectangular box 43 to make the rectangular counterweight 42 move up, the torsion spring 36 elastically recovers, so that the storage wheel 37 stores the second pull rope 38, and pulls the scraper bar 4 in the opposite direction to reset, and at the same time makes the first pull rope 41 tight, so as to prepare for the next dredging of the overflow drip tube 31;

[0068] The guide wheel 39 guides the pulling direction of the second pull rope 38 and prevents the second pull rope 38 from being worn too quickly.

[0069] An in-situ production and application method of agricultural microalgae fertilizer comprises the following steps:

[0070] The first box body 1 is buried in the soil so that the overflow hole 11 faces the crop;

[0071] Adding culture solution and microalgae into the first box 1, the microalgae grows after being exposed to light;

[0072] According to the time when the crops need fertilizer, the supplementary pipe 23 is controlled to inject the culture solution into the first box 1. When the liquid level in the first box 1 rises to the position of the overflow hole 11, the culture solution containing microalgae flows out through the overflow hole 11 and fertilizes the crops;

[0073] Stop replenishing the culture solution in the replenishing tube 23, the liquid level in the first box 1 stops rising, and the microalgae remaining in the first box 1 continue to grow to form a new batch of microalgae fertilizer;

[0074] Repeat the above steps at the next fertilization opportunity.

[0075] Example 2, reference Figure 7 and Figure 8On the basis of Example 1, tap water is poured into the second box 2. According to the growth requirements of Chlorella and tomatoes, inorganic nutrients are added with reference to the requirements of BG11 culture medium, and the culture solution is dissolved and prepared for standby use. The valve is opened to inject the culture solution from the second box 2 into the first box 1 until the liquid level reaches the height of the overflow hole 11. Chlorella is introduced into the culture solution, and the Chlorella is cultured for fifteen days using natural light to proliferate the Chlorella to produce active Chlorella fertilizer. After fifteen days, the valve is opened to allow the culture solution containing Chlorella to overflow and drip into the soil through the overflow hole 11 to complete the tomato fertilization process. After the fertilization is completed, the valve is closed, and part of the Chlorella is left in the first box 1. This part of the Chlorella is used as the algae species for the next cycle of cultivation. The above process is performed once every fifteen days, and the in-situ cultivation of Chlorella fertilizer and the application of tomatoes are performed regularly. The tomato planting cycle is two months in total. The fifteen-day growth curve of Chlorella in the first box 1 is shown in FIG. Figure 7 It can be seen that Chlorella grows well in the microalgae fertilizer in-situ culture device provided in this embodiment. The total fruit weight index of tomatoes after regular application of Chlorella fertilizer is shown in FIG. Figure 8 It can be seen that the in-situ culture device for microalgae fertilizer provided in Example 1 has a significant effect on improving tomato yield.

[0076] Example 3, reference Fig. 9 and Fig.10 On the basis of Example 1, tap water is poured into the second box 2. According to the growth requirements of yellow silk algae and pepper, inorganic nutrients are added with reference to the requirements of MCM culture medium, and the culture solution is dissolved and prepared for standby use. The valve is opened to inject the culture solution from the second box 2 into the first box 1 until the liquid level reaches the height of the overflow hole 11. Yellow silk algae is introduced into the culture solution, and the yellow silk algae is cultured for fifteen days using natural light to proliferate the yellow silk algae to produce active fertilizer for yellow silk algae. After fifteen days, the valve is opened to allow the culture solution containing the yellow silk algae to overflow and drip into the soil through the overflow hole 11 to complete the fertilization process of the pepper. After the fertilization is completed, the valve is closed, and part of the yellow silk algae is left in the first box 1. This part of the yellow silk algae is used as the algae species for the next cycle of cultivation. The above process is performed once every fifteen days, and the in-situ cultivation of the yellow silk algae fertilizer and the application of the pepper are performed regularly. The pepper planting cycle is two months in total. The fifteen-day growth curve of the yellow silk algae in the first box 1 is shown in FIG. Fig. 9 It can be seen that the yellow silk algae grows well in the microalgae fertilizer in-situ culture device provided in this embodiment. The total fruit weight index of pepper after regular application of the yellow silk algae fertilizer is shown in FIG. Fig.10 It can be seen that the microalgae fertilizer in-situ cultivation device provided in Example 1 has a significant effect on improving pepper yield.

[0077] 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. An in-situ manufacturing and application device for agricultural microalgae fertilizer, characterized in that: The invention comprises a first box (1), wherein the first box (1) is filled with culture solution and microalgae, the first box (1) is connected to a replenishing pipe (23), a plurality of overflow holes (11) are provided on the side wall of the first box (1), the replenishing pipe (23) can replenish the culture solution into the first box (1), and the replenishing pipe (23) injects the culture solution into the first box (1) and when the culture solution level reaches the overflow holes (11), the culture solution containing the microalgae flows out to the soil, and when the injection of the culture solution into the first box (1) stops, the microalgae remaining in the first box (1) continue to grow.

2. The in-situ production and application device for agricultural microalgae fertilizer according to claim 1, characterized in that: The drainage end of the supplementary pipe (23) is immersed below the liquid surface of the culture liquid in the first box (1).

3. The in-situ production and application device for agricultural microalgae fertilizer according to claim 1, characterized in that: The plurality of overflow holes (11) are located at the same height.

4. The in-situ production and application device for agricultural microalgae fertilizer according to claim 1, characterized in that: The outer wall of the first box (1) is connected to an overflow drip tube (31), and the overflow drip tube (31) guides the culture solution containing microalgae flowing out of the overflow hole (11) to the root and stem of the plant.

5. The in-situ production and application device for agricultural microalgae fertilizer according to claim 4, characterized in that: The top of the first box (1) is covered with a transparent cover plate (12).

6. The in-situ production and application device for agricultural microalgae fertilizer according to claim 5, characterized in that: The invention also comprises a second box body (2), wherein the second box body (2) is filled with culture fluid, the second box body (2) is connected to a vertical pipe (21), the vertical pipe (21) is connected to a horizontal pipe (22), the horizontal pipe (22) is connected to the supplementary pipe (23), and the vertical pipe (21) is provided with a valve.

7. The in-situ production and application device for agricultural microalgae fertilizer according to claim 6, characterized in that: The upper surface of the transparent cover plate (12) is slidably connected to a scraper strip (4), the scraper strip (4) is connected to a first pull rope (41), and the other end of the first pull rope (41) is connected to a rectangular counterweight block (42); A rectangular box (43) is connected to the side of the first box body (1), the rectangular counterweight block (42) slides in the rectangular box (43), a water outlet pipe (44) is connected between the rectangular counterweight block (42) and the scraper bar (4), a diversion hole (441) connected to the water outlet pipe (44) is provided in the scraper bar (4), an end of the water outlet pipe (44) away from the scraper bar (4) passes through the rectangular counterweight block (42) and is connected to the rectangular box (43), and a protrusion is provided at the port of the rectangular box (43); The water outlet pipe (44) is connected to a water supply pipe (45), and the water supply pipe (45) is connected to an external high-pressure water source. A three-way valve (46) is provided at the connection between the water outlet pipe (44) and the water supply pipe (45). When the water outlet pipe (44) is connected to the inner cavity of the rectangular box (43) but not connected to the water supply pipe (45), the rectangular counterweight (42) slides down the rectangular box (43) under gravity, so that the water in the rectangular box (43) is discharged from the water outlet pipe (44), and the rectangular counterweight (42) pulls the scraper (4) to slide on the transparent cover plate (12); and when the water outlet pipe (44) is connected to the water supply pipe (45) but not connected to the diversion hole (441) on the scraper (4), the high-pressure water source is injected into the rectangular box (43), so that the rectangular counterweight (42) moves up and resets.

8. The in-situ production and application device for agricultural microalgae fertilizer according to claim 7, characterized in that: The bottom end of the vertical tube (21) is internally slidably connected with a sliding column (48), a first spring (481) is connected between the bottom of the sliding column (48) and the bottom end of the vertical tube (21), the upper part of the rectangular counterweight (42) is connected with a micro cylinder (47), and an air pipe (49) is connected between the micro cylinder (47) and the lower space of the sliding column (48); The slide column (48) slides at the connection between the vertical pipe (21) and the horizontal pipe (22); a water pump is connected to the vertical pipe (21); when water flows in the vertical pipe (21), the slide column (48) slides down, the vertical pipe (21) is connected to the horizontal pipe (22), and the micro cylinder (47) extends and drives the three-way valve (46) to change direction.

9. The in-situ production and application device for agricultural microalgae fertilizer according to claim 8, characterized in that: The side wall of the first box body (1) is connected to a drainage groove (3), the number of the overflow drip tubes (31) is multiple, and the multiple overflow drip tubes (31) are all connected to the drainage groove (3) and correspond one-to-one to the multiple overflow holes (11); A mounting plate (32) is slidably connected in the drainage groove (3), a plurality of dredging rods (33) are connected to the mounting plate (32), the plurality of dredging rods (33) respectively slide in a plurality of overflow drip tubes (31), and a second spring (34) is connected between the mounting plate (32) and the drainage groove (3); A camshaft (35) is rotatably connected in the drainage groove (3), the camshaft (35) is fitted with the mounting plate (32), a torsion spring (36) is connected between the camshaft (35) and the drainage groove (3), a storage wheel (37) is connected to the end of the camshaft (35), a second pull rope (38) is connected between the storage wheel (37) and the scraper (4), a guide wheel (39) cooperating with the second pull rope (38) is rotatably connected to the outer wall of the first box body (1), and when the scraper (4) slides, the dredging rod (33) slides back and forth in the overflow drip tube (31).

10. A method for in-situ production and application of agricultural microalgae fertilizer, applied to the in-situ production and application device of agricultural microalgae fertilizer according to claim 1, characterized in that: The following steps are involved: The first box (1) is buried in the soil so that the overflow hole (11) faces the crop; Adding culture fluid and microalgae into the first box (1), and the microalgae grows after being exposed to light; According to the time when the crops need fertilizer, the supplementary pipe (23) is controlled to inject culture solution into the first box (1), and when the liquid level in the first box (1) rises to the position of the overflow hole (11), the culture solution containing microalgae flows out through the overflow hole (11) and fertilizes the crops; The replenishment of the culture liquid in the replenishment tube (23) is stopped, the liquid level in the first box (1) no longer rises, and the microalgae remaining in the first box (1) continue to grow, forming a new batch of microalgae fertilizer; Repeat the above steps at the next fertilization opportunity.

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