An aerated bamboo fertilization device and fertilization method

Abstract

This invention provides an aerated fertilizer applicator and method for *Phyllostachys edulis*, belonging to the field of *Phyllostachys edulis* planting technology. It includes a feed valve, a connecting frame, and a hollow insert rod. The feed valve comprises a valve body and a plunger longitudinally slidably connected within the valve body. The connecting frame connects the outer wall of the valve body to the upper end of the insert rod. A liquid inlet valve chamber and a mixing valve chamber are formed between the valve body and the plunger. The liquid inlet valve chamber is connected to the outlet of a water pump, and the inlet of the water pump is connected to a liquid fertilizer storage tank. The valve body has a one-way air inlet valve connecting the mixing valve chamber and the atmosphere. The mixing valve chamber is also connected to the upper end of the insert rod. The plunger has a first liquid inlet channel connecting the liquid inlet valve chamber and the mixing valve chamber. The inlet of the first liquid inlet channel is located on the wall of the plunger. A pre-tensioning spring is connected between the top of the plunger and the valve body. The aerated fertilizer applicator allows for the insertion of water and fertilizer, optimizing the fertilization effect and soil quality.

Description

Technical Field

[0001] This invention belongs to the field of bamboo planting technology and relates to an aerated bamboo fertilization device and fertilization method. Background Technology

[0002] Lei bamboo belongs to the Poaceae family and is an excellent bamboo species for shoot production among scattered bamboo species, with early shoot emergence. It is widely distributed in areas south of the Yangtze River. There are two varieties of Lei bamboo: broad-leaved Lei bamboo and narrow-leaved Lei bamboo. The narrow-leaved Lei bamboo shoots emerge 10-15 days earlier than the broad-leaved Lei bamboo. Its shoots are sweet and tender, with high yield and higher economic benefits than the broad-leaved Lei bamboo. Therefore, the narrow-leaved Lei bamboo is more widely planted. Its shoots have advantages such as high yield, delicious taste, and significant economic benefits. Moreover, the bamboo shoots are tender, crisp, and refreshing, with high nutritional value. They have always been loved by people and are regarded as a mountain delicacy and high-quality forest product. They are a traditional major export agricultural and forestry product of my country.

[0003] Since the introduction of Lei bamboo in 1994, Chongyang County in Xianning City has developed into the largest contiguous Lei bamboo planting area in the county, with a planting scale of more than 40,000 mu and an annual output of 15 million jin of fresh bamboo shoots. On average, each mu can bring bamboo shoot farmers a net income of about 8,000 yuan per year.

[0004] Lei bamboo shoots are large and robust, with thin shells and thick flesh, delicious taste, and rich nutrition, containing abundant fiber, various vitamins, and amino acids. Under natural conditions (taking southern Hubei as an example), Lei bamboo shoots emerge from the ground when the temperature reaches 10℃ from late February to early March, missing the optimal market season during the Spring Festival. Through proper fertilization and temperature control techniques such as mulching, the shoot emergence period can be advanced, yields increased, and the shoots more flavorful, meeting the demand for Lei bamboo shoots during the Spring Festival and significantly increasing economic benefits. This is an important research direction for the economic cultivation of Lei bamboo; however, currently, this approach is relatively costly, and the yield of bamboo shoots before the natural emergence period is still not ideal. Summary of the Invention

[0005] The first objective of this invention is to address the aforementioned problems in the existing technology by providing an aerated bamboo fertilization device. The technical problem to be solved by this invention is how to provide an aerated fertilization method that reduces fertilizer loss, loosens the soil, increases soil oxygen content, and optimizes the bamboo shoot growth environment.

[0006] The objective of this invention can be achieved through the following technical solution: An aerated bamboo fertilization device, characterized in that it includes a feed valve, a connecting frame, and a hollow insert rod. The feed valve includes a valve body and a plunger that is longitudinally slidably connected within the valve body. The connecting frame connects the outer wall of the valve body to the upper end of the insert rod. A liquid inlet valve chamber and a mixing valve chamber are formed between the valve body and the plunger. The liquid inlet valve chamber is connected to the outlet of a water pump, and the inlet of the water pump is connected to a liquid fertilizer storage tank. The valve body has a one-way air inlet valve connecting the mixing valve chamber and the atmosphere. The mixing valve chamber is also connected to the upper end of the insert rod. The plunger has a first liquid inlet channel that connects the liquid inlet valve chamber and the mixing valve chamber. The inlet of the first liquid inlet channel is located on the wall of the plunger. A pre-tensioning spring is connected between the top of the plunger and the valve body.

[0007] Furthermore, the lower end of the connecting frame has a storage chamber, which is connected to the upper end of the insert rod, and the mixing valve chamber and the storage chamber are connected by a flexible hose.

[0008] Furthermore, the plunger has a pressurization chamber, the top of the pressurization chamber is provided with a breather hole, a piston slides longitudinally in the pressurization chamber, a preload spring is connected between the upper end of the piston and the plunger, and a second liquid inlet channel is provided below the piston that can communicate with the liquid inlet valve chamber. The entrance of the second liquid inlet channel is located on the wall of the plunger and is located above the entrance of the first liquid inlet channel.

[0009] There is a pressure boosting chamber here. The pressure boosting chamber can increase the displacement and pressure of the plunger when it moves down, and it can also extend the pressure storage period of the inlet valve chamber, so that the plunger can be effectively reset and adapt to the continuous delivery of high-pressure water. Especially when the plunger moves down, the upward movement of the piston can temporarily maintain the pressure in the inlet valve chamber below the preload of the preload spring, thereby ensuring that the pressure of the plunger when it moves down is greater.

[0010] Furthermore, the connecting frame includes two connecting plates, the upper ends of which are hinged to the outer wall of the valve body, and the lower ends of which are connected to the housing of the storage chamber. The two connecting plates and the housing of the storage chamber form a pressing force part.

[0011] Furthermore, a limiting plate fitted onto the valve body is connected between the two connecting plates.

[0012] When operating by hand, in order to adapt to the slope and irregularity of the forest ground, the pole is sometimes not inserted horizontally into the soil. Therefore, in order to improve the ease of operation and optimize the sensitivity of operation, there is a certain angle of swing between the connecting frame and the valve body, and the limiting plate restricts the swing amplitude.

[0013] Furthermore, the insertion rod includes a rod body, a material hole located within the rod body, and an anti-clogging structure located at the lower end of the insertion rod. The anti-clogging structure includes a large-diameter tapered plug facing downwards, a pull rod, and a spring plate. The spring plate is fixed in the middle of the rod body and has several through holes. The spring plate is connected to the upper end of the pull rod, and the tapered plug is connected to the lower end of the pull rod. The spring plate can drive the plug to seal the lower end of the material hole.

[0014] During continuous insertion, an anti-blocking structure is installed at the outlet to prevent soil from entering the insertion rod. Under normal conditions, a spring drives a conical plug to block the opening at the lower end of the insertion rod. The conical plug can only be opened when the hydraulic pressure is greater than the spring preload. Therefore, it is ensured that water vapor is sprayed out when the conical plug is open to prevent soil from entering, and the conical plug seals the lower opening of the insertion rod when there is no water vapor pressure. The conical plug can also guide the water vapor to a certain extent, resulting in a large spraying effect and a wide spray area.

[0015] Furthermore, the valve body has a holding portion.

[0016] The basic operating procedure is as follows: Hold the handle and insert the rod into the soil to a certain depth. If necessary, step on the pressure point to assist the rod and improve its ease of insertion. Water or fertilizer is continuously pumped into the inlet valve chamber after being pressurized by the pump. The plunger rises due to the increased pressure in the inlet valve chamber, compressing the first preload spring. When the second inlet channel connects to the inlet valve chamber, water pressure begins to act on the piston below, causing the piston to rise as well, compressing the second preload spring. During this process, due to the upward movement of the plunger, a certain amount of air is drawn into the mixing valve chamber through the one-way air inlet valve. The air pressure is slightly lower than atmospheric pressure until the inlet of the first inlet channel connects to the inlet valve chamber. At this point, the inlet valve chamber instantly connects to the mixing valve chamber. Because the hydraulic pressure in the inlet valve chamber is higher than that in the mixing valve chamber, the high-pressure liquid instantly fills the mixing valve chamber, achieving gas-liquid mixing. During the pressure compensation process between the mixing valve chamber and the liquid inlet valve chamber, the pressure in the liquid inlet valve chamber drops instantaneously. Under the action of the pre-tightening spring, the plunger quickly plunges downward, driving the gas-liquid mixture in the mixing valve chamber into the storage chamber, and then into the soil through the insertion rod. During the recovery process of the pre-tightening spring, the first liquid inlet channel is blocked again by the valve body, and the liquid inlet valve chamber and the mixing valve chamber are separated again, that is, the plunger resets and enters the next cycle. By continuously delivering high-pressure liquid into the liquid inlet valve chamber, the plunger reciprocates, thereby filling the soil with naturally drawn air and liquid after mixing. This method can not only increase the soil oxygen content, promote the growth of bamboo rhizomes and roots, and improve soil compaction, but also achieve gas-liquid distribution and diffusion. The soil insertion density of the insertion-type fertilizer glue does not need to be too high, reducing damage to bamboo rhizomes or shoots during the insertion process.

[0017] In addition, compared with sprinkling fertilizer and water, the above method can significantly reduce fertilizer and water loss and waste. Due to the spray pressure, the planting depth can be appropriately reduced, such as controlled at about 15cm, and the fertilization depth can exceed 25cm, effectively preventing mechanical damage to the bamboo shoots. The diffused soil water and air application makes the fertilizer more even, avoiding blackening of the rhizomes and rotting of the bamboo shoots.

[0018] Finally, the loose soil is conducive to the growth of Lei bamboo shoots, resulting in tender, plump shoots with high water content and high yield.

[0019] The second objective of this invention is to propose a fertilization method for bamboo forests using the aforementioned aeration fertilization device, aiming to optimize bamboo shoot yield and quality.

[0020] A fertilization method, characterized by the following specific operations:

[0021] Water Management: Precise irrigation should be carried out on the bamboo grove to meet its water requirements at each growth stage. Irrigation should be carried out promptly when the soil is dry, especially during key periods such as the shoot differentiation, shoot enlargement, and winter shoot stages. Before covering the bamboo grove in mid-November, the bamboo shoots require a large amount of water for emergence and growth; therefore, the grove should be thoroughly watered and covered immediately.

[0022] Fertilization schedule: The first application of fertilizer is in early May, with 22,500 kg / hm2 of organic fertilizer applied; the second application is in late May, preferably on a cloudy or rainy day, with 300 kg / hm2 of high-nitrogen compound fertilizer applied; the third application is in late June, with 300 kg / hm2 of high-nitrogen compound fertilizer applied; the fourth application is in late July, with 450 kg / hm2 of high-nitrogen compound fertilizer applied; and the fifth application is in late August, with 450 kg / hm2 of high-nitrogen compound fertilizer applied.

[0023] Bamboo shoot fertilizer: In late September, as the temperature gradually decreases and the growth of bamboo rhizomes slows down, the bamboo shoots enter the differentiation period. At this time, 450 kg / hm2 of high-nitrogen compound fertilizer should be applied.

[0024] Warming fertilizer: Fertilizer should be applied in early November. When covering, apply 7500 kg / hm2 of unfermented cake fertilizer and 750 kg / hm2 of high-potassium compound fertilizer.

[0025] Bamboo shoot hole fertilizer: Fertilizer should be applied at the end of April of the following year. After removing the rice husks, apply 300 kg / hm2 of urea.

[0026] The above-mentioned compound fertilizer, water and urea are all applied using the aerated fertilizer application device, with the insertion depth of the rod controlled between 10 and 20 mm; the peak discharge pressure of the rod outlet is 1.5 to 4 atmospheres.

[0027] This invention adjusts the traditional three / four-times fertilization method to eight fertilizations per year, extending the duration of fertilizer effectiveness through frequent, small-volume applications. This promotes efficient fertilizer utilization without increasing the total amount of fertilizer. Especially during the period from May to August, which directly affects bamboo rhizomes and the following year's bamboo shoot yield, heavy and early fertilization is essential to continuously replenish soil nutrients and maintain high and stable bamboo shoot yields.

[0028] By combining measures such as forest land selection, weeding, bamboo forest mulching, bamboo shoot harvesting, and pest and disease control, the yield of bamboo shoots can reach more than 2,500 kg / mu. With appropriate adjustments based on local conditions and time, the proportion of bamboo shoot production before the Spring Festival can be no less than one-fifth, and the bamboo shoots have good appearance, good taste, and high economic benefits. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the aerated bamboo fertilization device.

[0030] Figure 2 This is a cross-sectional view of the aerated bamboo fertilization device.

[0031] Figure 3 This is a schematic diagram of the feed valve in the accumulator state.

[0032] Figure 4 This is a schematic diagram of the feed valve in the discharge state.

[0033] Figure 5 yes Figure 2 A magnified view of part A in the middle.

[0034] Figure 6 This is a schematic diagram of the reed's structure.

[0035] In the diagram, 1. Feed valve; 11. Valve body; 12. Plunger; 13. Liquid inlet valve chamber; 14. Mixing valve chamber; 15. One-way air inlet valve; 16. First liquid inlet channel; 17. Pre-tightening spring one; 21. Pressure boosting chamber; 22. Piston; 23. Pre-tightening spring two; 24. Second liquid inlet channel; 3. Connecting frame; 31. Storage chamber; 32. Hose; 33. Connecting plate; 34. Pressing force part; 35. Limiting plate; 4. Insert rod; 41. Rod body; 42. Material hole; 43. Conical plug; 44. Pull rod; 45. Spring; 5. Handling part. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] like Figures 1-6As shown, the aerated bamboo fertilization device includes a feed valve 1, a connecting frame 3, and a hollow insert rod 4. The feed valve 1 includes a valve body 11 and a plunger 12 that is longitudinally slidably connected inside the valve body 11. The connecting frame 3 connects the outer wall of the valve body 11 to the upper end of the insert rod 4. A liquid inlet valve chamber 13 and a mixing valve chamber 14 located below the liquid inlet valve chamber 13 are formed between the valve body 11 and the plunger 12. The liquid inlet valve chamber 13 is connected to the outlet of a water pump, and the inlet of the water pump is connected to a liquid fertilizer storage tank. The valve body 11 has a one-way air inlet valve 15 that connects the mixing valve chamber 14 to the atmosphere. The mixing valve chamber 14 is also connected to the upper end of the insert rod 4. The plunger 12 has a first liquid inlet channel 16 that can connect the liquid inlet valve chamber 13 and the mixing valve chamber 14. The inlet of the first liquid inlet channel 16 is located on the wall of the plunger 12. A pre-tightening spring 17 is connected between the top of the plunger 12 and the valve body 11. The valve body 11 has a handle 5.

[0038] The lower end of the connecting frame 3 has a storage chamber 31, which is connected to the upper end of the insert rod 4. The mixing valve chamber 14 is connected to the storage chamber 31 through a flexible hose 32.

[0039] The plunger 12 has a pressure-boosting chamber 21 with a vent at the top. A piston 22 slides longitudinally within the pressure-boosting chamber 21. A preload spring 23 connects the upper end of the piston 22 to the plunger 12. Below the piston 22 is a second inlet channel 24 that communicates with the inlet valve chamber 13. The inlet of the second inlet channel 24 is located on the wall of the plunger 12 and is located above the inlet of the first inlet channel 16. The pressure-boosting chamber 21 increases the displacement and pressure of the plunger 12 during downward movement and extends the pressure storage period of the inlet valve chamber 13, allowing the plunger 12 to effectively reset and adapt to the continuous delivery of high-pressure water. Especially when the plunger 12 moves downward, the upward movement of the piston 22 can temporarily maintain the pressure in the inlet valve chamber 13 below the preload force of the preload spring 17, thus ensuring a higher pressure during the downward movement of the plunger 12.

[0040] The connecting frame 3 includes two connecting plates 33. The upper ends of the two connecting plates 33 are hinged to the outer wall of the valve body 11, and the lower ends of the two connecting plates 33 are connected to the housing of the storage chamber 31. The two connecting plates 33 and the housing of the storage chamber 31 form a pressing force part 34. A limiting plate 35 sleeved on the outside of the valve body 11 is connected between the two connecting plates 33.

[0041] When operating by hand, in order to adapt to the slope of the forest and the irregularity of the ground, the insertion rod 4 is sometimes not inserted horizontally into the soil. Therefore, in order to improve the ease of operation and optimize the sensitivity of operation, there is a certain angle of swing between the connecting frame 3 and the valve body 11, and the limiting plate 35 restricts the swing amplitude.

[0042] The insert rod 4 includes a rod body 41, a material hole 42 located inside the rod body 41, and an anti-clogging structure located at the lower end of the insert rod 4. The anti-clogging structure includes a large-diameter tapered plug 43 facing downward, a pull rod 44, and a spring plate 45. The spring plate 45 is fixed in the middle of the rod body 41. Several through holes are opened on the spring plate 45. The spring plate 45 is connected to the upper end of the pull rod 44, and the tapered plug 43 is connected to the lower end of the pull rod 44. The spring plate 45 can drive the plug to seal the lower end of the material hole 42.

[0043] During continuous insertion, to prevent soil from entering the insertion rod 4, an anti-blocking structure is installed at its outlet. Under normal conditions, the spring 45 drives the conical plug 43 to block the opening at the lower end of the insertion rod 4. The conical plug 43 can only be opened when the hydraulic pressure is greater than the pre-tightening force of the spring 45. Therefore, it is ensured that water vapor is sprayed out when the conical plug 43 is open to prevent soil from entering, and the conical plug 43 seals the lower end opening of the insertion rod 4 when there is no water vapor pressure. The conical plug 43 can also guide the water vapor to a certain extent, resulting in a large water vapor spraying effect and a large spray area.

[0044] The basic operating procedure is as follows: Hold the handle 5 and insert the rod 4 into the soil to a certain depth. If necessary, step on the pressure part 34 to assist the rod 4 in easily inserting it into the soil. Water or fertilizer is continuously pumped into the inlet valve chamber 13 after being pressurized by the water pump. The plunger 12 rises due to the increased pressure in the inlet valve chamber 13 and compresses the pre-tension spring 17. When the second inlet channel 24 is connected to the inlet valve chamber 13, the water pressure begins to act on the piston 22. The piston 22 also rises due to the increased water pressure and compresses the pre-tension spring 23. During the above process, due to the upward movement of the plunger 12, a certain amount of air is drawn into the mixing valve chamber 14 through the one-way air inlet valve 15. The air pressure is slightly lower than atmospheric pressure until the inlet of the first inlet channel 16 is connected to the inlet valve chamber 13. The inlet valve chamber 13 is then instantly connected to the mixing valve chamber 14. Since the hydraulic pressure in the inlet valve chamber 13 is higher than that in the mixing valve chamber 14, the high-pressure liquid instantly fills the mixing valve chamber 14. During the gas-liquid mixing process, pressure compensation is achieved between the mixing valve chamber 14 and the liquid inlet valve chamber 13. The pressure in the liquid inlet valve chamber 13 decreases instantaneously, and the plunger 12, under the action of the pre-tightening spring 17, rapidly plunges downwards, driving the gas-liquid mixture in the mixing valve chamber 14 into the storage chamber 31. This mixture is then injected into the soil through the insertion rod 4. During the recovery process of the pre-tightening spring 17, the first liquid inlet channel 16 is re-blocked by the valve body 11, and the liquid inlet valve chamber 13 and the mixing valve chamber 14 are separated again. The plunger 12 resets and enters the next cycle. By continuously supplying high-pressure liquid to the liquid inlet valve chamber 13, the plunger 12 reciprocates, thereby mixing naturally drawn air and liquid and filling the soil. This method not only increases soil oxygen content, promotes the growth of bamboo rhizomes and roots, and improves soil compaction, but also achieves gas-liquid distribution and diffusion. The soil insertion density of the immersion fertilizer adhesive does not need to be too high, reducing damage to bamboo rhizomes or shoots during insertion.

[0045] In addition, compared with sprinkling fertilizer and water, the above method can significantly reduce fertilizer and water loss and waste. Due to the spray pressure, the planting depth can be appropriately reduced, such as controlled at about 15cm, and the fertilization depth can exceed 25cm, effectively preventing mechanical damage to the bamboo shoots. The diffused soil water and air application makes the fertilizer more even, avoiding blackening of the rhizomes and rotting of the bamboo shoots.

[0046] The specific operation method for fertilizing bamboo forests using the above-mentioned aeration fertilization device is as follows:

[0047] Water Management: Bamboo groves are evergreen and prefer moist soil but are susceptible to waterlogging and drought. To promote early shoot emergence, it is essential to strengthen fertilizer and water management in the bamboo grove. Water-saving irrigation facilities should be used to precisely irrigate the bamboo groves to be covered, meeting the water requirements of each growth stage. Based on the growth characteristics of Lei bamboo, irrigation should be carried out promptly when the soil is dry during key periods such as shoot differentiation, shoot enlargement, and winter shoot emergence. Before the covering and insulation operation in mid-November, the soil should be thoroughly watered. Covering should be carried out immediately after watering, as bamboo shoots require a large amount of water for emergence and growth; therefore, thorough watering and immediate covering are crucial. The covering here refers to insulation measures. Rice straw and rice husks are used as insulation materials, and a double-layer covering method is employed: a lower layer of rice straw and vegetable cake fertilizer, and an upper layer of rice husks for insulation. The covering thickness is generally between 15 and 45 cm. The covering should be gradually removed before the Lei bamboo naturally emerges, and all covering should be removed by mid-to-late April. The general practice is to cover the bamboo for 3 years and then let it rest for 3 years. When harvesting bamboo shoots before the natural bamboo shoot season, you can remove the covering and dig out the bamboo shoots when cracks appear in the upper layer of husks or when you walk on the covering and feel a hard bottom.

[0048] Rhizome fertilization: Rhizome fertilization from May to August is extremely important, directly affecting bamboo rhizome formation and the following year's bamboo shoot yield. It must be applied heavily and early. The first rhizome fertilization is in early May, with 22,500 kg / hm2 of organic fertilizer applied; the second is in late May, preferably on a cloudy or rainy day, with 300 kg / hm2 of high-nitrogen compound fertilizer applied; the third is in late June, with 300 kg / hm2 of high-nitrogen compound fertilizer applied; the fourth is in late July, with 450 kg / hm2 of high-nitrogen compound fertilizer applied; and the fifth is in late August, with 450 kg / hm2 of high-nitrogen compound fertilizer applied.

[0049] Bamboo shoot fertilizer: In late September, as the temperature gradually decreases and the growth of bamboo rhizomes slows down, the bamboo shoots enter the differentiation period. At this time, 450 kg / hm2 of high-nitrogen compound fertilizer should be applied.

[0050] Warming fertilizer: Applying warming fertilizer before covering can increase soil temperature, accelerate bamboo shoot differentiation and expansion, and promote earlier bamboo shoot emergence. Fertilization should be done in early November, with 7500 kg / hm2 of unfermented cake fertilizer and 750 kg / hm2 of high-potassium compound fertilizer applied during covering.

[0051] Bamboo shoot fertilization: When fertilizing, the fertilizer should not come into direct contact with the bamboo rhizomes and young shoots to avoid blackening of the rhizome roots and rotting of the shoot buds. Fertilization should be done at the end of April of the following year, after removing the rice husks, by applying 300 kg / hm2 of urea.

[0052] The application of the above-mentioned compound fertilizer, water and urea is carried out using an aeration fertilizer application device. The insertion depth of the insertion rod 4 is controlled between 10 and 20 mm. The peak discharge pressure of the insertion rod 4 outlet is 1.5 to 4 atmospheres.

[0053] This invention adjusts the traditional three / four-times fertilization method to eight fertilizations per year, extending the duration of fertilizer effectiveness through frequent, small-volume applications. This promotes efficient fertilizer utilization without increasing the total amount of fertilizer. Especially during the period from May to August, which directly affects bamboo rhizomes and the following year's bamboo shoot yield, heavy and early fertilization is essential to continuously replenish soil nutrients and maintain high and stable bamboo shoot yields.

[0054] By combining measures such as forest land selection, weeding, bamboo forest mulching, bamboo shoot harvesting, and pest and disease control, the yield of bamboo shoots can reach more than 2,500 kg / mu. With appropriate adjustments based on local conditions and time, the proportion of bamboo shoot production before the Spring Festival can be no less than one-fifth, and the bamboo shoots have good appearance, good taste, and high economic benefits.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An aerated bamboo fertilization device, characterized in that, The device includes a feed valve (1), a connecting frame (3), and a hollow insert rod (4). The feed valve (1) includes a valve body (11) and a plunger (12) that slides longitudinally within the valve body (11). The connecting frame (3) connects the outer wall of the valve body (11) to the upper end of the insert rod (4). A liquid inlet valve chamber (13) and a mixing valve chamber (14) are formed between the valve body (11) and the plunger (12). The liquid inlet valve chamber (13) is connected to the outlet of a water pump, and the inlet of the water pump is connected to... The liquid fertilizer storage tank has a one-way air inlet valve (15) on the valve body (11) that connects the mixing valve chamber (14) and the atmosphere. The mixing valve chamber (14) is also connected to the upper end of the insert rod (4). The plunger (12) has a first liquid inlet channel (16) that can connect the liquid inlet valve chamber (13) and the mixing valve chamber (14). The inlet of the first liquid inlet channel (16) is located on the wall of the plunger (12). A preload spring (17) is connected between the top of the plunger (12) and the valve body (11). The lower end of the connecting frame (3) has a storage chamber (31), which is connected to the upper end of the insert rod (4). The mixing valve chamber (14) and the storage chamber (31) are connected by a flexible hose (32). The plunger (12) has a pressurization chamber (21) inside, and a vent hole is provided at the top of the pressurization chamber (21). A piston (22) slides longitudinally inside the pressurization chamber (21). A pre-tightening spring (23) is connected between the upper end of the piston (22) and the plunger (12). Below the piston (22) is a second liquid inlet channel (24) that can communicate with the liquid inlet valve chamber (13). The entrance of the second liquid inlet channel (24) is located on the wall of the plunger (12), and the entrance of the second liquid inlet channel (24) is located above the entrance of the first liquid inlet channel (16). The connecting frame (3) includes two connecting plates (33). The upper ends of the two connecting plates (33) are hinged to the outer wall of the valve body (11), and the lower ends of the two connecting plates (33) are connected to the shell of the storage chamber (31). The two connecting plates (33) and the shell of the storage chamber (31) form a pressing force part (34). The insertion rod (4) includes a rod body (41), a material hole (42) located inside the rod body (41), and an anti-clogging structure located at the lower end of the insertion rod (4). The anti-clogging structure includes a large-diameter tapered plug (43) with its end facing downward, a pull rod (44), and a spring (45). The spring (45) is fixed in the middle of the rod body (41). The spring (45) has several through holes. The spring (45) is connected to the upper end of the pull rod (44), and the tapered plug (43) is connected to the lower end of the pull rod (44). The spring (45) can drive the tapered plug (43) to block the lower end of the material hole (42).

2. The aerated bamboo fertilization device according to claim 1, characterized in that, A limiting plate (35) is fitted outside the valve body (11) between the two connecting plates (33).

3. The aerated bamboo fertilization device according to claim 1, characterized in that, The valve body (11) has a holding part (5).

4. A method for fertilizing bamboo, characterized in that, The specific steps are as follows: Water management: Accurately irrigate the bamboo forest to be covered to meet the water requirements of the bamboo forest at each growth stage; during the bamboo shoot differentiation period, bamboo shoot swelling period and winter bamboo shoot period, irrigation should be carried out in time when the soil is dry; before covering the bamboo forest in mid-November, the bamboo shoots need a lot of water to grow after emerging from the soil, so they should be thoroughly watered and covered immediately. Apply fertilizer as needed: The first application of fertilizer should be done in early May, with 22,500 kg / hm² of organic fertilizer applied. 2 The second application was in late May, on a cloudy or rainy day, using 300 kg / hm² of high-nitrogen compound fertilizer. 2 The third application was in late June, with 300 kg / hm² of high-nitrogen compound fertilizer. 2 The fourth application was in late July, with 450 kg / hm² of high-nitrogen compound fertilizer. 2 The fifth application was in late August, with 450 kg / hm² of high-nitrogen compound fertilizer. 2 ; Bamboo shoot fertilization: In late September, as temperatures gradually decrease and bamboo rhizome growth slows down, the bamboo enters the shoot differentiation period. At this time, apply 450 kg / hm² of high-nitrogen compound fertilizer. 2 ; Warming fertilizer: Fertilization should be done in early November, using 7500 kg / hm² of unfermented cake fertilizer as mulch. 2 750 kg / hm² of high-potassium compound fertilizer 2 ; Bamboo shoot hole fertilization: Fertilization should be done at the end of April of the following year, after removing the rice husks, applying 300 kg / hm² of urea. 2 ; The application of the above-mentioned compound fertilizer, water and urea is carried out using the aerated bamboo fertilization device described in any one of claims 1-3. The insertion depth of the insertion rod (4) into the soil is controlled between 10 and 20 mm; the peak discharge pressure of the insertion rod (4) is 1.5 to 4 atmospheres.

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