Aeration type phyllostachys praecox fertilizing device and fertilizing method

Abstract

The invention provides an aeration type phyllostachys praecox fertilizing device and a fertilizing method, and belongs to the technical field of phyllostachys praecox planting. Comprising a feeding valve, a connecting frame and a hollow inserting rod, the feeding valve comprises a valve body and a plunger longitudinally connected into the valve body in a sliding mode, the connecting frame is connected with the outer wall of the valve body and the upper end of the inserting rod, a liquid inlet valve cavity and a material mixing valve cavity located below the liquid inlet valve cavity are formed between the valve body and the plunger, and the liquid inlet valve cavity is connected with the water outlet end of a water pump. The water inlet end of the water pump is connected with the liquid fertilizer storage box, the valve body is provided with a one-way air inlet valve connected with the mixing valve cavity and the atmosphere, and the mixing valve cavity is further connected with the upper end of the insertion rod; the plunger is provided with a first liquid inlet channel capable of communicating the liquid inlet valve cavity with the material mixing valve cavity, an inlet of the first liquid inlet channel is located in the wall surface of the plunger, a pre-tightening spring I is connected between the top of the plunger and the valve body, and the aeration type fertilization device is used for performing insertion type application of water and fertilizer, so that the fertilization effect and the soil quality are optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of phyllostachys praecox planting and relates to an aerated phyllostachys praecox fertilizing device and a fertilizing method. Background Art

[0002] Phyllostachys praecox belongs to the Poaceae family. It is an excellent bamboo species that produces shoots earlier among scattered bamboo species. It is widely distributed in the area south of the Yangtze River. There are two varieties of Phyllostachys praecox, namely broad-leaved Phyllostachys praecox and fine-leaved Phyllostachys praecox. The shoots of fine-leaved Phyllostachys praecox are 10 to 15 days earlier than those of broad-leaved Phyllostachys praecox. The shoots taste sweet and tender, the yield is high, and the economic benefits are higher than those of broad-leaved Phyllostachys praecox. Therefore, fine-leaved Phyllostachys praecox is planted more frequently. Its shoots have the advantages of high yield, delicious taste, and significant economic benefits. The bamboo shoots are tender, crispy and refreshing, with high nutritional value. They have always been loved by people and are regarded as mountain delicacies and high-quality forest products. They are my country's traditional bulk export agricultural and forestry products.

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

[0004] Lei bamboo shoots are thick and plump, with thin shells and thick flesh, delicious and nutritious, rich in cellulose, various vitamins and amino acids. Under natural conditions (for example, in southern Hubei), Lei bamboo shoots emerge when the temperature reaches 10℃ from late February to early March, missing the best time to go on the market during the Spring Festival. Reasonable fertilization, covering and temperature control technology can advance the shoot period, increase the yield, and make the shoots delicious, meet the demand for Lei bamboo shoots during the Spring Festival, and significantly increase economic benefits. This is an important research direction for Lei bamboo economic cultivation; however, at present, the cost of this practice is relatively high, and the yield of bamboo shoots before the natural shoot period is not ideal. Summary of the invention

[0005] The first purpose of the present invention is to provide an aerated bamboo fertilization device in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to provide an aerated fertilization method to reduce fertilizer loss, loosen the soil, increase the soil oxygen content, and optimize the bamboo shoot environment.

[0006] The purpose of the present invention can be achieved through the following technical solutions: an aerated Leizhu fertilizing device, characterized in that it includes a feed valve, a connecting frame and a hollow plug rod, the feed valve includes a valve body and a plunger longitudinally slidably connected to the valve body, the connecting frame connects the outer wall of the valve body and the upper end of the plug rod, a liquid inlet valve cavity and a mixing valve cavity located below the liquid inlet valve cavity are formed between the valve body and the plunger, the liquid inlet valve cavity is connected to the water outlet end of a water pump, the water inlet end of the water pump is connected to a liquid fertilizer storage tank, the valve body is provided with a one-way air inlet valve connecting the mixing valve cavity and the atmosphere, and the mixing valve cavity is also connected to the upper end of the plug rod; the plunger is provided with a first liquid inlet channel that can connect the liquid inlet valve cavity and the mixing valve cavity, the inlet of the first liquid inlet channel is located on the wall surface of the plunger, and a preload spring is connected between the top of the plunger and the valve body.

[0007] Furthermore, the lower end of the connecting frame is provided with a material storage chamber, the material storage chamber is connected to the upper end of the insertion rod, and the mixing valve chamber is connected to the material storage chamber via a hose.

[0008] Furthermore, the plunger has a boosting chamber, a breathing hole is provided on the top of the boosting chamber, a piston slides longitudinally in the boosting chamber, a preload spring 2 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 be connected to the liquid inlet valve chamber, the inlet of the second liquid inlet channel is located on the wall surface of the plunger, and the inlet of the second liquid inlet channel is located above the inlet of the first liquid inlet channel.

[0009] A boost chamber is provided here, which can increase the displacement and pressure of the plunger when it moves downward, and extend the pressure storage market of the liquid 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 downward, because the upward movement of the piston can temporarily maintain the pressure in the liquid inlet valve chamber lower than the preload force of the preload spring, thereby ensuring that the pressure of the plunger moving downward is greater.

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

[0011] Furthermore, a limit plate sleeved outside the valve body is connected between the two connecting plates.

[0012] During handheld operations, in order to adapt to the slope of the forest and the irregularity of the ground, the insertion rod is sometimes not inserted into the soil horizontally. Therefore, in order to improve the portability of the operation and optimize the operational sensitivity, there is a certain angle of swing between the connecting frame and the valve body, and the limit plate limits the swing amplitude.

[0013] Furthermore, the insertion rod includes a rod body, a material hole located in the rod body and an anti-blocking structure located at the lower end of the insertion rod, the anti-blocking structure includes a conical plug with a large diameter end facing downward, a pull rod and a spring, the spring is fixed at the middle part of the rod body, a plurality of through holes are formed on the spring, the spring is connected to the upper end of the pull rod, the conical plug is connected to the lower end of the pull rod, and the spring can drive the plug to seal the lower end of the material hole.

[0014] In the process of continuous pulling and pulling, in order to prevent soil from entering the insertion rod, an anti-blocking structure is provided at its outlet. Under normal circumstances, the spring drives the 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 pre-tightening force of the spring. Therefore, it is ensured that water vapor is sprayed out when the conical plug is opened to prevent soil from entering, and there is no water vapor pressure driving the conical plug to seal the lower end opening of the insertion rod; the conical plug can also disperse the water vapor to a certain extent, and the water vapor spraying effect and dispersion surface are large.

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

[0016] The basic operation process is as follows: hold the handle and insert the rod into the soil to a certain depth. If necessary, step on the pressure part with your foot to assist the rod in improving the ease of inserting the rod into the soil; continuously output water or water-based fertilizer to the liquid inlet valve chamber after being pressurized by the water pump. The plunger is lifted due to the increased pressure in the liquid inlet valve chamber and compresses the preload spring 1. When the second liquid inlet channel is connected to the liquid inlet valve chamber, the water pressure begins to act on the bottom of the piston. The piston is also lifted due to the increased water pressure and compresses the preload spring 2. In the above process, due to the upward movement of the plunger, a certain amount of air is inhaled into the mixing valve chamber through the one-way air inlet valve, and the air pressure is slightly lower than the atmospheric pressure. Until the entrance of the first liquid inlet channel is connected to the liquid inlet valve chamber, the liquid inlet valve chamber is instantly connected to the mixing valve chamber. Since the hydraulic pressure in the liquid inlet valve chamber is higher than that in the mixing valve chamber, the high-pressure liquid is instantly filled into the mixing valve chamber to achieve gas-liquid mixing. During the process of pressure compensation between the mixing valve chamber and the liquid inlet valve chamber, the pressure in the liquid inlet valve chamber decreases instantly, and the plunger rushes down rapidly under the action of the preload spring, driving the gas-liquid mixture in the mixing valve chamber into the storage chamber, and then rushing into the soil through the insertion rod. During the recovery of the preload spring, the first liquid inlet channel is blocked by the valve body again, and the liquid inlet valve chamber and the mixing valve chamber are separated again, that is, the plunger is reset and enters the next cycle. By continuously delivering high-pressure liquid to the liquid inlet valve chamber, the reciprocating motion of the plunger is achieved, and the naturally inhaled air and liquid are mixed and filled into the soil. This method can not only increase the oxygen content in the soil, promote the growth of bamboo whips and roots, and improve soil compaction, but also realize gas-liquid distribution and diffusion. The soil density of the inserted fertilization glue does not need to be too large to reduce damage to bamboo whips or bamboo shoots during the insertion process.

[0017] In addition, compared with the broadcasting type of fertilization and watering, the above method can significantly reduce the waste of fertilizer and water. Due to the existence of the spray pressure, the depth of soil insertion can be appropriately reduced, such as controlling it at around 15cm. The fertilization depth can exceed 25cm, which can effectively prevent mechanical damage to the bamboo shoots. The water vapor under the soil is dispersed and applied at the same time, and the fertility is more uniform, avoiding the blackening of the whip roots and the rot of the bamboo shoots.

[0018] Finally, loose soil is conducive to the growth of bamboo shoots, making the bamboo shoots fresh, plump, high in water content and high in yield.

[0019] The second object of the present invention is to provide a method for fertilizing a leucophylla forest using the above-mentioned aeration fertilization device, aiming at optimizing the yield and quality of bamboo shoots.

[0020] A fertilization method, characterized in that the specific operations are as follows:

[0021] Water management: Carry out precise irrigation for the bamboo forest to be covered to meet the water requirements of the bamboo forest at various growth stages. During the key periods such as the bamboo shoot differentiation period, the bamboo shoot swelling period and the winter bamboo shoot period, when the soil is dry, irrigation should be carried out in time. Before covering the bamboo forest in mid-November, the bamboo shoots need a lot of water to grow out of the soil, so they should be watered thoroughly and covered immediately.

[0022] Row fertilizer: The first row fertilizer is in early May, spreading 22500kg / hm2 of organic fertilizer; the second time is in late May, it is better to choose rainy days to fertilize, spreading 300kg / hm2 of high nitrogen compound fertilizer; the third time is in late June, spreading 300kg / hm2 of high nitrogen compound fertilizer; the fourth time is in late July, spreading 450kg / hm2 of high nitrogen compound fertilizer; the fifth time is in late August, spreading 450kg / hm2 of high nitrogen compound fertilizer.

[0023] Fertilizer for bamboo shoots: In late September, the temperature gradually drops, the growth of bamboo shoots slows down, and it enters the bamboo shoot differentiation period. 450kg / hm2 of high-nitrogen compound fertilizer should be applied.

[0024] Warming fertilizer: The time for fertilization is early November. When covering, 7500kg / hm2 of unfermented cake fertilizer and 750kg / hm2 of high-potassium compound fertilizer should be applied.

[0025] Bamboo shoot hole fertilizer: The time for fertilization is at the end of April of the following year. After removing the husks, apply 300kg / hm2 of urea.

[0026] The application of the compound fertilizer, water and urea is all carried out by the aeration fertilization device, the depth of the rod inserted into the soil is controlled between 10 and 20 mm, and the peak value of the discharge pressure at the rod outlet is 1.5 to 4 atmospheres.

[0027] The present invention adjusts the traditional three-time / four-time fertilization method to eight-time fertilization per year, and prolongs the effect time of fertilizer by applying fertilizer in small amounts and multiple times, and promotes efficient use of fertilizer without increasing the total amount of fertilizer. Especially from May to August, which is directly related to the bamboo whipping and the yield of bamboo shoots in the next year, heavy and early fertilization is necessary to maintain high and stable yield of bamboo shoots by continuously replenishing soil nutrients.

[0028] By combining measures such as forest land selection, weeding, bamboo forest covering, bamboo shoot harvesting, and pest and disease control, the bamboo shoot yield per mu can reach more than 2,500 kg / mu. With appropriate adjustments based on local conditions and time, the bamboo shoot yield before the Spring Festival can account for no less than one-fifth of the total output. The bamboo shoots are of good quality, good taste, and high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the aeration type fertilization device for phyllostachys praecox.

[0030] Figure 2 It is a cross-sectional view of the aeration type fertilization device for phyllostachys praecox.

[0031] Figure 3 It is a structural diagram of the feed valve in the pressure accumulation state.

[0032] Figure 4 It is a structural diagram of the feed valve in the discharging state.

[0033] Figure 5 yes Figure 2 Enlarged view of part A in the figure.

[0034] Figure 6 It is a schematic diagram of the structure of the reed.

[0035] In the figure, 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. preload spring 1; 21. boost chamber; 22. piston; 23. preload spring 2; 24. second liquid inlet channel; 3. connecting frame; 31. material storage chamber; 32. hose; 33. connecting plate; 34. pressing force part; 35. limit plate; 4. plug rod; 41. rod body; 42. material hole; 43. conical plug; 44. pull rod; 45. spring leaf; 5. holding part. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0037] like Figure 1-Figure 6As shown, the aerated thrush fertilizing device includes a feed valve 1, a connecting frame 3 and a hollow plug rod 4. The feed valve 1 includes a valve body 11 and a plunger 12 longitudinally slidably connected in the valve body 11. The connecting frame 3 connects the outer wall of the valve body 11 and the upper end of the plug rod 4. A liquid inlet valve cavity 13 and a mixing valve cavity 14 located below the liquid inlet valve cavity 13 are formed between the valve body 11 and the plunger 12. The liquid inlet valve cavity 13 is connected to the water outlet end of a water pump, and the water inlet end of the water pump is connected to a liquid fertilizer storage tank. The valve body 11 is provided with a one-way air inlet valve 15 connecting the mixing valve cavity 14 and the atmosphere, and the mixing valve cavity 14 is also connected to the upper end of the plug rod 4; the plunger 12 is provided with a first liquid inlet channel 16 that can connect the liquid inlet valve cavity 13 and the mixing valve cavity 14, the inlet of the first liquid inlet channel 16 is located on the wall surface of the plunger 12, and a preload spring 17 is connected between the top of the plunger 12 and the valve body 11; the valve body 11 is provided with a holding portion 5.

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

[0039] The plunger 12 has a boosting chamber 21, a breathing hole is provided at the top of the boosting chamber 21, a piston 22 is longitudinally slidable in the boosting chamber 21, a preload spring 23 is connected between the upper end of the piston 22 and the plunger 12, and a second liquid inlet channel 24 is provided below the piston 22, which can be communicated 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. A boosting chamber 21 is provided here, which can increase the displacement and pressure of the plunger 12 when it moves downward, and can also extend the pressure storage market of the liquid inlet valve chamber 13, so that the plunger 12 can be effectively reset and adapted to the continuous delivery of high-pressure water, especially when the plunger 12 moves downward, because the upward movement of the piston 22 can temporarily maintain the pressure in the liquid inlet valve chamber 13 less than the preload force of the preload spring 17, thereby ensuring that the pressure of the plunger 12 moving downward is relatively large.

[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, the lower ends of the two connecting plates 33 are connected to the shell of the material storage chamber 31, and the two connecting plates 33 and the shell of the material storage chamber 31 form a pressing force part 34. A limit plate 35 sleeved on the outside of the valve body 11 is connected between the two connecting plates 33.

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

[0042] The insertion rod 4 includes a rod body 41, a material hole 42 located in the rod body 41 and an anti-blocking structure located at the lower end of the insertion rod 4. The anti-blocking structure includes a conical plug 43 with a large diameter end facing downward, a pull rod 44 and a spring 45. The spring 45 is fixed to the middle part of the rod body 41. A plurality of through holes are provided on the spring 45. The spring 45 is connected to the upper end of the pull rod 44, and the conical plug 43 is connected to the lower end of the pull rod 44. The spring 45 can drive the plug to seal the lower end of the material hole 42.

[0043] In the process of continuous pulling and pulling, in order to prevent soil from entering the insertion rod 4, an anti-blocking structure is provided at its outlet. Under normal circumstances, 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 when the conical plug 43 is opened, there is water vapor sprayed out to prevent soil from entering, and there is no water vapor pressure driving the conical plug 43 to block the lower end opening of the insertion rod 4; the conical plug 43 can also disperse the water vapor to a certain extent, and the water vapor spraying effect and dispersion surface are large.

[0044] The basic operation process 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 to improve the ease of inserting the rod 4 into the soil; continuously output water or water fertilizer to the liquid inlet valve chamber 13 after being pressurized by the water pump, and the plunger 12 is lifted due to the increased pressure in the liquid inlet valve chamber 13, and the preload spring 17 is compressed. When the second liquid inlet channel 24 is connected to the liquid inlet valve chamber 13, the water pressure begins to act on the bottom of the piston 22, and the piston 22 is also lifted due to the increased water pressure, compressing the preload spring 23. In the above process, due to the upward movement of the plunger 12, a certain amount of air is inhaled into the mixing valve chamber 14 through the one-way air inlet valve 15, and the air pressure is slightly lower than the atmospheric pressure, until the entrance of the first liquid inlet channel 16 is connected to the liquid inlet valve chamber 13, the liquid inlet valve chamber 13 is instantly connected to the mixing valve chamber 14, and since the hydraulic pressure in the liquid inlet valve chamber 13 is higher than that in the mixing valve chamber 14, the high-pressure liquid is instantly filled into the mixing valve chamber 14. 13, and the air in the mixing valve chamber 14 is filled with liquid and the mixture is stirred, and the mixture is put into the soil by the action of the plunger 12. When the mixture is put into the mixing valve chamber 14, the mixture is put into the soil by the action of the plunger 12. When the mixture is put into the mixing valve chamber 14, the mixture is put into the soil by the action of the plunger 12. When the mixture is put into the mixing valve chamber 14, the mixture is put into the soil by the action of the plunger 12. When the mixture is put into the mixing valve chamber 14, the mixture is put into the soil by the action of the plunger 12.

[0045] In addition, compared with the broadcasting type of fertilization and watering, the above method can significantly reduce the waste of fertilizer and water. Due to the existence of the spray pressure, the depth of soil insertion can be appropriately reduced, such as controlling it at around 15cm. The fertilization depth can exceed 25cm, which can effectively prevent mechanical damage to the bamboo shoots. The water vapor under the soil is dispersed and applied at the same time, and the fertility is more uniform, avoiding the blackening of the whip roots and the rot of the bamboo shoots.

[0046] The fertilization method for the leucophylla forest using the above-mentioned aeration fertilization device is specifically performed as follows:

[0047] Water management: Bamboo forests are evergreen all year round. They like moist soil but are afraid of waterlogging and drought. To produce bamboo shoots early, it is necessary to strengthen the fertilizer and water management of the bamboo garden. Use water-saving irrigation facilities to accurately irrigate the bamboo forest to be covered to meet the water requirements of the bamboo forest in various growth periods. According to the growth characteristics of Leizhu, irrigation should be carried out in time when the soil is dry during the key periods such as the differentiation period of bamboo shoots, the expansion period of bamboo shoots and the winter bamboo shoot period. In mid-November, before the covering and insulation operation, it is advisable to irrigate the forest soil thoroughly. After the water replenishment operation, the covering operation should be carried out immediately. Bamboo shoots need a lot of water to grow out of the ground. They should be irrigated thoroughly and covered immediately; the covering here refers to the insulation measures. The covering materials-use straw and husk as insulation and warming materials. The covering method-double-layer covering method, that is, straw, vegetable cake fertilizer, etc. are used in the lower layer, and husk is used as insulation in the upper layer. The covering thickness is generally between 15 and 45 cm. The covering materials will be gradually removed before Leizhu naturally produces bamboo shoots. By mid-to-late April, all the covering materials will be removed. Generally, the mulching method is to cover for 3 years and then rest for 3 years. When digging bamboo shoots before the natural shoot period, when cracks appear on the upper husk or people walk on the mulch and feel the top hard under their feet, you can remove the mulch and dig out the bamboo shoots.

[0048] Row fertilizer: Row fertilizer from May to August is extremely important, which is directly related to bamboo row and bamboo shoot yield in the next year. It must be applied heavily and early. The first row fertilizer is in early May, spreading organic fertilizer 22500kg / hm2; the second time is in late May, preferably on rainy days, spreading high nitrogen compound fertilizer 300kg / hm2; the third time is in late June, spreading high nitrogen compound fertilizer 300kg / hm2; the fourth time is in late July, spreading high nitrogen compound fertilizer 450kg / hm2; the fifth time is in late August, spreading high nitrogen compound fertilizer 450kg / hm2.

[0049] Fertilizer for bamboo shoots: In late September, the temperature gradually drops, the growth of bamboo shoots slows down, and it enters the bamboo shoot differentiation period. 450kg / hm2 of high-nitrogen compound fertilizer should be applied.

[0050] Warming fertilizer: Applying heat before covering can increase the ground temperature, accelerate the differentiation and expansion of shoots, and produce shoots earlier. The fertilization time is early November. When covering, 7500kg / hm2 of unfermented cake fertilizer and 750kg / hm2 of high-potassium compound fertilizer should be applied.

[0051] Bamboo shoot hole fertilizer: When applying fertilizer, the fertilizer should not directly touch the bamboo shoots and young shoots to avoid the blackening of the shoot roots and the rotting of the shoots. The time for fertilization is at the end of April of the following year. After removing the husks, apply 300kg / hm2 of urea.

[0052] The application of the above-mentioned compound fertilizer, water and urea is carried out by an aeration fertilization device, and the depth of the plug 4 into the soil is controlled between 10 and 20 mm; the peak value of the discharge pressure at the outlet of the plug 4 is 1.5 to 4 atmospheres.

[0053] The present invention adjusts the traditional three-time / four-time fertilization method to eight-time fertilization per year, and prolongs the effect time of fertilizer by applying fertilizer in small amounts and multiple times, and promotes efficient use of fertilizer without increasing the total amount of fertilizer. Especially from May to August, which is directly related to the bamboo whipping and the yield of bamboo shoots in the next year, heavy and early fertilization is necessary to maintain high and stable yield of bamboo shoots by continuously replenishing soil nutrients.

[0054] By combining measures such as forest land selection, weeding, bamboo forest covering, bamboo shoot harvesting, and pest and disease control, the bamboo shoot yield per mu can reach more than 2,500 kg / mu. With appropriate adjustments based on local conditions and time, the bamboo shoot yield before the Spring Festival can account for no less than one-fifth of the total output. The bamboo shoots are of good quality, good taste, and high economic benefits.

[0055] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An aerated fertilization device for Phyllostachys praecox, characterized in that: The invention comprises a feed valve (1), a connecting frame (3) and a hollow plug rod (4), wherein the feed valve (1) comprises a valve body (11) and a plunger (12) longitudinally slidably connected to the valve body (11), the connecting frame (3) connects the outer wall of the valve body (11) and the upper end of the plug rod (4), a liquid inlet valve cavity (13) and a mixing valve cavity (14) located below the liquid inlet valve cavity (13) are formed between the valve body (11) and the plunger (12), the liquid inlet valve cavity (13) is connected to the water outlet end of a water pump, and the water inlet end of the water pump is connected to the mixing valve cavity (14) A liquid fertilizer storage tank, wherein the valve body (11) is provided with a one-way air inlet valve (15) connecting a mixing valve chamber (14) and the atmosphere, and the mixing valve chamber (14) is also connected to the upper end of a plug rod (4); the plunger (12) is provided with a first liquid inlet channel (16) capable of connecting 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 surface of the plunger (12), and a preload spring (17) is connected between the top of the plunger (12) and the valve body (11).

2. The aeration type fertilization device for Phyllostachys praecox according to claim 1, characterized in that: The lower end of the connecting frame (3) is provided with a material storage chamber (31), the material storage chamber (31) is connected to the upper end of the insertion rod (4), and the mixing valve chamber (14) and the material storage chamber (31) are connected via a hose (32).

3. The aeration type fertilization device for Phyllostachys praecox according to claim 2, characterized in that: The plunger (12) has a boost chamber (21) in it, a breathing hole is provided at the top of the boost chamber (21), a piston (22) is longitudinally slidable in the boost chamber (21), a second preload spring (23) is connected between the upper end of the piston (22) and the plunger (12), a second liquid inlet channel (24) is provided below the piston (22) and is communicated with the liquid inlet valve chamber (13), an inlet of the second liquid inlet channel (24) is located on the wall surface of the plunger (12), and the inlet of the second liquid inlet channel (24) is located above the inlet of the first liquid inlet channel (16).

4. The aeration type fertilization device for Phyllostachys praecox according to claim 2, characterized in that: The connecting frame (3) comprises two connecting plates (33), the upper ends of the two connecting plates (33) are hinged to the outer wall surface of the valve body (11), the lower ends of the two connecting plates (33) are connected to the shell of the material storage chamber (31), and the two connecting plates (33) and the shell of the material storage chamber (31) form a pressing force portion (34).

5. The aeration type fertilization device for Phyllostachys praecox according to claim 4, characterized in that: A limit plate (35) sleeved outside the valve body (11) is connected between the two connection plates (33).

6. The aeration type fertilization device for Phyllostachys praecox according to claim 1, characterized in that: The insert rod (4) comprises a rod body (41), a material hole (42) located in the rod body (41) and an anti-blocking structure located at the lower end of the insert rod (4), wherein the anti-blocking structure comprises a conical plug (43) with a large diameter end facing downward, a pull rod (44) and a spring (45), wherein the spring (45) is fixed to the middle part of the rod body (41), and a plurality of through holes are formed on the spring (45), the spring (45) is connected to the upper end of the pull rod (44), the conical plug (43) is connected to the lower end of the pull rod (44), and the spring (45) can drive the plug to seal the lower end of the material hole (42).

7. The aeration type fertilization device for Phyllostachys praecox according to claim 1, characterized in that: The valve body (11) is provided with a holding portion (5).

8. A method for fertilizing Phyllostachys praecox, characterized in that: The specific operations are as follows: Water management: Carry out precise irrigation for the bamboo forest to be covered to meet the water requirements of the bamboo forest at various growth stages; in key periods such as the bamboo shoot differentiation period, the bamboo shoot swelling period and the winter bamboo shoot period, when the soil is dry, irrigation should be carried out in time; before covering the bamboo forest in mid-November, the bamboo shoots need a lot of water to emerge and grow, so they should be watered thoroughly and covered immediately; Fertilizer for row whip: The first fertilizer for row whip is in early May, spreading organic fertilizer 22500kg / hm2; the second fertilizer is in late May, preferably on rainy days, spreading high nitrogen compound fertilizer 300kg / hm2; the third fertilizer is in late June, spreading high nitrogen compound fertilizer 300kg / hm2; the fourth fertilizer is in late July, spreading high nitrogen compound fertilizer 450kg / hm2; the fifth fertilizer is in late August, spreading high nitrogen compound fertilizer 450kg / hm2; Fertilizer for bamboo shoots: In late September, the temperature gradually drops, the growth of bamboo shoots slows down, and it enters the bamboo shoot differentiation period. High-nitrogen compound fertilizer 450kg / hm2 should be applied; Warming fertilizer: Fertilization time is early November. When covering, 7500kg / hm2 of unfermented cake fertilizer and 750kg / hm2 of high potassium compound fertilizer should be applied; Bamboo shoots fertilizer: Fertilization time is at the end of April of the following year. After removing the husk, apply 300kg / hm2 of urea. The application of the above-mentioned compound fertilizer, water and urea is carried out using the aeration fertilization device described in any one of claims 1-7, the depth of the rod (4) into the soil is controlled between 10 and 20 mm; the peak discharge pressure of the rod (4) outlet is 1.5 to 4 atmospheres.

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