A fast-growing technology model for north edge artificial kandelia candel forest

Abstract

This invention relates to the field of plant cultivation technology, specifically to a rapid afforestation technology model for artificial Kandelia candel forests on the northern edge of the plantation, comprising the following steps: Step 1, site selection and terrain treatment; Step 2, hypocotyl pretreatment; Step 3, hypocotyl planting: planting hypocotyls at the planting site, controlling the spacing between plants to 0.5m × 1m; Step 4, tending and management: three months after planting, applying 20g of microbial active bacteria to each Kandelia candel plant, and spraying plant hormones on the leaves of the Kandelia candel once a month; Step 5, calculation of growth indicators. This invention improves root development during the growth process by controlling the spacing between plants, reducing competition among roots, thereby shortening the growth stagnation period, allowing the roots to absorb sufficient nutrients, and thickening the stems. A dedicated planting device allows for precise control of planting depth and spacing, ensuring planting consistency and efficiency.

Description

Technical Field

[0001] This invention relates to the field of plant cultivation technology, specifically to a rapid forestation technology model for artificial Kandelia candel forests in the northern border region. Background Technology

[0002] Kandelia obovata, a typical true mangrove plant belonging to the genus Kandelia in the family Rhizophoraceae, is also the northernmost pioneer species in my country's mangrove ecosystem. Its morphological characteristics are distinctive: the trunk is grayish-brown with buttress roots for support; the leaves are leathery, opposite, obovate to elliptical, with numerous white salt glands on the underside, efficiently secreting excess salt; the flowers are small and yellowish-green, in cymose inflorescences, with flowering concentrated in spring and summer; the fruit is a slender hypocotyl, turning dark purple when mature, and is buoyant enough to be dispersed by tides. As a highly salt-tolerant plant, Kandelia obovata can grow in the intertidal zone with a salinity exceeding 3%, adapting to the marine environment through salt rejection and secretion mechanisms; its viviparous reproduction is unique, with the hypocotyl germinating on the mother plant to form seedlings, which detach and root in the mudflats. Ecologically, Kandelia obovata forests can stabilize riverbanks, purify water, provide habitats for organisms, and absorb carbon dioxide through photosynthesis, making them important contributors to carbon sequestration in coastal wetlands.

[0003] Existing technologies, such as container seedling afforestation, are methods used to shorten the seedling cultivation cycle of Kandelia candel. This involves cultivating Kandelia candel in specific containers filled with nutrient soil, and once they reach transplanting standards, they are transported and planted along with the containers. By protecting the root system within the container to form a complete root ball, this method reduces root damage during seedling removal, transportation, and planting, thereby improving the survival rate of the afforestation.

[0004] While the aforementioned methods can shorten the seedling cultivation period of Kandelia candel, the use of container seedlings restricts root development. After transplanting, these seedlings need to readjust to the soil environment, leading to a prolonged period of stagnation. Furthermore, under dense planting conditions, intense root competition among container seedlings can result in weak stems and poor wind resistance. Therefore, it is necessary to propose a rapid forestation technology model for artificial Kandelia candel plantations on the northern edge of the plantation that can shorten the stagnation period and thicken the stems. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a rapid afforestation technology model for artificial Kandelia candel forests on the northern edge of the plantation. This model improves root development during the growth process by controlling the spacing between plants and rows of Kandelia candel, reducing competition among roots and shortening the growth stagnation period. This allows the roots to absorb sufficient nutrients, resulting in thicker stems.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country, comprising the following steps: Step 1, Site Selection and Topographical Treatment: Select muddy beaches in the intertidal zone as planting sites for Kandelia candel, control the salinity range to 10‰-20‰, and, based on the local average sea level, set the elevation of the planting site to 2.1-2.3m, and clear away debris from the planting site.

[0007] Step 2, hypocotyl pretreatment: Collect mature hypocotyls of Kandelia candel, soak them in local seawater for 1 hour, and prepare a pretreatment solution. Place the hypocotyls in the pretreatment solution for pretreatment.

[0008] The pretreatment solution used is a 0.1%-0.2% potassium permanganate solution and a 0.01%-0.03% imidacloprid solution. When performing the pretreatment operation of the hypocotyl, first soak the hypocotyl in potassium permanganate for 10-15 minutes, then take it out and air dry it. Then soak it in imidacloprid solution for 30 minutes, then take it out and air dry it.

[0009] Step 3, Hypocotyl Planting: Place the hypocotyl in the planting device and plant it at the planting location using the planting device. The distance between the planting points of the hypocotyl is measured by the measuring component in the planting device, and the plant spacing is controlled to be 0.5m × 1m.

[0010] Step 4, nurturing and management: Three months after planting the Kandelia candel, apply 20g of microbial active bacteria to each Kandelia candel plant and spray the leaves with plant hormones once a month.

[0011] Step 5, Calculation of growth indicators: The biomass of Kandelia candel is calculated using the allometric growth equation. At the same time, the carbon density of the sediment at the planting site is calculated. The total carbon density is obtained by using a stratified summation method. Then, based on the total carbon density, the carbon storage is calculated. Based on the annual growth rate of carbon storage and the annual change of Kandelia candel biomass, the forestation rate of Kandelia candel is determined. Among them, the forestation rate of Kandelia candel is positively correlated with the annual growth rate of carbon storage and the annual change of Kandelia candel biomass.

[0012] Furthermore, in step one, the daily immersion time at the planting site is 5-6 hours, the water depth is within 1.5m, and the silt layer is above 0.3m.

[0013] Furthermore, the planting device includes an inoculation cylinder, a handle fixedly connected to the upper part of the outer wall of the inoculation cylinder, a receiving hopper fixedly connected to the top of the inoculation cylinder, and symmetrically hinged opening and closing plates at the bottom of the inoculation cylinder. Steel wire ropes are fixedly connected to the sides of adjacent opening and closing plates that are far from each other. Pull rods are symmetrically hinged to the outer wall of the inoculation cylinder, and return springs are fixedly connected to each pull rod. The end of the return spring away from the pull rod is fixedly connected to the outer wall of the inoculation cylinder, and the end of the pull rod away from the inoculation cylinder is fixedly connected to the adjacent steel wire rope. A limit ring is vertically slidably fitted on the outer wall of the inoculation cylinder, and a measuring component for measuring the distance between planting points of the Kandelia candel hypocotyl is provided on the outer wall of the inoculation cylinder.

[0014] Furthermore, the measuring assembly includes a measuring cylinder fixedly connected to the outer wall of the inoculation tube, a measuring ring rotatably fitted to the bottom wall of the measuring cylinder, a spiral spring plate fixedly connected to the inner side wall of the measuring ring, and the end of the spring plate away from the measuring ring being fixedly connected to the outer wall of the inoculation tube.

[0015] The measuring cylinder has a through hole, and a measuring ruler is fixedly connected to the outer wall of the measuring ring. The end of the measuring ruler away from the measuring ring extends through the through hole to the outside of the measuring cylinder and is fixedly connected to a fixing rod. The fixing rod is in contact with the outer wall of the measuring cylinder in the initial state.

[0016] Furthermore, in step three, the planting time for the hypocotyl is from late April to early June each year, and the planting depth is 1 / 2 to 2 / 3 of the hypocotyl length.

[0017] Furthermore, in step four, the plant hormone is selected from one or more of uniconazole and abscisic acid, and the spraying concentration of the plant hormone is 50 ppm.

[0018] Furthermore, in step five, the formula for the allometric growth equation is as follows: (1).

[0019] in, The biomass of Kandelia candel is expressed in grams. The base diameter of the mangrove is in mm.

[0020] Furthermore, in step five, the sediment carbon density data is calculated using the following formula: (3).

[0021] in, The bulk density of the i-th sediment layer is expressed in g·cm³. -3 ; The organic carbon content of the i-th sediment layer is expressed in g·kg⁻¹. -1 ; denoted as the thickness of the i-th sediment layer in cm; i represents the sediment layering order, with a value range of [1, 7].

[0022] Furthermore, in step five, the formula for calculating carbon reserves is as follows: (4).

[0023] Where A is the forest area of ​​Kandelia candel, in ha, 1 ha = 10000 m².

[0024] The above approach has the following beneficial effects: 1. This invention improves the root development of Kandelia candel by controlling the spacing between plants and rows, reduces competition between roots, shortens the growth stagnation period, and allows the roots to absorb sufficient nutrients, thereby enabling the stem to grow fully and thicken under the influence of nutrients.

[0025] 2. By limiting the salinity range of the planting site and the daily soaking time, this invention can reduce the possibility of physiological stress on Kandelia candel caused by excessive salinity or prolonged soaking. Simultaneously, by limiting the thickness of the silt layer, the silt can provide a stable substrate for the Kandelia candel hypocotyl during planting, thereby improving its wind resistance.

[0026] 3. In the pretreatment of the hypocotyl, the present invention disinfects the surface of the hypocotyl with potassium permanganate and then soaks it in imidacloprid solution, which can kill pathogens and pests on the surface of the hypocotyl at the same time, reduce the possibility of hypocotyl rot and thus improve the survival rate of the hypocotyl.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the method steps in an embodiment of the rapid forestation technology model for artificial Kandelia candel forests in the northern edge of the present invention; Figure 2 This is a schematic diagram of the steps involved in the pretreatment of Kandelia candel hypocotyls in an embodiment of the rapid forestation technology model for artificial Kandelia candel forests in the northern edge of the present invention. Figure 3 This is a schematic diagram illustrating the method steps of Kandelia candel in the tending and management process in an embodiment of the rapid forestation technology model for artificial Kandelia candel forests in the northern edge of the present invention. Figure 4 This is a schematic diagram of the process for determining the forestation rate of Kandelia candel in an embodiment of the rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the present invention; Figure 5 This is an isometric schematic diagram of the planting device in the embodiment of the rapid afforestation technology mode of artificial Kandelia candel forest on the northern edge of the present invention in Example 1; Figure 6 This is a top-section schematic diagram of the measurement component in the embodiment of the rapid forestation technology mode of artificial Kandelia candel forest on the northern edge of the present invention in Example 1; Figure 7 This is an isometric view of the material distribution plate in the planting device in the embodiment of the rapid afforestation technology mode of artificial Kandelia candel forest on the northern edge of the present invention in Example 2; Figure 8 This is a side cross-sectional schematic diagram of the conveyor box in the embodiment of the rapid afforestation technology mode of artificial Kandelia candel forest on the northern edge of the present invention in Example 2.

[0029] The reference numerals in the accompanying drawings of the instruction manual include: 1. Inoculation cylinder; 2. Handle; 3. Receiving hopper; 4. Opening and closing plate; 5. Pull rod; 6. Return spring; 7. Limiting ring; 8. Measuring cylinder; 9. Measuring ring; 10. Spring plate; 11. Measuring ruler; 12. Fixing rod; 13. Material distribution plate; 14. Conveying box; 15. Inclined plate; 16. Support; 17. Connecting rod; 18. Hinge rod; 19. Material distribution block; 20. Toothed plate; 21. Transmission rod; 22. Belt; 23. Guide block. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description illustrates the specific implementation method: Example 1: As attached Figure 1 The diagram illustrates a rapid forestation technology model for artificial Kandelia candel forests on the northern edge of Taiwan, comprising the following steps: Step 1, Site Selection and Topographical Treatment: The staff first selected a muddy beach in the intertidal zone as the planting site for Kandelia candel. At the same time, based on the local average sea level, the elevation of the planting site was controlled at 2.1-2.3m, so that the daily immersion time was 5-6 hours, the water depth was within 1.5m, and the silt layer was above 0.3m.

[0034] Staff controlled the salinity of the planting site to be between 10‰ and 20‰, and cleared the planting site of weeds. After determining the planting location of the mangrove, they cleared away competing weeds and debris within a 1m radius of the planting location.

[0035] Step 2, pretreatment of the embryonic axis: such as Figure 2 As shown, during the terrain treatment, mature hypocotyls of Kandelia candel were collected simultaneously and soaked in local seawater for 1 hour, while a pretreatment solution was prepared. After soaking, the hypocotyls were placed in the pretreatment solution for pretreatment. The pretreatment solution consisted of 0.1%-0.2% potassium permanganate and 0.01%-0.03% imidacloprid solution. During the hypocotyl pretreatment, the hypocotyls were first soaked in potassium permanganate for 15 minutes, then removed and air-dried before being soaked in the imidacloprid solution for 30 minutes, and then air-dried to complete the pretreatment. In this embodiment, the pretreatment was carried out on the shore where the tide could not submerge the hypocotyls, and the potassium permanganate and imidacloprid solutions used for soaking the hypocotyls were collected and treated uniformly to reduce environmental pollution.

[0036] Step 3, Hypocotyl Planting: After the hypocotyl pretreatment, the workers place the hypocotyls in a planting device and plant them at the planting site. Simultaneously, the distance between planting points is measured using a measuring component in the planting device, controlling the spacing between plants to 0.5m × 1m. This ensures dense planting while reducing competition among Kandelia candel roots, shortening its growth stagnation period, and allowing it to absorb nutrients from the soil, promoting stem growth. Planting takes place from late April to early June each year; in this example, it is early May. During planting, the workers also control the planting depth of the hypocotyl to 1 / 2 to 2 / 3 of its length.

[0037] Step four, nurturing and management: such as Figure 3 As shown, three months after planting, staff visited the planting site and applied 20g of active microbial bacteria to each Kandelia candel plant. Simultaneously, staff sprayed the leaves with plant hormones monthly thereafter. The plant hormones used were one or more of uniconazole and abscisic acid; in this example, 50ppm of uniconazole was used.

[0038] Step 5, Growth Index Calculation: During the growth process of Kandelia candel, staff first calculated the biomass using the allometric growth equation, and simultaneously calculated the carbon density of the sediment at the planting site. A stratified summation method was used to obtain the total carbon density. Then, based on the total carbon density, the carbon storage was calculated. Based on the annual growth rate of carbon storage and the annual variation of Kandelia candel biomass, the forestation rate was determined. The entire process is as follows: Figure 4 As shown in the figure, the forestation rate of Kandelia candel is positively correlated with the annual growth rate of carbon storage and the annual variation of Kandelia candel biomass.

[0039] The formula for the allometric growth equation is as follows: (1).

[0040] in, The biomass of Kandelia candel is expressed in grams. The base diameter of the mangrove is in mm.

[0041] The formula for calculating sediment carbon density data is as follows: (3).

[0042] in, The bulk density of the i-th sediment layer is expressed in g·cm³. -3 ; The organic carbon content of the i-th sediment layer is expressed in g·kg⁻¹. -1 ; denoted as the thickness of the i-th sediment layer in cm; i represents the sediment layering order, with a value range of [1, 7].

[0043] The formula for calculating carbon reserves is as follows: (4).

[0044] Where A is the forest area of ​​Kandelia candel, in ha, 1 ha = 10000 m².

[0045] like Figure 5 As shown, in this embodiment, the planting device includes an inoculation cylinder 1. A handle 2 is welded to the upper part of the outer wall of the inoculation cylinder 1. A receiving hopper 3 is integrally formed on the top of the inoculation cylinder 1. Opening and closing plates 4 are symmetrically hinged at the bottom of the inoculation cylinder 1. Steel wire ropes are fixedly connected to the side of adjacent opening and closing plates 4 that are far from each other with screws. Pull rods 5 are symmetrically hinged to the outer wall of the inoculation cylinder 1. A return spring 6 is fixedly connected to the pull rod 5 with screws. The end of the return spring 6 away from the pull rod 5 is fixedly connected to the outer wall of the inoculation cylinder 1 with screws. The end of the pull rod 5 away from the inoculation cylinder 1 is fixedly connected to the adjacent steel wire rope with screws. A limit ring 7 is vertically slidably fitted on the outer wall of the inoculation cylinder 1. A measuring component for measuring the distance between planting points of the Kandelia candel hypocotyl is provided on the outer wall of the inoculation cylinder 1.

[0046] like Figure 6 As shown, the measuring assembly includes a measuring cylinder 8 integrally formed on the outer wall of the inoculation cylinder 1. A measuring ring 9 is rotatably fitted on the inner bottom wall of the measuring cylinder 8. A spiral spring plate 10 is welded to the inner side wall of the measuring ring 9. The end of the spring plate 10 away from the measuring ring 9 is welded to the outer wall of the inoculation cylinder 1.

[0047] A through hole is provided on the measuring cylinder 8. A measuring ruler 11 is fixedly bonded to the outer wall of the measuring ring 9. The end of the measuring ruler 11 away from the measuring ring 9 extends through the through hole and is fixedly bonded to the outside of the measuring cylinder 8 with a fixing rod 12. The fixing rod 12 is in contact with the outer wall of the measuring cylinder 8 in the initial state. In this embodiment, a tape measure is selected as the measuring ruler 11.

[0048] Specifically, after determining the planting position of the Kandelia candel hypocotyl, the staff places the Kandelia candel hypocotyl in the inoculation cylinder 1 through the receiving hopper 3, so that it comes into contact with the opening and closing plate 4, and adjusts the specific position of the limiting ring 7 according to the actual planting depth requirements, moves the planting device to the planting position of the Kandelia candel hypocotyl, and then presses down the handle 2 to press the lower part of the planting device vertically into the soil until the soil surface comes into contact with the limiting ring 7. At this time, the opening and closing plate 4 is located in the soil.

[0049] After the opening and closing plate 4 is inserted, the worker pulls the lever 5, which compresses the return spring 6 and pulls the steel wire rope. The steel wire rope causes the opening and closing plate 4, which is fixed to it with screws, to swing. At this time, the adjacent opening and closing plates 4 move away from each other, forming a channel and clearing away the soil, allowing the mangrove embryo to enter the soil through the channel between the opening and closing plates 4. Then, the worker pulls the handle 2 to remove the planting device as a whole. During this process, the lever 5 moves back to its initial position under the restoring force of the return spring 6, and the opening and closing plates 4 move back to their initial position under their own weight, so that the planting device returns to its initial state.

[0050] When it is necessary to determine the planting spacing of the hypocotyls, the worker pulls out the fixing rod 12 and fixes it at the planting position of one of the Kandelia candel hypocotyls. At this time, the measuring ruler 11 is pulled out by the fixing rod 12. When the planting device is moved to the next planting position, the worker can determine the planting spacing of the hypocotyls by reading the measuring ruler 11. During this process, when the measuring ruler 11 is pulled out, it will cause the measuring ring 9, which is fixedly attached to it, to rotate counterclockwise, and the measuring ring 9 will drive the spring plate 10 to retract. When it is necessary to put the measuring ruler 11 back into the measuring cylinder 8, the worker only needs to release the fixing rod 12. The spring plate 10 will then gradually return to its initial state under its own restoring force. During this process, the spring plate 10 will drive the measuring ring 9 to rotate clockwise, and the rotation of the measuring ring 9 will rewind the measuring ruler 11 back into the measuring cylinder 8.

[0051] The Kandelia candel planted using the method described in this embodiment was used as the experimental group, while the Kandelia candel planted using the container seedling afforestation method was used as the control group. The plots for both the experimental and control groups were located on the same muddy beach, with consistent elevation and soil conditions. Furthermore, all planted Kandelia candels came from the same mother forest, and the meteorological conditions at the time of planting were identical. A comparative experiment was conducted between the experimental and control groups, and the results are shown in the following table: Table 1. Differences in experimental results between the control group and the experimental group. As shown in Table 1, the experimental group had higher survival rate, average plant height, average basal diameter, average biomass per plant, annual carbon storage growth rate, and leaf retention rate after the first overwintering than the control group. Therefore, it can be concluded that the growth of Kandelia candel planted using the experimental method of this embodiment is better than that of Kandelia candel planted using the existing container seedling afforestation method.

[0052] Among these factors, carbon storage is a direct function of biomass and is positively correlated with the growth rate of the stand; the average biomass per tree includes the dry matter accumulation of all parts of the plant, and the faster the accumulation, the faster the tree's metabolism and growth; the increase in basal diameter directly reflects the thickening growth of the stem, and the tree height is the most intuitive indicator of tree growth. Therefore, by comparing the annual growth rate of carbon storage, average biomass per tree, average basal diameter, and average tree height of the experimental group and the control group, it can be found that the experimental group is superior to the control group in all of the above data. Thus, it can be concluded that the Kandelia candel planted using the method of this embodiment has a faster forest formation rate and better growth quality.

[0053] This invention improves root development during the growth of Kandelia candel by controlling the spacing between plants and rows, reducing competition among roots, thereby shortening the growth stagnation period and enabling the roots to absorb sufficient nutrients, resulting in thicker stems.

[0054] Example 2: Unlike the embodiments described above, as Figure 7 and Figure 8 As shown, based on the planting device of Embodiment 1, the planting device of this embodiment also includes a controller, a material distribution plate 13 and a conveying box 14, and the outer wall of the inoculation cylinder 1 is welded to one side of the conveying box 14.

[0055] An inclined plate 15 is bolted to the inner wall of the conveyor box 14. A bracket 16 is bolted to the bottom of the inclined plate 15. Several connecting rods 17 are rotatably connected to the side wall of the bracket 16. One end of each connecting rod 17 passes through the side wall of the bracket 16 and is bolted to a hinge rod 18. The end of the hinge rod 18 away from the connecting rod 17 is hinged to the side wall of the material distribution plate 13. Several material distribution blocks 19 are bolted to the top of the material distribution plate 13. The top of each material distribution block 19 is U-shaped. Toothed plates 20 are bolted to both inner walls of the conveyor box 14 (the distance between the two toothed plates 20 is slightly smaller than the length of the mature embryo shaft, so that the toothed plates 20 can provide stable support for the embryo shaft; the length of the mature embryo shaft is usually more than 15cm. In this embodiment, the distance between the two toothed plates 20 is 13cm). The toothed plates 20 are located on both sides of the material distribution plate 13. Several storage grooves are opened on each toothed plate 20. The end of the toothed plate 20 near the inclined plate 15 is bolted to the inclined plate 15.

[0056] The side wall of the conveyor box 14 has a conveying port. A drive component (a DC motor is used in this embodiment) is bolted to the bracket 16. The output shaft of the drive component is coaxially bolted to a transmission rod 21. The connecting rod 17 is tensioned with the same belt 22 at the end away from the hinge rod 18. The transmission rod 21 is located in the middle of the belt 22 and is in contact with the inner wall of the belt 22. The controller is used to control the operation of the drive component, thereby driving the transmission rod 21 and the belt 22 to rotate.

[0057] A guide block 23 is bolted to the inner wall of the conveyor box 14. The guide block 23 is inclined on the side near the toothed plate 20. The guide block 23 is used to receive the blank shaft that falls from the toothed plate 20 and transfer it to the conveyor port.

[0058] Specifically, in the initial state, the right end of the material distribution plate 13 is located above the rightmost storage trough of the toothed plate 20, and the leftmost blank shaft on the inclined plate 15 will enter the rightmost side of the toothed plate 20 under the action of gravity. The operator puts several blank shafts into the conveyor box 14 at the same time, and the blank shafts will be arranged in sequence under the guidance of the inclined plate 15.

[0059] After the blank shaft is placed, the user can start the drive unit through the controller. The output shaft of the drive unit will drive the transmission rod 21 to rotate counterclockwise, which in turn drives the belt 22 to rotate counterclockwise. Since the connecting rod 17 tensions the belt 22, the belt 22 will drive the connecting rod 17 to rotate counterclockwise synchronously. The connecting rod 17 will drive the hinge rod 18 to rotate counterclockwise. Since the material distribution plate 13 is hinged to the hinge rod 18, when the hinge rods 18 on both sides rotate counterclockwise, they will drive the material distribution plate 13 and the material distribution block 19 to rotate counterclockwise. Since the rotation angle of the hinge rods 18 on both sides is the same, the material distribution plate 13 and the material distribution block 19 will remain in a horizontal state during the rotation, which is convenient for the subsequent smooth conveying of the blank shaft.

[0060] When the material distribution plate 13 and the material distribution block 19 rotate counterclockwise upwards, the material distribution block 19 will drive the blank shaft to rise upwards and move to the left, leaving the current storage trough. When the material distribution plate 13 and the material distribution block 19 rotate counterclockwise downwards, the material distribution block 19 will drive the blank shaft to move downwards and to the left, entering the left storage trough, thereby transferring the blank shaft. Whenever the blank shaft on the leftmost side of the inclined plate 15 is transferred away, the next blank shaft will automatically fill the rightmost side of the toothed plate 20 under the action of gravity. The material distribution plate 13 and the material distribution block 19 rotate continuously. Several embryo shafts will be evenly and independently transported to each storage tank. When the embryo shaft is transported to the leftmost side of the toothed plate 20, the embryo shaft will lose the support of the toothed plate 20. One side of the embryo shaft will first contact the top of the guide block 23 and be blocked by it. The other side of the embryo shaft will continue to move downward with the material distribution block 19. At this time, the embryo shaft will be in an inclined state and slide onto the guide block 23. It will slide along the surface of the guide block 23 to the conveying port and fall into the inoculation cylinder 1 of the planting device in Embodiment 1 through the conveying port, and be stored in the conical space formed by the opening and closing plate 4.

[0061] After the embryonic shaft falls into the conical space formed by the opening and closing plate 4, the staff can carry out the embryonic shaft planting operation of Example 1, which is the same as the operation method in Example 1.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rapid afforestation technology model for artificial Kandelia candel forests on the northern edge of the country, characterized in that, Includes the following steps: Step 1, Site Selection and Topographical Treatment: Select muddy beaches in the intertidal zone as planting sites for Kandelia candel, control the salinity range to 10‰-20‰, and at the same time, based on the local average sea level, set the elevation of the planting site to 2.1-2.3m, and clear away debris from the planting site. Step 2, hypocotyl pretreatment: Collect mature hypocotyls of Kandelia candel, soak them in local seawater for 1 hour, and prepare a pretreatment solution. Place the hypocotyls in the pretreatment solution for pretreatment. The pretreatment solution used is a 0.1%-0.2% potassium permanganate solution and a 0.01%-0.03% imidacloprid solution. When performing the pretreatment operation of the hypocotyl, first soak the hypocotyl in potassium permanganate for 10-15 minutes, then take it out and air dry it. Then soak it in imidacloprid solution for 30 minutes, then take it out and air dry it. Step 3, Hypocotyl Planting: Place the hypocotyl in the planting device and plant it at the planting site. The distance between the planting points of the hypocotyl is measured by the measuring component in the planting device to control the plant spacing to be 0.5m × 1m. Step 4, nurturing and management: Three months after planting the autumn eggplant, apply 20g of microbial active bacteria to each plant, and spray the leaves of the autumn eggplant with plant hormones once a month. Step 5, Calculation of growth indicators: The biomass of Kandelia candel is calculated using the allometric growth equation. At the same time, the carbon density of the sediment at the planting site is calculated. The total carbon density is obtained by using a stratified summation method. Then, based on the total carbon density, the carbon storage is calculated. Based on the annual growth rate of carbon storage and the annual change of Kandelia candel biomass, the forestation rate of Kandelia candel is determined. Among them, the forestation rate of Kandelia candel is positively correlated with the annual growth rate of carbon storage and the annual change of Kandelia candel biomass.

2. The rapid afforestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 1, characterized in that, In step one, the planting site is submerged for 5-6 hours per day, with a water depth of less than 1.5m and a silt layer of more than 0.3m.

3. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 2, characterized in that, The planting device includes an inoculation cylinder (1), a handle (2) is fixedly connected to the upper part of the outer wall of the inoculation cylinder (1), a receiving hopper (3) is fixedly connected to the top of the inoculation cylinder (1), and opening and closing plates (4) are symmetrically hinged at the bottom of the inoculation cylinder (1). Steel wire ropes are fixedly connected to the side of the adjacent opening and closing plates (4) that are far away from each other. Pull rods (5) are symmetrically hinged to the outer wall of the inoculation cylinder (1), and return springs (6) are fixedly connected to the pull rods (5). The end of the return spring (6) away from the pull rod (5) is fixedly connected to the outer wall of the inoculation cylinder (1), and the end of the pull rod (5) away from the inoculation cylinder (1) is fixedly connected to the adjacent steel wire rope. A limit ring (7) is vertically slidingly fitted on the outer wall of the inoculation cylinder (1). A measuring component for measuring the distance between planting points of the eggplant embryo is provided on the outer wall of the inoculation cylinder (1).

4. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 3, characterized in that, The measuring assembly includes a measuring cylinder (8) fixedly connected to the outer wall of the inoculation cylinder (1), a measuring ring (9) rotatably fitted to the inner bottom wall of the measuring cylinder (8), a spiral spring plate (10) fixedly connected to the inner side wall of the measuring ring (9), and the end of the spring plate (10) away from the measuring ring (9) fixedly connected to the outer wall of the inoculation cylinder (1). A through hole is opened on the measuring cylinder (8), and a measuring ruler (11) is fixedly connected to the outer wall of the measuring ring (9). The end of the measuring ruler (11) away from the measuring ring (9) extends through the through hole to the outside of the measuring cylinder (8) and is fixedly connected to a fixing rod (12). The fixing rod (12) is in contact with the outer wall of the measuring cylinder (8) in the initial state.

5. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 4, characterized in that, In step three, the hypocotyl is planted from late April to early June each year, at a depth of 1 / 2 to 2 / 3 of its length.

6. The rapid afforestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 5, characterized in that, In step four, one or more of the plant hormones, namely acetonitrile and abscisic acid, are selected, and the spraying concentration of the plant hormone is 50 ppm.

7. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 6, characterized in that, In step five, the formula for the allometric growth equation is as follows: （1）； in, The biomass of Kandelia candel is expressed in grams. The base diameter of the mangrove is in mm.

8. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 7, characterized in that, In step four, the plant hormone is prepared by mixing acetonitrile and abscisic acid in a mass ratio of 1:1, and the spraying time is a sunny and windless morning in the middle of each month.

9. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 8, characterized in that, In step five, the sediment carbon density data is calculated using the following formula: （3）； in, The bulk density of the i-th sediment layer is expressed in g·cm³. -3 ; The organic carbon content of the i-th sediment layer is expressed in g·kg⁻¹. -1 ; denoted as the thickness of the i-th sediment layer in cm; i represents the sediment layering order, with a value range of [1, 7].

10. The rapid forestation technology model for artificial Kandelia candel forests on the northern edge of the country as described in claim 9, characterized in that, In step five, the formula for calculating carbon reserves is as follows: （4）； Where A is the forest area of ​​Kandelia candel, in ha, 1 ha = 10000 m².

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