High-yield planting method for pearl plums

Abstract

The invention discloses a high-yield planting method for pearl plum saplings, which comprises the following steps: (1) selecting a planting field, and digging planting pits; (2) sterilizing the pearl plum saplings and then planting the pearl plum saplings; (3) performing tree form management on the pearl plum trees; (4) planting soil management; (5) topdressing management; (6) pest control management; and (7) harvesting. According to the planting method, green manure plants are sown between rows of pearl plum tree seedlings for soil ripening, so that the soil structure and the soil fertility are improved, the growth of pearl plum trees is promoted, and the crop yield is increased; pearl plum trees are trimmed and shaped in different growth periods, so that the pearl plum trees can utilize nutrition to the maximum extent, and the fruit setting rate and the fruit yield are increased; the nutrient requirements of the pearl plum trees are met through refined fertilization, it is guaranteed that the pearl plum trees grow fully, the fruit yield is increased accordingly, the average harvest amount of each pearl plum tree every year is 55 kg or above, the average weight of each pearl plum fruit is 23 g or above, and the soluble solid content reaches 14% or above.

Description

Technical Field

[0001] The invention relates to the technical field of plum planting, in particular to a high-yield planting method for pearl plums. Background Art

[0002] With the development of economy and the improvement of people's living standards, the demand for high-quality fruits is growing. As a fruit with rich nutrition and good taste, the demand for pearl plum in the market is increasing. In order to gain an advantage in the market, farmers and enterprises need to continuously improve planting efficiency and product quality to meet the needs of consumers, so a high-yield planting method of pearl plum is needed.

[0003] Chinese patent CN202210237677.1 provides a method for planting plums, which includes: (1) site selection, (2) land preparation, (3) planting, (4) seedling management, (5) adult fruit tree management, (6) pest and disease control, etc. The invention improves and optimizes the soil in the planting pit, which is beneficial to the water and fertilizer retention of the plants, avoids soil compaction, and is beneficial to the roots of the trees to absorb nutrients, which is suitable for the growth of plums; through refined water and fertilizer management, the water, fertilizer and other nutritional needs of plum growth are met, and the fruit trees can continue to produce high and stable yields year after year, and the fruit color and taste are good. However, the invention only improves and optimizes the soil through agricultural fertilizers, lacks a more environmentally friendly soil improvement method to improve the yield and quality of plums, and does not use different pruning methods for plums at different growth stages to improve the fruit setting rate and plum quality. Summary of the invention

[0004] The main purpose of the present invention is to overcome the defects of the above-mentioned background technology and provide a high-yield planting method of pearl plum, which can enhance the fertility of the soil and increase the yield of pearl plum.

[0005] To achieve the above object, the high-yield planting method of pearl plum proposed by the present invention comprises the following steps:

[0006] Step 1: Choose a deep, fertile and well-lit soil as the planting site. After cleaning the planting site, dig out a planting pit. After drying and disinfecting the pit, backfill the planting pit. When backfilling, add topsoil to the bottom of the planting pit, and continue to add new soil to 2 / 3 of the planting pit. Then spread decomposed farmyard manure and phosphate fertilizer, and then add new soil until it exceeds the planting pit, forming a steamed bun or dumpling-shaped fruit tree tray;

[0007] Step 2: Select 1-2 year old seedlings with a height of 70-120 cm, strong stems, full buds, well-developed root systems, and no pests and diseases as planting seedlings. Before planting, disinfect and treat the roots of the seedlings, then plant them in the fruit tree tray, cover them with soil, and water them to establish roots;

[0008] Step 3: Tree shape management: After the pearl plum seedlings turn green and survive in the fixed year, the young trees are shaped and pruned. In the summer budding period, the buds below the shaping zone are removed. In winter, two or three main branches are left on the trunk as the main tree shape of the pearl plum tree for pruning. In the summer of the second year, side branches are selected, the outer vigorous branches are controlled, and the long branches are thinned out. In the winter of the second year, the extended branches of the main branches are cut short. In the third year, the pruning steps of the second year are repeated. After 3-4 years, the tree shape can be formed. After that, short pruning, shortening, sprout removal, thinning and branch pulling operations are carried out every summer and winter according to the production situation of the pearl plum tree. In the bud stage, the flower branches of the pearl plum seedlings are thinned out to reduce the number of flower branches. After six to seven years, it will enter the peak fruit-bearing period with a large number of fruits;

[0009] Step 4: Planting soil management: Sow green manure crops between the rows of pearl plum trees every year, and after harvesting the green manure crops, deep plowing and soil improvement are carried out. The straw of the green manure crops is buried and basal fertilizer is applied. In the first year, side ditches are dug outward along the original planting pit. In the second year, fertilizer ditches of the same depth and width are dug outward along the first expanded ditch on the other two pairs of sides, so as to deepen the pit and expand it year by year to mature the soil;

[0010] Step 5: Topdressing management: During the growth stage of the pearl plum tree, dig a ditch under the projection range of the tree canopy, apply nitrogen, phosphorus and potassium fertilizers in the ditch and cover with soil, apply bud fertilizer during the budding growth stage, apply flowering fertilizer during the simultaneous growth stage of young fruits and new shoots, apply fruit-strengthening fertilizer after the second physiological fruit drop, apply fruit-harvesting fertilizer before fruit-harvesting, and apply post-harvest fertilizer after fruit-harvesting;

[0011] Step 6: Pest and disease control management: Spray the prepared lime-sulfur mixture on the pearl plum trees during the bud expansion stage; spray the flower inhibitor 7-10 days before the buds bloom in rainy weather to reduce the impact of weather on flowering, pollination and fertilization. Check the growth of the plants regularly, find pests and diseases, and take targeted measures in time. Use insect traps to control pests on the pearl plum trees, remove the damaged dead fruits in time and eliminate the fallen insect fruits to prevent the spread of pests and diseases.

[0012] Step 7: Pick the fruits that are 90% ripe from the pearl plum trees. Handle the fruits with care, reduce turning, and try to retain the fruit powder. After picking the fruits, shallowly till the soil throughout the garden and apply 150 kilograms of lime per acre. Repeat steps 3 to 7 every year.

[0013] Furthermore, in step three, when the pearl plum tree is pruned with three main branches, the first main branch faces north, the angle of the first main branch is 60° to 70°, the second main branch faces southwest, the angle of the main branch is 40° to 50°, the third main branch faces southeast, the angle of the main branch is 40° to 50°, and the spacing between the first main branch, the second main branch and the third main branch is 15 cm.

[0014] Furthermore, in step three, when the pearl plum tree is pruned with two main branches, the two main branches extend in the east-west direction, the angle between the two main branches is 60°, and the distance between the branches is 10-15 cm.

[0015] Furthermore, when the extension branches of the main branches are shortened in the winter of the second year, 1 / 2 of the branches are cut off. At the same time, the first side branch is selected 50 cm upward from the base of the main branch, and the second side branch is selected in the opposite direction of the first side branch. 2-3 side branches are cultivated on each main branch.

[0016] Furthermore, after entering the peak fruit-bearing period, the pearl plum trees are pruned 3-5 times every summer. The first pruning is done during the budding period in early spring to remove buds with incorrect directions or weak buds in double buds; the second pruning is done after the flowers have faded, combined with flower thinning to remove overly dense branches; the third pruning is done after the core is hardened to shorten the vigorously growing branches; the fourth or fifth pruning is done in early or late autumn to pinch back or thin out the excessively growing side shoots and pinch the long fruit branches.

[0017] Furthermore, in step 4, the green manure crop includes any one of leguminous plants, dry seedlings, potatoes, and Chinese cabbage.

[0018] Further, in step five, the bud fertilizer is mainly quick-acting nitrogen fertilizer, which can be fertilized with decomposed manure and urea, or 1.5-2 catties of compound fertilizer per plant, or 50 catties of decomposed human feces and urine per plant, or 30-60 catties of flushing fertilizer per mu, or 0.3% urine + 0.2% potassium dihydrogen phosphate + 0.2% borax or 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times flower fruit solution + 500 times leaf um solution for foliar spraying, and spraying twice during the flowering period, each time with an interval of 15 days; the flowering fertilizer is mainly nitrogen and potassium fertilizer, 30-60 catties of flushing fertilizer per mu, or 2-3 catties of compound fertilizer per plant, or 0.2% potassium dihydrogen phosphate + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times sweet The fruit-enhancing fertilizer is mainly nitrogen, phosphorus and potassium fertilizers, and 80-100 jin of compound fertilizer is applied per mu, or 30-60 jin of flushing fertilizer is applied per mu, or 0.2% potassium dihydrogen phosphate + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times sodium cyclamate solution + 500 times leaf solution is used for foliar spraying, and spraying is carried out 2-3 times in a row, with an interval of 15 days each time; the fruit-picking fertilizer is mainly phosphorus and potassium fertilizer, and 100-200 jin of human and livestock fertilizer is applied to each plant, or 50-800 jin of compound fertilizer is applied per mu, or 0.2% potassium dihydrogen phosphate + 500 times leaf solution is used for foliar spraying once; the post-harvest fertilizer is mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizers, and 1kg urea or 2kg ammonium bicarbonate or 2kg human feces and urine is applied to each plant, and watering is carried out in time.

[0019] Furthermore, in step six, the lime-sulfur mixture comprises the following raw material components in parts by weight: 2.5 parts of quicklime, 5 parts of sulfur powder, and 20 or 25 parts of water.

[0020] Furthermore, in step six, the flower inhibitor is sprayed using any one of maleic hydrazide, bud inhibitor, naphthylacetic acid, and potassium naphthylacetate.

[0021] Further, in step six, the insect luring device includes a charge shell and a shielding cover, the charge shell is cylindrical and hollow, a twisting cover is rotatably installed on the bottom end of the charge shell, an upper mounting track and a lower mounting track are arranged on the outer surface of the charge shell, the upper mounting track is connected to the inside of the charge shell, the shielding cover is fixed to the top end of the charge shell, and a fixing hook is arranged on the top surface of the shielding cover.

[0022] Further, in step six, the insect-attracting device includes a charge shell and a shielding cover, the charge shell is cylindrical and hollow, a twisting cover is rotatably installed on the bottom end of the charge shell, an upper mounting track and a lower mounting track are arranged on the outer surface of the charge shell, the upper mounting track is connected to the interior of the charge shell, an adhesive plate is clamped between the upper mounting track and the lower mounting track, the shielding cover is fixed to the top end of the charge shell, and a fixing hook is arranged on the top surface of the shielding cover.

[0023] The beneficial effects of the present invention include: maturing the soil by sowing green manure plants between the rows of pearl plum trees, improving the soil structure and increasing the soil fertility, promoting the growth of pearl plum trees, and increasing the crop yield; pruning the pearl plum trees at different growth stages to maximize the use of nutrients by the pearl plum trees, and increasing the fruit setting rate and fruit yield; satisfying the nutritional needs of the pearl plum trees through fine fertilization to ensure that the pearl plum trees grow fully and thus increase the fruit yield; reducing the damage of pests to the pearl plum trees through insect traps to ensure that the pearl plum trees develop completely at all stages and increase the yield; and adopting the present invention to plant, each pearl plum tree can harvest more than 55 kg per year on average, the average weight of a single pearl plum fruit is more than 23 g, and the soluble solid content reaches more than 14%. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the high-yield planting method of pearl plum in an embodiment of the present invention.

[0025] Figure 2 The present invention relates to a pearl plum sapling with a main tree shape having two main branches.

[0026] Figure 3 The invention relates to a pearl plum sapling with three main branches in the main tree shape.

[0027] Figure 4is a schematic structural diagram of an insect attractant device in an embodiment of the present invention;

[0028] Description of the drawings: 10 insect trap; 11 charge housing; 12 shielding cover; 13 twisting cover; 14 upper mounting track; 15 lower mounting guide rail; 16 fixing hook; DETAILED DESCRIPTION

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] A high-yield planting method for pearl plum disclosed in one embodiment includes the following steps: Step 1: Select soil with deep soil layer, fertile soil and good light as the planting site, the soil has good drainage and irrigation, and the pH value is between 5.6-6.5, and the planting site is cleaned and a planting pit is dug out. The planting pit specification is 0.7mX0.7mX0.6m, and the pit distance is 4m. After the pit is dried and disinfected, the planting pit is backfilled. When backfilling, after the topsoil is fed into the bottom of the planting pit, new soil is continuously fed into 2 / 3 of the planting pit, and then decomposed farmyard manure and phosphate fertilizer are laid, and new soil is fed until it exceeds 50cm of the planting pit, and a steamed bun or dumpling shaped fruit tree tray is formed. By sun-drying and disinfecting the planting pit, the viruses in the planting pit can be disinfected and the pathogens in the planting pit can be reduced. After the disinfection is completed, by laying decomposed farmyard manure and a small amount of phosphate fertilizer at 2 / 3 of the planting pit and forming the planting pit into a steamed bun or dumpling shaped fruit plate, the soil fertility can be improved and water evaporation can be reduced. It can also promote the development of the root system while protecting the root system when the pearl plum seedlings are planted in the planting pit.

[0033] Step 2: Select 1-2 year old seedlings that are 70-120 cm tall, with thick stems, full buds, developed root systems, and no diseases and insect pests as planting seedlings, and plant them in February and March. Disinfect and root-pump the seedlings before planting. Use organic acids for disinfection, such as acetic acid and citric acid to soak for 5 minutes, then dry naturally, and then perform root-pump treatment. The root-pump liquid used for root-pumping is 50 parts of soil, 20 parts of humus, 10 parts of sand, 10 parts of lime, 5 parts of JT composite bacteria and 5 parts of rooting powder by weight, mix them, add appropriate amount of water and stir evenly. The concentration of the root-pump liquid can be sticky and drip slowly. After rooting, plant them in a fruit tree tray, cover them with a 5 cm thick soil layer, pour rooting water on them, cover them with ground film, and then cover the ground film with straw. By disinfecting the pearl plum seedlings, the occurrence of insect pests in the pearl plum seedlings can be effectively reduced. Pulping the roots of the pearl plum seedlings before placing them in the planting pits can greatly increase the survival rate of the pearl plum seedlings and promote root growth. At the same time, watering with rooting water can reduce the adaptation period of the pearl plum seedlings and further increase the survival rate.

[0034] Step 3: Tree shape management: After the pearl plum seedlings turn green and survive in the same year, the young trees are shaped and pruned. In the summer budding period, the buds below the shaping zone are removed. In winter, two or three main branches are retained on the trunk as the main tree shape of the pearl plum tree for pruning. When the pearl plum tree is pruned with three main branches, the first main branch faces north with an angle of 60° to 70°, the second main branch faces southwest with an angle of 40° to 50°, and the third main branch faces southeast. The angle of the main branch is 40° to 50°, and the spacing between the first main branch, the second main branch and the third main branch is 15cm; when the pearl plum tree is pruned with two main branches, the two main branches extend in the east-west direction, the angle between the two main branches is 60°, and the branch spacing is 10-15cm; in the summer of the second year, side branches are selected, the outer vigorous branches are controlled, and the long branches are thinned out. In the winter of the second year, the extended branches of the main branches are shortened. When shortening the extended branches of the main branches, 1 / 2 of the branches are cut off. At the same time, the first side branch is selected 50cm upward from the base of the main branch, and the second side branch is selected in the opposite direction of the first side branch. 2-3 side branches are cultivated on each main branch. The pruning steps of the second year are repeated in the third year. After 3-4 years, the tree shape can be formed. Thereafter, shortening, shortening, removing sprouts, thinning shoots and pulling branches are carried out every summer and winter according to the growth of the pearl plum tree. In the bud stage, the flower branches of the pearl plum seedlings are thinned out to reduce the amount of flower branches. After six to seven years, After entering the peak fruit-bearing period, the pearl plum tree should be pruned 3-5 times every summer. The first pruning is done during the budding period in early spring to remove buds with incorrect directions or weak buds in double buds. The second pruning is done after the flowers have faded, combined with flower thinning to remove overcrowded branches. The third pruning is done after the core is hardened to shorten the vigorously growing branches. The fourth or fifth pruning is done in early or late autumn to pinch back or thin out the excessively growing side shoots and pinch the long fruit branches.By shaping and pruning the pearl plum trees, that is, dividing the pearl plum trees into two main branches or three main branches based on the planting environment, the pearl plum trees with three main branches have a stronger skeleton and are easier to cultivate. The distance between the three main branches is 15 cm, the angles of the first main branch are 60°, 65° and 70°, and the optimal angle is 65°. The angles of the second main branch are 40°, 45° and 50°, and the optimal angle is 45°. The angles of the third main branch are 40°, 45° and 50°, and the optimal angle is 45°. By limiting the distance and angle of the three main branches, it can ensure that each main branch is well illuminated, achieving high and stable yields. The pearl plum trees with two main branches The tree is easy to cultivate, with the spacing between the two main branches being 15cm, 17cm and 20cm, with the optimal spacing being 17cm. It is suitable for high-density cultivation and has strong early yield. By performing pruning, shortening, sprout removal, shoot thinning and branch pulling based on the situation of the pearl plum tree, the growth of each branch of the pearl plum tree can be changed, and unnecessary side branches or buds can be removed, which can better adjust the nutrient distribution of the pearl plum tree, strengthen the growth of the main branches, side branches and the entire tree, and effectively reduce nutrient waste. Pulling and twisting branches are used to deal with improperly developed branches, which can improve the light conditions inside the crown, facilitate the ripening of the fruit, and make the fruit fuller and more colorful.

[0035] Step 4: Planting soil management: Sow green manure crops between the rows of pearl plum trees every year, and after harvesting the green manure crops, deep plowing and expanding the pit to improve the soil, bury the straw of the green manure crops and apply base fertilizer. In the first year, dig side ditches along the original planting pit, and in the second year, dig the same deep and wide fertilizer ditches along the other two pairs of sides along the first expanded ditch, so as to deepen the pit and expand it year by year to mature the soil. Green manure crops include any one of legumes, dry seedlings, potatoes, and mustard greens. Legumes, dry seedlings or potatoes are interplanted in spring every year, and mustard greens are interplanted in autumn. Through planting management of the soil, by burying the roots of the harvested green manure crops and applying basal fertilizer, and digging fertilizer trenches along the original planting pits, after the green manure crops are harvested in the second year, the roots will continue to be buried and basal fertilizer will be applied, and fertilizer trenches will be dug along the other two pairs of sides of the first expanded trench. The above operations are performed year by year until the soil improvement of the entire garden is completed. The soil can be matured to improve the soil structure, increase soil fertility, ensure that the pearl plum trees can obtain sufficient nutrition, and increase the yield and quality of the pearl plum trees.

[0036] Step 5: Topdressing management: During the growth stage of the pearl plum tree, dig a ditch under the projection range of the crown, apply nitrogen, phosphorus and potassium fertilizers in the ditch and cover the soil. Apply bud fertilizer in the bud growth stage. The bud fertilizer is mainly quick-acting nitrogen fertilizer. Fertilizer can be applied with decomposed manure water and urea, or 1.5-2 catties of compound fertilizer per plant, or 50 catties of decomposed human feces and urine per plant, or 30-60 catties of flushing fertilizer per mu, or before flowering, use 0.3% urine + 0.2% potassium dihydrogen phosphate + 0.2% borax or 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times flower fruit solution + 500 times leaf solution for foliar spraying. Spray twice during the flowering period, with an interval of 15 days each time; apply flowering fertilizer when young fruits and new shoots are growing at the same time. The flowering fertilizer is mainly nitrogen and potassium fertilizers. 30-60 kg of flushing fertilizer can be applied per mu, or 20-30 catties of fertilizer can be applied per plant. 2-3 jin of compound fertilizer, or spray foliage with 0.2% potassium dihydrogen phosphate + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times cyclamate solution + 500 times leaf solution once; after the second physiological fruit drop, apply fruit-strengthening fertilizer and thin the fruit at the same time. The fruit-strengthening fertilizer mainly includes nitrogen, phosphorus and potassium fertilizers. Apply 80-100 jin of compound fertilizer per mu, or apply 30-60 jin of flushing fertilizer per mu, or spray foliage with 0.2% potassium dihydrogen phosphate + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times cyclamate solution + 500 times leaf solution. Spray 2-3 times in a row, with an interval of 15 days each time. Thinning the fruit of the pearl plum tree can remove poorly developed fruits in advance, allow the retained fruits to obtain more nutrients, and the fruit quality is better. In the pre-fruit-harvest stage, fruit-harvest fertilizer is applied, which mainly consists of phosphorus and potassium fertilizers. 100-200 kilograms of human and animal fertilizers are applied to each plant, or 50-800 kilograms of compound fertilizers are applied per mu, or 0.2% potassium dihydrogen phosphate + 500 times leaf solution is used for foliar spraying once; in the post-fruit-harvest stage, post-harvest fertilizer is applied, which mainly consists of nitrogen fertilizer, combined with phosphorus and potassium fertilizers. 1kg of urea or 2kg of ammonium bicarbonate or 2kg of human feces and urine are applied to each plant, and watering is done in time. This can replenish the nutrients consumed by the tree during the fruiting period, help the tree recover its health, and improve the tree's ability to resist the cold over the winter. Shallow tillage of the entire garden and lime can effectively improve the soil's thermal insulation, which helps the pearl plum tree maintain ground temperature in cold seasons and promotes root development. At the same time, potassium chloride is applied to supplement the elements required by the pearl plum tree and promote plant growth. Based on the fertilization needs, the use of any of the following methods, including ring ditch fertilization, strip ditch fertilization, radial ditch fertilization and whole garden fertilization, can effectively improve the utilization rate of fertilizers and promote the growth of crops. By applying different fertilizer formulas at different stages of the pearl plum, it is possible to add nutrients to the pearl plum trees during the growth period, meet the growth needs of the pearl plum trees, and increase the survival rate, fruit setting rate, and fruit quality of the pearl plum trees, making the yield more stable.

[0037] Step 6: Disease and pest control management: During the bud swelling stage of the pearl plum tree, spray the prepared lime-sulfur mixture all over the tree. The lime-sulfur mixture, measured by weight, includes the following raw materials: 2.5 parts of quicklime, 5 parts of sulfur powder, and 20 or 25 parts of water. In rainy weather, spray the flower inhibitor 7-10 days before the buds bloom. The flower inhibitor can be sprayed with any one of maleic hydrazide, bud inhibitor, naphthylacetic acid, and potassium naphthylacetate to reduce the impact of weather on flowering, pollination, and fertilization. Check the growth of the plants regularly. When diseases and pests are found, take targeted measures in a timely manner, remove the damaged and dead fruits in time, and eliminate the fallen insect fruits to prevent the spread of diseases and pests. The main diseases include anthrax, leaf blight, bacterial root cancer, gummosis, red spot disease, plum rust, and bacterial perforation disease. The main pests include peach borer, aphids, fruit borer, fruit fly, and fruit moth. The prevention and control measures for anthrax and leaf blight include: ① Winter garden cleaning. After the pearl plum leaves fall and before budding, the garden should be cleaned in combination with winter pruning, and the whole garden should be sprayed with a mixture of lime sulfur at 5 degrees Baume and 300 times sodium pentachlorophenol. Spray once a month and spray twice in a row to eliminate overwintering pathogens and reduce the source of infection. ② In winter, apply 20-30 kilograms of decomposed farmyard manure or 6-10 kilograms of commercial chicken manure plus 1.6 kilograms of 45% or more high-efficiency compound fertilizer to each plant. ③ Repeatedly cut off the diseased dead branches, curled leaves, diseased tips and diseased fruits from the time the pearl plum buds sprout to the time before and after flowering to prevent the diseased parts from producing spores and infecting the fruit trees again. ④ Spray the whole tree evenly with 1:1:100 Bordeaux liquid during the bud sprouting period. ⑤ During the period of young fruit expansion until the fruit is ripe, use Lepudao + Kangsheng + agricultural streptomycin + methyl thiophanate + insecticide + scale insects + No. 1 Gong + imidacloprid + potassium dihydrogen phosphate + golden potassium + active boron + efficient pure zinc + Lifengle (flower and fruit essence or sweet essence) + high potassium and high calcium (Luofengwang) + Yemu (or Luofengwang or Shuangxiaowang) to evenly spray the pearl plum and the soil of the root distribution layer 50-100cm around the ground of the stem base. ⑥ During the period of autumn sprouting of pearl plum, use Lepudao + Kangsheng + agricultural streptomycin + methyl thiophanate + insecticide + scale insects + No. 1 Gong + imidacloprid + potassium dihydrogen phosphate + golden potassium + active boron + efficient pure zinc + Lifengle (flower and fruit essence or sweet essence) + high potassium and high calcium + Yemu (or Luofengwang or Shuangxiaowang) to evenly spray the pearl plum and the soil of the root distribution layer 50-100cm around the ground of the stem base. The prevention and control measures for bacterial root cancer include: ① Check whether the seedlings are diseased before planting, and soak the parts below the grafting point of the seedlings in 1% copper sulfate solution for 5 minutes, and then soak them in 2% lime water for 1 minute. ② Apply more acidic fertilizers or organic fertilizers to appropriately increase the acidity of the soil to create an external environment that is not conducive to bacterial growth. ③ Scrape off the tumor site after it is found, disinfect it with 100 times copper sulfate solution or 50 times 402 antibacterial agent, or 100 times 80% nitro-o-formic acid sodium salt solution, or lime sulfur mixture residue, or 400 units of streptomycin, and then apply vaseline for protection.The prevention and control measures for gummosis include: ① Reduce tree damage, timely control of branch and trunk diseases and pests, avoid frostbite and sunburn, reduce branch and trunk trauma, strengthen soil, fertilizer and water management, improve tree trunk disease resistance, and whitewash branches and large branches in autumn. ② Scrape off the diseased parts before budding in early spring, apply 5 degrees Baume lime sulfur mixture or spray the tree with 75% thiophanate-methyl 800 times solution, 1500 times solution of methyl thiophanate wettable powder in the growing season in combination with other disease prevention and control. The prevention and control measures for red spot disease include: ① Reduce the humidity in the orchard, and thoroughly remove the diseased leaves and fruits in the orchard in autumn, burn or bury them in a centralized manner, and eliminate the source of overwintering bacteria. ② Spray 1:1:160 times Bordeaux mixture before the disease occurs. ③ Spray 50% methyl thiophanate wettable powder 700 times solution or 70% mancozeb wettable powder 500 times solution, 25% benomyl emulsifiable concentrate 800 times solution in the early stage of the disease. The prevention and control measures for plum rust include: ① Choose a place far away from pine needle forests as the planting site for pearl plum. ② Use 100 times of 45% mancozeb aqueous solution and 400-600 times of 65% mancozeb or 1000 times of 15% triadimefon or 500 times of thiamethoxam or 200 times of sodium dithiocarb to spray the tree crown, once every half a month, for a total of 2-3 times. Or spray 1:1:170 Bordeaux mixture. ③ Use 0.3-0.5 degree Baume lime sulfur mixture to spray and clean the garden in winter. The prevention and control measures for bacterial perforation include: ① Choose loose texture, sandy loam with high organic matter content, low groundwater level, good drainage, sheltered from the wind and sunny hillside or mountain bay with deep soil layer as the planting site. ② The fruit tree plate is 50 cm higher than the bed surface and drainage ditches are opened around it to prevent water accumulation in the garden and at the base of the plants, to avoid root rot and death or high humidity and easy disease. ③ Strictly follow steps 3 and 5 for pruning and fertilizing. ④ After winter pruning, clean the garden with 5-degree Baume lime sulfur mixture. When buds sprout in spring, spray again with 3-degree lime sulfur mixture to kill overwintering pathogens. ⑤ Spray with 2000 times solution of 72% agricultural streptomycin soluble powder, 2000 times solution of phytosporin, 500 times solution of Fumeishuang, or 400 times solution of mancozeb from early April to late June and late August to late September. Prevention and control measures for peach borer include: ① Timely treatment of straw crop residues, timely removal of wasps and fallen fruits, and elimination of overwintering insect sources. ② Use black light to lure and kill. ③ In mid-April and late April, sex attractants are used to monitor the peak period of adult occurrence, and combined with egg inspection, when the egg-fruit rate reaches 1%, 50% cypermethrin EC 1000 times liquid or 20% cypermethrin EC 2500 times liquid or 20% cypermethrin EC or 2.5% kungfu EC 2500 times liquid or cypermethrin 1350-2250 times liquid or dimethoate (smellonic cypermethrin) 1500-2500 times liquid spray or high-efficiency chlorfenapyr 1500-2000 times liquid or No. 1 Gong 2500-3000 times liquid are sprayed, spray once every 7-10 days, and repeat 3-4 times. The prevention and control measures for aphids include: ① Reduce the summer hosts and avoid planting crops such as tobacco and cabbage around the plantation.② Protect the natural enemies of aphids, such as seven-spotted ladybugs, large lacewings, aphid flies, parasitic wasps, and lacewings. ③ Scrape off the rough bark on the trunk, select 80% dichlorvos emulsion, dip the medicine with a brush, and apply it into a medicine ring about 6 cm wide. Cover it with plastic film to prevent wind and rain. The liquid medicine is transported to the branches and leaves with the tree's conductive tissue, and aphids will be poisoned and die when they suck the tree sap. ④ Spray 5% diesel emulsion before budding to kill overwintering eggs. ⑤ At the end of overwintering hatching, use 6000 times of 10% imidacloprid wettable powder or 1500-2000 times of 70% aphidicide wettable powder or 1000-1500 times of 80% dichlorvos emulsion or insecticide (chlorcyanide. dichlorvos) or 1250 times of annihilation wettable powder for prevention and control. The prevention and control measures for the small borer include: ① Avoid mixed planting of peaches, plums and pears. ② Use sex attractants and sugar-vinegar liquid to place in an insect trap to kill adult insects. You can also use attractants and pesticides to make a trap, about 15 per acre. The insect trap 10 is divided into a medicine shell 11 and a shielding cover 12. Twist the twisting cover 13 at the bottom of the medicine shell 11 to open the medicine shell 11, and the bottle filled with attractants can be placed in the hollow medicine shell 11, with the opening of the bottle facing upward. By fixing the sticky plate (not shown) with the upper mounting track 14 and the lower mounting track 15, the sticky plate can be placed on the outer surface of the medicine shell 11, and the upper mounting track 14 and the lower mounting track 15 can be used to prevent the sticky plate from being stuck. The loading track 14 is connected to the inside of the charging shell 11, and the pesticide in the material bottle evaporates into the air, attracting pests to fly toward the charging shell, and the pests are stuck by the sticky plate to kill the pests, better protect the growth of pearl plum seedlings, and increase the yield of pearl plum; by installing a shielding cover on the top of the charging shell, and a fixing hook is provided on the top surface of the shielding cover, the entire insect attractant device can be hung on the pearl plum seedlings, which can better approach and lure pests, and the shielding cover can well protect the sticky plate to prevent the sticky plate from touching water and causing the sticky effect to disappear. ③ During the peak period of adult occurrence, use 20% cypermethrin emulsifiable concentrate 2500 times diluted or 20% cypermethrin emulsifiable concentrate or 2.5% kungfu emulsifiable concentrate 2500 times diluted or cypermethrin 1350-2250 times diluted or dimethoate (cypermethrin) 1500-2500 times diluted or high-efficiency chlorflucythrinate 1500-2000 times diluted or No. 1 Gong 2500-3000 times diluted spray, spray once every 1-10 days, repeat 3-4 times. The prevention and control measures for fruit flies include: ① Use bagging to protect fruits, collect and dispose of damaged fruits and fallen fruits in time. ② Use insect traps to kill adults, and the insect traps are filled with a trapping liquid or sex attractant prepared with 20% brown sugar + 5% lychee wine (self-immersion) + 5% rice vinegar + 0.1% 90% Wanling wettable powder. ③ Plant guava insect-attracting trees in the plantation, and regularly spray insecticides (trichlorfon or 1000 times dichlorvos) on the fruits of the insect-attracting trees. ④ Plow the orchard in spring and winter, and apply trichlorfon, dichlorvos, cypermethrin, cyhalothrin, and dichlorvos on the soil surface to eliminate overwintering insect pupae. The prevention and control measures for fruit-sucking armyworms include: ① When the fruit is about to mature, use fruit bags made of high-quality newspaper and magazine paper to cover the fruit.②Hang fragrant spear oil paper and naphthalene balls in the orchard. ③Use nearly ripe rotten fruits, pierce the peel with a needle, soak it in 20 times trichlorfon for 10 minutes, and hang it on the fruit trees to attract and kill the fruit-sucking moth. ④Remove weeds around the fruit trees in time. ⑤Use black light and purple light to lure moths and kill them.

[0038] Step 7: Pick the fruits that are 90% ripe from the pearl plum trees. Handle the fruits with care, reduce turning, and try to retain the fruit powder. After picking the fruits, shallowly till the soil throughout the garden and apply 150 kilograms of lime per acre. Repeat steps 3 to 7 every year.

[0039] In step six, the lime-sulfur mixture is prepared by the following method: Method 1: According to the raw material ratio of the lime-sulfur mixture and based on the actual application area, calculate the required weight of quicklime, sulfur powder and water; select appropriate measuring tools to weigh quicklime powder, sulfur powder and water; prepare an iron pot, put water in the pot, add quicklime into the water, make it completely blended into lime milk, remove the slag and heat it; use a small amount of hot water to mix the sulfur powder into a paste, slowly pour it into the boiled lime milk, stir while pouring, keep the liquid rolling, mark the water level after pouring, so that boiling water can be added to replenish the evaporated water, boil for 50-60 minutes, when the liquid turns into soy sauce color, cool the liquid, filter it to form the lime sulfur mixture stock solution, store it in a sealed cylinder or add a little oil, and isolate the surface from the air for use. Method 2: Pour water into an iron pot and boil it, mix the sulfur powder into a paste with a small amount of hot water and pour it into the pot; stir the sulfur milk continuously during heating to prevent it from agglomerating, add quicklime in three to four times, reduce the heating power when adding quicklime, and keep the maximum power and stirring for the rest of the time; continue to boil until the domestic liquid medicine turns soy sauce color after adding quicklime, and stop heating; filter the liquid medicine after cooling, pour it into a container, and obtain lime-sulfur mixture. Compared with method 1, the lime-sulfur mixture stock solution of method 2 has a higher concentration and saves more than half of the raw materials. The lime-sulfur mixture can effectively prevent pearl plum trees from being infected with diseases and insects, and ensure the smooth growth of pearl plum trees.

[0040] Embodiment 1:

[0041] 100 square meters were selected as a test plot in Bala Township, Tian'e County, Guangxi, and pearl plum trees were planted according to the high-yield pearl plum planting method disclosed in the present invention. In step one, the fruit tree tray was in the shape of a steamed bun. In step three, the main branches of the pearl plum trees were pruned with three main branches retained. The first main branch faced north with an angle of 65°, the second main branch faced southwest with an angle of 45°, the third main branch faced southeast with an angle of 45°, and the spacing between the first main branch, the second main branch and the third main branch was 15 cm. In step four, rice beans were interplanted in spring and Chinese cabbage was interplanted in autumn. In step five, fertilization was performed using decomposed manure water plus urea as germination fertilizer, and 0.2% dihydrogen phosphate was used as flowering fertilizer. Potassium + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times sodium cyclamate solution + 500 times erythrocyte solution are sprayed on the leaves once; fruit-enhancing fertilizer is 80-100 kilograms of compound fertilizer per mu, and fruit-picking fertilizer is 0.2% potassium dihydrogen phosphate + 500 times erythrocyte solution for foliar spraying once; post-harvest fertilizer is 1kg of urea per plant, and maleic hydrazide is used as the flower inhibitor in step six, and then targeted treatment is carried out in time according to different diseases and insect pests for management. After the harvest, the weight of single plant fruit is 60-70kg, the average weight of single fruit is 25g, the maximum fruit weight is 38g, and the soluble solids content of the fruit is tested to be 14%.

[0042] Embodiment 2:

[0043] 100 square meters were selected as a test plot in Bala Township, Tian'e County, Guangxi, and pearl plum trees were planted according to the high-yield pearl plum planting method disclosed in the present invention. In step one, the fruit tree tray was in the shape of a bun to plant the pearl plum trees. In step three, the main branches of the pearl plum trees were shaped and pruned with two main branches retained for pruning. The two main branches extended in the east-west direction, the angle between the two main branches was 60 degrees, and the distance between the branches was 10-15 cm. The remaining steps were the same as those in the embodiment. After harvest, the statistical weight of the single plant was 55-65 kg, the average weight of a single fruit was 28 g, the maximum fruit weight was 42 g, and the soluble solid content of the fruit was detected to be 14.3%.

[0044] Comparative Example 1:

[0045] 100 m2 was selected as a test plot in Bala Township, Tian'e County, Guangxi, and pearl plums were planted according to the planting method provided by the background technology. After harvest, the weight of single plant was 30-55 kg, the average weight of single fruit was 20 g, the maximum fruit weight was 28 g, and the soluble solid content of the fruit was tested to be 13.2%.

[0046] Comparative Example 2:

[0047] 100 square meters were selected as the test plot in Bala Township, Tiane County, Guangxi. The difference between Comparative Example 2 and Example 1 and Example 2 was the lack of tree shape management in step 3, and the rest were the same. After harvest, the weight of single fruit was 20-35 kg, the average weight of single fruit was 18 g, the maximum fruit weight was 25 g, and the soluble solid content of the fruit was 13.0%.

[0048] According to the method of the present invention, the pearl plums are planted and managed, and the pearl plums begin to bear fruit in the second year and enter the high-yield period in the fourth year. The fruit data of Example 1, Example 2, Comparative Example 1 and Comparative Example 2 are statistically shown in the following table:

[0049] Fruit yield per plant Average fruit weight Maximum fruit weight Soluble solids content Example 1 60-70kg 23g 38g 14.0％ Example 2 55-65kg 25g 42g 14.3％ Comparative Example 1 30-55kg 20g 28g 13.2％ Comparative Example 2 20-35kg 18g 25g 13.0％

[0050] According to actual measurement, the average annual harvest of the pearl plums of Example 1 and Example 2 is 55kg-70kg per plant, the average single fruit weight of the pearl plum is more than 23g, the soluble solid content is more than 14%, the flesh is light orange-yellow, the flesh is tender, extremely crisp, sweet, and has an excellent flavor. The flesh is hard, separated from the core, and the seeds are small. The edible rate is 96.5%, and it can be stored for 20-25 days at room temperature. The pearl plum tree with two main branches has better local lighting conditions than the pearl plum tree with three main branches, which can improve the photosynthetic efficiency of the leaves, concentrate and increase nutrient accumulation, and is beneficial to improving the fruit quality. Therefore, the fruit weight is larger. Due to the small number of branches with fruiting, the overall fruiting amount of a single plant is slightly less, but the average annual harvest of each plant is also more than 55kg; the average annual harvest of the pearl plums of Comparative Examples 1 and Comparative Examples 2 is only 20kg-55kg per plant, the average single fruit weight is between 18-20g, the size is small, and the yield is unstable.

[0051] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A high-yield planting method for pearl plums, characterized by: The steps include: Step 1: Choose a deep, fertile and well-lit soil as the planting site. After cleaning the planting site, dig out a planting pit. After drying and disinfecting the pit, backfill the planting pit. When backfilling, add topsoil to the bottom of the planting pit, and continue to add new soil to 2 / 3 of the planting pit. Then spread decomposed farmyard manure and phosphate fertilizer, and then add new soil until it exceeds the planting pit, forming a steamed bun or dumpling-shaped fruit tree tray; Step 2: Select 1-2 year old seedlings with a height of 70-120 cm, strong stems, full buds, well-developed root systems, and no pests and diseases as planting seedlings. Before planting, disinfect and treat the roots of the seedlings, then plant them in the fruit tree tray, cover them with soil, and water them to establish roots; Step 3: Tree shape management: After the pearl plum seedlings turn green and survive in the fixed year, the young trees are shaped and pruned. In the summer budding period, the buds below the shaping zone are removed. In winter, two or three main branches are left on the trunk as the main tree shape of the pearl plum tree for pruning. In the summer of the second year, side branches are selected, the outer vigorous branches are controlled, and the long branches are thinned out. In the winter of the second year, the extended branches of the main branches are cut short. In the third year, the pruning steps of the second year are repeated. After 3-4 years, the tree shape can be formed. After that, short pruning, shortening, sprout removal, thinning and branch pulling operations are carried out every summer and winter according to the production situation of the pearl plum tree. In the bud stage, the flower branches of the pearl plum seedlings are thinned out to reduce the number of flower branches. After six to seven years, it will enter the peak fruit-bearing period with a large number of fruits; Step 4: Planting soil management: Sow green manure crops between the rows of pearl plum trees every year, and after harvesting the green manure crops, deep plowing and soil improvement are carried out. The straw of the green manure crops is buried and basal fertilizer is applied. In the first year, side ditches are dug outward along the original planting pit. In the second year, fertilizer ditches of the same depth and width are dug outward along the first expanded ditch on the other two pairs of sides, so as to deepen the pit and expand it year by year to mature the soil; Step 5: Topdressing management: During the growth stage of the pearl plum tree, dig a ditch under the projection range of the tree canopy, apply nitrogen, phosphorus and potassium fertilizers in the ditch and cover with soil, apply bud fertilizer during the budding growth stage, apply flowering fertilizer during the simultaneous growth stage of young fruits and new shoots, apply fruit-strengthening fertilizer after the second physiological fruit drop, apply fruit-harvesting fertilizer before fruit-harvesting, and apply post-harvest fertilizer after fruit-harvesting; Step 6: Pest and disease control management: Spray the prepared lime-sulfur mixture on the pearl plum trees during the bud expansion stage; spray the flower inhibitor 7-10 days before the buds bloom in rainy weather to reduce the impact of weather on flowering, pollination and fertilization. Check the growth of the plants regularly, find pests and diseases, and take targeted measures in time. Use insect traps to control pests on the pearl plum trees, remove the damaged dead fruits in time and eliminate the fallen insect fruits to prevent the spread of pests and diseases. Step 7: Pick the fruits that are 90% ripe from the pearl plum trees. Handle the fruits with care, reduce turning, and try to retain the fruit powder. After picking the fruits, shallowly till the soil throughout the garden and apply 150 kilograms of lime per acre. Repeat steps 3 to 7 every year.

2. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step three, when the pearl plum tree is pruned with three main branches, the first main branch faces north, the angle of the first main branch is 60° to 70°, the second main branch faces southwest, the angle of the main branch is 40° to 50°, the third main branch faces southeast, the angle of the main branch is 40° to 50°, and the distance between the first main branch, the second main branch and the third main branch is 15 cm.

3. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step three, when the pearl plum tree is pruned with two main branches, the two main branches extend in the east-west direction, the angle between the two main branches is 60°, and the distance between the branches is 10-15 cm.

4. The high-yield planting method of pearl plum according to claim 2 or 3, characterized in that: When the extension branches of the main branches are shortened in the winter of the second year of the fixed value, 1 / 2 of the branches are cut off. At the same time, the first side branch is selected 50 cm upward from the base of the main branch, and the second side branch is selected in the opposite direction of the first side branch. 2-3 side branches are cultivated on each main branch.

5. The high-yield planting method of pearl plum according to claim 4, characterized in that: After entering the peak fruit-bearing period, the pearl plum trees are pruned 3-5 times every summer. The first pruning is done during the budding period in early spring to remove buds with incorrect directions or weak buds in the double buds. The second pruning is done after the flowers have faded, combined with flower thinning to remove overly dense branches. The third pruning is done after the core is hardened to shorten the vigorously growing branches. The fourth or fifth pruning is done in early or late autumn to pinch back or thin out the excessively growing side shoots and pinch the long fruit branches.

6. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step 4, the green manure crop includes any one of leguminous plants, dry seedlings, potatoes, and Chinese cabbage.

7. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step five, the bud fertilizer is mainly quick-acting nitrogen fertilizer, which can be fertilized with decomposed manure and urea, or 1.5-2 kilograms of compound fertilizer per plant, or 50 kilograms of decomposed human feces and urine per plant, or 30-60 kilograms of flushing fertilizer per mu, or 0.3% urine + 0.2% potassium dihydrogen phosphate + 0.2% borax or 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times flower fruit solution + 500 times leaf um solution for foliar spraying, and spray twice during the flowering period, each time with an interval of 15 days; the flowering fertilizer is mainly nitrogen and potassium fertilizer, 30-60 kilograms of flushing fertilizer per mu, or 2-3 kilograms of compound fertilizer per plant, or 0.2% potassium dihydrogen phosphate + 1000 times active boron solution + 1000 times golden potassium solution + 750 times Lifengle solution + 750 times sodium cyclamate solution The fruit-enhancing fertilizer is mainly nitrogen, phosphorus and potassium fertilizers, and 80-100 jin of compound fertilizer is applied per mu, or 30-60 jin of flushing fertilizer is applied per mu, or 0.2% potassium dihydrogen phosphate + 1000 times of active boron solution + 1000 times of golden potassium solution + 750 times of Lifengle solution + 750 times of sodium cyclamate solution + 500 times of leaf solution is used for foliar spraying, and spraying is carried out 2-3 times in a row, with an interval of 15 days each time; the fruit-picking fertilizer is mainly phosphorus and potassium fertilizers, and 100-200 jin of human and livestock are applied to each plant, or 50-800 jin of compound fertilizer is applied per mu, or 0.2% potassium dihydrogen phosphate + 500 times of leaf solution is used for foliar spraying once; the post-harvest fertilizer is mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizers, and 1kg of urea or 2kg of ammonium bicarbonate or 2kg of human feces and urine are applied to each plant, and watering is carried out in time.

8. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step six, the lime-sulfur mixture comprises the following raw material components in parts by weight: 2.5 parts of quicklime, 5 parts of sulfur powder, and 20 or 25 parts of water.

9. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step six, the flower inhibitor is sprayed with any one of maleic hydrazide, bud inhibitor, naphthylacetic acid and potassium naphthylacetate.

10. The high-yield planting method of pearl plum according to claim 1, characterized in that: In step six, the insect luring device includes a charge shell and a shielding cover, the charge shell is cylindrical and hollow, a twisting cover is rotatably installed at the bottom end of the charge shell, an upper mounting track and a lower mounting track are arranged on the outer surface of the charge shell, the upper mounting track is connected to the inside of the charge shell, an adhesive plate is clamped between the upper mounting track and the lower mounting track, the shielding cover is fixed to the top end of the charge shell, and a fixing hook is arranged on the top surface of the shielding cover.

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