CN114847072A

CN114847072A - Method for planting Tai 8 jackfruit in coastal sandy land

Info

Publication number: CN114847072A
Application number: CN202210544328.4A
Authority: CN
Inventors: 李春; 梁志
Original assignee: Hainan Yijing Agricultural Development Co ltd
Current assignee: Hainan Yijing Agricultural Development Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-08-05
Anticipated expiration: 2042-05-19
Also published as: CN114847072B

Abstract

The invention discloses a method for planting Tai 8 jackfruit in coastal sandy land, which comprises the following steps: (1) selecting a coastal sandy land as a planting area; (2) digging a planting pit and burying fertilizer as a planting position; (3) setting an irrigation system; (4) selecting seedlings, field planting and shaping circular mounds; (5) managing water and fertilizer, namely applying fertilizer for multiple times in a thin mode, and spraying foliar fertilizer to supplement calcium and magnesium elements at regular intervals; (6) weed and pest control; (7) managing the tree crowns, and culturing umbrella-shaped tree crowns. The planting method can successfully plant the Jacob-8 jackfruit in the harsh environment of coastal sandy land and obtain high yield, and meanwhile, the coastal landscape is increased.

Description

Method for planting Tai 8 jackfruit in coastal sandy land

Technical Field

The invention relates to a method for planting Tai 8 jackfruit in coastal sandy land.

Background

The Thai 8 jackfruit is a variety introduced from Thailand, has good pulp taste, is suitable for growing in an area with annual rainfall of 1800 plus 2500 mm, grows in red soil with loose soil, deep and fertile soil layer and good drainage ideally, starts to grow at 13 ℃, stops growing when the temperature is higher than 37 ℃, has proper soil temperature (5-10 cm soil layer) for root system growth of 20-22 ℃, has proper soil water content of 60-70 percent of the maximum water holding capacity and has proper soil pH value of 5.5-6.5. The coastal line of Hainan province is greatly influenced by sea wind, the soil is high in sand content and barren, the improved coastal sandy land is not suitable for planting the fruit trees of the Thai 8 jackfruit trees, and in addition, the vegetation amount on the coastal sandy land is obviously less than that on the land far away from the coastal line due to the poor living environment of the vegetation on the coastal sandy land, so that the coastal landscape is poor. However, for the fruit quality, the taste of sandy loam is usually obviously better than that of non-sandy loam, so that how to solve the problem that the healthy growth of the Thai 8 jackfruit trees in coastal sandy land is urgently needed to be solved.

Disclosure of Invention

In order to solve the problems that the Jack 8 jackfruit trees are not suitable for healthy growth in coastal sandy land and the coastal landscape is poor, the application provides a method for planting the Jack 8 jackfruit trees in the coastal sandy land.

The method for planting the Jacob's disease 8 jackfruit in the coastal sandy land comprises the following steps:

(1) selecting land: selecting coastal sandy land with the altitude of less than 500 meters and the sand content of 50-80% as a planting area, wherein the water level of the sandy soil is below 2 meters. The distance of the planting area closest to the seashore line may be 1 km.

(2) Digging a planting pit: digging planting pits with the length of 80-100 cm, the width of 80-100 cm and the depth of 80-100 cm in advance, adjusting the pH value of soil in the planting pits to 5.5-6.5 for standby application, uniformly mixing biological organic fertilizer and surface soil except animal excrement into the planting pits to serve as fertilizer layers, enabling the upper surfaces of the fertilizer layers to be 25-30 cm away from the original soil surfaces of the planting pits, and filling bottom soil on the fertilizer layers to fill the planting pits, wherein the biological organic fertilizer filled in each planting pit is 20-30 kg, and after 10-15 days, the soil is relatively stable when the soil is sunk on a disk and serves as a planting position. In soils with pH values above 5.5-6.5, it is difficult to obtain high yields, although jack fruit can also grow. The reason why the bio-organic fertilizer does not contain animal wastes is to avoid the soil from being polluted by heavy metals in the wastes.

(3) Setting an irrigation system: digging a drainage ditch in the planting area, then laying a fertilizer water pipeline, and irrigating water everyday after an irrigation system is laid.

(4) Selecting seedlings and planting: selecting strong seedlings, pouring a grafting fertilizer and a grafting medicine before lifting the seedlings, lifting the seedlings with a nutrition cup, digging a fixed planting hole at a fixed planting position during fixed planting, embedding the nutrition cup into the fixed planting hole, covering soil 3-5 cm higher than the top of the nutrition cup, and arranging mounds so that the top surfaces of the mounds are 10-20 cm higher than the original soil surface and the diameter of the mounds is 1.2-1.5 m.

(5) And (3) water and fertilizer management: watering after planting to ensure that the soil humidity at a position 30-40 cm below the soil surface is 60-70%; the fertilizer application is thin application for a plurality of times, and foliar fertilizer is regularly sprayed to supplement calcium and magnesium elements.

(6) Weed and pest control: the glufosinate-ammonium weeding and artificial weeding are adopted for weed control, and are forbidden to be sprayed to green parts of crowns and trunks; the control of the longicorn adopts the steps of coating lime water on the trunk, killing adults, scraping eggs, stabbing iron wires, removing damaged branches, fumigating and poisoning larvae by deltamethrin emulsifiable solution, and spraying pesticide to kill adults in the peak eclosion period; the control of the large ashbya adopts artificial capture and pesticide disinsection; the anthracnose is prevented and treated by removing branches and leaves with diseases and alternately spraying benzyl pyrazole ester, petai and mancozeb; the method is characterized in that hymexazol and ethylicin are sprayed to prevent and treat root rot; the soft rot prevention and treatment adopts a branch pruning sterilization garden, bagging and fruit covering, and spraying azoxystrobin suspending agent liquid, or benzyl pyrazole ester liquid, or copper hydroxide wettable powder liquid at the early stage of flowering, young fruit stage and before bagging; the control of fruit rot adopts spraying azoxystrobin suspending agent liquid, or benzyl pyrazole ester liquid, or copper hydroxide wettable powder liquid in the fruit ripening period; for preventing and treating red rot, excision of disease part, coating with mixture of asphalt and diesel oil, and spraying Bordeaux mixture are used.

The tree trunk coating lime water can prevent and treat longicorn, has an antifreezing effect, is white after being dried, is not easy to absorb heat in the daytime, can reduce the temperature difference between day and night, and prevents frostbite caused by large temperature difference between day and night.

(7) Managing the tree crown: culturing an umbrella-shaped crown, wherein the height of an adult crown is controlled to be 3-3.5 m; carrying out trimming and shaping technical operation: slightly trimming young trees from bottom to top, wherein the volume of the trimmed branches is less than 25% of the total volume of the crowns each time; when topping and pruning are carried out, when the growth height of the main rod reaches 1.4-1.5 meters, pinching is carried out at a distance of 1.2-1.3 meters from the ground according to the distribution condition of branches, 3-5 robust branches which are uniformly distributed and grow at an angle of 45-60 degrees with the trunk are selected and reserved according to four directions of east, west, south and north, primary branches are cultured, the distance between the selected branches and the ground is 0.8-1.2 meters, and other redundant branches are reserved according to the condition; when the primary branches grow to 1.4-1.5 meters, pinching and topping off at the position 1.2-1.3 meters away from the main rod, reserving 3-4 branches which are uniformly distributed, strong and grow obliquely upwards to culture the secondary branches, and wiping off all other branches; and (3) removing the top by pinching for 2-3 times to form the umbrella-shaped crown.

In the step (1), the planting area is 3-3.5 kilometers away from the coastline.

In the step (2), when the pH value of the soil in the planting pit is below 5.5, 1 kg of quicklime or limestone is applied to each cubic meter of planting hole; when the pH of the soil is above 7, 1 kg of sulfur is applied to each cubic meter of hole planting soil.

In the step (4), the irrigation and grafting fertilizer comprises root irrigation fertilizer and foliar spray, the root irrigation fertilizer is carried out 2-3 days before seedling transplantation, the foliar spray is carried out 1-2 days before seedling transplantation, and the grafting medicine is beaten 1-2 days before seedling transplantation; the top surface of the mound is a plane.

In the step (5), the fertilizer is applied by irrigating the fertilizer once every 8-10 days or irrigating the fertilizer for 1-2 times per batch of buds, and the water for fertilizing each time is 9-10 kg per plant of the newly planted seedlings; the foliar fertilizer is sprayed with calcium magnesium lactate solution every 45-60 days.

In the step (7), pruning is carried out on sunny days when the young plants are young; the trimming procedure is as follows: firstly trimming competitive branches, secondly trimming dense branches, crossed branches, dead branches and insect-disease branches, and directly trimming from the base parts of the branches; and then pruning the strong branches with the diameter larger than that of the trunk 1/3, when the proportion of the strong branches in the crown is too large, pruning branches growing downwards at the top end parts of the strong branches, and reserving a part of small branch leaves for assisting photosynthesis, wherein when the strong branches have several branches, only one strong branch can be pruned at a time.

Arranging a windproof belt around the planting area; the wind-proof belt is a wind-proof forest.

Has the advantages that: the method improves the coastal sandy land, so that the method is suitable for planting the Jacob's acid 8 jackfruit, realizes high yield, can improve fruit taste due to the planting in the sandy land, and increases coastal landscape as a landscape forest.

Drawings

FIG. 1 is an ecological environment diagram of a planting area of Thai 8 jackfruit of the present invention;

FIG. 2 is a diagram showing the growth of Jack fruit 8 after being planted for 7 months;

FIG. 3 is a diagram showing the growth of Jack fruit 8 after 17 months of planting;

FIG. 4 is a fruit production diagram of Tai 8 jackfruit;

FIG. 5 is a diagram of Tai 8 pineapple honey as a coastal landscape forest.

Detailed Description

The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.

Examples

The invention relates to a method for planting Tai 8 jackfruit in coastal sandy land, which is actually planted in the tail town of autonomous county of Changjiang Li nationality in Hainan province.

(1) Land selection

Selecting coastal sandy land with the altitude of less than 500 meters and the sand content of 50-80% as a planting area, wherein the nearest distance of the planting area to a coastline is about 3 kilometers, the sand content of sandy soil is 70-80%, the water level of the sandy soil is below 2 meters, arranging a windproof belt around the planting area, and the windproof belt is a windproof forest. The ecological environment of the planting area for planting the Jacob's disease 8 jackfruit is shown in figure 1.

(2) Digging planting pit

Digging planting pits with the length of 80 cm, the width of 80 cm and the depth of 80 cm in advance, wherein the dug bottom soil is used for standby, the planting pits are distributed according to the line spacing of 4.0-5.5 m multiplied by 5.0-6.0 m, the pH value of the soil in the planting pits is 6, the biological organic fertilizer except animal excrement and surface soil are uniformly mixed and filled into the planting pits to serve as fertilizer soil layers, the distance between the upper surface of each fertilizer layer and the original soil surface of the planting pit is 25-30 cm, the bottom soil is filled on the fertilizer layers to fill the planting pits, the biological organic fertilizer filled into each planting pit is 20-30 kg, and after 10-15 days, the soil is relatively stable when the soil is sunk on a disk and serves as a planting site.

The pH of the soil in the planting pits can be adjusted, and when the pH of the soil is below 5.5, 1 kg of quicklime or limestone is applied to each cubic meter of planting pits; when the pH value of the soil is above 7, 1 kg of sulfur is applied to each cubic meter of hole planting soil. The pH of the soil in this example was 6, so no conditioning treatment was necessary.

(3) Setting irrigation systems

Digging a drainage ditch in the planting area, then laying a fertilizer water pipeline, and irrigating water everyday after an irrigation system is laid.

(4) Selecting and planting

Selecting robust seedlings, pouring and delivering fertilizer and grafting medicine before seedling raising, raising seedlings with a nutrition cup, digging a planting hole of about 15 cm at a planting position during planting, taking off a black film on the seedlings in the nutrition cup, loosening the nutrition soil at the lower part 1/3 of the nutrition cup by hands to enable a root system to expand outwards, preventing packing and increasing the air permeability and water permeability of the nutrition cup, aligning a bud joint strip to a main wind direction (south-east direction in the embodiment), straightening, embedding the nutrition cup in the planting hole, covering soil 3-5 cm higher than the top of the nutrition cup (covering soil must be below 5 cm of a bud joint), arranging a whole circular soil pier with the diameter of 1.2-1.5 m and the top of the soil pier being a plane, and enabling the top of the soil pier to be 10-20 cm higher than the original soil surface.

When the soil mound is arranged, the top surface of the soil mound is cut into an inclined plane or a deep pit along the slope direction, so that the water and fertilizer can not flow out of the soil mound and can uniformly permeate downwards, the water and fertilizer at the base part of the sapling can be uniform and sufficient and can not be deposited, and the water and fertilizer can be dispersed around the rhizosphere to be beneficial to the growth of the root system and extend to the periphery. If the top surface of the mound is integrated into an inclined surface, the root system is easy to grow unevenly and even distributed on one side (the root system on the inclined lower surface is developed, the root system on the inclined higher surface is less), and the wind resistance is poor.

The method comprises the steps of irrigating the roots 2-3 days before seedling transplantation, mainly supplementing root nutrition, promoting root growth and preventing root rot and neck base rot, spraying the leaves 1-2 days before seedling transplantation, mainly preventing and treating leaf surface diseases and insect pests, supplementing leaf surface nutrition and medium and trace elements, and pumping the grafting medicine 1-2 days before seedling transplantation. The root fertilization can be selected from any one of the schemes shown in the table 1, and the foliar spray can be selected from any one of the schemes shown in the table 2.

TABLE 1

TABLE 2

Note: when the compound sodium nitrophenolate is sprayed to the leaf surface, 3000 times of the compound sodium nitrophenolate with the concentration of 1.8 percent is used at the temperature of 15-30 ℃, and 4000 times of the compound sodium nitrophenolate is used at the temperature above 30 ℃; the 0.01% brassinolide is used at 20-30 deg.C 1500 times.

(5) Liquid manure management

Watering after planting to ensure that the humidity of the soil at a position 30-40 cm below the soil surface is 60-70%, and starting to fertilize when new seedlings grow new buds. The planting area is mainly sand, N, P, K, organic matters and the like are deficient, the water and fertilizer retention capacity is poor, the fertilizer irrigation principle is mainly thin and applied for multiple times, for example, fertilizer is irrigated once every 10 days or fertilizer is irrigated for 1-2 times per batch of buds, the fertilizer water is irrigated for 10 kilograms per plant of a new fixed-planting seedling every time, and the fertilizer water consumption is gradually increased along with the growth of the seedling in the later period. Because sand lacks calcium and magnesium, and the root fertilizer has low utilization rate, which can not meet the requirement of crown growth, and the Tai 8 jackfruit prefers calcium and magnesium, the foliar fertilizer is sprayed regularly to supplement calcium and magnesium elements, for example, calcium lactate and magnesium lactate liquid is sprayed every 45-60 days, the foliar spray fertilizer has high utilization rate, which can supplement nutrients required by seedling growth, also can prevent the nutrient deficiency of the seedling, promote the growth of new bud and new leaf of the seedling, and improve the growth vigor of the seedling. In addition, trace elements are supplemented as the case may be. After planting, the first fertilization of the roots can be selected from any one of the schemes shown in the table 3, the common fertilization of the roots of the young trees in the vegetative growth period can be selected from any one of the schemes shown in the table 4, and the calcium and magnesium supplementing fertilization of the roots of the young trees can be selected from any one of the schemes shown in the table 5.

TABLE 3

TABLE 4

TABLE 5

The foliar fertilizer also needs to be sprayed simultaneously with disease prevention and deinsectization, so that the nutrition is supplemented, and the new buds and new leaves are prevented from being damaged by diseases and insects, and any one of the schemes shown in the table 6 can be specifically selected.

TABLE 6

Note: after continuous rainy days or heavy rains, the bactericide can be singly sprayed for 1 to 2 times by adding 10 g of 46 percent copper hydroxide water dispersible granules and 30 jin of water, and has better control effect on both fungi and bacterial diseases.

(6) Weed and pest control

The weed control adopts glufosinate-ammonium for weeding and artificial weeding, and is forbidden to be sprayed to green parts of crowns and trunks. The control of the longicorn adopts the steps of coating lime water on the trunk, killing adults, scraping ova, stabbing iron wires, removing damaged branches, fumigating and killing larvae by 400 times of deltamethrin emulsifiable solution with 2.5 percent, and spraying pesticide to kill adults in the peak eclosion period. The prevention and treatment of the large-scale peyronie beetle adopts artificial capture and pesticide disinsection. The anthracnose is controlled by removing branches and leaves with diseases, and alternately spraying 50% of benzyl pyrazole ester, 60% of petasites and 70% of mancozeb. The root rot is prevented and treated by spraying hymexazol and ethylicin. The soft rot prevention and treatment adopts a pruning branch cleaning and sterilization garden, bagging and fruit covering, and spraying 32.5 percent azoxystrobin suspending agent 1000-fold 1500-fold liquid or 32 percent benzyl pyrazole ester 1000-fold 1500-fold liquid or 77 percent copper hydroxide wettable powder 500-fold 800-fold liquid at the early stage of flowering, the young fruit stage and before bagging. The method for preventing and treating the fruit rot adopts the method that 1500-fold liquid of 32.5 percent azoxystrobin suspending agent 1000-. For preventing and treating red rot, excision of disease part, coating with mixture of asphalt and diesel oil, and spraying with 1% Bordeaux mixture are used. The prevention and treatment of fruit cracking disease adopts the additional application of calcium fertilizer and the enhancement of water and fertilizer management.

Because the planting area is a sandy land and a sloping land is more, the safety of the sapling is ensured and the water and soil loss is prevented while weeding, the weeding agent can only use glufosinate-ammonium but not glyphosate, and because the glufosinate-ammonium can kill weeds with less residue, the root system structure of the weeds in the soil is not damaged, and the water and soil loss can be prevented. Weeding comprises weeding before planting and weeding after planting, wherein weeding before planting is to spray 20 percent glufosinate-ammonium 200 ml/30 jin water and organic silicon in advance, and deeply plowing and harrowing are carried out after 5-7 days, so that the weed base can be obviously reduced and weed germination can be delayed. After planting, weeding is carried out when weeds grow to be about 10 cm high, and in windless days in sunny days, spraying is carried out between lines by adding 200 ml of 20% glufosinate ammonium and organic silicon into every 30 jin of water so as to avoid spraying to the leaves and green parts of the seedlings (the seedlings are preferably sheathed by plastic bags). The base of the seedling is artificially weeded as much as possible, so that the weeding is realized, and the soil is loosened and the root is promoted; the basal part of the big seedling avoids using tools such as a hoe to hoe up the grass, so as to avoid cutting off the soil surface root system below the crown.

(7) Crown management: culturing an umbrella-shaped crown, wherein the height of an adult crown is controlled to be 3-3.5 m; carrying out trimming and shaping technical operation: slightly trimming young trees from bottom to top, wherein the volume of the trimmed branches is less than 25% of the total volume of the crowns each time; when topping and pruning are carried out, when the growth height of the main rod reaches 1.4-1.5 meters, pinching is carried out at a distance of 1.2-1.3 meters from the ground according to the distribution condition of branches, 3-5 robust branches which are uniformly distributed and grow at an angle of 45-60 degrees with the trunk are selected and reserved according to four directions of east, west, south and north, primary branches are cultured, the distance between the selected branches and the ground is 0.8-1.2 meters, and other redundant branches are reserved according to the condition; when the primary branches grow to 1.4-1.5 meters, pinching and topping off at the position 1.2-1.3 meters away from the main rod, reserving 3-4 branches which are uniformly distributed, strong and grow obliquely upwards to culture the secondary branches, and wiping off all other branches; and (3) removing the top by pinching for 2-3 times to form the umbrella-shaped crown.

Pruning in sunny days when young; the trimming procedure is as follows: firstly trimming competitive branches, trimming dense branches, crossed branches, dead branches and insect-disease branches, and directly trimming from the base parts of the branches; and then pruning the strong branches with the diameter larger than that of the trunk 1/3, when the proportion of the strong branches in the crown is too large, pruning branches growing downwards at the top end parts of the strong branches, and reserving a part of small branch leaves for assisting photosynthesis, wherein when the strong branches have several branches, only one strong branch can be pruned at a time.

The growth status of the Thai 8 jackfruit after being planted for 7 months is shown in figure 2, wherein the planting field is sand. The growth condition of the planted Thai 8 jackfruit after 17 months is shown in figure 3, which shows that the Thai 8 jackfruit seedlings grow healthily. The fruit yield of the Tai 8 jackfruit is shown in figure 4, which shows that the fruit is healthy, full and high in yield. The patches of cloisonne (8) pineapple honey formed the coastal landscape forest as shown in figure 5.

The above-mentioned techniques not specifically mentioned refer to the prior art.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for planting Thai fruit 8 in coastal sandy land is characterized by comprising the following steps:

(1) selecting land: selecting coastal sandy land with the altitude of less than 500 meters and the sand content of 50-80% as a planting area, wherein the water level of the sandy soil is less than 2 meters;

(2) digging a planting pit: digging planting pits with the length of 80-100 cm, the width of 80-100 cm and the depth of 80-100 cm in advance, adjusting the pH value of soil in the planting pits to 5.5-6.5 for standby application, uniformly mixing biological organic fertilizer and surface soil except animal excrement with the planting pits distributed according to the line spacing of 4.0-5.5 m multiplied by 5.0-6.0 m, filling the biological organic fertilizer and the surface soil into the planting pits as fertilizer layers, wherein the distance between the upper surface of the fertilizer layers and the original soil surface of the planting pits is 25-30 cm, filling the base soil on the fertilizer layers until the planting pits are filled, the biological organic fertilizer filled in each planting pit is 20-30 kg, and after 10-15 days, the soil is relatively stably sunk in a disk and is used as a planting position;

(3) setting an irrigation system: digging a drainage ditch in a planting area, then laying a fertilizer and water pipeline, and irrigating water every day after an irrigation system is laid;

(4) selecting seedlings and planting: selecting robust seedlings, pouring a grafting fertilizer and a grafting medicine before lifting the seedlings, lifting the seedlings with a nutrition cup, digging a fixed planting hole at a fixed planting position during fixed planting, embedding the nutrition cup into the fixed planting hole, covering soil 3-5 cm higher than the top of the nutrition cup, and arranging mounds so that the top surfaces of the mounds are 10-20 cm higher than the original soil surface and the diameter of the mounds is 1.2-1.5 m;

(5) and (3) water and fertilizer management: watering after planting to ensure that the soil humidity at a position 30-40 cm below the soil surface is 60-70%; the fertilization is thin fertilization for multiple times, and foliar fertilizer is regularly sprayed to supplement calcium and magnesium elements;

(6) weed and pest control: the glufosinate-ammonium weeding and artificial weeding are adopted for weed control, and are forbidden to be sprayed to green parts of crowns and trunks; the control of the longicorn adopts the steps of coating lime water on the trunk, killing adults, scraping eggs, stabbing iron wires, removing damaged branches, fumigating and poisoning larvae by deltamethrin emulsifiable solution, and spraying pesticide to kill adults in the peak eclosion period; the control of the large ashbya adopts artificial capture and pesticide disinsection; the anthracnose is prevented and treated by removing branches and leaves with diseases and alternately spraying benzyl pyrazole ester, petai and mancozeb; the method is characterized in that hymexazol and ethylicin are sprayed to prevent and treat root rot; the soft rot prevention and treatment adopts a branch pruning sterilization garden, bagging and fruit covering, and spraying azoxystrobin suspending agent liquid, or benzyl pyrazole ester liquid, or copper hydroxide wettable powder liquid at the early stage of flowering, young fruit stage and before bagging; the control of fruit rot adopts spraying azoxystrobin suspending agent liquid, or benzyl pyrazole ester liquid, or copper hydroxide wettable powder liquid in the fruit ripening period; for preventing and treating red rot, excision of disease part, coating of asphalt and diesel oil mixture, and Bordeaux mixture spraying are adopted;

2. The method for planting Jack 8 jackfruit in coastal sandy land as claimed in claim 1, wherein in step (1), the planting area is 3-3.5 km from the coastline.

3. The method for planting Thai 8 jackfruit in coastal sandy land as claimed in claim 1, wherein in step (2), the soil pH in the planting pit is adjusted by applying 1 kg of quicklime or limestone per cubic meter of planting hole when the soil pH is below 5.5; when the pH of the soil is above 7, 1 kg of sulfur is applied to each cubic meter of hole planting soil.

4. The method for planting Thai 8 jackfruit in coastal sandy land as claimed in claim 1, wherein in step (4), the applying of the grafting fertilizer comprises applying root fertilizer and foliar spray, wherein the root fertilizer application is performed 2-3 days before the seedling transplantation, the foliar spray is performed 1-2 days before the seedling transplantation, and the grafting medicine is applied 1-2 days before the seedling transplantation; the top surface of the mound is a plane.

5. The method for planting Thai 8 jackfruit in coastal sandy land as claimed in claim 1, wherein in step (5), the fertilizer is applied by irrigating the fertilizer once every 8-10 days or irrigating the fertilizer 1-2 times per batch of buds, and the fertilizer water is 9-10 kg per plant for new seedling; the foliar fertilizer is sprayed with calcium magnesium lactate solution every 45-60 days.

6. The method for planting Jack 8 jackfruit in coastal sandy land as claimed in claim 1, wherein in step (7), pruning is carried out on a sunny day at the young age; the trimming procedure is as follows: firstly trimming competitive branches, trimming dense branches, crossed branches, dead branches and insect-disease branches, and directly trimming from the base parts of the branches; and then pruning the strong branches with the diameter larger than that of the trunk 1/3, when the proportion of the strong branches in the crown is too large, pruning branches growing downwards at the top end parts of the strong branches, and reserving a part of small branch leaves for assisting photosynthesis, wherein when the strong branches have several branches, only one strong branch can be pruned at a time.

7. The method for planting Jacob 8 jackfruit in coastal sandy land as claimed in claim 1 wherein a windbreak strip is placed around the planting area.

8. The method for planting Thai 8 jackfruit in coastal sandy land according to claim 7, wherein the windbreaker strip is windbreaker forest.