CN111386879B

CN111386879B - In-tree culture method of dragon fruit fattening stock

Info

Publication number: CN111386879B
Application number: CN202010370656.8A
Authority: CN
Inventors: 戚文洪; 梁彩虹; 罗有海
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2022-05-27
Anticipated expiration: 2040-05-06
Also published as: CN111386879A

Abstract

The invention provides an in-tree culture method of a pitaya fattening anvil, which comprises five links of selecting a new shoot, cutting off a thorn seat, topping with a fixed length, leaving a tree for fattening and harvesting the fattening anvil, and has the characteristics of simple, efficient and convenient operation, high survival rate, good quality of the produced finished product fattening anvil and the like. The pitaya fattening stock culture method disclosed by the invention utilizes the nutrition supply and wound self-healing capacity of a plant matrix, and the full process of cultivation such as castration, healing, fattening and the like of the pitaya stock is completed on a plant tree body in a non-isolated mode to produce the fattening stock, so that the problems of high wound infection rate, long fattening time and the like in the implementation process of a common isolated rooting and fattening method can be effectively solved.

Description

In-tree culture method of dragon fruit fattening stock

Technical Field

The invention relates to the technical field of agricultural planting, in particular to an on-tree culture method of a dragon fruit fattening stock.

Background

Dragon fruits are emerging tropical fruit trees in south asia. The propagation mode of the dragon fruit is divided into a sexual propagation method and an asexual propagation method, because the germination rate of the sexual propagation seed is low, the propagation speed is slow, the genetic basis is complex, and the variety characteristics are not easy to maintain, the method is rarely adopted, the asexual propagation method is mainly adopted for producing the dragon fruit, and the cutting method and the grafting method are the most commonly used.

The grafting method is to graft the stem segment or bud of another dragon fruit onto the stem segment or plant of another dragon fruit (also called stock) to make the two parts grow into a complete dragon fruit plant. The stem segment grafted is called rootstock. The stock is grafted to become the root part of the plant.

Generally, the cultivation of the dragon fruit stock adopts a cutting seedling method, and the cultivation of the stock is carried out in an in vitro mode, namely, a branch section is cut or cut off from a plant, and the stock is used as the stock to be grafted after the survival and the survival of the cutting root are restored to a certain degree. The rootstocks are only subjected to cuttage rooting and recovery culture treatment and are not subjected to castration, fattening and other treatment, and the quality and the state of the rootstocks before grafting are mostly determined by the selection of the rootstock branch segments before cuttage and the rooting recovery degree after cuttage. The cultivation mode of the rootstock often has the following problems:

(1) after the stem segment of the stock is cut away from the stock plant, the situation that the branch is easy to be infected and rotten due to wound infection in the cutting process is caused by the fact that a large cut exists and the stabbing seats on the branch are stabbed mutually in the transportation process.

(2) After the rootstock stem is cut from the stock plant, the supply of nutrition, moisture and mineral substances is interrupted, and the rootstock stem can take a long time to root and recover to the original state.

(3) Because the rootstocks are not castrated and pricked and fattened, the fleshy edges of the rootstocks before grafting are low in filling degree and thin in fleshy quality, grafting operation is inconvenient to carry out, and scions after grafting are healed to be slow, so that the subsequent growth of scion new buds is not facilitated.

Disclosure of Invention

The invention aims to solve the problems and provide an in-tree culture method of a pitaya fattening stock, the in-tree culture method is free of separation, wounds generated by cutting and topping are not easy to infect and rot, healing is fast, the fleshy edges of the obtained stock are thick, rich and full in nutrition and small in wound, healing and recovery are fast, and survival rate is high.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an in-tree culturing method for a dragon fruit fattening anvil comprises five links of young sprout selection, thorn seat removal, fixed-length topping, tree remaining fattening and fattening anvil fattening harvesting.

S1, young shoot selection

And selecting the normal growth young shoots which are positioned at the top of the plants and face upwards as the female branches of the fattening stocks.

S2. the thorn seat is removed

S21, first thorn cutting: and (4) performing primary thorn cutting when the length of the mother branch of the fattening stock reaches 25-35 cm.

S22, secondary deburring: and when the length of the parent branch of the fattening stock is 10-15 cm larger than the preset length of the fattening stock, performing secondary cutting and piercing.

The 'fattening stock reserved set length' refers to the length set according to production, planting, packaging and transportation or the needs of customers. For example, for long-distance transportation, the foam box is required to be placed according to the length of the box, and the length of the foam box is generally set to be 45 cm; if the glass is placed according to the width, 35cm is set. If transported at close distances, customers generally prefer lengths of 60 centimeters or more.

S3, fixed-length topping

S31, topping: and after the second cutting of the thorns is finished, performing flat cutting and topping immediately at the position 2-3cm higher than the preset length of the fattening stock, wherein the cut is vertical to the xylem.

Attention is paid to avoid bruising or breaking the terminal bud; the depth of the cutting is suitable for completely cutting off the thorn seat and the hidden bud below the thorn seat; the cutting of the thorns is preferably performed in sunny weather, so that continuous rainy weather is avoided as much as possible.

S32, repairing and cutting thorns: after topping, completely removing all residual stabs on the mother branches of the fattening stocks.

S4, leaving trees to fatten

After fixed-length topping is finished, the fattening stock mother branches are left for 2-4 months, and the fattening stock mother branches are developed to be in a full and fat state (fattening for short), so that fattening stocks are obtained.

The fattening stock is the grafting stock after fattening culture, and refers to the grafting stock after cutting off all the thorn seats on the edges of the branches of the pitaya stock and culturing the branches into a fat, full and nutrient-full state by a certain method.

S4, fattening stock harvesting

And (3) cutting the fattened female stocks (fattened stocks) at the 2-3cm positions of the bases to obtain finished fattened stocks, and directly using the fattened female stocks as stock grafting. After grafting, placing the grafted nursery stock in an environment suitable for rooting and healing the scion to be cultured until the standard of the nursery stock is reached.

Preferably, in step S1, when young shoots germinate and sprout for 3-10 cm in spring or autumn, young shoots are selected.

Preferably, in the step S1, selecting normal growing shoots which are located at the top of the plant and face upwards as fattening stock mother branches, wherein the number of the normal growing shoots accounts for 60% -80% of the total number of the shoots; selecting the young shoots which are positioned at the top of the plant and grow normally and obliquely outwards as vegetative branches to allow the young shoots to grow naturally, wherein the number of the young shoots accounts for 20% -40% of the total number of the remained shoots, and cutting off the young shoots which are extracted from the middle lower parts of the branches, the trunk and other redundant young shoots.

Preferably, in step S1, selecting normal growing shoots located at the top of the plant and facing upwards as fattening stock shoots, the number of the normal growing shoots accounting for 75% of the total number of the shoots; and selecting the young shoots which are positioned at the top of the plant and normally grow outwards in an inclined way as vegetative branches for natural growth, wherein the number of the young shoots accounts for 25 percent of the total number of the remained shoots.

Preferably, in step S2, the specific puncturing step is: and (3) completely removing the edges of the young shoots and the thorn seats from top to bottom at a position 8-12 cm away from the terminal buds, wherein the depth of the thorn cutting is the depth capable of completely removing the thorn seats and the hidden buds below the thorn seats.

Preferably, in step S1, after selecting the reserved young shoots, spraying an insecticidal and bactericidal agent once every 10 to 15 days to protect the young shoots, and continuously spraying for 2 to 3 times.

Preferably, the insecticidal and bactericidal agent is a mixed solution of 80% mancozeb wettable powder 600-800 times liquid, 75% chlorothalonil wettable powder 800-1000 times liquid, 70% thiophanate-methyl wettable powder 600-800 times liquid, and 90% trichlorfon emulsifiable 1000 times liquid, 5% abamectin emulsifiable 800 times liquid or 20% acetamiprid water dispersible granule 1000 times liquid.

Preferably, in the step S1, the organic multi-element foliar fertilizer is sprayed once every 5 to 10 days in the fattening process.

Preferably, the organic multi-element foliar fertilizer comprises the following components in percentage by mass and volume: 0.2-0.5% of urea, 0.1-0.3% of ammonium sulfate, 0.01-0.1% of calcium superphosphate, 0.3-0.6% of diammonium phosphate, 0.2-0.4% of monopotassium phosphate, 0.6-0.7% of potassium sulfate, 0.4-0.6% of magnesium sulfate, 0.0010-0.0020% of manganese sulfate, 0.0010-0.0015% of zinc sulfate, 0.001-0.003% of boric acid, 0.0001-0.0003% of copper sulfate, 0.0001-0.0003% of ferrous sulfate heptahydrate, 0.0001-0.0003% of sodium molybdate, 0.02-0.04% of citric acid, 0.5-1.0% of EDTA disodium salt, 0.01-0.05% of sorbitan betaine and the balance of water.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. according to the method for culturing the dragon fruit fattening stock on the tree, the whole process of culturing operation is carried out on the tree (not in vitro), and the tree does not need to be trimmed from a tree body plant firstly, and then fattened after the root is promoted in a nursery like the traditional fattening method; because the wound is not separated from the body, the wound generated by the cutting and topping is not easy to be infected and rotted, and the wound is quickly healed; and the stocks obtained by fattening the trees are full of nutrients and full and thick, the grafting operation can be greatly facilitated compared with the stocks which are not fattened, the scions after grafting can easily obtain sufficient nutrient supply, the healing recovery is fast, and the survival rate is high.

2. According to the method for culturing the pitaya fattening stock in the tree, the stem section is in a tender state during castration, nutrient components required for growth come from a mother tree, the pitaya fattening stock can heal automatically without airing wounds and soaking disinfectant, the method is simple and convenient, is not easy to infect, is high in wound healing degree, the wound generated by cutting off the thorn seat of the cultured finished product fattening stock is completely healed, only one small wound and the whole stock have no thorn seat after the finished product fattening stock is cut, the condition that branches are stabbed mutually in the transportation and grafting seedling raising processes to cause infection and rot is not easy to occur, and the pitaya fattening stock can be grafted without carrying roots, and the survival rate is high.

3. The leaf fertilizer provided by the method for culturing the dragon fruit fattening stock in the tree provided by the invention provides nutrition for the growth and metabolism of the dragon fruit stem, meets the growth and development requirements of the dragon fruit stem, and provides N, P, K as a major element, Zn, Mg, Fe, Mn, Mo, B, citric acid as a trace element and sorbamide betaine as a growth regulation promoter. In addition, Zn, Mg, Fe, Mn, Mo and B form chelate with EDTA and citric acid, so that the absorption of plants is facilitated, and the stout of roots is promoted, so that the effect of fattening the rootstock on trees is achieved. After the new tips are selected, an insecticidal sterilizing agent is sprayed, wherein the insecticidal sterilizing agent comprises an insecticide and a sterilizing agent, so that germs and insect eggs can be fully eliminated, the new tips are prevented from being damaged, the later fattening is influenced, and the quality of the finished fattening stock is guaranteed.

Drawings

FIG. 1 is a drawing showing "seat removing (A)", "fixed length topping (B)" and a map (right) "in example 1 of the present invention;

FIG. 2 is a "leave trees and fatten (C)" and a comparison graph (right) for fattening trees according to example 1 of the present invention;

fig. 3 shows a fattening anvil (left) and a comparison map (right) according to example 1 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

An on-tree culture method of dragon fruit fattening stock comprises the following steps:

s1, 'young sprout selection': and selecting young shoots when the young shoots germinate and are extracted for 3-10 cm. Selecting normal growing young shoots which are positioned at the top of the plant and face upwards as fattening stock mother branches (marked at the base of the branches by red marker pens), wherein the number of the normal growing young shoots is 60; selecting young shoots which are positioned at the top of the plant and grow normally and obliquely outwards as nutrient branches (marked at the base parts of the branches by black marker pens) for allowing the young shoots to grow naturally, wherein the number of the young shoots is 20; and cutting off all the shoots extracted from the middle and lower parts of the branches, the trunk and other redundant young shoots.

And after selecting reserved young shoots, spraying an insecticidal and bactericidal agent once every 10-15 days to protect the young shoots, and continuously spraying for 3 times. The insecticidal sterilizing agent is a mixed solution of 800 times of 80% mancozeb wettable powder and 1000 times of 90% trichlorfon emulsifiable concentrate.

S2, removing the thorn seat:

cutting thorns for the first time: when the length of the mother branch of the fattening stock reaches 25-35 cm, performing primary thorn cutting, and respectively cutting off the edges of the young shoots and the thorn seats from top to bottom at a position 10cm away from the terminal buds by using a sharp sugarcane peeling knife (or a similar knife), so as to avoid bruising or breaking the terminal buds; the depth of the cutting is just enough to completely remove the pricking seat and the hidden bud below the pricking seat.

And (3) secondary deburring: and (4) performing secondary thorn cutting when the length of the mother branch of the fattening stock is 10-15 cm greater than the preset length of the stock, wherein the preset length is 50cm, and the method is the same as the first thorn cutting. See fig. 1 for a specific illustration and comparison.

S3, fixed-length topping: after the second cutting step is finished, performing flat cutting and topping immediately at a position 2-3cm higher than the preset length of the fattening stock, wherein the cut is vertical to the xylem; after topping, completely removing the residual thorn bases on the stock mother branches. See fig. 1 for a detailed illustration and comparison.

S4, leaving trees to fatten: after fixed-length topping is finished, the stock mother branches are left to grow for 3 months, and at the moment, the stock mother branches are developed to be in a full and fat state (fattening for short), so that fattening stocks are obtained. See figure 2 for a specific illustration and comparison.

S5, fattening stock harvesting: and (3) cutting off the rootstock by using a sharp branch shear at the base part of the 'fattening rootstock' of 2-3cm to obtain a 'finished product fattening rootstock', and directly using the finished product fattening rootstock as the rootstock for grafting. See figure 3 for a specific illustration and comparison.

Example 2

s1, 'young sprout selection': and selecting young shoots when the young shoots germinate and grow for 3-10 cm. Selecting normal growing young shoots which are positioned at the top of the plant and face upwards as fattening stock mother branches (marked at the base of the branches by red marker pens), wherein the number of the normal growing young shoots is 60; selecting young shoots which are positioned at the top of the plant and grow normally and obliquely outwards as nutrient branches (marked at the base parts of the branches by black marker pens) for allowing the young shoots to grow naturally, wherein the number of the young shoots is 20; and cutting off all the shoots extracted from the middle and lower parts of the branches, the trunk and other redundant young shoots.

And after selecting reserved young shoots, spraying an insecticidal and bactericidal agent once every 10-15 days to protect the young shoots, and continuously spraying for 3 times. The insecticidal and bactericidal agent is a mixed solution of 1000 times of 75% chlorothalonil wettable powder and 1000 times of 20% acetamiprid water dispersible granules.

S2, removing the thorn seat:

and (3) cutting thorns for the first time: when the length of the mother branch of the fattening stock reaches 25-35 cm, performing primary thorn cutting, and respectively cutting off the edges of the young shoots and the thorn seats from top to bottom at a position 10cm away from the terminal buds by using a sharp sugarcane peeling knife (or a similar knife), so as to avoid bruising or breaking the terminal buds; the depth of the cutting is just enough to completely remove the pricking seat and the hidden bud below the pricking seat.

And (3) secondary deburring: and (3) carrying out secondary thorn cutting when the length of the mother branch of the fattening stock is 10-15 cm greater than the preset length of the stock, wherein the preset length is 40cm, and the method is the same as the first thorn cutting.

S3, fixed-length topping: after the second cutting step is finished, performing flat cutting and topping immediately at a position 2-3cm higher than the preset length of the fattening stock, wherein the cut is vertical to the xylem; after topping, completely removing the residual thorn bases on the stock mother branches.

S4, leaving trees to fatten: after fixed-length topping is finished, the stock mother branches are left to grow for 3 months, and at the moment, the stock mother branches are developed to be in a full and fat state (fattening for short), so that fattening stocks are obtained. In the fattening process, the organic multi-element foliar fertilizer is sprayed once every 5-10 days.

The organic multi-element foliar fertilizer comprises the following components in percentage by mass and volume: 0.3 percent of urea, 0.2 percent of ammonium sulfate, 0.05 percent of calcium superphosphate, 0.4 percent of diammonium phosphate, 0.3 percent of monopotassium phosphate, 0.65 percent of potassium sulfate, 0.5 percent of magnesium sulfate, 0.0015 percent of manganese sulfate, 0.0012 percent of zinc sulfate, 0.002 percent of boric acid, 0.0002 percent of copper sulfate, 0.0002 percent of ferrous sulfate heptahydrate, 0.0002 percent of sodium molybdate, 0.03 percent of citric acid, 0.7 percent of disodium EDTA, 0.03 percent of sorbamide betaine and the balance of water.

S5, fattening stock harvesting: and (3) cutting off the stock by using sharp branch scissors at the base of the 'fattening stock' of 2-3cm, namely, the finished fattening stock is directly used as the stock for grafting.

Example 3

And after selecting and reserving young shoots, spraying an insecticidal and bactericidal agent once every 10-15 days to protect the young shoots, and continuously spraying for 2 times. The pesticide is a mixed solution of 600 times of 70% thiophanate methyl wettable powder and 800 times of 5% abamectin emulsifiable solution.

S2, removing the thorn seat:

and (3) cutting thorns for the first time: when the length of the mother branch of the fattening stock reaches 25-35 cm, performing primary thorn cutting, and respectively cutting off the edges of the young shoots and the thorn seats from top to bottom at a position 10cm away from the terminal buds by using a sharp sugarcane peeling knife (or a similar knife), so as to avoid bruising or breaking the terminal buds; the depth of the prick is just enough to completely remove the prick seat and the hidden bud below the prick seat.

And (3) secondary deburring: and (3) carrying out secondary thorn cutting when the length of the mother branch of the fattening stock is 10-15 cm greater than the preset length of the stock, wherein the preset length is 60cm, and the method is the same as the first thorn cutting.

S3, fixed-length topping: after the second cutting step is finished, performing flat cutting and topping immediately at the position 2-3cm higher than the preset length of the fattening stock, wherein the cut is vertical to the xylem; after topping, completely removing the residual thorn bases on the stock mother branches.

S4, leaving trees to fatten: after fixed-length topping is finished, the stock mother branches are left to grow for 3 months, and at the moment, the stock mother branches are developed to be in a full and fat state (fattening for short), so that fattening stocks are obtained. And in the fattening process, the organic multi-element foliar fertilizer is sprayed once every 5-10 days.

The organic multi-element foliar fertilizer comprises the following components in percentage by mass and volume: 0.5 percent of urea, 0.1 percent of ammonium sulfate, 0.1 percent of calcium superphosphate, 0.6 percent of diammonium phosphate, 0.2 percent of monopotassium phosphate, 0.6 percent of potassium sulfate, 0.6 percent of magnesium sulfate, 0.0010 percent of manganese sulfate, 0.0015 percent of zinc sulfate, 0.001 percent of boric acid, 0.0001 percent of copper sulfate, 0.0003 percent of ferrous sulfate heptahydrate, 0.0001 percent of sodium molybdate, 0.04 percent of citric acid, 0.5 percent of EDTA disodium salt, 0.05 percent of sorbamide betaine and the balance of water.

Experimental example:

1. time and place of experiment: in 2019, in the Dragon fruit base of fresh sweet agriculture science and technology Limited liability company of Nanning City, the in-tree culture test of the Dragon fruit fattening stock is carried out, and the stock variety is a Vietnam white variety.

2. The experimental method comprises the following steps:

experimental example 1: in accordance with the method of example 1,

s1, selecting young shoots when the young shoots germinate and are extracted for 3-10 cm in 3 months and 15 days.

S2, performing primary thorn cutting when the length of the stock branch of the stock to be fattened reaches 25-35 cm within 3 months and 30 days; and (4) carrying out secondary cutting when the length of the parent branch of the fattening stock is 10-15 cm longer than the preset length of the stock reserved in 4 months and 12 days. See fig. 1 for a detailed illustration and comparison.

And S3, after the second step of cutting thorns is finished, performing flat cutting and topping immediately at the position 2-3cm higher than the preset length of the fattening stock. See fig. 1 for a specific illustration and comparison.

S4, leaving trees to fatten: after fixed-length topping is finished, the stock mother branches are left to grow for 10 days in 6 months, and the fattening stocks are obtained. See figure 2 for a specific illustration and comparison.

S5, fattening stock harvesting: after 6 months and 10 days, the base of the fattening stock is 2-3cm, the stock is cut by sharp branch scissors, namely the finished fattening stock is directly used as the stock for grafting. See figure 3 for a specific illustration and comparison.

Experimental example 2:

compared with experiment 1, the foliar fertilizer of example 2 was applied when "leaving trees for fattening".

Comparative example:

and (3) when the young shoots germinate and grow for 3-10 cm in 15 months in 3, selecting the young shoots, selecting 60 normal growing young shoots which are positioned at the tops of the plants and face upwards as mother branches of the fattening stocks, and marking. Cut at 6 months and 10 days to be used as a stock control example for grafting.

3. And (4) survival rate statistics: the stocks cultured in the experimental examples 1-2 and the comparative example are grafted, after grafting, the grafted seedlings are placed in an environment suitable for rooting and scion healing to be cultured, the post-treatment mode is the same, and then the grafting survival rate, scion sprouting after 60 days and scion new bud length after 60 days are counted, which is shown in the following table 1.

TABLE 1 statistical table for grafting test of different dragon fruit stocks

Treatment of	Survival rate of grafting (%)	Sprouting of the scion after 60 days (%)	Scion sprout length (cm) after 60 days
				Experimental example 1	98.3	98.3	5.14
Experimental example 2	99.2	99.2	5.42
				Comparative example	86.7	11.6	2.65

As shown in Table 1 and experimental examples 1-2, the dragon fruit 'fattening stock' cultivated by the method has higher grafting survival rate and higher growth speed of scion new shoots after survival. And because the dragon fruit 'fattening stock' stock cultivated by the method has no thorn seat and no sprout is extracted in the later period, the management work such as bud picking is conveniently saved, and the seedling cultivation efficiency, effect and economic benefit are improved.

As shown in Table 1 and experimental examples 1-2, the foliar fertilizer provided by the invention provides nutrition for the growth and metabolism of the dragon fruit stems, can further promote the fattening of the stocks, promotes the fleshy edges of the stocks to be full, and further increases the grafting survival rate and scion bud length.

As shown in Table 1, Experimental example 1 and comparison example, the whole process of the culture method of the invention is carried out in trees (not in vitro), and the wounds generated by cutting and topping are not easy to cause infection and decay and can heal quickly because the wounds are not in vitro; and the obtained rootstocks are full of nutrients and full and thick after the tree is fattened, the grafting operation can be greatly facilitated compared with the rootstocks which are not fattened, the scions after grafting can easily obtain sufficient nutrient supply, the healing recovery is fast, the survival rate is high, the scion sprouting rate is high, and the new bud growth speed is fast. As shown in fig. 3, it is evident that the fleshy edges of the stocks are full compared with those of the comparative examples, and the survival rate of grafting can be improved. The stocks in the comparative example cannot be fattened because the stocks are not subjected to topping with fixed length in the early stage, the fleshy edges are not full, and the survival rate after grafting is low.

The above description is directed to the details of the preferred and possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention. All changes and modifications that come within the spirit of the invention are desired to be protected.

Claims

1. An on-tree culture method for dragon fruit fattening stock is characterized by comprising the following steps: comprises selecting young shoots, cutting off thorn seats, topping with fixed length, leaving trees for fattening and fattening anvil for harvesting;

s1, young shoot selection

Selecting a normal growing new shoot which is positioned at the top of the plant and faces upwards as a female branch of a fattening stock;

s2. the thorn seat is removed

S21, first thorn cutting: performing primary thorn cutting when the length of the mother branch of the fattening stock reaches 25-35 cm;

s22, secondary deburring: when the length of the mother branch of the fattening stock is 10-15 cm longer than the preset length of the fattening stock, performing secondary thorn cutting;

s3, fixed-length topping

S31, topping: after the second cutting of the thorns is finished, performing flat cutting and topping immediately at a position 2-3cm higher than the preset length of the fattening stocks, wherein the cut is vertical to the xylem;

s32, repairing and cutting thorns: after topping, completely removing all residual stabs on the mother branches of the fattening stocks;

s4, leaving trees to fatten

After fixed-length topping is finished, leaving the fattening stock mother branches on trees for cultivation for 2-4 months, and enabling the fattening stock mother branches to develop into a full and thick state;

s5, fattening stock harvesting

And (3) shearing the fattened stock mother branches at the 2-3cm positions of the base parts to obtain finished fattened stocks, and directly using the fattened stock mother branches as stock grafting.

2. The in-tree cultivation method of dragon fruit fattening stock according to claim 1, characterized in that: and in the step S1, selecting young shoots when the young shoots germinate and are extracted for 3-10 cm in spring or autumn.

3. The in-tree cultivation method of dragon fruit fattening stock according to claim 1, characterized in that: in the step S1, selecting normal growing young shoots which are positioned at the top of the plant and face upwards as fattening stock mother branches, wherein the number of the young shoots accounts for 60% -80% of the total number of the young shoots; selecting the young shoots which are positioned at the top of the plant and grow normally and obliquely outwards as vegetative branches to allow the young shoots to grow naturally, wherein the number of the young shoots accounts for 20% -40% of the total number of the remained shoots, and cutting off the young shoots which are extracted from the middle lower parts of the branches, the trunk and other redundant young shoots.

4. The in-tree cultivation method of dragon fruit fattening stock according to claim 3, characterized in that: selecting normal growing new shoots which are positioned at the top of the plant and face upwards as fattening stock mother branches, wherein the number of the normal growing new shoots accounts for 75% of the total number of the remaining shoots; and selecting the young shoots which are positioned at the top of the plant and normally grow outwards in an inclined way as vegetative branches for natural growth, wherein the number of the young shoots accounts for 25 percent of the total number of the remained shoots.

5. The in-tree cultivation method of dragon fruit fattening stock according to claim 1, characterized in that: and step S1, after selecting reserved young shoots, spraying an insecticidal and bactericidal agent once every 10-15 days to protect the young shoots, and continuously spraying for 2-3 times.

6. The in-tree cultivation method of dragon fruit fattening stock according to claim 5, characterized in that: the insecticidal and bactericidal agent is a mixed solution of 80% mancozeb wettable powder 600-800 times liquid, 75% chlorothalonil wettable powder 800-1000 times liquid, 70% thiophanate-methyl wettable powder 600-800 times liquid, and 90% trichlorfon emulsifiable 1000 times liquid, 5% abamectin emulsifiable 800 times liquid or 20% acetamiprid water dispersible granule 1000 times liquid.

7. The in-tree cultivation method of dragon fruit fattening stock according to claim 1, characterized in that: in step S2, the specific puncturing step is: and (3) completely removing the edges of the young shoots and the thorn seats from top to bottom at a position 8-12 cm away from the terminal buds, wherein the depth of the thorn cutting is the depth capable of completely removing the thorn seats and the hidden buds below the thorn seats.

8. The in-tree cultivation method of dragon fruit fattening stock according to claim 1, characterized in that: in the step S1, the organic multi-element foliar fertilizer is sprayed once every 5-10 days in the fattening process.

9. The in-tree cultivation method of dragon fruit fattening stock according to claim 8, characterized in that: the organic multi-element foliar fertilizer comprises the following components in percentage by mass and volume: 0.2-0.5% of urea, 0.1-0.3% of ammonium sulfate, 0.01-0.1% of calcium superphosphate, 0.3-0.6% of diammonium phosphate, 0.2-0.4% of monopotassium phosphate, 0.6-0.7% of potassium sulfate, 0.4-0.6% of magnesium sulfate, 0.0010-0.0020% of manganese sulfate, 0.0010-0.0015% of zinc sulfate, 0.001-0.003% of boric acid, 0.0001-0.0003% of copper sulfate, 0.0001-0.0003% of ferrous sulfate heptahydrate, 0.0001-0.0003% of sodium molybdate, 0.02-0.04% of citric acid, 0.5-1.0% of EDTA disodium salt, 0.01-0.05% of sorbitan betaine and the balance of water.