CN113875476B - Planting management method for inhibiting vigorous growth of fruit bearing trees in Gannan Neeher navel orange - Google Patents

Abstract

The invention relates to the technical field of orchard cultivation, in particular to a planting management method for inhibiting vigorous growth of fruit bearing trees of Jiangnan Nehuer navel oranges in summer; in the invention, the navel orange is planted in a cultivation garden, and then the garden base cloth is covered beside the tree, so that rainfall is drained into a ditch along the garden base cloth, rainwater is prevented from directly permeating into soil, a proper water control effect is achieved, when the summer tip of the navel orange tree sprouts sporadically in the last 4 th month, sporadically-emitted new buds are wiped off, an inhibiting medicament is sprayed, chemical tip control is implemented, nitrogen nutrition is controlled, growth of the summer tip is inhibited, growth of the summer tip is controlled in a labor-saving and efficient manner, the tip fruit contradiction is solved, the cost is reduced, and the fruit benefit is improved.

Description

Planting management method for inhibiting vigorous growth of fruit bearing trees in Gannan Neeher navel orange

Technical Field

The invention relates to the technical field of orchard cultivation, in particular to a planting management method for inhibiting vigorous growth of fruit bearing trees of Jiangnan Nehuer navel oranges in summer.

Background

The fruit bearing trees of the Nieher navel orange in the Gannan province can take off and grow 1-2 times in summer in the period from 5 months to 7 months, and the growth period is positive in a high-temperature rainy season, so that the trees are vigorous, long and thick in branches, large amount of nutrients are consumed, and tip fruit contradiction is caused, thus the fruits fall off, the yield is reduced, and the quality is deteriorated. In addition, the vigorous growth of the tip in summer can also cause the crown to be rapidly enlarged and the inner bore to be too dense, thereby increasing the difficulty of preventing and controlling diseases and insect pests such as yellow dragon disease, canker disease and the like and fruit picking.

The traditional method of repeatedly applying tips or spraying chemical agents such as tip killing elements on leaf surfaces is generally adopted in combination with pruning, but the method is labor-consuming and time-consuming, and statistically, the tips are applied in each round by 90 yuan per day for each person, and the tips are applied in each 667 m of orchards with the specification of 2 multiplied by 4 m ² Increase in labor cost by at least 234 yuan, which is not suitable for the current situation of labor shortage; although the later inhibits the growth of young shoots, the threshold value is lower, the soil residual period is long, the defects of leaf curl, fruit deformity and the like are easily caused by improper use concentration, and the growth of trees and the fruit quality are negatively influenced by continuous use.

Based on the above reasons, a new summer young shoot growth regulation and control technology with low labor cost, high efficiency, easy operation and strong safety is urgently needed in production to achieve the effect of inhibiting the vigorous growth of the summer young shoots and even achieving the effect of no summer young shoots for hair-drawing.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide a planting management method for inhibiting vigorous growth of summer shoots of fruit bearing trees of Gannan Nehel navel oranges, which is implemented by spraying an inhibiting medicament, implementing chemical tip control, controlling nitrogen nutrition, inhibiting growth of the summer shoots, realizing labor-saving and efficient control of growth of the summer shoots, solving the tip fruit contradiction, reducing the cost and improving the fruit benefit.

The technical scheme for solving the technical problem is as follows:

a planting management method for inhibiting vigorous growth of summer shoots of fruit bearing trees of Gannan Nehuer navel orange comprises the following steps:

s1, planting navel oranges in a cultivation garden;

s2, covering a gardening ground cloth beside the navel orange tree;

s3, when the navel orange trees sprout sporadically in the summer tip in late 4 months, removing sporadically-emitted new buds, and spraying an inhibiting agent;

and S4, in the summer shoot growth period, applying no nitrogen fertilizer or applying a low-nitrogen high-potassium compound fertilizer.

As an improvement of the invention, in the step S1, on the basis of the original ridging of the cultivation garden, the ridge platform is transformed into an arc-shaped ridge with a wide lower part and a narrow upper part.

As a further improvement of the invention, in the step S1, the width of the bottom surface of the arc-shaped ridge is 2 m, and the height of the arc top is 0.5 m.

As a further improvement of the present invention, in step S2, when the spring tip is mature in late 4 months of the year, the ridge surfaces on both sides of the side of the tree are covered with horticultural ground cloth.

As a further improvement of the present invention, in step S2, the periphery of the gardening ground cloth is pressed with fixing nails or stones.

As a further improvement of the present invention, in step S2, the overlapping area of the two gardening ground fabrics at two sides of the tree side needs to be sealed.

As a further refinement of the present invention, in step S3, the inhibitory agent comprises 5% uniconazole.

As a further improvement of the invention, the inhibiting medicament also comprises Tween-20.

As a further improvement of the present invention, in step S3, the first spraying of the foliage of the navel orange trees is performed after the inhibitor is configured as the uniconazole aqueous solution.

As a further improvement of the present invention, in step S4, monopotassium phosphate or potassium sulfate is applied to the individual flourishing trees or the individual mesoderm trees after the second physiological fruit drop.

In the method, navel oranges are planted in a cultivation garden firstly, and then gardening ground cloth is covered beside the navel oranges, so that rainfall is drained into ditches along the gardening ground cloth, the rainwater is prevented from directly permeating into soil, a proper water control effect is achieved, when the summer tips of the navel orange trees sprout sporadically in 4 months, sporadically-emitted new buds are wiped off, an inhibiting medicament is sprayed, chemical tip control is implemented, nitrogen nutrition is controlled, growth of the summer tips is inhibited, the growth of the summer tips is controlled in a labor-saving and efficient manner, the tip fruit contradiction is solved, the cost is reduced, and the fruit benefit is improved.

Drawings

For ease of illustration, the present invention is described in detail by the following preferred embodiments and the accompanying drawings.

FIG. 1 is a block diagram of the steps 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 described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in figure 1, the planting management method for inhibiting vigorous growth of the fruit bearing trees of the Jiangxian Nehuer navel orange comprises the following steps:

s1, planting navel oranges in a cultivation garden;

s2, covering a gardening ground cloth beside the navel orange tree;

s3, when the navel orange trees sprout sporadically in the summer tip in late 4 months, removing sporadically-emitted new buds, and spraying an inhibiting agent;

and S4, in the summer shoot growth period, applying no nitrogen fertilizer or applying a low-nitrogen high-potassium compound fertilizer.

In the invention, the navel orange is planted in a cultivation garden, and then the garden base cloth is covered beside the tree, so that rainfall is drained into a ditch along the garden base cloth, rainwater is prevented from directly permeating into soil, a proper water control effect is achieved, when the summer tip of the navel orange tree sprouts sporadically in the last 4 th month, sporadically-emitted new buds are wiped off, an inhibiting medicament is sprayed, chemical tip control is implemented to control nitrogen nutrition, the growth of the summer tip is inhibited, the growth of the summer tip is controlled in a labor-saving and efficient manner, the tip fruit contradiction is solved, the cost is reduced, and the fruit benefit is improved.

In the step S1, on the basis of the original ridging of the cultivation garden, ridge stands are reformed into arc-shaped ridges with wide lower parts and narrow upper parts; specifically speaking, the arc ridge is 2 m for the width of ridge surface and the arc top height is 0.5 m, makes things convenient for step S2 to carry out laying of horticulture ground cloth, simultaneously, makes things convenient for the rainfall, makes the rainwater arrange horticulture ground cloth and the arc slope is down to the ditch in, can not ponding on the ridge surface.

In step S2, when the spring tip is mature in late 4 of the year, the ridge surfaces on both sides of the tree are covered with gardening ground cloth, the gardening ground cloth is made of black polyethylene grass-prevention gardening ground cloth, specifically, the periphery of the gardening ground cloth is tightly pressed by fixing nails or stones, and the overlapping part of the two gardening ground cloth on both sides of the tree is well sealed, specifically, when the spring tip is basically mature in late 4 of the year, the ridge surfaces on both sides of the tree are covered with black polyethylene grass-prevention gardening ground cloth with the width of 1.6 m, so that rainfall is drained into the ditch along the ground cloth, rainwater is prevented from directly permeating into soil, and a proper water control effect is achieved.

Within step S3, the inhibitory agent comprises 5% uniconazole and tween-20; in particular, the 5 percent uniconazole is 5 percent wettable powder, and has the functions of controlling vegetative growth, inhibiting cell elongation, shortening internodes, dwarfing plants, promoting lateral bud growth and flower bud formation and enhancing stress resistance; the 5% uniconazole belongs to a high-efficiency plant growth retardant, can dwarf and strong plants, control excessive growth, shorten branch joints, prevent lodging, promote flowering and fructification, promote effective tillering, and has high activity and small using amount; the activity of 5% uniconazole is 6 to 10 times higher than that of paclobutrazol, but the residual quantity of the uniconazole in soil is only 1/10 of that of the paclobutrazol, so that the uniconazole has little influence on the succeeding crops, can be absorbed by seeds, roots, buds and leaves, and can rotate among organs, but the leaf absorption runs outwards less, and the vegetative growth tree shape of the navel orange tree can be controlled; tween 20, also known as polysorbate-20, is prepared by condensation of sorbitol and its mono-and di-anhydro compounds with laurate in the presence of about 20 moles of ethylene oxide per mole of sorbitol and its anhydro compounds under alkaline conditions, which in the present invention functions as an adhesion promoter for uniconazole.

The implementation measures are that in the step S3, the first spraying of the foliage of the navel orange trees is carried out after the inhibiting medicament is prepared into the uniconazole aqueous solution, the second spraying of the foliage of the navel orange trees is carried out after the uniconazole aqueous solution is prepared at intervals of 10 days to 14 days; specifically, when sporadic sprouting in summer early 4 months, sporadic new sprouts are wiped off, then 2 parts of 5% uniconazole wettable powder and 1 part of tween-20 (favorable for attachment) are added into a small amount of water, and finally diluted to 1000/3 times of the dosage of the 5% uniconazole wettable powder, 150 mg/L uniconazole aqueous solution is prepared for foliage spraying, the uniconazole aqueous solution can also be applied together with insecticidal and bactericidal medicaments, if the uniconazole aqueous solution needs to be sprayed once in 4 hours before and after application to prevent rainwater from shortening the effective period, the uniconazole aqueous solution is sprayed for the second time at intervals of 10 to 14 days, the specific time is determined according to the environmental conditions such as air temperature, rainfall and the like, and the method is consistent with the first application.

In the present invention, in step S4, monopotassium phosphate or potassium sulfate is applied to the individual flourishing or mediterranean trees after the second physiological fruit drop; specifically, the application of nitrogen fertilizer is strictly controlled in the summer top growing period, no nitrogen fertilizer or low-nitrogen high-potassium compound fertilizer is applied, after the second physiological fruit drop, 100g to 150 g of monopotassium phosphate or potassium sulfate is applied to the single plant of the vigorous tree or the moderate tree once to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer (purchased in the existing market) is added to the weak tree to balance nutrition.

The invention provides example 1:

step 1, selecting a proper cultivation garden and properly modifying ridge culture conditions; on the basis of the original ridging cultivation in an orchard, ridge platforms can be transformed into arc-shaped ridges with the ridge surface width of 2 m and the arc top height of 0.5 m in a unified mode.

Step 2, fruit tree management

2.1, covering the tree disc with gardening ground cloth to control water; when spring tips are basically mature in 4 middle ten days, black polyethylene grass-prevention gardening ground cloth with the width of 1.6 m is covered on ridge surfaces on two sides of the tree, so that precipitation is drained into a ditch along the ground cloth, rainwater is prevented from directly permeating soil, a proper water control effect is achieved, the gardening ground cloth needs to be tightly covered, the periphery of the gardening ground cloth is required to be tightly pressed by fixing nails or stones, the prevention and the treatment are blown away by wind, meanwhile, the overlapped part of the two ground cloth needs to be sealed, and the trunk is required to be tightly tied to prevent the rainwater from entering a tree disc through a gap between the trunk and the ground cloth.

Chemical tip control; when the summer early buds sprout sporadically in 4 months, the sporadically-emitted new buds are wiped off, then 2 parts of 5% uniconazole wettable powder and 1 part of tween-20 (which is favorable for attachment) are added into a small amount of water, the mixture is finally diluted to 1000/3 times of the dosage of the 5% uniconazole wettable powder, 150 mg/L uniconazole aqueous solution is prepared for foliage spraying, the pesticide and the sterilization medicament can also be applied together, if the mixture meets precipitation within 4 hours before and after application, the rain water is prevented from shortening the lasting period, the second spraying is carried out at intervals of 10-14 days, the specific time is determined according to the environmental conditions such as air temperature and precipitation, and the method is consistent with the first spraying.

Controlling nitrogen nutrition; in the growing period of summer shoots, the application of nitrogen fertilizer is strictly controlled, no nitrogen fertilizer or low-nitrogen high-potassium compound fertilizer is applied, after the second physiological fruit drop, 100-150 g of monopotassium phosphate or potassium sulfate is applied to a single plant of the vigorous trees or the moderate trees once to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer is added to weak trees to balance nutrition.

The invention provides four further comparative examples, as follows:

comparative example 1:

step 1, selecting a proper cultivation garden and appropriately modifying ridge culture conditions; on the basis of the original ridging cultivation in an orchard, ridge platforms can be transformed into arc-shaped ridges with the width of the bottom surface being 2 m and the height of the arc top being 0.5 m in a unified mode.

Step 2, management of fruit trees

2.1, covering the tree disc with gardening ground cloth to control water; when spring tips are basically mature in 4 middle ten days, black polyethylene grass-prevention gardening ground fabrics with the width of 1.6 m are covered on ridge surfaces on two sides of the tree, so that precipitation is drained into a ditch along the ground fabrics, rainwater is prevented from directly permeating soil, a proper water control effect is achieved, the gardening ground fabrics need to be tightly covered, the periphery of the gardening ground fabrics is required to be tightly pressed by fixing nails or stones, the prevention and the treatment are blown away by wind, meanwhile, the overlapped part of the two ground fabrics needs to be sealed, and the trunk is required to be tightly tied to prevent the rainwater from entering a tree disc through a gap between the trunk and the ground fabrics.

Controlling nitrogen nutrition; in the growing period of summer shoots, the application of nitrogen fertilizer is strictly controlled, no nitrogen fertilizer or low-nitrogen high-potassium compound fertilizer is applied, 100-150 g of monopotassium phosphate or potassium sulfate is applied to a single plant of the vigorous trees or the moderate trees once after the second physiological fruit drop to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer is added to weak trees to balance nutrition.

Comparative example 1 differs from example 1 in that no chemical tip control is performed in step 2.

Comparative example 2:

step 1, selecting a proper cultivation garden and properly modifying ridge culture conditions; on the basis of the original ridging cultivation in an orchard, ridge platforms can be transformed into arc-shaped ridges with the width of the bottom surface being 2 m and the height of the arc top being 0.5 m in a unified mode.

Step 2, management of fruit trees

2.1, covering the tree disc with gardening ground cloth to control water; when spring tips are basically mature in 4 middle ten days, black polyethylene grass-prevention gardening ground fabrics with the width of 1.6 m are covered on ridge surfaces on two sides of the tree, so that precipitation is drained into a ditch along the ground fabrics, rainwater is prevented from directly permeating soil, a proper water control effect is achieved, the gardening ground fabrics need to be tightly covered, the periphery of the gardening ground fabrics is required to be tightly pressed by fixing nails or stones, the prevention and the treatment are blown away by wind, meanwhile, the overlapped part of the two ground fabrics needs to be sealed, and the trunk is required to be tightly tied to prevent the rainwater from entering a tree disc through a gap between the trunk and the ground fabrics.

Chemical tip control; when the summer tip sprouts sporadically in 4 th month late ten days, new sprouts sent sporadically are wiped off, then 2 parts of 5% uniconazole wettable powder and 3 parts of tween-20 (which is favorable for attachment) are added into a small amount of water, the mixture is finally diluted to 1000 times of the dosage of the 5% uniconazole wettable powder, 50 mg/L uniconazole aqueous solution is prepared for foliage spraying, the pesticide and the bactericide are also applied together, if the mixture needs to be sprayed again when meeting rainfall within 4 hours before and after application to prevent the lasting period from being shortened by rainwater, the second spraying is carried out at intervals of 10-14 days, the specific time is determined according to the environmental conditions such as air temperature, rainfall, and the method is consistent with the first spraying.

Controlling nitrogen nutrition; in the growing period of summer shoots, the application of nitrogen fertilizer is strictly controlled, no nitrogen fertilizer or low-nitrogen high-potassium compound fertilizer is applied, 100-150 g of monopotassium phosphate or potassium sulfate is applied to a single plant of the vigorous trees or the moderate trees once after the second physiological fruit drop to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer is added to weak trees to balance nutrition.

Comparative example 2 differs from example 1 in the concentration of the 5% aqueous solution of uniconazole in the 2.2 embodiment of step 2.

Comparative example 3:

step 1, selecting a proper cultivation garden and properly modifying ridge culture conditions; on the basis of the original ridging cultivation of the orchard, ridge platforms can be transformed into arc-shaped ridges with the bottom width of 2 m and the arc top height of 0.5 m in a unified mode.

Step 2, fruit tree management

2.1, covering the tree disc with gardening ground cloth to control water; when the spring tips are basically mature in 4 middle of the month, black polyethylene grass-prevention gardening base cloth with the width of 1.6 m is covered on ridge surfaces of two sides of the tree, so that rainfall is drained into the ditch along the base cloth, rainwater is prevented from directly permeating into soil, a proper water control effect is achieved, the gardening base cloth needs to be tightly covered, the periphery of the garden base cloth needs to be tightly pressed by fixing nails or stones, the prevention and the control are blown away by wind, meanwhile, the overlapping part of the two base cloth needs to be sealed, and the trunk needs to be tightly tied to prevent rainwater from entering a tree disc through a gap between the trunk and the base cloth.

Chemical tip control; when the summer early sprouts sporadically sprout in 4 months, sporadically sprout, then 2 parts of 15% paclobutrazol wettable powder and 1 part of tween-20 (which is beneficial to attachment) are added into a small amount of water, and finally the mixture is diluted to 300 times of the dosage of the 15% paclobutrazol wettable powder, and is prepared into 500 mg/L paclobutrazol aqueous solution for foliage spraying, and can also be applied together with insecticidal and bactericidal medicaments, if the paclobutrazol wettable powder needs to be sprayed once within 4 hours before and after application to prevent rainwater from shortening the effective period, the second spraying is carried out at intervals of 10-14 days, the specific time is determined according to the environmental conditions such as air temperature, rainfall and the like, and the method is consistent with the first spraying.

Controlling nitrogen nutrition; in the growing period of summer shoots, the application of nitrogen fertilizer is strictly controlled, no nitrogen fertilizer is applied or high-nitrogen low-potassium compound fertilizer is applied, 100-150 g of monopotassium phosphate or potassium sulfate is applied to a single plant of the vigorous trees or the moderate trees once after the second physiological fruit drop to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer is added to weak trees to balance nutrition.

Comparative example 3 differs from comparative example 2 and example 1 in the fact that the concentration of the 5% aqueous solution of uniconazole in the 2.2 embodiment of step 2 is different.

Comparative example 4:

step 1, selecting a proper cultivation garden and appropriately modifying ridge culture conditions; on the basis of the original ridging cultivation of the orchard, ridge platforms can be transformed into arc-shaped ridges with the bottom width of 2 m and the arc top height of 0.5 m in a unified mode.

Step 2, fruit tree management

2.1, chemically controlling shoots; when the summer tip sprouts sporadically in 4 th month, new sprouts sent sporadically are wiped off, then 2 parts of 5% uniconazole wettable powder and 1 part of tween-20 (favorable for attachment) are added into a small amount of water, the mixture is finally diluted to 1000/3 times of the dosage of the 5% uniconazole wettable powder, 150 mg/L uniconazole aqueous solution is prepared for foliage spraying, the pesticide and the bactericide are applied together, if the mixture meets precipitation within 4 hours before and after application, the mixture needs to be sprayed once to prevent rainwater from shortening the lasting period, the mixture is sprayed for the second time at intervals of 10-14 days, the specific time is determined according to the environmental conditions such as air temperature, precipitation and the like, and the method is consistent with the first application.

Controlling nitrogen nutrition; in the growing period of summer shoots, the application of nitrogen fertilizer is strictly controlled, no nitrogen fertilizer or low-nitrogen high-potassium compound fertilizer is applied, after the second physiological fruit drop, 100-150 g of monopotassium phosphate or potassium sulfate is applied to a single plant of the vigorous trees or the moderate trees once to achieve the fruit strengthening effect, and 18-8-16 citrus special fertilizer is added to weak trees to balance nutrition.

Comparative example 4 is different from example 1 in that the tree tray in comparative example 4 does not cover the horticultural ground cloth to control water and does not perform the tip control treatment.

After the first summer young aged period (in the first 6 th), the length of the summer young and the number of the summer young of the example 1 and the comparative examples 1 to 4 were counted, and fruit samples were taken at the mature period of the fruit (in the second 11 th), and the yield and quality were measured, and the results are shown in table 1:

table 1:

as shown in Table 1 above, the yield per unit volume, the fruit soluble solid content at the mature period and the juice yield of example 1 were all significantly higher than those of comparative examples 1 to 4, while the summer tip length, the fruit peel thickness at the mature period and the fruit cross diameter were all significantly lower than those of comparative examples 1 to 4, and the summer tip tree of example 1 was significantly lower than those of comparative examples 1, 3 and 4, and only slightly higher than that of comparative example 2.

The above shows that with the method according to the invention: covering the tree disc with gardening ground cloth to control water when the spring tip is basically mature in middle ten months; spraying 150 mg/L uniconazole on leaf surfaces when summer tips germinate sporadically in late ten months; the planting method can reduce the growth of summer tips, the thickness of fruit peels and the transverse diameters of fruits, increase the unit volume yield and the soluble solid content of the fruits, reduce the average transverse diameter less than 85 mm, reduce the number of large fruits with thick peels, and has better inhibiting effect on the hair-drawing and lengthening of the summer tips than the spraying treatment of 500 mg/L paclobutrazol, in addition, as a triazole plant growth regulator, the biological activity of uniconazole is 6-10 times that of paclobutrazol, the soil residue is lower, and the planting method is more environment-friendly and efficient.

The method mainly aims at the problems of high labor cost or adverse effects on soil, tree bodies and fruits in the traditional summer shoot management and control measures for Gannan Neeher navel oranges, and the like, and is technically improved and innovated, the daily cultivation management is combined, the summer shoot growth is controlled in a labor-saving and efficient manner, the shoot-fruit contradiction is solved, the cost is reduced, and the fruit benefit is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (2)

1. A planting management method for inhibiting vigorous growth of fruit bearing trees on Jiangxian Newhall navel oranges is characterized by comprising the following steps:

s1, navel oranges are planted in a cultivation garden, and ridge platforms are transformed into arc-shaped ridges with ridge surface width of 2 m and arc top height of 0.5 m, wherein the arc-shaped ridges are wide at the bottom and narrow at the top on the basis of original ridge forming of the cultivation garden;

s2, when spring tips are basically mature in late ten days in 4 months, covering black polyethylene grass-prevention gardening ground fabrics with the width of 1.6 m on ridge surfaces on two sides of the navel orange tree, enabling rainfall to be arranged into a ditch along the ground fabrics, preventing rainwater from directly permeating soil, pressing the periphery of the gardening ground fabrics tightly by using fixing nails or stones, sealing the overlapped part of the two gardening ground fabrics, and tightening a trunk to prevent rainwater from entering a tree disc through a gap between the trunk and the ground fabrics;

s3, when the summer early buds sprout sporadically in 4-month late ten days, removing sporadically-emitted new buds, adding 2 parts of 5% uniconazole wettable powder and 1 part of tween-20 into a small amount of water, diluting to 1000/3 times of the dosage of the 5% uniconazole wettable powder, preparing 150 mg/L uniconazole aqueous solution to carry out foliage spraying on the navel orange trees, carrying out complementary spraying once when meeting rainfall within 4 hours before and after application to prevent the rainwater from shortening the lasting period, carrying out secondary spraying at intervals of 10-14 days, determining specific time according to the air temperature and rainfall environment conditions, and ensuring that the method is consistent with the first spraying;

and S4, in the summer shoot growth period, applying no nitrogen fertilizer or applying a low-nitrogen high-potassium compound fertilizer.

2. The method for growing and managing the sharp growth of the bearing trees of the Gannan Nehuer navel orange according to claim 1, wherein in step S4, monopotassium phosphate or potassium sulfate is applied to the single plant of the vigorous tree or the moderate tree after the second physiological fruit drop.

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