A delayed cultivation method of crisp honey kumquats

Abstract

This invention relates to the field of fruit tree cultivation technology, specifically to a method for delayed cultivation of Crispy Honey Kumquat. The key technical points include the following steps: S1, Flowering period control: thinning early flowers and retaining late flowers; S2, Integrated water and fertilizer management: controlling nitrogen and increasing potassium during fruit enlargement, controlling water during the color-changing period, and maintaining moisture during the extended shelf-life period; S3, Tree nutrition and hormone balance: spraying growth regulators and trace elements to maintain leaf integrity; S4, Facility environment control: constructing rain shelters and taking insulation measures during low temperatures; S5, Pest and disease control and tree vigor optimization: pruning for ventilation, cleaning diseased leaves and fruits, and spraying fungicides and insecticides. This invention, by thinning early flowers, retaining mid-to-late batches of inflorescences, and combining rain shelters and water and fertilizer control, extends the harvest period of Crispy Honey Kumquat to January-February of the following year, achieving staggered market entry while ensuring fruit quality. This invention is based on optimized integration of conventional agronomic measures, requires no expensive equipment, is simple and easy to operate, and has extremely high promotion and application value.

Description

Technical Field

[0001] This invention relates to the field of fruit tree cultivation technology, specifically to a method for delayed cultivation of crisp honey kumquats. Background Technology

[0002] Crispy Honey Kumquat (Citrofortunella microcarpa 'Cuimi'), a high-end citrus fruit variety, is highly favored by consumers for its crisp peel, high juiciness, high sweetness, and low tartness. However, the ripening period of Crispy Honey Kumquat is currently concentrated in November and December each year, leading to a concentrated market supply, uneven distribution, and significant price fluctuations. This also makes it difficult to meet the demand for high-end fruit during holidays such as New Year's Day and the Spring Festival. This concentrated ripening characteristic limits fruit farmers' ability to regulate the market supply and improve economic benefits, and is also detrimental to the long-term market promotion of the Crispy Honey Kumquat brand.

[0003] While some existing technologies attempt to alter flowering time through pruning or nutrient regulation, a systematic and standardized approach to delaying harvesting is still lacking. In practical production, simply "delaying harvesting" often faces significant challenges: 1. Delayed fruit hanging on the tree is often accompanied by severe physiological fruit drop and fruit dehydration; 2. Leaving the fruit on the tree for too long can easily lead to a decrease in sugar content, a bland flavor, or a reverting of the fruit peel to green. 3. Crispy honey kumquats have thin peels that are easily cracked. During the ripening period, continuous rain in winter can easily induce anthracnose and large-scale fruit cracking. Low temperature frost can even lead to total crop failure.

[0004] Therefore, there is an urgent need to develop a delayed cultivation method for Crispy Honey Kumquat that integrates precise regulation of flowering period, coordinated water and fertilizer management, rain and cold protection facilities, and tree nutrition balance, so as to achieve staggered market launch and maintain high-end fruit quality. To solve the above problems, this application proposes a delayed cultivation method for Crispy Honey Kumquat. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a method for delayed cultivation of crisp honey kumquats, solving the problems mentioned in the background art.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A method for delaying the cultivation of crisp honey kumquats includes the following steps: S1. Flowering period control: Remove the first and second batches of flower buds that appear on the plant from April to June to inhibit early fruit set; retain the inflorescences that open from July to September as the main fruiting flowering period; S2. Integrated water and fertilizer management: Control nitrogen fertilizer application during the fruit enlargement period and increase potassium and phosphorus fertilizer application; apply water stress treatment during the fruit coloring period to control soil moisture content at 50%-60%; after entering the extended shelf life, keep the soil moist through irrigation to maintain soil moisture content at 60%-70%; S3. Tree nutrition and hormone balance: After flowering and during the physiological fruit drop period, spray plant growth regulators and trace elements on the leaves; and before harvest, keep the tree leaves intact, do not prune fallen leaves, and spray foliar fertilizer to maintain leaf photosynthesis. S4. Facility and environmental control: Build rain shelters before the fruit ripens; take insulation measures when the ambient temperature drops below 5℃, so that the fruit can remain on the tree until January or February of the following year for harvesting; S5. Pest and disease control and tree vigor optimization: Maintain tree ventilation and light penetration through pruning, remove diseased leaves and fruits, and spray fungicides and insecticides during key periods.

[0007] Preferably, in step S1, the frequency of thinning flower buds is once a week.

[0008] Preferably, in step S1, the retained inflorescences are the third batch of inflorescences that open from late July to mid-August.

[0009] Preferably, in step S2, during the fruit enlargement period, 0.3 kg of potassium sulfate is applied to each plant.

[0010] Preferably, in step S3, the plant growth regulator is selected from at least one of gibberellin (GA3) and cytokinin (BA), and its spraying concentration is 10-30 ppm; the trace elements include boron and zinc.

[0011] Preferably, in step S3, the foliar fertilizer is selected from amino acid fertilizer or seaweed fertilizer.

[0012] Preferably, in step S4, the rain shelter is built between late October and early November.

[0013] Preferably, in step S4, the heat preservation measures include covering the greenhouse with film or spraying antifreeze; the critical temperature for implementing the heat preservation measures is when the nighttime temperature drops below 3°C.

[0014] Preferably, the pests and diseases controlled in step S5 include anthracnose, spider mites, and sooty mold.

[0015] Preferably, the soluble solids content of the fruit harvested at a later time is ≥22% achieved by the method.

[0016] In summary, the present invention has the following main beneficial effects: This invention successfully extends the harvest period of Crispy Honey Kumquats from the traditional November-December to January-February of the following year by thinning out early flowers, retaining mid-to-late-season inflorescences, and combining rain-sheltered facilities. This effectively fills the market gap during festivals such as New Year's Day and the Spring Festival, achieving staggered market entry. At the same time, under the protection of rain-sheltered facilities, the delayed harvest results in cleaner fruit surfaces with higher gloss, effectively avoiding the outbreaks of diseases such as fruit cracking, fruit drop, and anthracnose caused by winter rainfall in traditional open-field cultivation. This makes the fruit meet the standards of high-end gift fruit, significantly improving economic benefits.

[0017] This invention solves the common quality degradation problem in delayed harvesting by precisely regulating water and fertilizer and maintaining leaf health. The fruits accumulate more nutrients due to the longer time they are on the tree, with a soluble solids content of over 22% and a richer flavor than conventional fruits. This technical solution is based on the optimization and integration of conventional agronomic measures, requires no expensive equipment investment, is simple and easy to operate, and greatly enhances the tree's resistance to risks while maintaining the tree's nutritional balance. It has extremely high value for promotion and application. Attached Figure Description

[0018] Figure 1 This is a flowchart of the delayed cultivation method according to an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0021] Example 1 refer to Figure 1 This embodiment is used to verify the effectiveness of the delayed cultivation method of Crispy Honey Kumquat under typical production area conditions. The test site was a Crispy Honey Kumquat orchard in Rong'an area of ​​Guangxi. The test trees were 3-year-old grafted Crispy Honey Kumquat trees with moderate to vigorous growth, normal cultivation and management conditions, and the orchard had flat terrain and convenient irrigation and drainage.

[0022] Example 1: Standard Optimal Delayed Cultivation Type Experimental subjects and environmental conditions: Three-year-old grafted kumquat trees with a typical urban climate in Rong'an, Guangxi were selected, with a spacing of 2×3 meters between trees. The soil was sandy loam with a pH of 6.0-6.5 and an organic matter content of approximately 2.5%. The average daily temperature was 20-30℃, the minimum nighttime temperature was 8-12℃, there was ample sunshine, and the annual rainfall was approximately 1400mm, ensuring that the light, temperature, and humidity conditions for the fruit trees were at their typical optimal levels.

[0023] Steps and operations: 1. Flowering period regulation Thinning out early flowers: From April to June, inspect the orchard once a week and manually remove the first and second batches of flower buds that appear on the plants to ensure that early fruits do not form.

[0024] Retain late-blooming flowers: The third batch of inflorescences, which open from late July to mid-August, is the main fruiting flowering period, and flower thinning should be stopped. Focus on monitoring the number of inflorescences, ensuring that each tree retains about 30-50 inflorescences to balance fruit load and tree nutrition.

[0025] Flowering period recording and batch management: Record the flowering date and fruit set of each tree to ensure that the fruit is produced in the middle and late batches.

[0026] 2. Integrated water and fertilizer management Fruit enlargement period (September to October): Control the amount of nitrogen fertilizer applied, applying only 15-20g of urea per plant to prevent excessive vegetative growth.

[0027] Apply 0.3 kg / plant of potassium sulfate and 0.2 kg / plant of superphosphate to promote sugar accumulation and fruit peel coloring.

[0028] Depending on the soil moisture, water each plant with about 10L of water per week to keep the soil moist but not waterlogged.

[0029] Fruit color-changing period (October to November): For mild water stress, the soil moisture content should be controlled at 50%-60% to slow down fruit metabolism and prolong the fruit's hanging time on the tree.

[0030] Monitor soil moisture content to prevent abnormal fruit drop caused by excessive drought.

[0031] Extended shelf life (December to January of the following year): Keep the soil moderately moist, maintaining a moisture content of 60%-70%.

[0032] Irrigation should be about 15L per tree per week to ensure that the fruit can maintain a balance of sugar and peel moisture even when it is hanging on the tree for a long time.

[0033] 3. Balance of tree nutrition and hormones After flowering and during the physiological fruit drop period: Foliar spraying of plant growth regulators: 20 ppm of a mixture of gibberellin (GA3) and cytokinin (BA), spray about 200 mL per plant, evenly covering the leaves and fruit stalks.

[0034] Supplement with trace elements: boron 0.5g / L, zinc 0.3g / L, to prevent fruit stalks from weakening.

[0035] Leaf maintenance: Keep the leaves of the tree intact before harvesting and do not prune fallen leaves.

[0036] Foliar fertilizer application: Spray 200mL of amino acid fertilizer or seaweed fertilizer per plant every two weeks to maintain the photosynthetic capacity of the leaves.

[0037] 4. Facility and environmental control Rain shelter construction: From late October to early November, construct a simple plastic greenhouse with a height of 2.5m and cover the surface with a 0.12mm thick PE film to ensure that rainwater does not come into contact with the fruit.

[0038] Winter insulation: When the nighttime temperature drops below 5℃, cover the greenhouse with plastic film and spray antifreeze to prevent frost damage and ensure that the fruit can be safely harvested from January to February of the following year.

[0039] Temperature and humidity monitoring: Set up temperature and humidity monitoring in the greenhouse, record the nighttime temperature and humidity in the greenhouse every day, and adjust the ventilation openings or heating facilities as necessary.

[0040] 5. Pest and disease control and tree vigor optimization Disease management: Focus on the prevention and control of anthracnose, spider mites and sooty mold, and clean up diseased fruit and prune leaves once a month.

[0041] Pesticide spraying: During the critical period, use low-toxicity and low-residue fungicides (such as difenoconazole 0.1%) and insecticides (such as imidacloprid 0.05%), spraying about 200mL per plant.

[0042] Ventilation and light penetration: Prune dense branches to ensure ventilation and light penetration for the trees inside the greenhouse, reducing the occurrence of diseases.

[0043] 6. Harvesting and Fruit Quality Harvesting time: The delayed fruits will be harvested starting in mid-January of the following year.

[0044] Fruit quality: Soluble solids content ≥22%, fruit weight about 15-20g / fruit, crisp skin, sweet taste without sourness or astringency, market price is about 50% higher than that of fruits harvested in November.

[0045] In summary, by strictly adhering to standard parameters, operating time, and environmental management in this embodiment, the standard delayed fruiting of Crispy Honey Kumquats can be achieved, ensuring high sugar content and crisp taste of the fruit, while avoiding the risks of fruit cracking, fruit drop, and disease, thus providing fruit farmers with a high-economic-value delayed cultivation solution.

[0046] Example 2: Delayed Cultivation Type in Extreme Environments Experimental subjects and environmental conditions: Three-year-old grafted crisp honey kumquat trees were selected from a high-altitude mountainous area in Yunnan (approximately 1800m above sea level). The orchard soil was sandy loam with a pH of 6.0-6.5 and an organic matter content of approximately 2.5%. The average daily temperature was 15-25℃, with nighttime lows dropping to 2-5℃. Light intensity was low, diurnal temperature range was large, and annual precipitation was approximately 1000mm. This region has low winter temperatures and a high risk of frost, making it a typical example of an extreme environment for delayed fruit setting.

[0047] Steps and Operations 1. Flowering period regulation Thinning of early flowers: From April to June, inspect the orchard once a week and manually remove the first and second batches of flower buds that appear on the plants, at a frequency that meets the boundary value of the claims, to ensure that early fruits do not form.

[0048] Retain late-blooming flowers: The third batch of inflorescences that open from late July to mid-August is the main fruiting flowering period. Retain about 25-40 inflorescences per plant, stop thinning flowers, and ensure that the mid-to-late batch of inflorescences set fruit.

[0049] Flowering period recording and batch management: Record the flowering date and fruit set of each tree to ensure that the fruit is produced in the middle and late batches.

[0050] 2. Integrated water and fertilizer management Fruit enlargement period (September to October): Control the amount of nitrogen fertilizer applied to the limit value, about 15g of urea per plant, to avoid excessive vegetative growth.

[0051] Apply 0.3 kg / plant of potassium sulfate and 0.2 kg / plant of superphosphate to promote sugar accumulation and fruit peel coloring.

[0052] Depending on the soil moisture, water each plant with about 8-10L of water per week to keep the soil moist but not waterlogged.

[0053] Fruit color-changing period (October to November): The water stress treatment is more intense, controlling the soil moisture content at 50% (the minimum boundary value), slowing down the fruit's metabolic rate and extending the time the fruit hangs on the tree.

[0054] Daily monitoring of soil moisture is necessary to prevent excessive dryness that could lead to abnormal fruit drop.

[0055] Extended shelf life (December to January of the following year): Keep the soil moist, with a water content of 60%-65%.

[0056] Each tree is irrigated with approximately 15 liters of water per week to ensure a balance between sugar content and peel moisture during the fruit's growth period.

[0057] 3. Balance of tree nutrition and hormones After flowering and during the physiological fruit drop period: Foliar spraying of plant growth regulators: 20 ppm of a mixture of gibberellin (GA3) and cytokinin (BA), spray about 200 mL per plant, evenly covering the leaves and fruit stalks.

[0058] Supplement with trace elements: boron 0.5g / L, zinc 0.3g / L, to prevent fruit stalks from weakening.

[0059] Leaf maintenance: Keep the leaves of the tree intact before harvesting and do not prune fallen leaves.

[0060] Foliar fertilizer application: Spray 200mL of amino acid fertilizer or seaweed fertilizer per plant every two weeks to maintain the photosynthetic capacity of the leaves.

[0061] 4. Facility and environmental control Rain shelter construction: Construct reinforced plastic greenhouses from late October to early November, with a height of 2.5m and a PE film thickness of 0.15mm to increase wind resistance.

[0062] Winter insulation: When the nighttime temperature drops to 2℃, insulation measures (covering the greenhouse with film + spraying antifreeze) will be activated to ensure that the fruit can be safely harvested from January to February of the following year.

[0063] Temperature and humidity monitoring: Set up temperature and humidity monitoring in the greenhouse, record the nighttime temperature and humidity in the greenhouse every day, and close the ventilation openings or add heating equipment when necessary to prevent frost.

[0064] 5. Pest and disease control and tree vigor optimization Disease management: Focus on the prevention and control of anthracnose, spider mites and sooty mold, and clean up diseased fruit and prune leaves once a week.

[0065] Pesticide spraying: During the critical period, use a low-toxicity, low-residue fungicide (0.1% difenoconazole) and an insecticide (0.05% imidacloprid), spraying approximately 200 mL per plant.

[0066] Ventilation and light penetration: Prune dense branches to ensure ventilation and light penetration for the trees inside the greenhouse, reduce the occurrence of diseases, and promptly remove damaged fruits.

[0067] 6. Harvesting and Fruit Quality Harvesting time: Delayed fruits are harvested from the end of January to the beginning of February of the following year.

[0068] Fruit quality: Soluble solids content ≥22%, fruit weight approximately 15g / fruit, crisp peel, sweet taste without sourness or astringency, quality close to Example 1.

[0069] In summary, this embodiment verifies that even in extreme environments with high altitude, low temperature, and low light, by thinning flowers, controlling water, and implementing measures such as facility insulation and rain protection, it is still possible to delay fruiting and harvest high-quality fruit in the Crispy Honey Kumquat, demonstrating the applicability and operability of the method of the present invention under extreme environmental conditions.

[0070] Example 3: Large-scale industrial delayed cultivation Test subjects and environmental conditions A contiguous orchard of approximately 300 mu (about 20 hectares) was selected in Rong'an County, Guangxi Province. The orchard consists of 3-year-old grafted crisp honey kumquat trees, spaced 2 x 3 meters apart. The soil is sandy loam with a pH of 6.0-6.5 and an organic matter content of approximately 2.5%. The average daily temperature is 20-30℃, with a minimum nighttime temperature of 8-12℃, ample sunshine, and an annual rainfall of approximately 1400 mm. An automated system is used for water and fertilizer management and pest and disease control to meet the needs of large-scale industrial operations.

[0071] Steps and Operations 1. Flowering period regulation Thinning out early flowers: From April to June, mechanical inspections combined with manual assistance are used to remove the first and second batches of flower buds once a week to control early fruit formation.

[0072] Retain late-blooming flowers: The third batch of inflorescences that open from late July to mid-August is the main fruiting flowering period. Retain about 30-50 inflorescences per plant to ensure that the mid-to-late batch of inflorescences set fruit.

[0073] Flowering period recording and batch management: Electronic tags are used in the orchard to record the opening of inflorescences and fruit setting, so as to achieve unified management of large-scale trees.

[0074] 2. Integrated water and fertilizer management Fruit enlargement period (September to October): Nitrogen fertilizer application should be controlled at 15-20g / plant to prevent excessive vegetative growth.

[0075] Apply 0.3 kg / plant of potassium sulfate and 0.2 kg / plant of superphosphate.

[0076] An automatic drip irrigation system is used, with each plant receiving approximately 10 liters of water per week to keep the soil moist.

[0077] Fruit color-changing period (October to November): Control the soil moisture content to 50%-60% to slow down fruit metabolism.

[0078] Extended shelf life (December to January of the following year): The automatic irrigation system keeps the soil moist, with a water content of 60%-70%, ensuring a balance of sugar content and peel moisture in fruits that remain on the tree for extended periods.

[0079] 3. Balance of tree nutrition and hormones After flowering and during the physiological fruit drop period, apply 20 ppm gibberellin (GA3) + cytokinin (BA) to the leaves using a drone or sprayer, about 200 mL per plant, evenly covering the leaves and fruit stalks.

[0080] Supplement with trace elements boron 0.5g / L and zinc 0.3g / L.

[0081] Before harvesting, keep the tree leaves intact and do not prune fallen leaves. Apply foliar fertilizer using mechanized methods, using 200mL of amino acid fertilizer or seaweed fertilizer per tree every two weeks to maintain photosynthetic capacity.

[0082] 4. Facility and environmental control Before the fruit ripens (late October to early November), a simple plastic greenhouse is built, 2.5m high, with a PE film thickness of 0.12mm, covering the key areas of the orchard.

[0083] When the nighttime temperature drops below 5℃, cover the greenhouse with plastic film and spray with antifreeze to ensure that the fruit can remain on the tree until January or February of the following year for harvest.

[0084] Equipped with a temperature and humidity monitoring system, it allows for centralized management of the entire orchard environment.

[0085] 5. Pest and disease control and tree vigor optimization Prune branches to ensure ventilation and light penetration, and remove diseased leaves and fruits.

[0086] During the critical period, use a low-toxicity, low-residue fungicide (0.1% difenoconazole) and an insecticide (0.05% imidacloprid) to evenly cover each plant using mechanical spraying, approximately 200 mL per plant.

[0087] Large-scale orchard management employs a combination of patrol inspections and sensor monitoring to promptly detect diseases.

[0088] 6. Harvesting and Fruit Quality Harvesting time: mid-January to early February of the following year.

[0089] Fruit quality: Soluble solids content ≥22%, fruit weight approximately 15-20g / fruit, crisp skin, sweet taste without sourness or astringency.

[0090] In summary, this embodiment demonstrates the feasibility of delayed cultivation of Crispy Honey Kumquat under large-scale industrialization conditions. By adopting automated water and fertilizer management, mechanized application of hormones and foliar fertilizers, and centralized pest and disease control, delayed fruiting and high fruit quality are guaranteed, while saving manpower and improving operational convenience and economic benefits.

[0091] Example 4 1. Conventional cultivation control type Experimental subjects: Three-year-old grafted kumquat trees from Rong'an area of ​​Guangxi were selected and conventionally cultivated in open fields without thinning early flowers or building sheds.

[0092] Operating method: conventional water and fertilizer management, harvested in November, no foliar hormone regulation was carried out, and no rain or frost protection was provided.

[0093] Pest and disease management: Conventional prevention and control measures were implemented, but anthracnose, spider mites, and sooty mold were not prioritized for control.

[0094] 2. Comparison Table The following table compares the key parameters of the delayed-cultivation type and the conventional cultivation control type in Examples 1 to 3. The comparison mainly includes flowering management, water and fertilizer management, hormone and foliar fertilizer application, facility environment management, pest and disease control measures, harvest time, and fruit quality and selling price.

[0095] 3. Summary By comparing Examples 1 to 3 with the conventional cultivation control type, the following conclusions can be drawn: The control group fruits were harvested in November, and their sugar content, fruit weight, and taste were all lower than those of the delayed-harvest examples. They were also more susceptible to rain and disease. Therefore, Examples 1-3 extended the harvest period of Crispy Honey Kumquats from the traditional November-December to January-February of the following year, or even later, by thinning out early flowers, retaining mid-to-late batches of inflorescences, and combining rain-sheltered and heat-insulating facilities. This achieved staggered market entry, and the soluble solids content of the delayed-harvest fruits was ≥22%, the fruit weight was 15-20g / fruit, the peel was crisp, and the taste was sweet without being sour or astringent. Compared with the fruits obtained under conventional management, the quality was significantly improved, fully demonstrating the innovation and practical value of this invention.

[0096] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that, unless otherwise defined, the technical or scientific terms used in this invention should be understood in the ordinary sense by those skilled in the art to which this invention pertains, and the terms "comprising" or "including" or similar terms used in this invention mean that the element or object preceding the word covers the element or object listed after the word and its equivalents.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for delayed cultivation of crisp honey kumquats, characterized in that, Includes the following steps: S1. Flowering period control: Remove the first and second batches of flower buds that appear on the plant from April to June to inhibit early fruit set; retain the inflorescences that open from July to September as the main fruiting flowering period; S2. Integrated water and fertilizer management: Control nitrogen fertilizer application during the fruit enlargement period and increase potassium and phosphorus fertilizer application; apply water stress treatment during the fruit coloring period to control soil moisture content at 50%-60%; after entering the extended shelf life, keep the soil moist through irrigation to maintain soil moisture content at 60%-70%; S3. Tree nutrition and hormone balance: After flowering and during the physiological fruit drop period, spray plant growth regulators and trace elements on the leaves; and before harvest, keep the tree leaves intact, do not prune fallen leaves, and spray foliar fertilizer to maintain leaf photosynthesis. S4. Facility and environmental control: Build rain shelters before the fruit ripens; take insulation measures when the ambient temperature drops below 5℃, so that the fruit can remain on the tree until January or February of the following year for harvesting; S5. Pest and disease control and tree vigor optimization: Maintain tree ventilation and light penetration through pruning, remove diseased leaves and fruits, and spray fungicides and insecticides during key periods.

2. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S1, the flower buds are removed once a week.

3. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S1, the retained inflorescences are the third batch of inflorescences that open from late July to mid-August.

4. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S2, during the fruit enlargement period, 0.3 kg of potassium sulfate is applied to each plant.

5. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S3, the plant growth regulator is selected from at least one of gibberellin (GA3) and cytokinin (BA), and its spraying concentration is 10-30 ppm; the trace elements include boron and zinc.

6. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S3, the foliar fertilizer is selected from amino acid fertilizer or seaweed fertilizer.

7. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S4, the rain shelter is to be built from late October to early November.

8. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: In step S4, the insulation measures include covering the greenhouse with film or spraying antifreeze; the critical temperature for implementing the insulation measures is when the nighttime temperature drops below 3°C.

9. The method for delayed cultivation of crisp honey kumquats according to claim 1, characterized in that: The pests and diseases controlled in step S5 include anthracnose, spider mites, and sooty mold.

10. The method for delayed cultivation of crisp honey kumquats according to any one of claims 1 to 9, characterized in that: The method achieves a soluble solids content of ≥22% in fruits harvested at a later time.

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