Preservation method of cut bougainvillea speetabilis after harvesting

Abstract

The invention relates to a postharvest preservation method of bougainvillea speetabilis cut flowers. The vase life of the bougainvillea speetabilis cut flowers is prolonged through treatments such as branch cutting, pre-cooling, specific preservative combination and packaging. The method is easy to implement and convenient to operate, can effectively solve the problem of inflorescence falling of the bougainvillea speetabilis cut flowers in the storage, transportation and bottle insertion processes, prolongs the bottle insertion period to 8-10 days, and is suitable for standardized and large-scale application.

Description

Technical Field

[0001] The invention relates to the technical field of cut flower preservation, and in particular to a post-harvest preservation method for bougainvillea cut flowers. Background Art

[0002] Bougainvillea is a woody, vine-like shrub of the genus Bougainvillea in the family Mirabilis. Its stems are typically covered with curved thorns and densely covered with hairs. The flowers are small, yellow-green, clustered in groups of three within three bracts. The outer bracts are large and beautiful, and can come in bright red, orange, purple, or creamy white. They are often mistaken for petals, and because of their leaf-like shape, they are often called bougainvillea.

[0003] Bougainvillea boasts robust growth, uniquely shaped flowers, and vibrant, colorful blossoms, making them particularly vibrant and eye-catching when in bloom. Especially in winter, when the vibrant crimson and purple bracts open, they radiate a vibrant and vibrant spectacle, earning them a popular choice for garden landscaping in southern my country. However, Bougainvillea prefers warm, humid, and sunny environments and is not cold-tolerant. While it can be grown outdoors in southern China over the winter, it requires potted plants or greenhouses elsewhere. These limitations in adaptability have significantly hampered its promotion in northern China. In recent years, some gardening enthusiasts have discovered that its flowering stems can be used as cut flowers in vases or landscapes, offering a unique and attractive appearance and promising market prospects. However, without special care, the flowering stems have a very short vase shelf life, and the inflorescences are prone to falling off, withering and falling in just two to three days, losing their ornamental value and making them difficult to store and transport. This significantly hinders the development and large-scale production of Bougainvillea cut flowers.

[0004] Currently, there are a variety of preservatives that can extend the shelf life of cut flowers by improving nutrient supply, regulating hormones, and inhibiting microbial growth. However, the optimal preservative formulas for different flower species vary significantly. Studies have found that the main reason for the short vase life of bougainvillea branches is that the branches dehydrate rapidly after being harvested, especially when the ambient temperature is high, causing the branches to wilt quickly. Furthermore, bougainvillea is an ethylene-sensitive flower, prone to flower drop during transportation and storage. Its branches are relatively spread out, and the inflorescences of some varieties are attached to the entire branch. Friction between branches during transportation can easily cause branch breakage or exacerbate flower drop. Current research on bougainvillea focuses primarily on seedling propagation and potted flower production techniques, with less research on post-harvest processing and preservation techniques for bougainvillea branches. The patent publication number is CN118786987A, and the name is "A preservative, its preparation method and a preservation method for bougainvillea cut flowers". It proposes a method for preparing a bougainvillea cut flower preservative solution using extracts of Melaleuca alternifolia and Lantana camara, coconut endosperm nutrients and a growth promoter solution. The method uses a specific preservative solution to extend the vase period of bougainvillea cut flowers, but it is mainly suitable for the vase period of bougainvillea cut flowers, and the process of preparing the preservative solution is also relatively cumbersome. In addition, it does not provide a complete set of standardized processes for post-harvest processing of bougainvillea cut flowers, and there are certain limitations when it is applied in large-scale flower production.

[0005] In order to overcome the above problems, the present application provides a method for preserving bougainvillea cut flowers after harvest. This method is simple to operate and easy to implement, and can effectively solve problems such as inflorescence falling and flower branch damage during transportation, storage and vase placement of bougainvillea, significantly extend the vase placement life, and provide a standardized method for post-harvest preservation of bougainvillea cut flowers. Summary of the Invention

[0006] In order to overcome the problems existing in the background technology, the present application provides a method for preserving bougainvillea cut flowers after harvest. By screening, the optimal pretreatment liquid and preservative liquid formula, as well as the corresponding pre-cooling and packaging solutions, are obtained, and a set of systematic post-harvest treatment measures for bougainvillea cut flowers are proposed, which can effectively solve the problems of inflorescence falling and flower branch damage of bougainvillea during transportation, storage and vase placement, and significantly extend the vase life.

[0007] To achieve the above object, the present invention provides a method for preserving cut bougainvillea flowers after harvest, the specific steps comprising: (1) Harvesting flower branches: Select flower branches, trim them and wrap them; (2) Post-harvest treatment: After wrapping, the flower branches are quickly placed in a pretreatment solution. The 10 cm above the cut of the flower branches must be immersed in the pretreatment solution. The pretreatment solution includes water, Huazhishou Ultra 100 and Huazhishou Flower Awakening 100. The ratio of Huazhishou Ultra 100 and Huazhishou Flower Awakening 100 to water is 0.75 ml / L and 5 ml / L respectively. (3) Precooling: After the flower branches are placed in the pretreatment solution, they are immediately transferred to a cold storage and treated at 4-6°C for 10-24 hours; (4) Transport packaging: After the pre-cooling treatment, the flower branches are graded and individually packaged. The bottom of each flower branch is inserted into a flower water-retaining tube filled with a preservative solution. The preservative solution includes water and flower cube preservative solution. The ratio of flower cube preservative solution to water is 10 ml / L. (5) Vase preservation: Take out the flower branches from the flower water-retaining tube and insert them into a vase filled with the preservative solution described in step (4) at room temperature.

[0008] Further preferably, in step (1), the flower branch has 50%-80% of the bracts starting to show color and open, the florets are not yet open, and the inflorescence will not fall off when shaken.

[0009] Further preferably, in step (1), the pruning method is to prune the flowering branches with pruning shears between 7:00-10:00 in the morning or 16:00-18:00 in the evening when the temperature is 15-25°C, and the length of the pruned branches is 50-90 cm to avoid deformation due to squeezing of the incision.

[0010] Further preferably, in step (1), the wrapping method is to remove excess leaves on the flower branches, retain 3-5 leaves below the top of the flower branches, and wrap the flower branches in batches with flower wrapping cloth, with 20-30 flowers per batch.

[0011] Further preferably, in step (4), the grading method is as follows: flower branches with a length of 80-90 cm are classified as grade A, flower branches with a length of 70-80 cm are classified as grade B, flower branches with a length of 60-70 cm are classified as grade C, and flower branches with a length of 50-60 cm are classified as grade D.

[0012] Further preferably, in step (4), the size of the flower water-retaining tube is 10.9 cm*2.2 cm, and the opening diameter of the top cover is 6 mm.

[0013] Further preferably, in step (4), the amount of the preservative liquid added is 3 / 4 of the total volume of the flower water-retaining tube.

[0014] Further preferably, in step (5), the total amount of the preservative liquid added is 1 / 2 of the total volume of the vase.

[0015] Further preferably, in steps (2) and (4), the water is clean tap water or purified water.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0017] Beneficial effects of the present invention: 1. The present application provides a method for preserving Bougainvillea cut flowers after harvesting. The method is simple to operate and easy to implement, and can effectively solve the problems of inflorescence falling and flower branch damage during transportation, storage and vase insertion of Bougainvillea. This is because strict regulations have been made on each link such as flower branch harvesting, post-harvest treatment, pre-cooling, transportation packaging and vase insertion preservation. Selecting suitable flower branches is conducive to ensuring the ornamental value and lifespan of the cut flowers, and post-harvest treatment and pre-cooling are conducive to reducing respiration and thus extending the shelf life of the cut flowers. At the same time, Bougainvillea flower branches need a continuous water supply after harvesting. Long-term dehydration and transportation can easily cause cavitation of the flower branches, affecting subsequent water absorption. Therefore, a continuous water supply can be guaranteed during long-distance transportation by using a fresh flower water-retaining tube and a preservative. Finally, the use of a preservative during vase insertion can ensure the vase insertion life of the cut flowers.

[0018] 2. This application significantly extends the vase life of Bougainvillea by selecting a specific pretreatment liquid and preservative liquid formula, as well as a matching pre-cooling solution. This is because Huazhishou Ultra 100 contains a highly effective ethylene antagonist that can effectively inhibit the production of ethylene in fresh cut Bougainvillea flowers after harvest, and Huazhishou Flower-awakening 100 can inhibit the production of harmful pathogens in the incisions and ducts of flower branches, helping the flower branches to maintain normal water absorption. In addition, pre-cooling can quickly remove field heat, placing fresh cut flowers in a low-temperature environment, reducing physiological activities such as respiratory rate, reducing the consumption of nutrients, and delaying the aging process of fresh cut flowers, helping to maintain the color, shape and quality of the flowers. At the same time, it slows down the rate of water evaporation, maintains the water balance of the flowers, and extends their shelf life.

[0019] 3. This application has achieved a good balance between the ornamental value and life extension of cut flowers by making strict regulations on the selection, pruning, transportation and packaging of cut flower branches. This application has made strict restrictions on the selected flower branches. This is because the proportion of bract color development on cut flower branches is too low, which will affect the ornamental value, and the proportion of bract color development is too high, which will make the flowers more likely to fall off. In addition, choosing to harvest flower branches in the morning or evening when the temperature is low can avoid the aggravation of flower falling due to excessive plant respiratory entropy. At the same time, when the temperature is low, the transpiration rate of leaves is low, which can avoid serious cavitation of flower branches due to rapid dehydration, and is more conducive to maintaining normal water absorption during later vase insertion, thereby extending the shelf life. In addition, this application can make the positions of flower branches relatively fixed by wrapping the flower branches in batches with special flower wrapping cloth, thereby effectively reducing the damage and flower falling caused by the friction between flower branches during transportation, laying the foundation for extending the life of Bougainvillea cut flowers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the result of 7 days of vase placement of Bougainvillea 'Angus' in this application; Figure 2 This is the result of 5 days of vase placement of Bougainvillea 'Kayata' in this application; Figure 3This is the result of the Bougainvillea 'Kayata' vase placement for 2 days; Figure 4 This is the result of 5 days of vase placement of Bougainvillea 'Orange Sambac' in this application; Figure 5 This application shows the effect of Bougainvillea 'Watermelon' in a vase after 5 days. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below to facilitate understanding by technicians.

[0022] The embodiment of the present invention provides a post-harvest preservation method for bougainvillea cut flowers, which can effectively solve the problems of inflorescence falling and flower branch damage during transportation, storage and vase placement of bougainvillea, and significantly extend the vase placement life, providing a complete set of standardized post-harvest preservation processing methods for bougainvillea cut flowers.

[0023] Unless otherwise specified, all reagents and materials used in the following examples were purchased from the market.

[0024] Example 1: (A method for preserving cut bougainvillea flowers after harvest) (1) Harvesting flower branches: At 9 a.m., select bougainvillea branches with about 70% of the bracts beginning to show color and open, the florets not yet opened, and the inflorescences not falling off when shaken. Select 10 branches of each of the 10 varieties of bougainvillea, including Angus, Kayata, President Purple, Watermelon, Snow White, Green Leaf Cherry, Japanese Silk, Spotted Milk Tea, Green Leaf Orange, and Pedro (the above 10 varieties of bougainvillea are available to the public from the Institute of Flowers and Plants, Yunnan Academy of Agricultural Sciences). Use pruning shears to trim the flowering branches to a length of 50-90 cm after pruning. Avoid squeezing and deformation of the incisions. Remove the excess leaves on the flower branches, leaving 5 leaves below the top of the flower branches. Wrap the flower branches in batches with flower wrapping cloth, with 25 flowers in each batch. (2) Post-harvest treatment: After wrapping, the flower branches are quickly placed in the pretreatment solution. The 10 cm above the cut of the flower branches must be immersed in the pretreatment solution. The pretreatment solution includes water, Huazhishou Ultra 100 and Huazhishou Flower Awakening 100 (both purchased from Huazhishou Flower Preservative Service Center). The ratio of Huazhishou Ultra 100 to clean purified water in the pretreatment solution is 0.75 ml / L, and the ratio of Huazhishou Flower Awakening 100 to clean purified water is 5 ml / L. (3) Precooling: After the flower branches are placed in the pretreatment solution, they are immediately transferred to a cold storage and treated at 4-6°C for 10 h; (4) Transport and packaging: The flower branches that have completed the pre-cooling treatment are first graded. Flower branches with a length of 80-90 cm are grade A, 70-80 cm are grade B, 60-70 cm are grade C, and 50-60 cm are grade D. After grading, each flower branch is individually wrapped with cellophane. The bottom of each flower branch is inserted into a flower water-retaining tube filled with preservative liquid. The preservative liquid includes water and flower cube preservative liquid. The ratio of flower cube preservative liquid (purchased from Huazhishou Flower Preservative Service Center) to clean purified water in the preservative liquid is 10 ml / L. The size of the flower water-retaining tube is 10.9 cm*2.2 cm, and the opening diameter of its top cover is 6 mm. The amount of preservative liquid added is 3 / 4 of the total volume of the flower water-retaining tube; (5) Vase preservation: Remove the flower branches from the flower water storage tube and place them in a vase filled with the preservative solution described in step (4) at room temperature. The total amount of preservative solution added should be 1 / 2 of the total volume of the vase. The average vase life of various varieties of Bougainvillea is shown in Table 1.

[0025] Comparative Example 1: The difference from Example 1 is that in step (2), the 10 varieties of bougainvillea branches were wrapped and then quickly placed in clean water, that is, the pretreatment liquid was replaced with clean tap water. The rest of the operation was the same as in Example 1. The average vase life of each variety was measured and is shown in Table 1.

[0026] Comparative Example 2: The difference from Example 1 is that in step (5), when the 10 varieties of Bougainvillea branches were vase-inserted, the preservative liquid was replaced with clean tap water. The remaining operations were the same as in Example 1. The average vase life of each variety was measured and is shown in Table 1.

[0027] Table 1 Preservation effects of 10 Bougainvillea varieties under different preservative combinations Note: Average life extension rate relative to the comparative example = (average vase life of Example 1 - average vase life of comparative example X) ÷ average vase life of comparative example X * 100%.

[0028] Data Analysis: According to the data in Table 1, the vase life of the 10 bougainvillea varieties treated in Example 1 all reached their maximum value, extending to 8-10 days. In contrast, the maximum vase life of the bougainvillea treated in Comparative Example 1 was 6 days, and the maximum vase life of the bougainvillea treated in Comparative Example 2 was 7 days, both significantly lower than that of Example 1. Furthermore, compared with Comparative Example 1, the average lifespan extension rate in Example 1 was 117.07%, and compared with Comparative Example 2, the average lifespan extension rate was 64.81%, demonstrating that the technical solution of the present invention is significantly effective in preserving bougainvillea cut flowers.

[0029] The function of the pretreatment liquid used in this application is mainly to inhibit the reproduction of pathogens in the incisions and ducts of the flower branches, thereby ensuring normal water absorption by the flower branches, while also inhibiting ethylene production and reducing flower drop. After replacing the pretreatment liquid with water in Comparative Example 1, the antibacterial and ethylene synthesis inhibitory effects were lost, resulting in a significant reduction in the vase life of the Bougainvillea flowers compared to Comparative Example 1. The preservative liquid mainly provides nutrients for the continued opening of the flowers. After replacing the preservative liquid with water in Comparative Example 2, due to the low content of various nutrients in the clear water, it was unable to provide the corresponding nutrients for the continued opening of the Bougainvillea flowers, resulting in a significant reduction in the vase life compared to Example 1.

[0030] The above data indicate that the synergistic effect of the pretreatment solution and the preservative solution can ensure that the bougainvillea branches have the water and nutrient supply required for normal flowering for a longer period of time, thereby extending their shelf life.

[0031] Comparative Example 3: The difference from Example 1 is that the pre-cooling in step (3) was changed to placing the vase at room temperature for 10 h. The rest of the operation was the same as in Example 1. The average vase life of each variety was measured and shown in Table 2.

[0032] Comparative Example 4: The difference from Example 1 is that the pre-cooling in step (3) was changed to a cold storage at 4-6°C for 4 h. The rest of the operation was the same as in Example 1. The average vase life of each variety was measured and shown in Table 2.

[0033] Table 2 Preservation effects of 10 bougainvillea varieties under different temperature treatments Note: Average life extension rate relative to the comparative example = (average vase life of Example 1 - average vase life of comparative example X) ÷ average vase life of comparative example X * 100%.

[0034] Data Analysis: According to the data in Table 2, the vase life of the 10 bougainvillea varieties treated in Example 1 all reached their maximum value, extending to 8-10 days. However, the maximum vase life of the bougainvillea treated in Comparative Example 3 was 5 days, and the maximum vase life of the bougainvillea treated in Comparative Example 4 was 6 days, both significantly lower than that of Example 1. Furthermore, compared with Comparative Example 3, Example 1 had an average lifespan extension of 147.22%, and compared with Comparative Example 4, the average lifespan extension was 106.98%, demonstrating that the technical solution of the present invention is significantly effective in preserving bougainvillea cut flowers.

[0035] After harvest, bougainvillea branches retain significant amounts of field heat (heat generated in the greenhouse environment) and respiratory heat (heat released by accelerated respiration after harvest). This heat accumulation accelerates water evaporation, plant aging, and nutrient depletion, hindering the preservation of flower color, morphology, and quality. It also promotes ethylene release, exacerbating flower drop. In Comparative Example 3, lack of precooling resulted in premature flower opening and wilting, exacerbating dehydration and flower drop, and shortening the vase shelf life. In Comparative Example 4, insufficient precooling time prevented complete elimination of field and respiratory heat.

[0036] At present, the pre-cooling time of herbaceous flowers such as lisianthus and chrysanthemum on the market only takes 1 to 2 hours, while woody flowers such as roses and hydrangeas usually need to be pre-cooled for 4 hours. However, the data of Comparative Example 4 shows that Bougainvillea requires a longer pre-cooling time, and the reference value provided by the existing pre-cooling time of woody flowers is not sufficient. According to the research of this application, although Bougainvillea is a woody flower, its flower branches have a high degree of lignification, and the more developed xylem can play a certain insulation effect. If the pre-cooling time is too short, the temperature inside the flower branches cannot be lowered to the appropriate level, resulting in the plant's own metabolic activity remaining vigorous. However, if the pre-cooling time is too long, the petals and leaves of Bougainvillea may be frostbitten, affecting its ornamental value, because Bougainvillea is native to Brazil and other places in South America. It is a subtropical plant and is not cold-resistant. The suitable growth temperature is 20 to 30°C. However, a longer low-temperature treatment time is required to ensure that the effective ingredients of the pretreatment liquid (especially fungicides and ethylene inhibitors) can fully penetrate and act on the wood tissue, and also have more sufficient and deeper action time, so that their effects can be maximized and "fixed" in the flower branch tissue, thereby reserving energy and resistance for the subsequent separation from the pretreatment liquid and entering the vase insertion period, laying a solid foundation for extending the shelf life of cut flowers.

[0037] In summary, the pre-cooling treatment setting in this application is set to 4-6℃ for 10-24 hours, which is the most reasonable for Bougainvillea. The flower branches are placed in the optimized chemical environment (sterilization, ethylene inhibition, and absorption promotion) provided by the "pre-treatment liquid" and are in a state of extremely slow physiological activity (low temperature), which can provide a sufficient time window for the effective ingredients in the pre-treatment liquid to act.

[0038] Comparative Example 5: Unlike Example 1, the 10 varieties of Bougainvillea were harvested, wrapped, and quickly placed in clean tap water before being immediately placed in a cold storage (4-6°C) for 10 hours. After pre-cooling, the branches were vase-cured at room temperature using clean tap water as the preservative. The average vase life of each variety is shown in Table 3.

[0039] Comparative Example 6: Unlike Example 1, the 10 varieties of Bougainvillea were harvested, wrapped, and quickly placed in clean tap water at room temperature for 10 hours. The branches were then vase-cured at room temperature using clean tap water as the preservative. The average vase life of each variety is shown in Table 3.

[0040] Table 3 Preservation effects of 10 Bougainvillea varieties under different preservative combinations Data Analysis: According to the data in Table 3, the vase life of the 10 bougainvillea varieties treated in Example 1 all reached their maximum value, extending to 8-10 days. However, the maximum vase life of the bougainvillea treated in Comparative Example 5 was 5 days, and the maximum vase life of the bougainvillea treated in Comparative Example 6 was 2 days, both significantly lower than that of Example 1. Furthermore, compared with Comparative Example 5, Example 1 had an average lifespan extension of 206.90%, and compared with Comparative Example 6, the average lifespan extension was 584.62%, demonstrating that the technical solution of the present invention is significantly effective in preserving bougainvillea cut flowers.

[0041] Ensuring normal water absorption and inhibiting ethylene release are key factors in determining the shelf life of bougainvillea flowers. A strong absorption-promoting treatment (Hua Zhi Shou Xing Hua 100) can address this issue, while a potent ethylene inhibitor (Hua Zhi Shou Ultra 100) and sustained environmental suppression (low temperature) can effectively inhibit ethylene release. In Comparative Example 6, replacing the pretreatment solution with water without pre-cooling lost its antibacterial and ethylene synthesis-inhibiting effects. Consequently, the plants rapidly dehydrated and aged, ultimately leading to a sharp reduction in the vase life of the bougainvillea flowers. The preservative solution primarily provides nutrients for the continued blooming of the flowers. However, in Comparative Examples 5 and 6, replacing the preservative solution with water resulted in a lack of nutrients to maintain the blooming of the bougainvillea flowers due to the low levels of various nutrients in the clear water. This significantly reduced the vase life of the bougainvillea flowers compared to Example 1. These data demonstrate that the coordinated use of pretreatment solution, pre-cooling, and vase preservative solution can maximize the water and nutrient supply required for the flowers to maintain normal flowering, thereby extending the shelf life of bougainvillea cut flowers.

[0042] Comparative Example 7: The difference from Example 1 is that both the pretreatment solution and the preservation solution used were Kelixian HVB preservation solution (2 ml / L), and the rest of the operation was the same as Example 1. The average vase life of each variety was measured and is shown in Table 4.

[0043] Comparative Example 8: The difference from Example 1 is that both the pretreatment solution and the preservation solution used were Flower Cube Preservative Solution (10 ml / L), and the rest of the operation was the same as in Example 1. The average vase life of each variety was measured and is shown in Table 4.

[0044] Comparative Example 9: The difference from Example 1 is that the preservative solution used was Huazhishou Express concentrated no-cut 200 fresh flower nutrient solution (5 ml / L). The rest of the operation was the same as Example 1. The average vase life of each variety is shown in Table 4.

[0045] Comparative Example 10: The difference from Example 1 is that only Huazhishou Ultra 100 (0.75 ml / L) was used as the pretreatment solution, and the remaining operations were the same as in Example 1. The average vase life of each variety is shown in Table 4.

[0046] Comparative Example 11: The difference from Example 1 is that only Huazhishou Xinghua 100 (5 ml / L) was used as the pretreatment solution, and the rest of the operation was the same as Example 1. The average vase life of each variety is shown in Table 4.

[0047] Table 4 Preservation effects of 10 bougainvillea varieties under different common preservatives Data Analysis: The data in Table 4 show that the vase life of the 10 bougainvillea flower branches treated in Example 1 all reached their maximum value, extending to 8-10 days. In contrast, the maximum vase life of the bougainvillea flower branches treated in Comparative Examples 7, 10, and 11 was 7 days, and the maximum vase life of the bougainvillea flower branches treated in Comparative Examples 8 and 9 was 8 days. While all preservative solution combinations were able to extend the shelf life of the bougainvillea flower branches to a certain extent compared to pure water, the average vase life was lower than that of Example 1, with the effect being only 50-70% of that of Example 1. This demonstrates that the present invention is the optimal solution for preserving bougainvillea cut flowers.

[0048] Currently, there are no preservatives specifically developed for bougainvillea on the market. The aforementioned preservatives are primarily developed for mainstream cut flowers like roses. While the formulas and effectiveness of preservatives from different companies may vary slightly, no single product can meet the preservation needs of bougainvillea cut flowers. Bougainvillea is a woody cut flower, and its xylem is more susceptible to blockage than herbaceous cut flowers. Initial water absorption difficulties are the primary factor affecting its shelf life, making water absorption promotion and sterilization steps particularly critical. Huazhishou Awakening Flower 100 is a general-purpose preservative that primarily inhibits the growth of harmful pathogens in the cut and ductal structures of flower branches, maintaining ductal patency and promoting water absorption. Bougainvillea is also sensitive to ethylene, and excessive ethylene release can exacerbate flower (bract) shedding. Huazhishou Ultra 100 is an enhanced preservative specifically for woody flowers. It contains a highly effective ethylene antagonist that inhibits ethylene production in fresh bougainvillea cut flowers after harvest, effectively slowing flower aging. In addition, Bougainvillea is a fertilizer-loving plant, so it has a high demand for nutrients during the vase period. Flower Cube Preservative Liquid can provide sufficient nutrient supply for the flower branches, as well as continuous water balance and antibacterial environment, to maintain the normal physiological state of the cut flowers.

[0049] The three preservative solutions have slightly different effects. According to the research findings of this application, the combined use of the three can achieve functional complementarity and more comprehensively solve the bottleneck problems faced by Bougainvillea branches after harvest, such as difficulty in water absorption, ethylene sensitivity and nutrient deficiency, thereby effectively extending the shelf life of the cut flowers.

[0050] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for preserving bougainvillea cut flowers after harvest, characterized in that: The post-harvest preservation method comprises the following steps: (1) Harvesting flower branches: Select flower branches, trim them and wrap them; (2) Post-harvest treatment: After wrapping, the flower branches are quickly placed in a pretreatment solution. The 10 cm above the cut of the flower branches must be immersed in the pretreatment solution. The pretreatment solution includes water, Huazhishou Ultra 100 and Huazhishou Flower Awakening 100. The ratio of Huazhishou Ultra 100 and Huazhishou Flower Awakening 100 to water is 0.75 ml / L and 5 ml / L respectively. (3) Precooling: After the flower branches are placed in the pretreatment solution, they are immediately transferred to a cold storage and treated at 4-6°C for 10-24 hours; (4) Transport packaging: After the pre-cooling treatment, the flower branches are graded and individually packaged. The bottom of each flower branch is inserted into a flower water-retaining tube filled with a preservative solution. The preservative solution includes water and flower cube preservative solution. The ratio of flower cube preservative solution to water is 10 ml / L. (5) Vase preservation: Take out the flower branches from the flower water-retaining tube and insert them into a vase filled with the preservative solution described in step (4) at room temperature.

2. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (1), the flower branch has 50%-80% of its bracts beginning to show color and open, while the florets have not yet opened, and the inflorescence will not fall off when shaken.

3. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (1), the pruning method is to prune the flowering branches with pruning shears between 7:00-10:00 in the morning or 16:00-18:00 in the evening when the temperature is 15-25°C. The length of the pruned branches is 50-90 cm to avoid deformation due to squeezing of the incision.

4. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (1), the wrapping method is to remove excess leaves on the flower branches, retain 3-5 leaves below the top of the flower branches, and wrap the flower branches in batches with flower wrapping cloth, with 20-30 flowers in each batch.

5. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (4), the grading method is as follows: flower branch length of 80-90 cm is grade A, flower branch length of 70-80 cm is grade B, flower branch length of 60-70 cm is grade C, and flower branch length of 50-60 cm is grade D.

6. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (4), the size of the flower water-retaining tube is 10.9 cm*2.2 cm, and the opening diameter of the top cover is 6 mm.

7. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (4), the amount of the preservative liquid added is 3 / 4 of the total volume of the flower water-retaining tube.

8. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In step (5), the total amount of the preservative liquid added is 1 / 2 of the total volume of the vase.

9. A method for preserving bougainvillea cut flowers after harvest according to claim 1, characterized in that, In steps (2) and (4), the water is clean tap water or purified water.

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