Method for preparing fresh flower and cut flower fresh-keeping liquid from waste pomelo peel

Abstract

The invention discloses a method for preparing fresh flower and cut flower fresh-keeping liquid from waste shaddock peel, which comprises the following steps: shaddock peel essential oil is extracted from waste shaddock peel to prepare the fresh-keeping liquid for fresh flower and cut flower fresh-keeping, the fresh-keeping liquid comprises shaddock peel essential oil and sterilized distilled water, the mass ratio of the shaddock peel essential oil to the sterilized distilled water is 1: 1000-1: 5000, and the shaddock peel essential oil and the sterilized distilled water are added into the shaddock peel essential oil to the sterilized distilled water; bacteria breeding in the flower cutting process is reduced, the service life and the ornamental time of the flowers are prolonged, the ornamental quality of the flowers is improved, and recycling of the waste shaddock peel is also achieved.

Description

Technical field:

[0001] The invention relates to the technical field of fresh-keeping of fresh flowers, and in particular to a method for preparing fresh-keeping liquid for cut flowers by utilizing discarded pomelo peels. Background technology:

[0002] The method of flower preservation is to use various physical and chemical means to extend the flowering life of flowers and meet people's needs for beautifying life. Chemical preservatives are widely used in the preservation of cut flowers. Their main components are sugars, nitrogen sources, fungicides, metal ions, growth regulators, organic acids, ethylene inhibitors and antagonists, etc. By adding preservatives, fungicides and antioxidants, the life and preservation effect of cut flowers can be extended. However, most chemical agents are not conducive to environmental protection and have high costs. Therefore, it is of great significance to study new preservatives.

[0003] The pomelo peel is relatively thick, accounting for about 30% of the fresh weight of fresh pomelo, and can be divided into the outer peel, the middle peel and the inner peel. The main components of the pomelo peel include cellulose, hemicellulose, soluble sugars, lipids and bioactive substances (mainly flavonoids), and the pomelo peel also contains essential oils. However, in the process of pomelo consumption, the pomelo peel is often discarded as an inedible part, which on the one hand causes environmental pollution and on the other hand causes waste of resources. Therefore, it is of great significance to explore the potential value of pomelo peel. Summary of the invention:

[0004] The invention aims to provide a method for preparing fresh cut flower preservative liquid by utilizing discarded pomelo peels.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for preparing fresh-cut flower preservative liquid by using discarded pomelo peels comprises the following steps: extracting pomelo peel essential oil from discarded pomelo peels and using the oil to prepare fresh-cut flower preservative liquid.

[0007] Preferably, the preservative solution comprises grapefruit peel essential oil and sterilized distilled water, and the mass ratio of grapefruit peel essential oil to sterilized distilled water is 1:1000-1:5000, preferably 1:1000-1:1500, and most preferably 1:1000.

[0008] The waste grapefruit peel is used to extract grapefruit peel essential oil by steam distillation, and the specific steps are as follows: crush the grapefruit peel, add water and NaCl, the NaCl mass content is 5% to 10%, ultrasonically treat at 20 to 100 kHz for 10 to 60 minutes to obtain grapefruit peel pretreatment liquid, and then heat reflux extraction for 0.5 to 1 hour to obtain grapefruit peel essential oil.

[0009] Preferably, the fresh flowers are roses, retaining 30 cm branches and 2-3 compound leaves.

[0010] The invention protects the use of the preservative liquid obtained by the above method in fresh-keeping of fresh flowers, comprising the following steps: selecting full fresh flowers with relatively uniform opening degree, obliquely cutting the base of the flower branches, retaining 30 cm of the flower branches and 2-3 compound leaves, and immersing them in a bottle filled with the preservative liquid.

[0011] Preferably, the fresh flowers are Chinese roses, which are kept fresh in a bottle containing a preservative solution for 7 days.

[0012] The invention has the following beneficial effects: the invention uses discarded pomelo peel to extract pomelo peel essential oil, which is used as a fresh-keeping liquid for rose cut flowers, thereby reducing bacterial growth during the flower cutting process, extending the life and viewing time of the flowers, improving their viewing quality, and also realizing the reuse of discarded pomelo peel. Description of the drawings:

[0013] Figure 1 The effect of different grapefruit peel essential oil concentrations on the vase life of fresh-cut roses;

[0014] Figure 2 is the abundance of bacteria in the flower-cut liquid after treatment with grapefruit peel essential oil;

[0015] Among them, CK is the distilled water control, 1 / 500, 1 / 1000 and 1 / 5000 refer to the preservative solutions prepared by mixing grapefruit peel essential oil and sterilized distilled water in a mass ratio of 1:500, 1:1000 and 1:5000, respectively. Specific implementation method:

[0016] The following is a further description of the present invention, rather than a limitation of the present invention.

[0017] Embodiment 1:

[0018] The grapefruit peel essential oil was extracted from the discarded grapefruit peel by steam distillation. The specific steps were as follows: the grapefruit peel was crushed, water and NaCl were added, the NaCl mass content was 5%, ultrasonic treatment was performed at 80kHz for 30min to obtain the grapefruit peel pretreatment solution, and then heating and refluxing extraction was performed for 1h to obtain the grapefruit peel essential oil.

[0019] The distilled water was sterilized at high temperature and high pressure, and then a preservative solution was prepared with a mass ratio of grapefruit peel essential oil to sterilized distilled water of 1:500, 1:1000 and 1:5000 as the cut flower preservative solution of rose, and the control was distilled water.

[0020] Select plump rose buds with relatively uniform opening degree, cut the base of the branch obliquely, retain 30 cm of the branch and 2-3 compound leaves, and soak them in conical bottles filled with preservative solution containing essential oil (1:500, 1:1000 and 1:5000) and distilled water, and calculate its vase life.

[0021] After 5 days of flower arrangement, 500 μL of the flower arrangement liquid with different treatments was extracted and placed in LB medium for culture at 37°C, 200 rpm, for 16 h, and the OD600 value was measured.

[0022] Figure 1 The effects of different treatments on the lifespan of cut roses are shown. When grapefruit essential oil reaches 1 / 1000, it can significantly increase the vase lifespan of fresh cut roses. It can also significantly inhibit the growth of bacteria in the vase solution ( Figure 2 ).

[0023] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing fresh cut flower preservative liquid using discarded pomelo peels, characterized in that: The method comprises the following steps: The grapefruit peel essential oil is extracted from discarded grapefruit peel and used to prepare a fresh-keeping liquid for preserving cut flowers.

2. The method according to claim 1, characterized in that The preservative liquid contains grapefruit peel essential oil and sterilized distilled water, and the mass ratio of the grapefruit peel essential oil to the sterilized distilled water is 1:1000-1:5000.

3. The method according to claim 2, characterized in that The mass ratio of grapefruit peel essential oil to sterilized distilled water is 1:1000-1:1500.

4. The method according to claim 2, characterized in that: The mass ratio of grapefruit peel essential oil and sterilized distilled water is 1:1000.

5. The method according to claim 1, characterized in that The method of extracting grapefruit peel essential oil from discarded grapefruit peel is carried out by steam distillation. The specific steps are as follows: crush the grapefruit peel, add water and NaCl, the mass content of NaCl is 5% to 10%, ultrasonically treat at 20 to 100 kHz for 10 to 60 minutes to obtain a grapefruit peel pretreatment liquid, and then heat and reflux to extract for 0.5 to 1 hour to obtain the grapefruit peel essential oil.

6. The method according to claim 1, characterized in that The fresh flowers are Chinese roses, with 30 cm branches and 2-3 compound leaves retained.

7. Application of the fresh-keeping liquid obtained by the method according to claim 1 in fresh-keeping of fresh flowers, characterized in that: The following steps are involved: Select flowers that are full and relatively uniform in degree of openness, cut the base of the branch obliquely, retain 30 cm of the branch and 2-3 compound leaves, and soak them in a bottle filled with preservative solution.

8. The use according to claim 7, characterized in that: The fresh flowers are Chinese roses, which can be kept fresh for 7 days in a bottle filled with preservative liquid.

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