Method for producing eurotium cristatum loose tea based on Pu'er tea raw material

Abstract

The invention relates to a method for producing eurotium cristatum loose tea based on a Pu'er tea raw material, and belongs to the technical field of tea fermentation production and preparation. The method comprises the following steps: (1) preparing a golden flower seed solution; (2) material tidewater inoculation; (3) controlling oxygen, inhibiting bacteria and growing flowers; and (4) drying, flower control and shaping. The method for producing the eurotium cristatum loose tea based on the Pu'er tea raw material is suitable for all Pu'er tea, and the eurotium cristatum Pu'er loose tea with full and flourishing eurotium cristatum can be produced by taking the Pu'er raw tea, the Pu'er ripe tea, the Pu'er black tea or the Pu'er white tea as the raw material. In addition, raw Pu'er tea, ripe Pu'er tea, black Pu'er tea or white Pu'er tea can be directly used as raw materials for culturing the eurotium cristatum, and matching of stems and leaves is not needed. In the culture process, a nitrogen replacement mode is adopted, and the oxygen content in the fermentation environment is accurately controlled, so that the'live tea 'characteristic of the Pu'er tea can be guaranteed, the micro-aerobic characteristic and the antibacterial characteristic of the eurotium cristatum are utilized, the prepared eurotium cristatum Pu'er loose tea is purer, and the eurotium cristatum Pu'er loose tea can be made into pressed tea forms such as cakes, blocks and bricks through pressing.

Description

Technical Field

[0001] The invention relates to a method for producing golden flower loose tea based on Pu'er tea raw material, and belongs to the technical field of tea fermentation production and preparation. Background Art

[0002] Golden Flower, also known as Eurotium cristatum, is commonly found in dark tea bricks. The mycelium, which differentiates into brightly colored, golden-yellow granules, gives it the name Golden Flower. The fungus itself and its metabolites have metabolic and health-promoting properties, with literature reporting benefits such as improved digestion, lowering blood lipids, and dissolving fat. Therefore, it is considered a probiotic in tea. The activity of the Golden Flower fungus, particularly its well-developed enzyme system, promotes the breakdown of macromolecular organic matter and the oxidation of polyphenols in tea leaves. This results in a tea brewed with Golden Flower tea possessing a translucent golden color, a soft, aromatic aroma, and the characteristic aroma of Golden Flower.

[0003] Golden flowers have long been considered a type of dark tea that can only be produced under specific temperature and humidity conditions, within a space created by the tea stems and leaves with just the right amount of tension. This process, called "flowering," allows the visible, golden-flower-like hymenopsicles to grow, a process rarely seen in other teas. Furthermore, the current method of producing compressed tea leaves is common, and most golden flowers grow internally, making their development undetectable until after fermentation is complete.

[0004] Yunnan Pu'er tea is a tea variety produced from large-leaf tea trees. Due to its longevity and the presence of numerous ancient, arbor-like tea trees, it has long been considered a premium tea ingredient. While Yunnan's large-leaf tea processing technology continues to evolve, the types of tea currently processed remain limited to Pu'er (raw and cooked), black tea, and green tea. This leads to a significant oversupply, and the development of new varieties has remained largely uninnovative for years.

[0005] Therefore, developing a processing technology to produce golden flower Pu'er tea from Pu'er tea raw materials has positive implications for industry advancement. Furthermore, traditional golden flower-producing black teas typically use a compressed tea material to allow for the flower to bloom. This requires waiting until the fermentation is complete and the tea is opened before the flower's growth can be observed. Given the high cost of Pu'er tea raw materials, a new technology is needed to enable a more monitorable and controllable flower blooming process. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the present invention provides a method for producing golden flower loose tea based on Pu'er tea raw material.

[0007] The technical solutions of the present invention are as follows: A method for producing golden flower loose tea based on Pu'er tea raw material is to use Pu'er tea as raw material and ferment it with Eurotium cristatum in the form of loose tea, which specifically includes the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 25-35°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:(0.5-1.5) and soak for 55-65 minutes to obtain golden flower seed solution; (2) Material inoculation: Add the golden flower seed liquid prepared in step (1) to the cooled boiling water treated in the same manner as in (1) at a ratio of 25-28% of the raw material amount, stir evenly, and then add it to the Pu'er tea raw material for inoculation. (3) Oxygen control and antibacterial flowering: the inoculated Pu'er tea obtained in step (2) is evenly spread in a fermentation box, and cultured in a closed flowering room at a temperature of 26-28°C, a humidity of 70-85%, and an oxygen content of 1-5% for 6-8 days. When more than 95% of the surface of the inoculated Pu'er tea is covered with hyphae of Eurotium cristatum, a loose Pu'er tea material after flowering is obtained; (4) Drying, flower control and shaping: After the loose Pu'er tea material with raw flowers is formed in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process. After 36 to 48 hours, mature loose Pu'er tea with golden flowers is obtained.

[0008] Preferably, according to the present invention, in step (1), the mass ratio of water to the solid strain of Eurotium cristatum is 500:1, and the soaking time is 60 min.

[0009] Preferably, according to the present invention, in step (2), the Pu'er tea raw material is Pu'er raw tea, Pu'er cooked tea, Pu'er black tea or Pu'er white tea, and the tea material is in bulk form.

[0010] Preferably, according to the present invention, in step (2), the mass ratio of the Pu'er tea raw material to the golden flower seed liquid is 10000: (0.5~1.5).

[0011] Further preferably, the mass ratio of the Pu'er tea raw material to the golden flower seed liquid is 10000:1.

[0012] Preferably, according to the present invention, in step (2), after the tidal water treatment, the moisture content of the inoculated Pu'er tea is 25-28%.

[0013] Preferably, in step (3), the size of the fermentation box is 25 cm × 20 cm × 7 cm, and the specific volume is 0.8-1 kg of inoculated Pu'er tea per fermentation box to ensure that all parts of the material are under similar control conditions during the fermentation process, thereby avoiding the uneven metabolic heat and aerobic respiration caused by the compaction of the material during the growth and metabolism of the Aspergillus cristatus, which affects the uniformity of the flower and the difference in the accumulation of metabolites.

[0014] Preferably, according to the present invention, in step (3), the oxygen content in the environment is controlled by injecting nitrogen during the culture process, specifically: the oxygen content is controlled to 0.5-1.5% in the first 0-2 days, the oxygen content is controlled to 2-3% in the middle 3-5 days, and the oxygen content is controlled to 4-5% in the late 6-8 days.

[0015] More preferably, during the cultivation process, the oxygen content is controlled to 1% during the first 0-2 days, 2% during the middle 3-5 days, and 5% during the last 6-8 days. The oxygen content is controlled by replacing the oxygen in the flower growing environment with nitrogen.

[0016] Preferably, in step (4), the culture time is 48 hours; the step temperature increase refers to: uniformly increasing the temperature to 35°C in the early stage of 0-16 hours, uniformly increasing the temperature to 40°C in the middle stage of 17-32 hours, and uniformly increasing the temperature to 45°C in the late stage of 33-48 hours.

[0017] Preferably, according to the present invention, in step (4), the Jinhua Pu'er loose tea can be pressed into cakes, tuosos, bricks and other compressed tea forms and then sold, or it can be directly sold as loose tea.

[0018] A golden flower Pu'er loose tea is prepared by the method for producing golden flower loose tea based on Pu'er tea raw material.

[0019] Beneficial effects: 1. The method provided herein for producing loose golden flower tea from Pu'er tea is applicable to all Pu'er teas. It can produce loose golden flower Pu'er tea with plump and lush golden flowers, using raw Pu'er tea, cooked Pu'er tea, black Pu'er tea, or white Pu'er tea as raw materials. Furthermore, using loose Pu'er tea as raw material, mycelial growth is clearly visible, enabling the monitoring and control of the flower development process.

[0020] 2. The present invention can directly utilize Pu'er raw tea, Pu'er cooked tea, Pu'er black tea, or Pu'er white tea as raw materials for the cultivation of Eurotium cristatum. It does not require the use of stems and leaves. The product is in the form of loose tea, and there is no need for pressing as in the previous production of Camellia chrysantha. The flowering is more uniform and the flowering effect is easier to observe. Furthermore, the raw materials do not need to be subjected to high-temperature treatment, and the original active substances of Pu'er tea are not destroyed, thus maintaining the biochemical transformation mechanism during the aging process of Pu'er tea.

[0021] 3. During the cultivation process of golden flower, the present invention still maintains the non-high temperature treatment mode of Pu'er tea raw tea process, and adopts nitrogen replacement method to accurately control the oxygen content in the fermentation environment. This can not only ensure the "live tea" characteristics of Pu'er tea, but also utilize the microaerobic characteristics and antibacterial properties of Aspergillus niger to effectively inhibit the growth of other fungal microorganisms, further highlight the growth advantage of Aspergillus niger, and the obtained golden flower Pu'er loose tea is purer.

[0022] 4. The Jinhua Pu'er loose tea produced by this invention features uniform mycelial growth on the surface of each tea leaf, with coverage reaching approximately 95%, essentially achieving complete growth. Fermentation takes only 6-8 days, significantly faster than the one-month required for traditional dark tea fermentation techniques. The product is also easier to process and can be made into loose or compressed tea. The Jinhua particles are distinct, the aroma is rich, and the tea soup is golden and translucent, with a mellow and smooth flavor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a physical picture of the Jinhua Pu'er loose tea produced in Example 1.

[0024] Figure 2 This is an enlarged picture of the Jinhua Pu'er loose tea produced in Example 1.

[0025] Figure 3 This is a real picture of the Jinhua Pu'er compressed tea prepared in Comparative Example 1. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are described below. It should be pointed out that the described embodiments are part of the present invention, and all other embodiments obtained by other technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0027] Unless otherwise specified, the raw materials, reagents, or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0028] The method for separating and purifying the solid bacterial strain of Eurotium cristatum in the embodiment is as follows: Weigh Fu brick tea, add sterile water, shake and culture, filter with 2 layers of sterile gauze, wash the tea residue with distilled water, filter to obtain the extract, absorb the extract and apply it to PDA solid culture medium. When the cristatum cristatum grows, purify it using PDA solid culture medium using the plate streaking method to obtain a single colony of the cristatum cristatum, and then transfer it to a new PDA solid culture medium again to obtain a solid strain of the cristatum cristatum.

[0029] Example 1 A method for producing golden flower loose tea based on Pu'er tea raw material comprises the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 25-35°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:1 and soak for 55-65 minutes to obtain golden flower seed solution; (2) Inoculation of materials with tidal water: Select clean, non-polluted and deteriorated Pu'er raw tea materials that have been screened, add the golden flower seed liquid prepared in step (1) to the Pu'er raw tea at a mass ratio of 10,000:1, stir evenly, and then perform tidal water treatment with sterile water that has been previously boiled and sterilized to obtain inoculated Pu'er raw tea with a water content of 28%; (3) Oxygen-controlled antibacterial flowering: the inoculated Pu'er raw tea obtained in step (2) is evenly spread in a fermentation box, which is placed on a special fermentation rack. The tea is cultured in a closed flowering room at a temperature of 27°C and a humidity of 80% for 6 to 8 days. When more than 95% of the surface of the inoculated Pu'er raw tea is covered with hyphae of Eurotium cristatum, the fermented Pu'er raw tea is obtained; During the cultivation process, the oxygen content in the greenhouse is controlled by nitrogen replacement, specifically: the oxygen content is controlled at 1% in the first 0-2 days, 2% in the middle 3-5 days, and 5% in the last 6-8 days; (4) Drying, flower control and shaping: After forming the Pu'er raw tea after the fungus in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process to make the golden flower particles further plump and shaped. After 48 hours, the tea is taken out of the box and broken up to obtain the golden flower Pu'er raw tea; Among them, step-by-step heating means: uniformly raising the temperature to 35°C in the first 0~16 hours, uniformly raising the temperature to 40°C in the middle 17~32 hours, and uniformly raising the temperature to 45°C in the last 33~48 hours.

[0030] The Jinhua Pu'er raw tea produced in this embodiment is loose tea and can be sold directly. The specific physical picture is as follows: Figure 1 、 2 shown.

[0031] It can also be pressed into cakes, tuo, bricks and other compressed tea forms and sold.

[0032] Example 2 A method for producing golden flower loose tea based on Pu'er tea raw material comprises the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 30°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:1 and soak for 60 minutes to obtain golden flower seed solution; Alternatively, the Jinhua Pu'er raw tea produced in Example 1 was added to water at a mass ratio of 100:1 and soaked for 60 minutes to obtain Jinhua seed liquid; (2) Material inoculation: Select clean, non-polluted and deteriorated Pu'er cooked tea material that has been screened, add the golden flower seed liquid prepared in step (1) to the Pu'er cooked tea at a mass ratio of 10,000:1, stir evenly, and then perform inoculation with sterile water that has been previously boiled and sterilized to obtain inoculated Pu'er cooked tea with a water content of 25%; (3) Oxygen control and antibacterial flowering: the inoculated Pu'er ripe tea obtained in step (2) is evenly spread in a fermentation box, which is placed on a special spawning rack. In a closed spawning room, the temperature is 27°C and the humidity is 80%, and the tea is cultured for 6 to 8 days. When more than 95% of the surface of the inoculated Pu'er ripe tea is covered with Eurotium cristatum hyphae, the spawned Pu'er ripe tea is obtained. During the cultivation process, the oxygen content in the greenhouse is controlled by nitrogen replacement, specifically: the oxygen content is controlled at 1% in the first 0-2 days, 2% in the middle 3-5 days, and 5% in the last 6-8 days; (4) Drying, flower control and shaping: After forming the Pu'er cooked tea after the incubation in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process to make the golden flower particles further plump and shaped. After 48 hours, the tea is taken out of the room, unboxed and broken up to obtain the golden flower Pu'er cooked tea. Among them, step-by-step heating means: uniformly raising the temperature to 35°C in the first 0~16 hours, uniformly raising the temperature to 40°C in the middle 17~32 hours, and uniformly raising the temperature to 45°C in the last 33~48 hours.

[0033] The Jinhua Pu'er cooked tea produced in this embodiment is loose tea and can be sold directly. It can also be pressed into cakes, Tuo, bricks and other compressed tea forms and sold later.

[0034] Example 3 A method for producing golden flower loose tea based on Pu'er tea raw material comprises the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 30°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:1 and soak for 60 minutes to obtain golden flower seed solution; Alternatively, the Jinhua Pu'er raw tea produced in Example 1 was added to water at a mass ratio of 100:1 and soaked for 60 minutes to obtain Jinhua seed liquid; (2) Material inoculation: Select clean, non-polluted and deteriorated Pu'er black tea material that has been screened, add the golden flower seed liquid prepared in step (1) to the Pu'er black tea at a mass ratio of 10,000:1, stir evenly, and then perform inoculation with sterile water that has been previously boiled and sterilized to obtain inoculated Pu'er black tea with a water content of 26%; (3) Oxygen control and antibacterial flowering: the inoculated Pu'er black tea obtained in step (2) is evenly spread in a fermentation box, which is placed on a special fermentation rack. The tea is cultured in a closed flowering room at a temperature of 27°C and a humidity of 80% for 6 to 8 days. When more than 95% of the surface of the inoculated Pu'er black tea is covered with hyphae of Eurotium cristatum, the fermented Pu'er black tea is obtained; During the cultivation process, the oxygen content in the greenhouse is controlled by nitrogen replacement, specifically: the oxygen content is controlled at 1.5% in the first 0-2 days, 2.5% in the middle 3-5 days, and 4.5% in the last 6-8 days; (4) Drying, flower control and shaping: After forming the Pu'er black tea after the incubation in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process to make the golden flower particles more plump and shaped. After 48 hours, the tea is taken out of the box and broken up to obtain the golden flower Pu'er black tea. Among them, step-by-step heating means: uniformly raising the temperature to 35°C in the first 0~16 hours, uniformly raising the temperature to 40°C in the middle 17~32 hours, and uniformly raising the temperature to 45°C in the last 33~48 hours.

[0035] The Jinhua Pu'er black tea produced in this embodiment is loose tea and can be sold directly. It can also be pressed into cakes, Tuo, bricks and other compressed tea forms and sold later.

[0036] Example 4 A method for producing golden flower loose tea based on Pu'er tea raw material comprises the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 30°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:1 and soak for 60 minutes to obtain golden flower seed solution; Alternatively, the Jinhua Pu'er raw tea produced in Example 1 was added to water at a mass ratio of 100:1 and soaked for 60 minutes to obtain Jinhua seed liquid; (2) Material inoculation: Select clean, non-polluted and deteriorated Pu'er white tea material that has been screened, add the golden flower seed liquid prepared in step (1) to the Pu'er white tea at a mass ratio of 10,000:1, stir evenly, and then perform inoculation with sterile water that has been previously boiled and sterilized to obtain inoculated Pu'er white tea with a water content of 27%; (3) Oxygen control and antibacterial flowering: the inoculated Pu'er white tea obtained in step (2) is evenly spread in a fermentation box, which is placed on a special spawning rack. In a closed spawning room, the temperature is 27°C and the humidity is 80%, and the tea is cultured for 6 to 8 days. When more than 95% of the surface of the inoculated Pu'er tea is covered with hyphae of Eurotium cristatum, the spawned Pu'er white tea is obtained. During the cultivation process, the oxygen content in the greenhouse is controlled by nitrogen replacement, specifically: the oxygen content is controlled at 1% in the first 0-2 days, 2% in the middle 3-5 days, and 5% in the last 6-8 days; (4) Drying, flower control and shaping: After forming the Pu'er white tea after the fungus in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process to make the golden flower particles further plump and shaped. After 48 hours, the tea is taken out of the box and broken up to obtain the golden flower Pu'er white tea. During the cultivation process, the oxygen content in the greenhouse is controlled by nitrogen replacement, specifically: the oxygen content is controlled at 1% in the first 0-2 days, 2.5% in the middle 3-5 days, and 5% in the last 6-8 days; The Jinhua Pu'er white tea produced in this embodiment is loose tea and can be sold directly. It can also be pressed into cakes, Tuo, bricks and other compressed tea forms and sold later.

[0037] Comparative Example 1 A traditional preparation method of Jinhua Pu'er compressed tea comprises the following steps: (1) Using Yunnan large-leaf tea varieties processed according to traditional Pu'er tea production technology to obtain grade 6 or above sun-dried green tea as raw tea base material; (2) Use water at 30℃ that meets the drinking water hygiene standards to adjust the moisture content of the raw tea to 10%; (3) Place the tea leaves with adjusted moisture content in a heated autoclave, heat to 80°C and steam for 10 minutes; (4) Take 0.2% by weight of the dry tea leaves of Eurotium cristatum and dissolve it in pure water to obtain a Eurotium cristatum solution; then evenly spray the Eurotium cristatum solution on the steamed tea leaves.

[0038] (5) After the tea leaves are inoculated with the fungus, they are fermented in piles at a temperature of 70°C for 2 hours. (6) Move the tea leaves that have been piled up to the flowering room, ensuring that the water content of the tea leaves is 15%, the temperature in the flowering room is 28°C, and the humidity is 60%. Observe the flowering process at any time and adjust the humidity or add water according to the flowering situation. The flowering process is completed after 6 days. (7) The qualified Jinhua Pu'er tea is screened and pressed, and then moved to a ventilated, dry, and odor-free warehouse for natural drying to obtain Jinhua Pu'er compressed tea.

[0039] The actual picture of the Jinhua Pu'er compressed tea prepared in this comparative example is as follows Figure 3 shown.

[0040] By comparison Figures 1-3It can be found that compared with the Jinhua Pu'er compressed tea of ​​Comparative Example 1, the Jinhua Pu'er produced by the present invention has a more uniform and bright color, and the quality and quantity of the crown-processed Eurotium in the tea leaves are significantly improved. This is because the present invention does not need to be pressed as in the production of the Jinhua Pu'er compressed tea of ​​Comparative Example 1, the flowering is more uniform, the flowering effect is also easier to observe, and the flowering process can be monitored and controlled. In addition, the raw materials do not need to be fermented at high temperature, the original active substances of Pu'er tea are not destroyed, and the biochemical transformation mechanism of Pu'er tea during aging is maintained. At the same time, the present invention accurately controls the oxygen content in the fermentation environment, which can not only ensure the "live tea" characteristics of Pu'er tea, but also utilize the microaerobic characteristics and antibacterial properties of the crown-processed Eurotium to effectively inhibit the growth of other fungal microorganisms, further highlight the growth advantage of the crown-processed Eurotium, and the obtained Jinhua Pu'er loose tea is purer.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing golden flower loose tea based on Pu'er tea raw material, characterized in that: Pu'er tea is used as raw material, and fermentation with Eurotium cristatum is carried out in the form of loose tea, specifically including the following steps: (1) Preparation of golden flower seed solution: boil water and cool it to 25-35°C, then add solid fungus of Eurotium cristatum to the water at a mass ratio of 500:(0.5-1.5) and soak for 55-65 minutes to obtain golden flower seed solution; (2) Material inoculation: Add the golden flower seed liquid prepared in step (1) to the cooled boiling water treated in the same manner as in (1) at a ratio of 25-28% of the raw material amount, stir evenly, and then add it to the Pu'er tea raw material for inoculation. (3) Oxygen control and antibacterial flowering: the inoculated Pu'er tea obtained in step (2) is evenly spread in a fermentation box, and cultured in a closed flowering room at a temperature of 26-28°C, a humidity of 70-85%, and an oxygen content of 1-5% for 6-8 days. When more than 95% of the surface of the inoculated Pu'er tea is covered with hyphae of Eurotium cristatum, a loose Pu'er tea material after flowering is obtained; (4) Drying, flower control and shaping: After the loose Pu'er tea material with raw flowers is formed in step (3), the temperature is raised in steps of 35°C, 40°C and 45°C. Fresh air is introduced regularly during the heating process. After 36 to 48 hours, mature loose Pu'er tea with golden flowers is obtained.

2. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (1), the mass ratio of water to the solid culture of Eurotium cristatum is 500:1, and the soaking time is 60 minutes.

3. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (2), the Pu'er tea raw material is Pu'er raw tea, Pu'er cooked tea, Pu'er black tea or Pu'er white tea, and the tea material is in bulk form.

4. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (2), the mass ratio of the Pu'er tea raw material to the golden flower seed liquid is 10000: (0.5-1.5); Further preferably, the mass ratio of the Pu'er tea raw material to the golden flower seed liquid is 10000:

1.

5. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (2), after the tidal water treatment, the moisture content of the inoculated Pu'er tea is 25-28%.

6. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (3), the size of the fermentation box is 25 cm × 20 cm × 7 cm, and the specific volume is 0.8-1 kg of inoculated Pu'er tea in each fermentation box to ensure that all parts of the material are under similar control conditions during the fermentation process, so as to avoid the uneven metabolic heat and aerobic respiration caused by the compaction of the material during the growth and metabolism of the cristatum, which affects the uniformity of the flower and the difference in the accumulation of metabolites.

7. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (3), the oxygen content in the environment is controlled by injecting nitrogen during the culture process, specifically: the oxygen content is controlled to 0.5-1.5% in the first 0-2 days, the oxygen content is controlled to 2-3% in the middle 3-5 days, and the oxygen content is controlled to 4-5% in the late 6-8 days; More preferably, the oxygen content is controlled at 1% in the first 0-2 days, 2% in the middle 3-5 days, and 5% in the last 6-8 days.

8. The method for producing golden flower loose tea based on Pu'er tea raw material according to claim 1, characterized in that: In step (4), the culture time is 48 hours; the step temperature increase means: uniformly increasing the temperature to 35°C in the early stage of 0 to 16 hours, uniformly increasing the temperature to 40°C in the middle stage of 17 to 32 hours, and uniformly increasing the temperature to 45°C in the late stage of 33 to 48 hours.

9. A golden flower Pu'er loose tea, characterized in that The tea is prepared according to the method for producing golden flower loose tea based on Pu'er tea raw materials as described in any one of claims 1 to 9.

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