阅读说明：本技术 一种大麦苗短时冷藏保鲜方法 (Short-time refrigeration and preservation method for barley seedlings ) 是由 封功能 邓丽娜 高月 李洪山 申玉香 郑清 于 2019-09-27 设计创作，主要内容包括：本发明涉及农产品保鲜技术领域,旨在提供一种大麦苗短时冷藏保鲜方法,其工艺流程为：采收→除杂→分装→梯度降温→紫外辐射→冷藏→梯度升温→出库。本发明所提供的大麦苗短时冷藏保鲜方法能够使新鲜大麦苗冷藏保鲜4-5天,冷藏后的大麦苗新鲜嫩绿,品质变化较小,操作简单,适合于大规模生产。(The invention relates to the technical field of agricultural product preservation, and aims to provide a short-time refrigeration preservation method for barley seedlings, which comprises the following process flows of: harvesting → removing impurities → split charging → gradient cooling → ultraviolet radiation → refrigeration → gradient heating → delivery. The short-time refrigeration and preservation method for the barley seedlings can ensure that the fresh barley seedlings are refrigerated and preserved for 4-5 days, the refrigerated barley seedlings are fresh and tender green, the quality change is small, the operation is simple, and the method is suitable for large-scale production.)

1. A short-time refrigeration fresh-keeping method for barley seedlings is carried out according to the following steps:

(1) harvesting: selecting sunny days and adopting artificial collection.

(2) Removing impurities: removing silt, rotten leaves and old leaves.

(3) Subpackaging: fresh barley seedlings are subpackaged into freshness protection bags, a sponge block is attached to the freshness protection bags, and bag openings are sealed by binding ropes.

(4) Gradient cooling: placing the barley seedlings in an environment condition of 6-9 ℃ for 3-4 hours; and then refrigerated at 0-4 ℃.

(5) Ultraviolet radiation: the barley seedling is subjected to ultraviolet radiation in the gradient cooling process at 6-9 ℃.

(6) And (3) refrigerating: refrigerating at 0-4 deg.C.

(7) Gradient temperature rise: the refrigerated barley seedlings are firstly placed for 3 to 4 hours under the environment condition of 9 to 12 ℃ and then are heated to the room temperature.

(8) And (4) ex-warehouse: transporting the barley seedlings to a production workshop.

2. The short-time refrigeration fresh-keeping method for barley seedlings according to claim 1, wherein the height of the barley seedlings is 15-35 cm, and the fresh-keeping bag is made of PE (polyethylene) and PVA (polyvinyl alcohol) water-absorbing sponge.

3. The short-term refrigeration fresh-keeping method for barley seedlings according to claim 1, wherein the refrigeration temperature used is 0-4 ℃.

4. The short-term cold storage and fresh-keeping method for barley seedlings according to claim 1, wherein the ultraviolet radiation is performed on a net rack, an ultraviolet lamp is installed above the net rack to make the barley seedlings uniformly receive the ultraviolet radiation, the ultraviolet wavelength is 254nm, and the radiation dose is 1.0-1.8KJ/m 2. The time is 25-35 min.

5. The short-term cold storage preservation method for barley seedlings according to claim 1, wherein the gradient temperature raising step is omitted when the outside ambient temperature is low.

Technical Field

The invention discloses a short-time refrigeration and preservation method for barley seedlings, and belongs to the technical field of agricultural product preservation.

Background

The young barley seedling is a young barley seedling, contains abundant essential nutrients such as vitamins, minerals, carotene, proteins and the like, and also contains bioactive components such as active enzyme, plant flavone, soluble dietary fiber, natural chlorophyll and the like. The barley green is called as the king of alkaline food by scientific circles all over the world, and is prepared by taking tender barley seedlings as a raw material and preserving various nutrients and active substances in the barley seedlings through technologies such as crushing and juicing, cell wall breaking, filtering to remove residues, ultrafiltration concentration, vacuum drying and the like. Not only has the functions of balancing nutrition, regulating the pH value of the organism and enhancing the immunity of the human body, but also has the effects of expelling toxin, beautifying, delaying senility, regulating blood sugar and the like. In order to ensure the effective components and quality, the time from harvest to processing of barley seedlings as raw materials for producing the barley green is required to be short, and the barley seedlings are generally finished within 4-5 hours. As the barley seedlings naturally grow in the field, certain requirements are imposed on the temperature and the weather during harvesting, and the day-to-day operation of a factory is difficult to guarantee. In order to ensure the normal operation of the plant, it is necessary to keep fresh barley seedlings fresh for a short time. In order to keep the quality of the plant samples after a period of preservation, people usually adopt methods such as modified atmosphere packaging, low-temperature refrigeration, humidity maintenance, surface preservative addition, radiation treatment and the like, but the cost of the vegetables or fruits stored by the method is high, the quality of barley green using barley seedlings as raw materials is affected by the preservative added on the surface, and related patents related to barley preservation are not found at present, so that the study on barley seedling preservation is necessary.

Disclosure of Invention

The invention aims to solve the technical problem of providing a short-time refrigeration and preservation method for barley seedlings. The invention takes the harvested fresh barley seedlings as main raw materials to carry out low-temperature preservation, the quality of the refrigerated barley seedlings is basically kept unchanged, and the barley seedlings are fresh and tender green and meet the raw material requirement of barley green production. The technology can ensure the normal operation of the barley green factory, promote the planting and utilization of leaf barley, and has simple method and lower cost.

The invention is realized by the following technical scheme:

a short-time refrigeration fresh-keeping method for barley seedlings is characterized in that:

(1) harvesting of barley seedlings: when the barley seedlings grow to about 15-35 cm, the barley seedlings are manually harvested in the morning on a sunny day and transported back to a factory while being harvested.

(2) Removing impurities, namely removing silt, rotten leaves and old leaves.

(3) Subpackaging: fresh barley seedlings are respectively packed in large PE (polyethylene) freshness protection bags, a piece of PVA (polyvinyl alcohol) water absorption sponge is attached to the freshness protection bags, and the bag openings are closed by binding ropes.

(4) Gradient cooling: the preservation bags are not overlapped, and the barley seedlings are firstly placed for 3-4 hours under the environment condition of 6-9 ℃; and then refrigerated at 0-4 ℃.

(5) Ultraviolet radiation: the barley seedling is placed in a gradient cooling period of 6-9 ℃ for ultraviolet radiation, the ultraviolet wavelength is 254nm, and the radiation dose is 1.0-1.8KJ/m 2. The time is 25-35 min.

(6) And (3) refrigerating: the refrigeration temperature is 0-4 ℃.

(7) Gradient temperature rise: the barley seedlings are firstly placed for 3 to 4 hours under the environment condition of 9 to 12 ℃ and then are heated to the room temperature.

(8) And (4) ex-warehouse: transporting the barley seedlings to a production workshop.

Compared with the prior art, the invention has the beneficial effects that:

the short-time refrigeration and preservation method for barley seedlings is simple to operate, low in cost and suitable for large-scale production, various nutritional ingredients contained in the refrigerated barley seedlings are less lost, the original color of the barley seedlings is well kept, the raw material requirement of barley green production is met, normal operation of an overcast barley green production enterprise is guaranteed, and PE bags and PVA absorbent sponges for preservation can be recycled.

Drawings

FIG. 1 barley status on the day of cold storage.

FIG. 2 barley state on day 5 of refrigeration.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of the invention is not limited in any way by the examples.