Method for storing astragalus sinicus seed composite gas

Abstract

The invention relates to the technical field of agricultural seed storage, in particular to an astragalus sinicus seed composite gas storage method. The astragalus sinicus seeds are stored under composite gas; the composite gas is oxygen, carbon dioxide and inert gas; the volume ratio of the oxygen to the carbon dioxide to the inert gas is (1-3): (3-5): (92-96). According to the method, the storage environment is optimized through the matching of the composite gas, and bacteriostasis, insect inhibition and seed activity maintenance are taken into consideration. By adopting the method provided by the invention, after the astragalus sinicus seeds are stored for 24 months, the germination rate is 88%.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural seed storage, in particular to a method for composite gas storage of Astragalus sinicus seeds. BACKGROUND

[0002] Astragalus sinicus is an important legume green manure crop with nitrogen fixation ability, which can improve soil fertility and increase crop yield, and is also an important nectar source plant. The research status of Astragalus sinicus breeding and cultivation, field return and comprehensive utilization, in the aspects of breeding and cultivation technology, the application of excellent varieties and Astragalus sinicus coated seeds, rhizobium agents, and the technology of using small fertilizer to raise large fertilizer are introduced. In the aspect of field return utilization, Astragalus sinicus as green manure not only can improve soil fertility and increase crop yield, but also can fix nitrogen, save energy, reduce nitrogen loss, promote soil organic carbon accumulation and reduce CO2 emission. In the aspect of comprehensive utilization, the utilization of Astragalus sinicus as selenium-rich products, nectar sources, hay and vegetables is introduced. In view of the current situation of continuous decline of Astragalus sinicus planting area, the method of combining new breeding means with excellent variety propagation is proposed to solve the problems of old, degenerative and mixed varieties of Astragalus sinicus, and to vigorously promote the demonstration and popularization of Astragalus sinicus, and fully play the role of Astragalus sinicus green manure in the sustainable development of agriculture.

[0003] In agricultural production, the storage quality of Astragalus sinicus seeds is very important, however, Astragalus sinicus seeds are easily affected by respiration, mold growth and insect damage during long-term storage, resulting in a decrease in germination rate. Traditional storage methods rely on low temperature or chemical fumigation, but low temperature storage technology requires high energy consumption refrigeration equipment and strict requirements for storage facilities, which is difficult to popularize and apply in normal temperature or resource scarce areas, and long-term low temperature may cause condensation of water in the seeds, which may aggravate the risk of mold. Chemical fumigation method uses chemical agents such as aluminum phosphide to kill insects and mold, but the residues of the agents may cause irreversible damage to the activity of the seeds, and there is a risk of environmental pollution and health risk to the operators, which does not meet the trend of green agricultural development. The existing low oxygen storage technology mainly uses single gas (such as pure nitrogen), but the effect of respiration inhibition is limited, and the metabolism of the seeds may be abnormal due to anaerobic environment. Therefore, it is urgent to develop a normal temperature storage method suitable for Astragalus sinicus seeds, which can realize the multiple goals of long-term maintenance of seed activity, mold and insect control and energy saving by optimizing the composition of low oxygen composite gas and dynamic control technology without low temperature or chemical agents. SUMMARY

[0004] In order to solve the above problems, the present application provides a method for composite gas storage of Astragalus sinicus seeds, which optimizes the storage environment by composite gas composition, and considers the inhibition of bacteria and insects and the maintenance of seed activity.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a method for storing milkvetch seeds in a composite gas atmosphere, wherein milkvetch seeds are stored in a composite gas atmosphere.

[0007] The composite gas is oxygen, carbon dioxide, and an inert gas;

[0008] The volume ratio of oxygen to carbon dioxide and inert gas is 1-3:3-5:92-96.

[0009] Preferably, the inert gas includes nitrogen.

[0010] Preferably, the storage temperature is 15–30°C.

[0011] Preferably, the humidity of the storage environment is 45-55%.

[0012] Preferably, the moisture content of the milkvetch seeds is below 10%, and they are surface-sterilized by ultraviolet light or ozone.

[0013] Principle of ambient temperature low oxygen complex gas storage technology:

[0014] The principle of ambient temperature low-oxygen composite gas storage technology is mainly based on precisely controlling the oxygen concentration in the storage environment to inhibit the growth of harmful microorganisms or extend the shelf life of goods. This technology usually combines the replacement or extraction of the original oxygen with an inert gas (such as nitrogen), thereby reducing the oxygen concentration to an extremely low level and maintaining this state using a sealed structure and intelligent equipment.

[0015] Specifically, the core of this technology lies in:

[0016] (1) Gas replacement and control: The oxygen concentration is reduced to a suitable level by removing oxygen from the storage space and injecting inert gas.

[0017] (2) Sealing and stability: The airtight enclosure structure and intelligent detection equipment are adopted to ensure the long-term stability of oxygen concentration.

[0018] (3) Normal temperature operation: No low temperature conditions are required, saving energy costs, and it is suitable for long-term preservation of a variety of items.

[0019] (4) This technology is widely used in the low-oxygen storage of seeds, grains, etc., which can effectively extend the shelf life and inhibit the growth of microorganisms such as mold.

[0020] This invention addresses the problems of high energy consumption, residual pollution, and damage to seed viability caused by existing milkvetch seed storage technologies that rely on low temperatures, chemical agents, or single gases. This invention provides a room-temperature, low-oxygen composite gas storage method that, by dynamically controlling the mixing ratio of oxygen (O2), carbon dioxide (CO2), and nitrogen (N2), inhibits seed respiration, microbial reproduction, and pest infestation, thereby achieving long-term safe storage of milkvetch seeds.

[0021] The beneficial effects of this invention are:

[0022] This invention optimizes the storage environment through a compound gas ratio, balancing antibacterial and insecticidal effects with seed viability preservation. Using the method provided by this invention, the germination rate of milkvetch seeds reached 88% after 24 months of storage. Detailed Implementation

[0023] This invention provides a method for storing milkvetch seeds in a composite gas atmosphere, wherein the milkvetch seeds are stored in a composite gas atmosphere; the composite gas is oxygen, carbon dioxide and an inert gas; the volume ratio of oxygen to carbon dioxide and inert gas is 1-3:3-5:92-96.

[0024] In this invention, trace amounts of oxygen prevent anaerobic metabolic damage to milk vetch seeds, carbon dioxide inhibits the development of mold and insect eggs, and nitrogen maintains a low-oxygen environment. In this invention, the inert gas preferably includes nitrogen.

[0025] In this invention, the storage temperature is preferably 15–30°C. The ambient humidity during storage is preferably 45–55%. The moisture content of the milkvetch seeds is preferably below 10%, and they are disinfected by ultraviolet light or ozone surface sterilization. This invention does not specifically limit the methods of ultraviolet light and ozone surface sterilization; those skilled in the art can follow conventional methods.

[0026] To further illustrate the present invention, the following detailed description is provided in conjunction with embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0027] Example 1

[0028] A method for storing Astragalus membranaceus seeds in a composite gas, comprising the following steps:

[0029] 1 kg of purple clover seeds that have been surface-sterilized with ultraviolet light and have a moisture content of 9% are placed into a sealed chamber (volume 5L), and filled with a mixed gas of O2 1-3%, CO2 3-5%, and N2 92-96% (by volume). The temperature is set at 25℃ and the humidity at 50%RH.

[0030] After 12 months of storage, the germination rate of milkvetch seeds was tested, and the result was: the germination rate of milkvetch seeds was 91%.

[0031] After 24 months of storage, the germination rate of milkvetch seeds was tested, and the result was 88%.

[0032] Comparative Example 1

[0033] Milk clover seeds should be stored in a low-temperature cabinet (temperature 4℃, humidity 50%RH);

[0034] After 12 months of storage, the germination rate was 88%.

[0035] After 24 months of storage, the germination rate is 85%.

[0036] Comparative Example 2

[0037] Store milkvetch seeds at room temperature naturally;

[0038] After 12 months of storage, the germination rate is 75%.

[0039] After 24 months of storage, the germination rate is 65%.

[0040] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for storing Astragalus membranaceus seeds in a composite gas, characterized in that, The seeds of milkvetch were stored under a composite gas atmosphere; The composite gas is oxygen, carbon dioxide, and an inert gas; The volume ratio of oxygen to carbon dioxide and inert gas is 1-3:3-5:92-96.

2. The method according to claim 1, characterized in that, The inert gas includes nitrogen.

3. The method according to claim 1, characterized in that, The storage temperature is 15–30°C.

4. The method according to claim 1, characterized in that, The storage environment has a humidity level of 45-55%.

5. The method according to claim 1, characterized in that, The moisture content of the milkvetch seeds is below 10%, and they are surface-sterilized by ultraviolet light or ozone.