Selenium-rich earthworm breeding method

Abstract

The invention discloses a selenium-rich earthworm breeding method which comprises the following steps: S1, earthworm bed laying feed treatment: adopting dry and wet separated cow dung as the only raw material, and adjusting the pH value of the cow dung to 7.5 or below through a water washing and pile turning process, S2, supplementary feed treatment: adopting dry and wet separated cow dung as supplementary feed, carrying out short-term stack retting fermentation for 3-5 days, keeping the humidity to be 60-80%, stabilizing the pH value to be 6.0-7.0, and carrying out fermentation for 3-5 days to obtain the selenium-rich earthworm. The method comprises the steps of S1, laying a bed with feed, putting earthworm seedlings, uniformly spraying a sodium selenite solution on the surface of a culture bed, and putting the earthworm seedlings, S2, supplementing the feed and performing culture management, and S5, harvesting and utilizing byproducts, including earthworm harvesting and earthworm cast utilization, the earthworm harvesting adopts a mesh screen and an illumination driving method, adult earthworms are collected after a surface matrix is stripped, and the adult earthworms are used as selenium-enriched feed or health-care product raw materials. According to the method, by spraying the sodium selenite solution, the content of selenium in the earthworms is remarkable, the produced earthworms and wormcast are rich in selenium, and the nutritive value is higher.

Description

Technical Field

[0001] The invention relates to the technical field of earthworm breeding methods, in particular to a selenium-enriched earthworm breeding method. Background Art

[0002] Earthworms, also known as earthworms, have a wide range of applications, including fishing, traditional Chinese medicine, and animal husbandry. Currently, there are many methods for earthworm farming, and the key lies in the preparation of earthworm feed. The most common method is to farm earthworms using livestock and poultry manure, such as pig and cow manure, or using crop straw and livestock and poultry manure. However, there are also many problems: composting livestock and poultry manure is a labor-intensive process, especially for large-scale farms, where composting is time-consuming and labor-intensive, affecting farming efficiency. Different livestock and poultry manures vary greatly, and choosing too few can lead to malnutrition and failure of earthworm growth. Furthermore, the produced earthworms have low nutritional value. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the existing selenium-enriched earthworm breeding method, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a selenium-enriched earthworm breeding method. The method comprises the following steps: S1: laying earthworm bed feed processing, adopting dry-wet separation of cow dung as the only raw material, adjusting the pH value of the cow dung to below 7.5 by water flushing and turning processes, S2: feeding feed processing, S3: laying feed bed and placing earthworm seedlings, uniformly spraying sodium selenite solution on the surface of the breeding bed, placing earthworm seedlings, S4: feeding and breeding management, S5: harvesting and by-product utilization, including earthworm harvesting and earthworm castings utilization. The earthworms are harvested by mesh screening and light driving method, and the surface matrix is peeled off and the earthworms are collected and used as selenium-enriched feed or health product raw materials. The method enables the selenium content in the earthworms to be significantly increased by spraying sodium selenite solution, so that the produced earthworms and earthworm castings are both selenium-enriched and have higher nutritional value.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A method for cultivating selenium-enriched earthworms, comprising:

[0008] S1 earthworm bed feed treatment uses dry and wet separated cow dung as the only raw material, and adjusts the pH value of cow dung to below 7.5 through water washing and turning process;

[0009] S2 feed treatment, the feed also uses dry and wet separated cow dung, which is fermented in a short-term composting for 3-5 days, with the humidity maintained at 60%-80% and the pH value stabilized at 6.0-7.0;

[0010] S3: Feed bedding and earthworm seedlings are placed. Sodium selenite solution is evenly sprayed on the surface of the breeding bed. The selenium concentration gradient is set to 0, 25, 50, 75, and 100 mg / kg. Atomization spraying is used to ensure that selenium is evenly distributed. Then, earthworm seedlings are placed.

[0011] S4 Feeding and Cultivation Management, including dynamic feeding and environmental control; dynamic feeding: adding a 5-10 cm thick layer of fermented cow dung every 7-10 days based on the earthworms' feeding rate; environmental control: maintaining the bed temperature at 20±2°C using a sunshade net or insulation film, and adjusting the humidity to 70% using a micro-spraying system;

[0012] S5 harvesting and by-product utilization, including earthworm harvesting and worm casting utilization, wherein the earthworms are harvested by mesh screening and light-driven driving, and the surface matrix is removed and collected to be used as selenium-rich feed or health product raw materials; the residual matrix of the worm castings is used as selenium-rich organic fertilizer with an organic matter content of ≥30%;

[0013] As a preferred embodiment of the selenium-rich earthworm breeding method described in the present invention, in said S3, in said S1, the method for processing the dry-wet separated cow dung is: spreading the dry-wet separated cow dung on the ground, flushing the surface with water every day to promote the discharge of sewage at the bottom, turning the pile evenly after each flushing and testing the pH value, and continuously processing for 7 days until it meets the standard; after the fertilizer is completed, the cow dung must be completely decomposed, without pungent odor, and the humidity is controlled at 50%-60%.

[0014] As a preferred embodiment of the selenium-enriched earthworm breeding method described in the present invention, S3 and S4 also include selenium enrichment cycle management, and the selenium enrichment cycle management is continuous breeding for 60 days, and the earthworms complete selenium accumulation through feeding and body surface absorption.

[0015] As a preferred embodiment of the selenium-rich earthworm breeding method described in the present invention, in S4 and S3, the earthworm beds are 0.4m high and 1.0m wide, with a bed spacing of 1.2 meters. The length of the beds is determined according to the breeding site.

[0016] As a preferred embodiment of the selenium-enriched earthworm breeding method of the present invention, in said S3, the stocking density of earthworm seedlings is 2.5 kg / m 2 .

[0017] Compared with the prior art, the present invention has the following beneficial effects: the method comprises the following steps: S1, laying earthworm bed feed processing, adopting dry-wet separation of cow dung as the only raw material, adjusting the pH value of the cow dung to below 7.5 through water flushing and composting processes, S2, feeding feed processing, S3, laying feed bed and placing earthworm seedlings, uniformly spraying sodium selenite solution on the surface of the breeding bed, placing earthworm seedlings, S4, feeding and breeding management, S5, harvesting and by-product utilization, including earthworm harvesting and earthworm castings utilization, wherein the earthworms are harvested by using a mesh screen and light driving method, the surface matrix is peeled off, and the earthworms are collected and used as selenium-enriched feed or health product raw materials, so that the method significantly increases the selenium content in the earthworms by spraying the sodium selenite solution, and the produced earthworms and earthworm castings are both selenium-enriched and have higher nutritional value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0019] Figure 1 This is a method diagram of a selenium-enriched earthworm breeding method of the present invention. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0022] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] The invention provides a selenium-enriched earthworm breeding method. The method comprises the following steps: S1: laying earthworm beds for feed processing, adopting dry-wet separation of cow dung as the only raw material, adjusting the pH value of the cow dung to below 7.5 through water flushing and composting processes, S2: feeding and feed processing, S3: laying feed beds and placing earthworm seedlings, uniformly spraying a sodium selenite solution on the surface of the breeding bed, placing the earthworm seedlings, S4: feeding and breeding management, and S5: harvesting and by-product utilization, including earthworm harvesting and earthworm castings utilization. The earthworms are harvested by adopting a mesh screen and light driving method, and the surface matrix is peeled off and the earthworms are collected and used as selenium-enriched feed or health product raw materials. The method enables the selenium content in the earthworms to be significantly increased by spraying the sodium selenite solution, so that the produced earthworms and earthworm castings are both selenium-enriched and have higher nutritional value.

[0024] Figure 1 The figure shows the overall structure of an embodiment of a method for cultivating selenium-rich earthworms according to the present invention. Figure 1 The main part of the method for safe utilization of lightly or moderately polluted farmland in this embodiment includes:

[0025] S1 earthworm bed feed treatment uses dry and wet separated cow dung as the only raw material, and adjusts the pH value of cow dung to below 7.5 through water washing and turning process;

[0026] S2 feed treatment, the feed also uses dry and wet separated cow dung, which is fermented in a short-term composting for 3-5 days, with the humidity maintained at 60%-80% and the pH value stabilized at 6.0-7.0;

[0027] S3 feed bedding and earthworm seedlings were placed. Sodium selenite solution was evenly sprayed on the surface of the breeding bed. The selenium concentration gradient was set to 0, 25, 50, 75, and 100 mg / kg. Atomization spraying was used to ensure that selenium was evenly distributed. Then earthworm seedlings were placed. The placement density of earthworm seedlings was 2.5 kg / m 2 ;

[0028] S4 Feeding and Culture Management, including dynamic feeding and environmental control; Dynamic feeding: Add a 5-10cm thick layer of fermented cow dung every 7-10 days based on the earthworms' feeding rate; Environmental control: Maintain the bed temperature at 20±2°C using shade nets or insulation film, and adjust the humidity to 70% using a micro-spraying system;

[0029] S5 Harvesting and by-product utilization, including earthworm harvesting and worm castings utilization. Earthworms are harvested using mesh screening and light-driven methods. After the surface matrix is stripped, the earthworms are collected and used as selenium-rich feed or health product raw materials. The residual matrix of worm castings is used as selenium-rich organic fertilizer with an organic matter content of ≥30%;

[0030] Furthermore, in S1, the treatment method of dry-wet separated cow dung is as follows: the dry-wet separated cow dung is spread flat on the ground, the surface is washed with water every day to promote the discharge of sewage at the bottom, the pile is turned evenly after each washing and the pH value is tested, and the treatment is continued for 7 days until it meets the standard; after the composting is completed, the cow dung must be completely decomposed, without pungent odor, and the humidity is controlled at 50%-60%;

[0031] Furthermore, S4 also includes selenium enrichment cycle management, which is a continuous cultivation for 60 days, during which earthworms accumulate selenium through feeding and body surface absorption;

[0032] Furthermore, in S3, the dimensions of the earthworm bed laid were 0.4 m high and 1.0 m wide, with a bed spacing of 1.2 m, and the bed length was determined according to the breeding site;

[0033] Furthermore, the temperature, humidity and pH value during the earthworm composting process are:

[0034] temperature humidity pH 10-25℃ 60％-80％ 7.45-7.56 ;

[0035] Furthermore, the concentrations of the sodium selenite solution added in the present invention are respectively:

[0036] deal with Sodium selenite concentration (mg / kg) Experimental Group 1 0 Experimental Group 2 25 Experimental Group 3 50 Experimental Group 4 75 Experimental Group 5 100 ;

[0037] Furthermore, the effects of adding different concentrations of sodium selenite on the selenium content of earthworms in the present invention are as follows:

[0038]

[0039] Furthermore, the effects of adding different concentrations of sodium selenite on the selenium content of earthworm castings in the present invention are as follows:

[0040]

[0041] Combine Figure 1, a selenium-rich earthworm breeding method of the present embodiment, the specific use process is as follows: the method is through S1 laying earthworm bed feed processing, using dry and wet separation of cow dung as the only raw material, adjusting the pH value of cow dung to below 7.5 through water washing and turning process, S2 supplementing feed processing, S3 feed bed and earthworm seedlings release, evenly spraying sodium selenite solution on the surface of the breeding bed, and releasing earthworm seedlings, S4 supplementing feed and breeding management, S5 harvesting and by-product utilization, including earthworm harvesting and earthworm castings utilization, the earthworms The harvesting adopts a mesh screening and light-driven method, and the earthworms are collected after the surface matrix is stripped, and are used as selenium-enriched feed or raw materials for health products. The method significantly increases the selenium content in the earthworms by spraying sodium selenite solution, so that the produced earthworms and earthworm castings are both selenium-enriched and have higher nutritional value. The method also simplifies the processing of earthworm feed, reducing the processing time of each batch of 20-40 tons of earthworm feed from 15-20 days to 5-8 days, and reducing the processing labor from 6-12 days to 3-5 days, thereby shortening the processing time.

[0042] Although the present invention has been described above with reference to specific embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A method for cultivating selenium-enriched earthworms, characterized in that: include: S1 earthworm bed feed treatment uses dry and wet separated cow dung as the only raw material, and adjusts the pH value of cow dung to below 7.5 through water washing and turning process; S2 feed treatment, the feed also uses dry and wet separated cow dung, which is fermented in a short-term composting for 3-5 days, with the humidity maintained at 60%-80% and the pH value stabilized at 6.0-7.0; S3: Feed bedding and earthworm seedlings are placed. Sodium selenite solution is evenly sprayed on the surface of the breeding bed. The selenium concentration gradient is set to 0, 25, 50, 75, and 100 mg / kg. Atomization spraying is used to ensure that selenium is evenly distributed. Then, earthworm seedlings are placed. S4 Feeding and Cultivation Management, including dynamic feeding and environmental control; dynamic feeding: adding a 5-10 cm thick layer of fermented cow dung every 7-10 days based on the earthworms' feeding rate; environmental control: maintaining the bed temperature at 20±2°C using a sunshade net or insulation film, and adjusting the humidity to 70% using a micro-spraying system; S5 harvesting and by-product utilization, including earthworm harvesting and earthworm castings utilization. The earthworms are harvested by mesh screening and light driving method, and the earthworms are collected after peeling off the surface matrix and used as selenium-rich feed or health care product raw materials; the residual matrix of the earthworm castings is used as selenium-rich organic fertilizer with an organic matter content of ≥30%.

2. A selenium-enriched earthworm breeding method according to claim 1, characterized in that: In S1, the method for processing the dry-wet separated cow dung is: spreading the dry-wet separated cow dung on the ground, flushing the surface with water every day to promote the discharge of sewage at the bottom, turning the pile evenly after each flushing and testing the pH value, and continuously treating for 7 days until it meets the standard; after the fertilizer is completed, the cow dung must be completely decomposed, without pungent odor, and the humidity is controlled at 50%-60%.

3. A selenium-enriched earthworm breeding method according to claim 1, characterized in that: The S4 also includes selenium enrichment cycle management, which is continuous cultivation for 60 days, and the earthworms complete selenium accumulation through feeding and body surface absorption.

4. A selenium-enriched earthworm breeding method according to claim 1, characterized in that: In said S3, the dimensions of the earthworm bed laid are 0.4m high and 1.0m wide, with a bed spacing of 1.2m. The length of the bed is determined according to the breeding site.

5. A selenium-enriched earthworm breeding method according to claim 1, characterized in that: In S3, the stocking density of earthworm seedlings is 2.5 kg / m 2 .

Images