Method for breeding mud clams by using spartina alterniflora fermentation base fertilizer

Abstract

The application discloses a method for breeding mud clams by using rice grass fermentation base fertilizer, and relates to the technical field of mud clam breeding, and comprises the following steps: improving breeding coating, releasing seedlings, replacing water, discharging fresh water, and harvesting; through scientific breeding management and reasonable harvesting mode, sustainable breeding and development of mud clams can be realized, harmful invasive organisms rice grass can be turned into treasure, the problem of directly discharging dredged bottom mud into the sea can be solved, marine pollution can be reduced, the dredged bottom mud is mixed with the invasive organisms rice grass and EM bacteria, the surplus nutrients in the bottom mud can be reused by the anti-silt and pollution resistance of the rice grass and the EM bacteria, bottom hypoxia caused by seawater eutrophication is prevented, and better nutrient components and living environment are provided for the mud clams.

Description

Technical Field

[0001] This invention relates to the field of mud clam farming technology, and in particular to a method for farming mud clams using fermented rice straw as a base fertilizer. Background Technology

[0002] The mud clam (Cynodon dactylon) is a mollusc belonging to the family Arcidae in the order Arcidae. It is also known as the blood clam, silver clam, flower clam, and cockle. Its shell is thick and extremely inflatable, with two equal, nearly oval-shaped valves. The apex of the valve is prominent and located anterior to the center of the back. The anterior end of the valve is rounded, the posterior end is obliquely truncated, the ventral margin is arched, and the dorsal margin is straight. The radial ribs are robust, with sparse, large nodules on the ribs. The nodules on the ribs in the posterior dorsal region are low, and the intercostal grooves are the same width as the ribs. The inner margin of the shell has notches. The hinge is straight with densely packed hinge teeth. The apexes of the two valves are relatively far apart, and the ligament surface is wide and rhomboid. The shell surface is white, covered with a brown periostracum. Mud clams are widely distributed in the Indian Ocean-Western Pacific Ocean region. It is distributed along the coast of China; it prefers to inhabit the soft mudflats near the inner bays and estuaries where fresh water flows in; it is a filter feeder, and prefers to eat diatoms, organic detritus and copepods; mud clams are one of the four major farmed shellfish in China; its meat is sweet and salty, warm in nature, and enters the spleen, stomach and liver meridians, and has the effects of replenishing qi and blood, strengthening the spleen and stomach, and dispersing nodules and eliminating phlegm.

[0003] Every year in March and April, farmers use mud pumps or boat tillers to dredge the ponds where mud clams are farmed, and then discharge the dredged silt directly into the sea. This causes a lack of nutrients on the surface of the ponds, resulting in slow growth of the farmed shellfish. In addition, some farmers add organic fertilizers such as chicken manure or pig manure to the water during the farming process, but this has little effect on promoting the growth of benthic mud clams.

[0004] For example, Chinese Patent Publication No. CN114403065B discloses a method for environmentally friendly and efficient pond aquaculture of shellfish, which includes the following steps: (1) constructing a water storage pond; (2) constructing a clam pond and burying water bags and inlet / outlet pipes; (3) connecting the water bags to allow water to enter the aquaculture pond; (4) cultivating pond feed organisms; (5) raising the water level of the water storage pond to fill the water bags with water; (6) releasing shellfish seedlings; (7) regulating the rise and fall of the pond water level; (8) filtering feed on the shellfish seedlings and changing the pond water; (9) harvesting; by injecting seawater into the water bags laid in the pond depression and draining the water bags... The artificial regulation of water levels in shellfish farming ponds by releasing seawater creates a high-quality aquatic environment that promotes healthy shellfish growth. This reduces fertilizer discharge, allows for efficient utilization of feed organisms, and minimizes pollution to the surrounding environment, demonstrating significant economic, efficient, and environmental benefits. However, the long farming cycle of mud clams leads to the enrichment of organic matter in the bottom mud, increased bacterial respiration, and the depletion of oxygen in the mud, resulting in a loss of fertility. Furthermore, the discharge of the mud into the sea after use contributes to eutrophication, which is detrimental to environmental protection.

[0005] CN109997746A discloses a method for raising crabs using Spartina alterniflora (rice grass). This method utilizes nearby beaches with abundant Spartina alterniflora as breeding grounds for mud crabs, leveraging the properties of the grass to reduce feed costs and increase profits. However, the method directly uses fresh Spartina alterniflora to raise crabs. The applicant discovered that directly using Spartina alterniflora to raise mud clams does not effectively reduce the breeding costs of mud clams. Summary of the Invention

[0006] This application provides a method for raising mud clams using fermented rice straw as a base fertilizer, which solves the problem of insufficient fertility in the bottom mud of clam fields in the prior art, and achieves the effect of preventing bottom hypoxia caused by seawater eutrophication, while also providing mud clams with better nutrients and a better living environment.

[0007] This application provides a method for raising mud clams using fermented rice straw as base fertilizer, including the following steps:

[0008] S1. Improve the aquaculture mudflat: Mix 3-5 kg ​​of fermented rice straw base fertilizer per square meter of mudflat to improve the mudflat surface and obtain an improved mudflat surface;

[0009] S2. Seedling release: Release mud clam seedlings onto the improved tidal flat surface;

[0010] S3. Water exchange and freshwater removal: 10-15 days after stocking, bring in 20-30cm of seawater, and then change the water and stir the mudflats every month.

[0011] Harvest when the number of mud clams reaches 120-150 per kg.

[0012] Furthermore, in step S2, the mud clam seedlings must meet the requirement of 1000 grains / kg;

[0013] Based on the total area of ​​the tidal flats, the release rate of the mud clam seedlings is 1000-1500 per square meter.

[0014] Furthermore, in step S1, the fermented rice grass base fertilizer includes the following raw materials in parts by weight: 40-50 kg of aquaculture bottom mud, 10-20 kg of rice grass powder, and 5 L of EM bacterial solution.

[0015] Furthermore, the preparation process of the aquaculture bottom sediment is as follows: the dredged aquaculture bottom sediment is treated with 50g / m³ of bleaching powder. 3 Disinfect and expose to sunlight for two days to obtain aquaculture substrate.

[0016] The EM bacterial solution is composed of Lactobacillus plantarum, Enterococcus faecalis, and water, wherein the Lactobacillus plantarum content is ≥1×10⁻⁶. 8 CFU / mL, Enterococcus faecalis ≥3×10 7CFU / mL. Specifically, the EM bacterial solution is a mixed feed additive microbial EM kit produced by Wuxi Sanzhi Biotechnology Co., Ltd.

[0017] Furthermore, the preparation method of the fermented rice straw base fertilizer is as follows: after mixing rice straw powder and bottom mud, EM bacterial solution is added for fermentation to obtain the fermented rice straw base fertilizer.

[0018] Furthermore, the fermentation temperature is 30-45℃.

[0019] The fermentation time is 1-3 months.

[0020] Furthermore, the fermented base fertilizer of rice grass includes fermented base fertilizer of rice grass 1, fermented base fertilizer of rice grass 2, and fermented base fertilizer of rice grass 3.

[0021] The ratio of fermented rice grass base fertilizer 1 includes: 50kg of semi-dry breeding bottom mud, 10kg of rice grass powder, and 5L of EM bacterial solution;

[0022] The ratio of fermented rice grass base fertilizer 2 includes: 45kg of semi-dry breeding bottom mud, 15kg of rice grass powder, and 5L of EM bacterial solution;

[0023] The ratio of fermented rice grass base fertilizer 3 includes: 40kg of semi-dry breeding bottom mud, 20kg of rice grass powder, and 5L of EM bacterial solution.

[0024] Furthermore, the operation of mixing the fermented rice straw base fertilizer into the tidal flat surface is as follows: 100 kg of fermented rice straw base fertilizer 3 is sprinkled onto a 100 square meter tidal flat surface and leveled; then 100 kg of fermented rice straw base fertilizer 2 is sprinkled and leveled; finally, 50 kg of fermented rice straw base fertilizer 1 is sprinkled and leveled.

[0025] Furthermore, the process of mixing the fermented rice straw base fertilizer into the tidal flat surface is as follows:

[0026] Spread 100 kg of fermented rice straw base fertilizer evenly onto a 100 square meter surface and level it.

[0027] After the second month of cultivation, add mud, pick out the mud clams, and then evenly sprinkle 100kg of fermented rice straw base fertilizer onto the surface, level it, and then put the mud clams back in.

[0028] After the sixth month of cultivation, the mud was replenished again, the mud clams were picked out, and then 50 kg of fermented rice straw base fertilizer was evenly sprinkled on the surface, leveled, and then the mud clams were put back.

[0029] Furthermore, the water is changed once a month; the mudflats are agitated once a month.

[0030] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0031] 1) The fermented rice straw base fertilizer in this invention is rich in nutrients such as nitrogen, phosphorus, and potassium, which can significantly improve the fertility of the aquaculture pond, providing ample feed for mud clams, thereby increasing their growth rate and aquaculture efficiency. The beneficial microorganisms in the fermented rice straw base fertilizer can not only decompose organic matter such as uneaten feed and feces during the aquaculture process, reducing pollution of the aquaculture water and improving the aquaculture environment, but also inhibit the growth and reproduction of pathogens, reducing the occurrence of diseases in mud clams. The application of fermented rice straw base fertilizer can also promote the growth of benthic algae, providing mud clams with richer natural feed. At the same time, the nutrients in the base fertilizer can also improve the immunity of mud clams and enhance their disease resistance. The base fertilizer provides mud clams with sufficient nutrition and a good growth environment, making them grow healthier, of better quality, with normal shell color, rapid growth, and delicious meat. With the use of fermented base mud, the aquaculture pond water is clear and the water quality is stable, and the water change interval can be extended to once a month.

[0032] 2) The method of using fermented Spartina alterniflora as bottom fertilizer in this invention for the cultivation of mud clams involves mixing dredged bottom mud, Spartina alterniflora, and EM bacteria. By utilizing the anti-siltation and pollution-resistant ability of Spartina alterniflora in conjunction with EM bacteria, excess nutrients in the bottom mud are reused, providing mud clams with better nutritional components and living environment. This enables the sustainable cultivation and development of mud clams, not only turning the harmful invasive organism Spartina alterniflora into a valuable resource, but also solving the problem of direct discharge of dredged bottom mud into the sea, thus reducing seawater eutrophication.

[0033] 3) The method of using fermented rice grass as a base fertilizer in this invention not only improves the bottom structure of the aquaculture pond and increases the looseness of the bottom mud by spreading fermented rice grass in a gradient, thus avoiding hardening and compaction of the bottom mud, but also forms a nutrient gradient by spreading fermented rice grass in different proportions in layers, meeting the nutrient needs of the aquaculture organisms at different growth stages. Fermented rice grass base fertilizer 3 is relatively stable and suitable for long-term slow release of nutrients. Due to its high rice grass powder content and low overall viscosity, it is placed at the bottom layer to prevent silt pollution in the later stage, increase the aeration of the bottom mud, and avoid hypoxia caused by the respiration of a large amount of organic matter. Fermented rice grass base fertilizer 2 has moderate nutrients, which can meet the needs of mid-term growth. Fermented rice grass base fertilizer 1 is rich in nutrients and can quickly supply the needs of the aquaculture organisms in the early stage of growth, thus improving the growth rate of mud clams.

[0034] 4) The rice straw fermentation base fertilizer breeding method of the present invention makes the nutrition of the whole breeding process more balanced by supplementing base fertilizer and supplementing base fertilizer again, which provides a guarantee for the large amount of nutrients required in the middle and late stages of breeding, and reduces the incomplete utilization caused by large accumulation. The nutrients in the lower bottom mud cannot be fully utilized, which will increase bacterial respiration and cause hypoxia, thereby improving the growth rate of mud clams. Attached Figure Description

[0035] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The following embodiments of this application were carried out in an aquaculture pond on Shepan Island, Sanmen County, Zhejiang Province. The specific details of the aquaculture pond are as follows: the pond has a ring ditch, which is 1m deep and 4m wide, with a ditch-to-shoal area ratio of 1:3, and the ditch is connected to a sluice gate.

[0039] In the following embodiments of this application, the bacterial strains in the EM fermentation broth (hereinafter referred to as EM broth) are selected from the mixed feed additive microbial EM kit produced by Wuxi Sanzhi Biotechnology Co., Ltd., product standard number Q / 320205SZSW46, and consist of Lactobacillus plantarum, Enterococcus faecalis and a carrier, wherein Lactobacillus plantarum ≥ 1 × 10 8 CFU / mL, Enterococcus faecalis ≥3×10 7 CFU / mL.

[0040] Example 1

[0041] This application discloses a method for raising mud clams using fermented rice straw as a base fertilizer, comprising the following steps:

[0042] S1. Improve the quality of aquaculture mudflats: Around the time of Qingming Festival, drain the water from the aquaculture ponds to expose the mudflats. After draining the mudflats, till the mudflats and mix in 2.5 kg of fermented rice straw base fertilizer per square meter of mudflats. Use a wooden rake to level the mudflats to obtain an improved mudflat surface.

[0043] The specific ratio of fermented rice grass base fertilizer includes: 50kg of semi-dry breeding bottom mud, 10kg of rice grass powder, and 5L of EM bacterial solution;

[0044] The semi-dry aquaculture bottom mud consists of: dredged aquaculture bottom mud treated with 50g / m³ of bleaching powder. 3The EM solution is obtained after disinfection and sun exposure for two days to allow the bleaching powder to evaporate; the EM bacterial solution is composed of Lactobacillus plantarum, Enterococcus faecalis, and water, wherein the Lactobacillus plantarum content is ≥1×10⁻⁶. 8 CFU / mL, Enterococcus faecalis ≥3×10 7 CFU / mL;

[0045] The preparation method of the fermented rice straw base fertilizer is as follows: after mixing rice straw powder and bottom mud, EM bacterial solution is added for fermentation to obtain the fermented rice straw base fertilizer; the fermentation temperature is 30-45℃; the fermentation time is 1-3 months.

[0046] S2. Seedling release: 1000 mud clam seedlings are released per square meter of tidal flat surface;

[0047] Specifically, the specifications were: 1,000 mud clam seedlings per kilogram for cultivation, 1.25 kg per square meter, and a total of 125 kg of mud clam seedlings were stocked.

[0048] S3. Water exchange and freshwater discharge: 15 days after stocking, bring in 20-30cm of seawater, then change the water and stir the mudflats every month. Freshwater is discharged during inclement weather.

[0049] This method also includes:

[0050] Install isolation nets: Install 50-mesh polyethylene nets around the shellfish farming area with bamboo sticks to prevent various harmful organisms from entering. The bottom of the nets should be buried 40cm below the mud, and the height above the water surface should be 40cm higher than the highest water level after the pond is closed.

[0051] Separate rearing: Every six months, use a suitable mesh bag to scrape up the seedlings and catch the mud clams, then sort them by size for thinning and rearing;

[0052] Routine management: Check growth and shell color every 2 months; stir the mud surface with a wooden rake every 30 days or so to allow the fermented mud to better release nutrients and promote the growth of benthic algae;

[0053] Among them: it is normal for mud clams raised in ponds to be grayish-black in color. If the shell color is bluish or other colors, fertilization and transplanting should be taken in time.

[0054] Harvesting: When the mud clams reach the marketable size of 135 clams / kg, use a clam rake to scrape the mud clams into clam bags, wash them, and sell them on the market.

[0055] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0056] Fermented rice straw base fertilizer is rich in nutrients such as nitrogen, phosphorus, and potassium, which can significantly improve the fertility of the aquaculture pond, providing ample food for mud clams and thus increasing their growth rate and aquaculture efficiency. The beneficial microorganisms in the fermented base fertilizer can decompose organic matter such as uneaten feed and feces during the aquaculture process, reducing water pollution and improving the aquaculture environment. The application of base fertilizer can also promote the growth of benthic algae, providing mud clams with richer natural food. The beneficial microorganisms in the fermented base fertilizer can also inhibit the growth and reproduction of pathogens, reducing the occurrence of diseases in mud clams. At the same time, the nutrients in the base fertilizer can improve the immunity of mud clams and enhance their disease resistance. The base fertilizer provides mud clams with sufficient nutrition and a good growth environment, resulting in healthier growth, better quality, normal shell color, rapid growth, and delicious meat. Using fermented base mud results in clear and stable water quality in the aquaculture pond, allowing for water changes to be performed once a month.

[0057] Through scientific aquaculture management and reasonable harvesting methods, sustainable aquaculture and development of mud clams can be achieved. This not only turns harmful invasive species Spartina alterniflora into a valuable resource, but also solves the problem of direct discharge of aquaculture bottom mud into the sea after dredging, reducing marine pollution. By mixing the dredged bottom mud with Spartina alterniflora and using EM bacteria, the anti-siltation and pollution resistance of Spartina alterniflora, combined with EM bacteria, can also reuse excess nutrients in the bottom mud, preventing bottom hypoxia caused by eutrophication of seawater and providing mud clams with better nutrients and a better living environment.

[0058] Example 2

[0059] The above embodiments use EM bacteria mixed with the invasive species Spartina alterniflora and the sludge produced by aquaculture as bottom mud to provide mud clams with nutrition and a better living environment, and further optimize the water content of the sludge.

[0060] S1. Improve the quality of the aquaculture pond: Around the time of Qingming Festival, till the surface of the aquaculture pond, then mix in 2.5 kg of fermented rice straw per square meter, and use a wooden rake to level the surface of the shellfish aquaculture pond.

[0061] The specific steps for tilling and mixing in base fertilizer are as follows: drain the water from the aquaculture pond until the surface of the pond is exposed, till the central surface of the pond, then evenly spread 100 kg of fermented rice straw base fertilizer 3 onto the 100 square meter surface and level it with a wooden rake; next, evenly spread 100 kg of fermented rice straw base fertilizer 2 onto the leveled surface and level it with a wooden rake; finally, evenly spread 50 kg of fermented rice straw base fertilizer 1 onto the leveled surface and level it with a wooden rake.

[0062] The specific ratio of fermented rice grass base fertilizer 1 includes: 50kg of semi-dry breeding bottom mud, 10kg of rice grass powder, and 5LEM bacterial solution;

[0063] The specific ratio of fermented rice grass base fertilizer 2 includes: 45kg of semi-dry breeding bottom mud, 15kg of rice grass powder, and 5LEM bacterial solution;

[0064] The specific ratio of fermented rice grass base fertilizer 3 includes: 40kg of semi-dry breeding bottom mud, 20kg of rice grass powder, and 5LEM bacterial solution;

[0065] The semi-dry aquaculture bottom mud consists of: dredged aquaculture bottom mud treated with 50g / m³ of bleaching powder. 3 Disinfect and expose to sunlight for two days to allow the bleaching powder to evaporate;

[0066] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0067] Gradual application of fermented rice grass as base fertilizer improves the bottom structure of aquaculture ponds and increases the looseness of the bottom mud, which helps prevent the mud from hardening and compacting. By layering different proportions of fermented rice grass base fertilizer, a nutrient gradient can be formed to meet the nutrient needs of aquaculture organisms at different growth stages. Fermented rice grass base fertilizer 3 is relatively stable and suitable for long-term slow release of nutrients. Due to its high rice grass powder content and low overall viscosity, it is placed at the bottom layer to prevent sludge pollution in the later stages, increase the aeration of the bottom mud, and avoid oxygen deficiency caused by the respiration of a large amount of organic matter. Fermented rice grass base fertilizer 2 has moderate nutrients and can meet the needs of mid-term growth. Fermented rice grass base fertilizer 1 is rich in nutrients and can quickly supply the needs of aquaculture organisms in the early stages of growth, improving the growth rate of mud clams.

[0068] Example 3

[0069] The above embodiments are optimized by adjusting the proportion of rice straw to adapt to the breeding conditions at different stages, thereby further reducing the oxygen deficiency caused by the decomposition of organic matter in the later stages of breeding.

[0070] S1. Improve the quality of the aquaculture pond: Around the time of Qingming Festival, till the surface of the aquaculture pond, then mix in 2.5 kg of fermented rice straw per square meter, and use a wooden rake to level the surface of the shellfish aquaculture pond.

[0071] The specific steps for tilling and mixing in base fertilizer are as follows: drain the water in the aquaculture pond until the beach surface is exposed, till the central surface of the pond, and then evenly spread 100 kg of fermented rice straw base fertilizer 3 onto the 100 square meter surface and level it with a wooden rake.

[0072] After the second month of cultivation, add base fertilizer, pick out the mud clams, and then evenly sprinkle 100 kg of fermented rice straw base fertilizer onto the surface. After leveling it with a wooden rake, put the mud clams back in.

[0073] After the sixth month of cultivation, add base fertilizer again, pick out the mud clams, and then evenly sprinkle 50kg of fermented rice straw base fertilizer onto the surface. After leveling it with a wooden rake, put the mud clams back in.

[0074] The specific ratio of fermented rice grass base fertilizer 1 includes: 50kg of semi-dry breeding bottom mud, 10kg of rice grass powder, and 5LEM bacterial solution;

[0075] The specific ratio of fermented rice grass base fertilizer 2 includes: 45kg of semi-dry breeding bottom mud, 15kg of rice grass powder, and 5LEM bacterial solution;

[0076] The specific ratio of fermented rice grass base fertilizer 3 includes: 40kg of semi-dry breeding bottom mud, 20kg of rice grass powder, and 5LEM bacterial solution;

[0077] The semi-dry aquaculture bottom mud consists of: dredged aquaculture bottom mud treated with 50g / m³ of bleaching powder. 3 Disinfect and expose to sunlight for two days to allow the bleaching powder to evaporate;

[0078] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0079] By supplementing the base fertilizer and then supplementing it again, the nutrition in the overall breeding process is more balanced, ensuring the supply of a large amount of nutrients needed in the middle and later stages of breeding. It also reduces the incomplete utilization caused by excessive accumulation of nutrients in the bottom mud, which can lead to increased bacterial respiration and oxygen deficiency, thus improving the growth rate of mud clams.

[0080] Comparative Example 1

[0081] The difference from Example 1 is that fermented rice straw base fertilizer was not used.

[0082] The weight of mud clams was sampled and recorded in the third, fourth, and eighth months, and the results are shown in the table below. (Table comparing the growth and weight measurements of mud clam farmed with fermented rice straw base fertilizer).

[0083]

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for breeding mud clams by fermenting Spartina alterniflora as a base fertilizer, characterized in that, Includes the following steps: S1. Improve the aquaculture mudflat: Mix 3-5 kg ​​of fermented rice straw base fertilizer per square meter of mudflat to improve the mudflat surface and obtain an improved mudflat surface; The fermented rice straw base fertilizer consists of the following raw materials by weight: 40-50 kg of aquaculture bottom mud, 10-20 kg of rice straw powder, and 5 L of EM bacterial solution; the procedure for mixing the fermented rice straw base fertilizer into the tidal flat surface is as follows: Spread 100 kg of fermented rice straw base fertilizer evenly onto a 100 square meter surface and level it. After the second month of cultivation, add mud, pick out the mud clams, and then evenly sprinkle 100kg of fermented rice straw base fertilizer onto the surface, level it, and then put the mud clams back in. After the sixth month of cultivation, the mud was replenished again, the mud clams were picked out, and then 50 kg of fermented rice straw base fertilizer was evenly sprinkled on the surface, leveled, and then the mud clams were put back. S2. Seedling release: Release mud clam seedlings onto the improved tidal flat surface; S3. Water exchange and freshwater removal: 10-15 days after stocking, bring in 20-30cm of seawater, and then change the water and stir the mudflats every month. Harvest when the number of mud clams reaches 120-150 per kg.

2. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 1, characterized in that, In step S2, the mud clam seedlings must meet the requirement of 1000 grains / kg; Based on the total area of ​​the tidal flats, the release rate of the mud clam seedlings is 1000-1500 per square meter.

3. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 1, characterized in that, The preparation process of the aquaculture sediment is as follows: the aquaculture sediment dredged out is treated with bleaching powder 50 g / m 3 After disinfection and solarization for two days, the aquaculture sediment is obtained; The EM bacteria solution consists of Lactobacillus plantarum, Enterococcus faecalis and water, the Lactobacillus plantarum is ≥ 1 x 10 8 CFU / mL, the Enterococcus faecalis is ≥ 3 x 10 7 CFU / mL; The particle size of the rice grass powder is 0.2 cm.

4. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 3, characterized in that, The preparation method of the fermented rice straw base fertilizer is as follows: after mixing rice straw powder and bottom mud, EM bacterial solution is added for fermentation to obtain the fermented rice straw base fertilizer.

5. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 4, characterized in that, The fermentation temperature is 30-45℃; The fermentation time is 1-3 months.

6. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 5, characterized in that, Fermented rice straw base fertilizer includes fermented rice straw base fertilizer 1, fermented rice straw base fertilizer 2, and fermented rice straw base fertilizer 3. The ratio of fermented rice grass base fertilizer 1 includes: 50kg of semi-dry breeding bottom mud, 10kg of rice grass powder, and 5L of EM bacterial solution; The ratio of fermented rice grass base fertilizer 2 includes: 45kg of semi-dry breeding bottom mud, 15kg of rice grass powder, and 5L of EM bacterial solution; The ratio of fermented rice grass base fertilizer 3 includes: 40kg of semi-dry breeding bottom mud, 20kg of rice grass powder, and 5L of EM bacterial solution.

7. The method for raising mud clams using fermented rice straw as base fertilizer as described in claim 1, characterized in that, The water is changed once a month; the mudflats are stirred once a month.

Images