62 results about "Vermicompost" patented technology

The invention relates to the field of soil improvement, in particular to a method for improving saline-alkali soil through an alkali-reducing fertility-improving stress-resistant saline-alkali soil improver and application. According to the method, a three-factor four-level orthogonal soil improvement experiment is designed through desulfurization gypsum, wormcast and straw compost, the soil improvement effect is further verified in a crop cultivation mode, the optimal improvement proportion of the composition is calculated and determined through an entropy weight-topsis model, and through the mode of combined application of three substances, the soil improvement effect is improved by improving the most basic soil environment. Therefore, the stress damage of the saline-alkali soil to the plants is effectively reduced, and the purpose of improving the saline-alkali soil is achieved.

The invention discloses an earthworm compost upgrading method based on a bacillus velezensis BV-1 aerobic compost product. Comprising the following steps: by taking an aerobic compost rotten product pretreated by bacillus velezensis BV-1 as a substrate, adjusting the moisture content of the substrate to a proper value without additionally adding a conditioner, inoculating eisenia foetida, performing earthworm composting in a dark environment, slightly turning piles every 4-5 days during the period to prevent anaerobism, and maintaining the moisture content of the substrate to be stable. The quality of the earthworm cast is remarkably improved through'matrix advantage + microorganism continuation effect 'of a BV-1 aerobic composting product, and the total nitrogen content of the earthworm cast reaches 18.29 g / kg and is improved by 12.6% compared with that of a control group; the conductivity is reduced to 1.84 mS / cm and is reduced by 8.91% compared with that of a control group; meanwhile, a nitrogen cycle functional gene (the relative expression quantity of the nosZ gene is increased by 15 times compared with that of a control group) is activated, organic matter degrading bacteria Arenibacter (the relative abundance is 8.37%) are enriched, and unification of high nitrogen, low salt and high biological activity of earthworm compost products is achieved.

The invention discloses a preparation method and application of a wormcast granular bacterial fertilizer, and the wormcast granular bacterial fertilizer is prepared by adopting a base material ratio of wormcast to humus of 7: 3 through mechanical granulation, 80 DEG C constant temperature drying, particle cooling and functional bacterial agent spraying. The product has a remarkable application effect on various crops such as corn (grain corn, fresh corn and silage corn), hot peppers, tomatoes, traditional Chinese medicinal materials (radix glehniae, radix saposhnikoviae and radix achyranthis bidentatae) and the like, can give full play to the synergistic interaction effect of organic matrixes and functional microorganisms, and is stable in fertilizer efficiency, convenient to apply and suitable for industrial continuous production and large-area popularization and application.

This invention discloses a method for preparing a rice seedling substrate based on rice and wheat straw, its products, and applications. This application converts rice and wheat straw into earthworm castings, optimizes the earthworm castings, and prepares a rice seedling substrate more suitable for rice seedling cultivation practices in the middle and lower reaches of the Yangtze River. The water retention capacity of this seedling substrate is significantly superior to that of general seedling substrates. When using the "running water" irrigation method, it can continuously supply water to the seedlings even without timely irrigation, ensuring robust root growth; it can continuously control the pH of the seedling substrate, significantly improving the seedling's root development; and it can increase nutrient retention, ensuring the formation of strong seedlings.

The invention provides an organic improver for improving soil structure stability and an improvement method, and belongs to the technical field of improvement of specific waste soil of a refuse landfill. The organic improver for improving the soil structure stability comprises a physical improvement component and a chemical improvement component, the physical improvement component is wormcast with the particle size of 0 to 2.5 mm or 2.5 to 5.0 mm; the chemical improvement component comprises an inorganic base fertilizer and an organic fertilizer, and the application mass ratio of the organic fertilizer to the inorganic base fertilizer is (50: 1)-(40: 1). A physical-chemical coupling synergistic scheme is adopted, physical improvement components and chemical improvement components are clear in division of labor and have synergistic interaction, the core problems of soil physical structure hardening and chemical fertility deficiency are synchronously solved, the defect of single improvement effect in the prior art is overcome, and synchronous optimization of soil physical properties and chemical fertility is achieved.

The invention belongs to the technical field of biological bacterial fertilizer preparation, and relates to a composite wormcast biological bacterial fertilizer and a preparation and use method thereof. Mixing and pre-fermenting the modified cow dung and the modified corn straw; performing gradient inoculation on adult and young earthworms for biotransformation to obtain composite wormcast; carrying out enzymolysis on an organic nitrogen source, and compounding with humic acid to prepare a stable nitrogen source solution; and finally, mixing the composite wormcast, a nitrogen source liquid and a specific bacillus amyloliquefaciens inoculant in proportion, and carrying out stepped temperature-controlled fermentation to obtain a finished product. According to the method, through raw material biological modification, earthworm gradient conversion, nutrient enzymolysis compounding and functional bacterium directional fermentation multi-stage cooperation, the survival rate and activity of functional bacteria in the product and the soil colonization capacity are remarkably improved, nutrient slow release and supply and demand matching are achieved, and the functions of nutrient supply, growth promotion and disease resistance and soil improvement are integrated.

The invention relates to a method of producing nitrogen-enhanced vermicomposting through the incorporation of nitrogen-rich Gliricidia sepium leaves into a vermicomposting substrate. Organic waste materials including animal manure, crop residues, and food waste are blended with pre-dried and shredded Gliricidia sepium foliage in optimized proportions and decomposed by epigeic earthworms (Eisenia fetida) under mesophilic conditions (20–35 °C). The biological interaction between earthworms and microorganisms results in a finely divided, porous, humus-like vermicompost characterized by increased nitrogen, phosphorus, and potassium (NPK) levels and measurable nitrogen content.

This invention discloses a method for preparing bio-organic fertilizer that reduces the incidence of tobacco root-knot nematodes. The bio-organic fertilizer consists of a fermentation substrate, microbial inoculant, and earthworm castings in a mass ratio of 10:0.2-0.4:2-3. The invention uses Bacillus subtilis, Trichoderma harzianum, and Bacillus mucilaginosus in a mass ratio of 15-25:8-13:30-40 to prepare the microbial inoculant. The fermentation substrate and microbial inoculant are mixed and fermented. The fermentation substrate includes cow dung, wheat bran, straw, and earthworm castings. The bio-organic fertilizer of this invention can reduce the incidence of tobacco root-knot nematodes and also promotes tobacco root growth and increases tobacco leaf yield.

The invention provides a composite wormcast organic fertilizer for improving soil fertility and structure and a preparation method thereof, and belongs to the technical field of organic fertilizers. The compound wormcast organic fertilizer is prepared from the following raw materials: 55 to 65 parts of wormcast, 22 to 28 parts of composted livestock and poultry manure, 12 to 14 parts of straw powder, 3 to 4 parts of vermiculite, 2 to 3 parts of bentonite, 6 to 8 parts of modified charcoal and 1.5 to 2.5 parts of a compound functional bacterium agent, wherein the composite functional bacterial agent comprises nitrogen-fixing bacteria, phosphate solubilizing bacteria and silicate bacteria; the modified biochar is obtained by carrying out hydroxyapatite load modification on biochar. The raw material formula of the compound wormcast organic fertilizer is precisely optimized, meanwhile, a proper preparation process is matched, triple breakthrough of precise fertilizer supply, deep soil improvement and efficient pollution control is achieved, compared with the prior art, the advantages are remarkable, and the green, efficient and sustainable development requirements of modern agriculture are better met.

The present application relates to a kind of soda alkali soil composite organic acid modifier and its use method, the modifier includes 7-10 parts of citric acid, 1-3 parts of malic acid, 10-20 parts of earthworm manure and 70-80 parts of farm manure by weight fraction;When using, first, the citric acid, malic acid, earthworm manure and farm manure are mixed uniformly, it is composite organic acid modifier;Then, composite organic acid modifier is evenly applied on the surface of soda alkali soil, the application amount is 900-1100 Kg / mu;Subsequently, with the irrigation amount of 50-120 square / mu, it is waterlogged irrigation;Finally, for dry field, it is dried, when the field moisture content is suitable for agricultural machinery to work, it can be planted crops, for paddy field, after irrigation, field soaking and drainage, it is rice precision mechanical fixed-hole transplanting.The present application provides a kind of low-cost, simple operation, pollution-free improvement method.

The invention discloses a fertilizer for increasing the flavone content of Chinese yam tubers and a preparation method thereof, and relates to the technical field of fertilizers. The fertilizer comprises the following raw materials: 10-20 parts of tobacco straws, 8-16 parts of Chinese yam vines, 5-12 parts of mushroom dregs, 12-22 parts of sugarcane ash, 6-12 parts of plant ash, 35-45 parts of harmless animal byproducts, 20-27 parts of chicken manure, 15-20 parts of pig manure, 10-16 parts of pigeon manure, 5-10 parts of wormcast and 2-8 parts of a microbial agent. Harmless animal byproducts, tobacco straws, Chinese yam vines, mushroom dregs, livestock and poultry manure, sugarcane ash and plant ash are used as a raw material combination, the raw material combination is fermented by adopting a specifically combined microbial agent, and a mode of anaerobic fermentation and aerobic fermentation is adopted during fermentation; the fertilizer obtained through fermentation contains a large number of substances capable of improving the soil microenvironment, inducing stress resistance signals of the Chinese yam and stimulating generation of flavonoids of the Chinese yam, and the flavonoids content of the Chinese yam can be remarkably increased when the fertilizer is used for planting the Chinese yam.

1. Name of the product in this design: Packaging bag (earthworm castings organic fertilizer). 2. Purpose of this design: For product packaging. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a wormcast organic fertilizer and a preparation method thereof, relates to the technical field of organic fertilizer preparation, and aims to solve the problems of nutrient imbalance, insufficient decomposition, poor slow release performance and the like of the existing wormcast fertilizer. The method comprises the following steps: by taking agricultural wastes such as straw powder, peanut shell powder and the like, cow dung and wormcast as raw materials, inoculating a bacillus subtilis microbial inoculum containing alginate oligosaccharide, an aspergillus sydowii microbial inoculum and a streptomyces microflavus microbial inoculum containing mannitol, performing segmented fermentation, adding a multifunctional adhesive, and granulating, thereby obtaining the feed additive. The product realizes balanced nutrients and full decomposition, has good slow release performance and high particle strength, efficiently utilizes agricultural wastes, and improves the practicability and environmental protection value of the fertilizer.

The application discloses a kind of based on the construction method of anti-salt promoting system of biochar-worm castings, it includes the following steps: step one, using farm poultry and livestock manure and cut shredded Lycium barbarum branch, compost fermentation is obtained semi-rotted compost material;Step two, worm is inoculated in semi-rotted compost material and continues compost fermentation by adding biochar;Step three, using the second mixture material is raised to breed ridge, and worm castings layer containing worm cocoon is laid on breeding ridge;Step four, scatter sand onion seed on planting ridge, and graft lycium barbarum sprout on planting ridge;Step five, every 15 days, drip irrigation complex microbial agent aqueous solution is carried out on the surface of planting ridge.The application adopts worm in situ treatment semi-rotted compost material, and introduces biochar, forms biochar-worm castings planting soil matrix, in this process, using the measures that biochar is synergistically controlled to generate worm castings in situ replaces root zone soil, to strengthen microbial effect, alleviate the negative effect that salt stress produces to plant growth.

The application discloses an earthworm manure compound substrate for improving tomato yield and quality and a planting method, and comprises the following steps: a substrate is prepared from the following components in percentage by volume: soil 10-50%, earthworm manure 40-80% and vermiculite 10%; and 0.05-0.1% of nitrogen fertilizer and live earthworms in the total mass of the substrate; the nitrogen fertilizer is added to the substrate as a seedling raising substrate, the water content of the seedling raising substrate is adjusted, the seedling raising substrate is loaded into a plug tray, tomato seeds are sowed, and seedling raising is carried out by controlling the environmental temperature; after the seedlings reach a planting standard, the seedlings are transplanted into a planting bag filled with the seedling raising substrate for planting; after the planting and seedling recovery are completed, the live earthworms are inoculated into the seedling raising substrate in the planting bag to obtain a compound substrate; the water content of the compound substrate is controlled during the whole growth period of the tomatoes; the tomatoes are subjected to hanging, pruning, branch beating and leaf picking treatments; and the tomatoes are harvested after the fruits are matured. The application realizes the best balance between high yield and high quality of the tomatoes.

The invention belongs to the technical field of pepper cultivation, and particularly relates to a method for cultivating pepper with high vitamin C. The pepper is planted through slow heating recovery of pepper seeds, gradient seedling raising treatment, field planting management, daily management, pest control and harvesting. According to the method, the problems that existing cultivated peppers are low in quality and the vitamin content is reduced are solved, stable recovery is used in cooperation with secondary seedling culture, the seedling rate of seeds wrapped by the peppers is increased, and high yield and high quality of the peppers are achieved in cooperation with absorption of root systems to wormcast and xanthan gum.

The invention discloses a composite wormcast organic fertilizer for improving soil fertility and structure and a method, belongs to the technical field of organic fertilizer preparation, and aims to solve the problems of unstable fertilizer efficiency, difficulty in quality control, potential negative ecological effect and single function of the existing composite wormcast organic fertilizer. The organic fertilizer comprises the following raw material components in parts by weight: 40-60 parts of wormcast, 20-30 parts of a decomposed organic material, 3-5 parts of a functional microbial agent, 5-10 parts of a mineral additive and 2-5 parts of a conditioner. The preparation method comprises the steps of raw material pretreatment, segmented mixing, functional bacterium inoculation and low-temperature drying at 40-45 DEG C. The application amount is 200-300 kg / mu, soil organic matter can be increased, the granular structure can be improved, the fertilizer efficiency is stable, the safety is high, the concept of resource circulation is met, and the fertilizer is suitable for large-scale production and popularization.

The invention relates to the field of pesticide fertilizer production, in particular to sugarcane pesticide fertilizer production equipment capable of increasing the sugar content of sugarcane. The problems to be solved are that the filter mud which is not fully fermented harms earthworms, and the collected wormcast contains a small amount of filter mud. According to the technical implementation scheme, the sugarcane pesticide fertilizer production equipment capable of increasing the sugar content of the sugarcane comprises an outer frame and limiting plates installed on the front side and the rear side of the inner wall of the outer frame; the internal condition is observed through the rotating plate, filter mud harmful to the earthworms is removed, new filter mud is added, uniform distribution of the earthworms is promoted, and the conversion rate of the filter mud is further increased.

The invention discloses a bio-organic fertilizer for relieving continuous cropping obstacles of tobaccos as well as a preparation method and application of the bio-organic fertilizer, and belongs to the technical field of bio-organic fertilizers. The bio-organic fertilizer is prepared by taking wood biochar, rice straw biochar, sludge wormcast and cow dung wormcast as organic matrixes, inoculating aspergillus fumigatus JD-33 with a specific function and performing fermentation. The biological organic fertilizer can effectively improve the continuous cropping soil structure, inhibit soil-borne pathogenic bacteria and adjust rhizosphere microflora, so that the incidence rate of tobacco diseases is remarkably reduced, the yield and the output value are increased, and the purposes of relieving tobacco continuous cropping obstacles and promoting agricultural sustainable development are achieved.

The foldable three-dimensional layered earthworm breeding frame comprises a front supporting rod, a rear supporting rod, a breeding box, a front fixing pile and a rear fixing pile, the front supporting rod is rotationally connected with the breeding box through a short movable connecting rod, the rear supporting rod is rotationally connected with the breeding box through a long movable connecting rod, and the front supporting rod and the rear supporting rod keep a movable distance to achieve relative parallel movement. The front supporting rod is in a branch connection trunk shape so as to avoid the swing track of the long movable connecting rod and avoid mechanical interference, the front fixing pile is detachably connected with the bottom of the bottommost breeding box and the ground, and the rear fixing pile is rotationally connected with the lower end of the rear supporting rod and the two ends of the rear fixing pile are detachable. The tops of the rear supporting rods are connected through a transverse rod, the length of a protruding part is consistent with that of the rear fixing pile to ensure that the folded feeding box is horizontal, and the feeding box is provided with a containing box groove. According to the breeding frame, rapid folding and unfolding are achieved through the parallel folding design of the front supporting rod and the rear supporting rod, the vertical space is fully utilized during unfolding, the breeding space utilization rate is increased, the breeding box is tightly laid after folding, partitioned feeding, wormcast harvesting and adult earthworm transplanting are facilitated, and the advantages of being high in space utilization rate, flexible to operate, high in stability, wide in environmental adaptability and the like are achieved; and a novel equipment solution is provided for modern intensive earthworm breeding.

Title of the invention: Liquid biostimulant for plant growth. The present invention relates to a liquid biostimulant comprising at least a mass percentage of humic substances of between 5% and 15%, a mass percentage of extract of at least one alga of between 2% and 20%, a mass percentage of at least one spice of between 0.1% and 5%, a mass percentage of guano of between 0.05% and 10%, and vermicompost extract comprising at least one strain of bacteria of the genus Bacillus, at least one strain of bacteria of the genus Azotobacter, and at least one strain of bacteria of the genus Rhizobium. (Figure 1)

The present disclosure relates to a vermicomposter. It is disclosed a vermicomposter comprising: a frame supporting all functional components above ground level, a housing comprising an open upper inlet configured to receive organic waste and a lower outlet configured to discharge vermicompost, and an extraction device arranged at the lower outlet, wherein the lower outlet comprises a plurality of spaced structural members forming gaps that define a at least partially open bottom surface extended laterally on at least one side of the housing, thereby allowing passage of vermicompost through said gaps, wherein the extraction device comprises at least one horizontally movable scraping mechanism extending across substantially the entire width of the lower outlet, the scraping mechanism being movable along a horizontal path parallel to the bottom of the housing so as to displace and remove the accumulated vermicompost through said partially open surface, causing the vermicompost to fall to a collection area below the frame.

The invention discloses a preparation method and application of earthworm manure rich in zinc and selenium elements, and relates to the technical field of organic fertilizers, and the preparation method comprises the following steps: preparation of an earthworm feed fermentation material, preparation of an earthworm feed rich in zinc and selenium elements, preparation of the earthworm manure rich in zinc and selenium elements, and post-treatment of the manure. The zinc content and the selenium content of the prepared earthworm manure rich in zinc and selenium are far higher than those of common earthworm manure, when the earthworm manure is applied to agricultural product production, the zinc content and the selenium content of agricultural products can be greatly improved compared with those of agricultural products without the earthworm manure, the requirements of selenium-rich agricultural products can be met, and zinc-rich and selenium-rich functional agricultural products meeting the national standard can be directly produced; and the market supply gap is filled.

The application belongs to the technical field of organic fertilizer and discloses a method for producing high-quality organic fertilizer by fermenting mushroom residue, straw and earthworm manure, wherein corn straw and mushroom residue are crushed and mixed, clay is added, and the auxiliary material is obtained by mixing the mixture of the crushed mushroom residue and straw with the mixed water of the color velvet leather fungus agent; the main material is obtained by uniformly mixing the earthworm manure with the enzyme bacteria preparation and carbon monoxide streptomycin; the total amount and humidity of the material are controlled, the main material and the auxiliary material are uniformly mixed, and then the mixture is placed in a fermentation tank for strip-pile fermentation; during the fermentation process, the height and width of the fermentation pile are controlled, the water content is adjusted, and the fermentation temperature and total fermentation time are controlled; and the high-quality organic fertilizer is obtained after stacking. The high-quality organic fertilizer is obtained by mixing and fermenting the appropriate amount of earthworm manure with the appropriate amount of crushed mushroom residue and straw, so that the toxic substances are decomposed and reduced, the harmful pests and diseases and grass species are inactivated at high temperature, the maximum amount of lignocellulose is decomposed, and the organic fertilizer with high nutrition, high aggregate and high active substances is formed.

The utility model belongs to the field of earthworm breeding, and provides an earthworm breeding device which comprises a breeding component, a humidifying component, a heating component and a controller, the breeding component comprises a breeding box, a collecting box, a breeding plate and a vibrating screen, the collecting box is located on the lower portion in the breeding box, and the collecting box is in sliding connection with the side wall of the breeding box; the collecting box is arranged in the breeding box so that the collecting box can be pulled out of the breeding box, the vibrating screen is arranged in the breeding box and located above the collecting box, the vibrating screen enables wormcast to fall into the collecting box, earthworms are left on the vibrating screen, an opening is formed in the side wall of the breeding box, and the breeding plate is located above the vibrating screen. The breeding plate is slidably connected with the side wall of the breeding box, so that the breeding plate can enter and exit from the opening in the side wall of the breeding box, and the breeding plate is used for breeding earthworms. The earthworm breeding layer does not need to be moved, earthworm cast can be separated in the breeding box, and operation is easy and convenient.

The invention discloses a composite nitrogen fertilizer synergist and application thereof in improving the nitrogen utilization rate of crops. The composite nitrogen fertilizer synergist comprises the following components: 5-15g / mu of gamma-polyglutamic acid, 50-100kg / mu of wormcast and 0.02-0.06 g / mu of hemin. The composite nitrogen fertilizer synergist is uniformly mixed in a nitrogen fertilizer such as urea, and the nitrogen fertilizer is applied according to the conventional dosage and period in the whole planting process; the nitrogen utilization rate is synergistically increased through a physical, biological and physiological trinity mechanism by utilizing the synergistic effect of gamma-polyglutamic acid, wormcast and hemin in soil; the crop nitrogen fertilizer utilization rate is increased to about 50%; the operation is simple, the cost is extremely low, and the popularization and application prospects are extremely good.

The invention discloses a balanced water and fertilizer management method for greenhouse tomato yield and quality, which is characterized in that a group benefit value, an individual regret value and a compromise evaluation value of each test water and fertilizer scheme are obtained by adopting a CRITIC-VIKOR comprehensive evaluation model, and then a wormcast irrigation management strategy meeting compromise requirements is obtained by comparing the group benefit value, the individual regret value and the compromise evaluation value. Compared with the prior art, the method has the advantages that the CRITIC-VIKOR comprehensive evaluation model has remarkable advantages in greenhouse drip irrigation tomato water and fertilizer management optimization, the core advantage of the method is that compromise thoughts are fused, all indexes are comprehensively analyzed and evaluated in subjective and objective aspects, the CRITIC method is mainly used for objective weighting, and the method has the advantages of being high in evaluation accuracy and high in evaluation efficiency. The comparison strength and conflict between indexes are comprehensively considered, and the group utility maximization and the individual regret minimization are comprehensively considered by the VIKOR model; in addition, compromise thoughts can be integrated according to preferences of decision makers, and higher sorting stability and credibility are achieved.

The application discloses a kind of compound fertilizer special for rice and its purposes in preventing and treating rice damping-off caused by fusarium, belong to fertilizer technical field.The fertilizer includes the following components according to mass fraction: ammonium chloride 20-25 parts, potassium chloride 20-25 parts, calcium superphosphate 15-20 parts, ammonium sulfate 5-10 parts, ammonium molybdate 3-5 parts, earthworm manure organic fertilizer 50-60 parts, humic acid 15-20 parts, attapulgite clay powder 10-15 parts, chitosan oligosaccharide 5-8 parts, dandelion extract 3-5 parts, and compound microbial inoculant 3-5 parts.The components in the compound fertilizer cooperate with each other, not only can make the acid effect of the compound fertilizer last long, resist washing, suppress underground salt alkali, adjust soil structure, inhibit fusarium reproduction, and create a suitable growth environment for root growth, but also can improve the disease resistance of rice seedlings and effectively reduce the incidence of rice damping-off.

The invention relates to the technical field of organic fertilizers, in particular to a biochar composite wormcast organic fertilizer which is composed of phosphoric acid-microwave combined activated modified biochar, secondary decomposed wormcast, a composite functional microbial agent, a calcium humate-modified chitosan composite slow-release agent and decomposed vinasse treated by steam explosion. The modified biochar is prepared by taking peach wood residues and corn straws as raw materials and carrying out earthworm composting and aerobic and anaerobic decomposition on secondary decomposed wormcast, the complex microbial inoculant contains various bacilli, and the fertilizer is uniform in particle size and high in organic matter content. Phosphoric acid-microwave combined activated charcoal is adopted, the pore structure is better, and the adsorption capacity is high; the secondary decomposition process ensures thorough decomposition of wormcast and easy absorption of nutrients; the compound slow-release agent regulates and controls nutrient release, and unbalance of supply and demand is avoided; vinasse is subjected to steam explosion to improve microbial activity and enhance comprehensive efficiency of the fertilizer.

The invention relates to an earthworm screening device for mine soil remediation. The earthworm screening device comprises a primary separation assembly, a blanking bin, a collecting bin, a vertical partition plate, a light source, a transverse partition plate, non-woven fabric, holes and air holes. Young earthworms and most of wormcast are screened out through the primary separation assembly, adult earthworms fall into the falling bin through a discharging port of the primary separation assembly, and due to the fact that the earthworms have the negative phototaxis of avoiding light rays and the touch property of the earthworms like drilling in holes, the earthworms in the falling bin try to find a dark and shelter, and the earthworms in the falling bin are prevented from being damaged. The earthworms can rapidly penetrate through the non-woven fabric and the holes through the wet non-woven fabric under the attraction of the bait, and in the penetrating process, wormcast on the bodies is scraped off by the wet non-woven fabric and finally reaches the clean collecting bin to be collected, so that the screening effect of the earthworms is improved, and the situation that the wormcast attached to the bodies of the earthworms introduces a new pollution source into a remediation site is avoided; further, the remediation effect of the earthworms on the mine soil is improved.