70 results about "Vallisneria natans" patented technology

The invention discloses a freshwater crayfish feed for improving the meat quality. The freshwater crayfish feed is prepared from the following substances in parts by weight: 30 to 40 parts of soybean meal, 10 to 15 parts of corn meal, 8 to 10 parts of tea seed cakes, 6 to 10 parts of bone powder, 8 to 10 parts of mussels meat, 15 to 20 parts of silkworm chrysalis, 3 to 5 parts of smilacina atropurpurea, 4 to 6 parts of vallisneria natans, 2 to 4 parts of potamogeton distinctus, 5 to 8 parts of bentonite, 8 to 10 parts of sugarcane bagasse, 1 to 3 parts of composite vitamin, 1 to 2 parts of amino acid chelate, 3 to 5 parts of a Chinese herbal additive, and 4 to 6 parts of a composite additive. The feed disclosed by the invention is comprehensive and balanced in nutrition; the variety of raw materials is rich, so that the demands of freshwater crayfish in different periods for growth can be met; most of the used raw materials are pure and natural environment-friendly raw materials, and no drugs are retained in the bodies of the freshwater crayfish; the yield can be greatly increased; meanwhile, the freshwater crayfish tastes delicious and is chewy, so that a better breeding benefit is realized.

The invention discloses a rapid self-forming method of a vallisneria natans underwater meadow, relating to a large-area and large-scale water environment biological treatment technique. The method comprises the steps of: (1) collecting fertile lake mud, clay and degradable fibres; (2) preparing a vallisneria natans culture substrate according a volume ratio of the lake mud, the clay to the degradable fibres of 40: 40: 20 and filling the culture substrate in a detachable mould which is 60 cm in length, 30 cm in width and 8 cm in height; (3) putting the mould in a cement pond which is good in illumination conditions and has adjustable water level; (4) collecting healthy and strong winter buds of the vallisneria natans and sowing the buds in the culture substrate; and (5) adjusting the waterlevel in the cement pond duly according to growth height of the vallisneria natans so that the vallisneria natans can grow rapidly and thereby are branched and combined to form the meadow. The rapid self-forming method of the vallisneria natans underwater meadow disclosed by the invention can produce plenty of vallisneria natans meadows in a large scale, is convenient for implementation and construction, and can rapidly and efficiently recover submerged plants in a nutrient-rich shallow lake so that a foundation for further optimizing aquatic plant community is provided, thereby aquatic ecosystem structure is improved and ecological system stabilization is promoted.

The invention relates to a method for cultivation and colonization of rooty dwarf vallisneria natans. The method includes preparing rooty dwarfing nutrient solution, preparing cultivation basic substances, making a colonization device, immersing vallisneria natans in the rooty dwarfing nutrient solution, and transplanting the vallisneria natans into the colonization device. The colonization device is formed by an upper-layer hemp rope net, a lower-layer hemp rope net and the cultivation basic substances. Rooty and short plants are grown in the nutrient solution, deposit releasing nutrition salt can be suppressed during water ecology restoration, and meadow type underwater landscape is formed. The cultivation and colonization device can be used to cultivate seedlings and satisfies construction needs in a room for all year round, and the colonization device covers the deposits and suppresses the nutrition salts from being released. Materials used are environmental friendly and nontoxic. The speed and quality of water ecology restoration are improved.

The invention discloses a selenium-enriched feed for aquarium fish. The selenium-enriched feed is characterized by being prepared from the following raw materials in parts by weight: 10-13 parts of silkworm pupae powder, 14-17 parts of maelworm powder, 12-15 parts of oat, 15-18 parts of cottonseed cakes, 17-21 parts of soybean meal, 18-22 parts of hydrilla, 3-6 parts of onion heads, 1-3 parts of shallots, 1.2-2.5 parts of garlic, 12-14 parts of hackle powder, 0.4-0.7 part of selenium vican powder, 16-19 parts of green dry grass powder, 0.2-0.4 part of calendula, 0.1-0.3 part of radix scutellariae, 0.3-0.5 part of American ginseng, 0.4-0.6 part of vallisneria natans, 4-7 parts of an auxiliary and a proper amount of water. The feed disclosed by the invention is added with the selenium vican powder, so that the feed is enriched with a trace element, namely selenium and has the functions of improving the immunity of the aquarium fish, reducing the death rate and the like; meanwhile, the raw materials of the feed are readily available, and the chemical additives such as pigments are not added; the aquarium fish fed by the feed is fresh in color and is higher in ornamental value.

Disclosed is a hair dye comprising Chinese herbal constituents of (by weight ratio) fleece-flower root 98-108g, dried rehmannia root 58-68g, eclipta 48-58g, amphibious crab chrysanthemum 48-58g and vallisneria natans 38-48g.

The invention discloses a feed of crabs. The feed is prepared from the following components in parts by weight: 10-15 parts of Hanayama bran, 8-12 parts of rapeseed meal, 9-13 parts of soybean meal, 5-10 parts of tubificidae powder, 15-20 parts of fish meal, 10-13 parts of middlings, 5-10 parts of yolk powder, 6-8 parts of chicken liver powder, 5-8 parts of chicken blood powder, 6-8 parts of kelp powder, 4-8 parts of elodea nuttallii leaves, 5-7 parts of vallisneria natans, 4-5 parts of myriophyllum spicatum, a proper amount of salt, and 4-5 parts of a preservative, wherein the preservative is prepared from the following components in parts by weight: 10-15 parts of sorbitol, 4-8 parts of monosaccharides, 1-5 parts of sweet potato powder, 5-8 parts of gluconic acid and 4-7 parts of natamycin. The feed is an ecological and green feed, and is capable of obviously improving the disease resistance of crabs, greatly increasing the survival rate of crabs, ensuring the high breeding speed of crabs and improving the yield of crabs when being used for feeding crabs.

A method for the aseptic culture of vallisneria used for restoring the aquatic ecosystem and providing the good to fish, shrimp and crab and the spawning site for them, and the fast reproduction of its engineering seedlings is disclosed, which features use of tissue culture and enlarged reproduction.

The invention provides an economical and fast planting method and device for submerged plant eel grass. The submerged plant eel grass can be widely applied to the benthophyte planting fields of waterecological restoration and management, underwater desert greening, aquaculture, garden waterscape, aquariums and the like. The device is an eel grass planting frame in the shape of a circular truncated cone, the side face of the eel grass planting frame can be opened and closed, the eel grass planting frame is of a three-section type frame-shaped structure, and eel grass can be thrown to be planted. Each section comprises an upper covers, a side wall and a lower bottom, the upper covers, the side walls and the lower bottoms of the sections are basically identical in shape, the shapes of the upper covers, the side walls and the lower bottoms are designed according to the different growth features of the fibrous roots, the stolons and the leaves of the ell grass and are completely different,the structure is simple, the device can be punched to be formed at a time, and the cost is low. The enframed eel grass can be fast cultivated through a throwing method; compared with a traditional cultivating method, a large quantity of manpower, material resources and time cost can be reduced; meanwhile, courtyards, communities, parks and other hardened bottom water areas can be made into harmonious and ecological gardens.

The invention relates to a fish feed, and especially relates to a low-cost plecoglossus altivelis compound feed. The invention also relates to a preparation method of the compound feed. The compound feed is composed of the following components in parts by weight: 10 to 20 parts of soybean meal, 10 to 20 parts of peanut meal, 10 to 20 parts of cotton meal, 8 to 16 parts of strong flour, 8 to 14 parts of rice bran, 6 to 10 parts of caloglossa leprieurii, 5 to 8 parts of dry clam worm powder, 5 to 8 parts of ulva powder, 4 to 8 parts of mung bean powder, 4 to 6 parts of pea powder, 4 to 6 parts of dry carrot powder, 4 to 6 parts of potato powder, 3 to 5 parts of cordate houttuynia, 3 to 5 parts of purslane, 2 to 4 parts of rhizoma kaempferiae, 1 to 3 parts of vallisneria natans, 1 to 3 parts of saxifrage, 2 to 4 parts of shell powder, 3 to 5 parts of fish oil, and 2 to 4 parts of xanthan gum. The cost of the compound feed is low, the raw materials are green and environment-friendly, the compound is attractive to plecoglossus altivelis, and the living rate is high.

The invention belongs to the field of plant tissue culture technique. The invention employs the regenerative method of isolated culture of kuh-weed bulb to produce high grade tissue sprout of kuh-weed in large scale. The method overcomes the shortage of low survival rate in natural condition of the seed, affective to soil thickness of germination in winter and non germination of a large amount of winter sprout to grow into plant. The invention can meet demand of establishing aquatic vegetation and reduce water pollution.

The invention provides an ecological culture method capable of controlling picornvirus diseases in river crab culture. The ecological culture method comprises the following steps: I. pretreating a culture pond: adjusting the pH value of the sediment in the pond with quick lime, and exposing the bottom of the pond to the sun; II. determining the stocking variety and quantity in the river crab culture pond: stocking river crabs, intercropping freshwater shrimps and inter-culturing mandarin fish in the river crab culture pond; III. cultivating waterweeds in the river crab culture pond, including potamogeton crispus, potamogeton maackianus, ceratophyllum demersum, hydrilla verticillata, vallisneria natans, waterweeds, water chestnuts and nymphaea tetragona; IV. transplanting shellfish in the river crab culture pond, wherein the variety of the transplanted shellfish includes snails, clams, corbicula and other fresh and live shellfish; and V. using a biological agent in the river crab culture pond, wherein effective microorganisms (EM) mainly formed by bacilli, acetic acid bacteria, bifidobacterium, actinomycetes, photosynthetic bacteria, lactobacilli, saccharomycetes, and the like are mainly used. High-quality river crab culture ecological water areas can be provided by adopting the method, so that the river crab survival rate is high and high-quality and high-grade river crabs can be cultured. The method is capable of effectively preventing picornvirus diseases in river crab culture.

The invention belongs to the field of water body ecological restoration, and particularly relates to a method for controlling eel grass surface attachments and moss by utilizing Radix Montfort. The method includes the following step of throwing the Radix Montfort in a water body where eel grass grows. The method does not use chemical medicament and plant medicament which have a negative impact onthe ecology of the water body and does not adopt expensive engineering measures, but the method adopts an ecological control method according to unique ecological habits of the Radix Montfort and ecological principles, which have not any adverse effects on environment and are of great significance for maintaining the stability of submerged vegetation in a eutrophication water body.

The invention relates to the field of plant molecular markers, in particular to an SNP marker related to vallisneria identification and an application of the SNP marker. The SNP marker comprises one or more of first to twenty-second SNP marker. The invention also provides a primer group and kit for detecting the SNP marker related to vallisneria identification. The related SNP marker for vallisneria identification fills the technical blank of vallisneria SNP molecular marker development, can realize high-throughput operation, has very high accuracy, is simple in data reading, saves the cost, improves the efficiency, provides a scientific basis for rapid identification and evaluation of the genetic relationship of all vallisneria subspecies, and provides a theoretical and data support for establishing a vallisneria molecular assisted breeding technology platform, and an efficient detection method is provided for breeding high-quality vallisneria varieties. Theoretical basis and technical means are provided for evaluating genetic characteristics of eel grass varieties in China, identifying specific eel grass varieties and the like, and the method has important theoretical value and application significance.

The invention discloses an ethoxysulfuron and fenoxaprop-p-ethyl-containing herbicidal composition, a preparation method thereof and application thereof. The herbicidal composition consists of a compound (A), namely ethoxysulfuron, and a compound (B), namely fenoxaprop-p-ethyl, wherein the weight ratio of the compound (A) to the compound (B) is 1:1-100. The herbicidal composition can be prepared into the conventional pesticide formulations, such as wettable powder, suspending agents, water dispersible granules and the like, by the modern pesticide processing technology after being mixed according to the proper proportion, and is used for controlling and removing annual broadleaf weeds, cyperus rotundus and algae in rice fields, such as monochoria vaginalis, spirogyra, lichen, pontederiaceae, fimbristylis, cyperus difformis, cyperus iria, eleocharis acicularis, juncellus serotinus, scirpus juncoides, eleocharis plantagineiformis, pondweed, alisma orientale, eclipta prostrate, sagittaria pygmaea, sagittaria sagittifolia, bidens tripartite, sticktight, ludwigia hyssopifolia, ludwigia prostrate, rotala indica, ammannia arenarid, ammannia baccifera, marsilea quadrifolia, najas minor, eel grass, pipewort and the like, and grass weeds such as cockspur grass, moleplant seed and the like. The control effect of the herbicidal composition is obviously better than that of the single compound (A) or the single compound (B). Moreover, the application amount of each active substance is greatly reduced.

The invention relates to a beautifying and health preserving beef sauce and a preparation method thereof. The beautifying and health preserving beef sauce is characterized in that the beautifying and health preserving beef sauce is prepared from the following raw materials by weight: 50-55 parts of beef, 2-3 parts of tussilago farfara, 1-1.5 parts of medlar leaf, 1.1-1.3 parts of fructus alpinae oxyphyllae, 0.8-1 part of abrus cantoniensis, 2-2.3 parts of cushaw flower, 1.3-1.5 parts of vallisneria natans, 1.5-1.8 parts of common adenostema herb, 3-4 parts of Roe, 8-10 parts of soy sauce, 40-45 parts of watermelon peel, 10-12 parts of pigskin, 8-9 parts of white tremella, 10-12 parts of corn starch, 300-320 parts of sweet flour paste, and 7-8 parts of a nutritional additive. According to the present invention, the beautifying and health preserving beef sauce has characteristics of good palatability and delicious taste; the watermelon peel is added so as to add the fresh fragrance of the fruit; the soup material prepared by boiling the pigskin and the white tremella is rich in nutrition and can provide effects of beautifying and face nourishing; and the beautifying and health preserving beef sauce further contains a variety of Chinese herbal ingredients so as to provide effects of liver nourishing, kidney tonifying, heat clearing, detoxification, tendon nourishing, and blood nourishing after regular taking.

The invention discloses a culture method for improving a survival rate of macrobrachium rosenbergii. The method comprises the following steps: 1) building a pond: selecting a pond with an area of 5-10mu and a depth of 1.8-2.2 meters as the culture pond; arranging a layer of phyllostachys edulis at the bottom of the culture pond, and planting vallisneria natans, hydrilla verticillata, potamogetonwrightii, and Diluocai around the culture pond; 2) adjusting water quality: performing sterilization treatment on the culture pond by utilizing camellia oleifera seed cakes and quicklime; 3) throwingyoung macrobrachium rosenbergii: throwing the young macrobrachium rosenbergii from the February to the March every year, wherein the number of the young macrobrachium rosenbergii thrown into per mu ofthe culture pond is 1-1.5 million; and 4) performing culture management: starting an aeration system and a heating system, and performing concentrated feeding in heating areas; and after feeding is performed for 2-3 months, heating water of the whole culture pond, and when the water in the culture pond is heated to the temperature of 28-32 DEG C, performing distributed feeding. According to the invention, the method is simple and easy to implement and promote, can improve the survival rate of the macrobrachium rosenbergii to be 70% or more, and has broad development prospects and economic benefits.

The invention discloses a feed for improving meat quality and mouth feel of crabs. The feed includes the following raw materials: vallisneria natans, elodea nuttallii, seaweeds, powder of volvaria volvacea, soybean meal, flour, rapeseed meal, cotton powder, wild trash fish, mantis shrimps, meat of margarya, powder of limnodrilus hoffmeisteri, dried silkworm chrysalis, meat of clam, Wu Fei powder, calcium dihydrogen phosphate, phospholipid oil, phosphates, choline chloride, lard, inositol, betaine, a micro-element chelated composite, vitamin C, vitamin E, cellulose, and a Chinese traditional medicine antibacterial composite. The feed has abundant nutrients and good palatability, can satisfy nutritional demand of crabs during a growth period, can increase growth speed and improve significantly meat quality, and also can improve disease resistance and is high in safety.

The invention relates to a pharmaceutical composition for treating abnormal menstruation. The pharmaceutical composition is prepared from the following raw materials in parts by weight: 15 to 35 parts of Chinese angelica, 10 to 30 parts of semen cuscutae, 10 to 20 parts of ligusticum wallichii, 10 to 20 parts of loofah sponge, 15 to 30 parts of lalang grass rhizome, 10 to 20 parts of bark of Japanese cinnamon, 5 to 20 parts of rheum franzenbachii, 5 to 15 parts of polygonum aviculare, 10 to 20 parts of red sage root, 5 to 15 parts of purslane speedwell, 5 to 15 parts of bitter bamboo leaf, 5 to 15 parts of eupatorium fortune, 10 to 30 parts of edible tulip, 10 to 20 parts of herb of filliform cassytha, 10 to 20 parts of root of Chinese pulsatilla, 5 to 15 parts of begonia fimbristipula, 5 to 10 parts of root of kudzu vine, 5 to 15 parts of cortex fraxini, 10 to 20 parts of globeflower, 10 to 20 parts of semen sinapis, 5 to 15 parts of vallisneria natans, and 5 to 15 parts of pine root. The pharmaceutical composition has the functions of activating blood, regulating menstruation, removing stasis, dissipating binds, nourishing and regulating blood, tonifying middle jiao, and boosting qi, can be used to treat abnormal menstruation and dysmenorrheal caused by various reasons, and does not have any side or toxic effect, and the curative effect is prominent.

The invention discloses a method for cultivating bitter weed seedlings, which comprises the following steps: digging the seedbed to a depth of 8 to 10 centimeters, breaking the soil blocks, adding 0.3 to 0.5 kilograms of humus per square meter of the seedbed, stirring evenly, and then feeding the seedlings Add water to the field, and add bleaching powder to the water for disinfection; choose bitter grass with a plant height of 15 to 20 cm as seedlings, put them in the disinfection pool and soak them for 6 to 10 minutes; The seedlings are one-pot, spray the hormone combination solution on the seedbed, and then cover the seedlings with a film; control the water temperature in the nursery field to be 15 to 30 degrees, and when the seedlings are transplanted into the nursery field for 48 to 52 days, the new growth formed by the rhizomes will form. The bitter grass seedlings will grow to a plant height of 10 cm; remove the film covering the bitter grass seedlings, add water to the seedbed, keep it for 9 to 11 days, and move the seedlings out of the nursery field to obtain the bitter grass seedlings. The method of the invention breaks the season limitation of Erytheria galerica planting, and overcomes the disadvantages of high cost, long period and high operation requirements in its tissue culture technology.

The invention relates to the field of environmental engineering, in particular to a method for promoting the growth of bitter grass seedlings and its application. The method comprises the following steps: adding a water body containing microorganisms into an incubator, placing bitter grass seedlings in the water body containing microorganisms for cultivation, supplemented by intermittent aeration. The method of the invention is simple, increases the survival rate of the bitter weed seedlings by more than 10-30%, has low economic cost, is suitable for actual production and application, and has great significance for the rapid growth and reproduction of the bitter weed in eutrophic water bodies.

The invention discloses a preparation method of a lobster trapping bait. The bait comprises waterweed powder, fish powder, Chinese asafetida powder, Vallisneria natans powder, black bean powder, earthworm powder, drawing powder, banana powder, peach powder, Pinellia Tuber powder and broken rice. The lobster trapping bait has the advantages of convenient formula and preparation method, low medicine prices and reasonable compatibility, has a dense fragrance and a sweet taste, and has an especially-dense sweet fragrance after going into water, so lobsters can smell the sweet fragrance of the trapping bait faraway and can see the slowly puffed and dispersed bait added into the water, and the bait looks like a live sinking food, thereby abundant lobsters can be trapped together within a shortest period of time.

A technique of growing deep-water plants comprises the main steps of A), growing Hydrilla verticillata, to be specific, planting Hydrilla verticillata grown to shape into a tank; B) cultivating Vallisneria natans, to be specific, cultivating seeds of Vallisneria natans to germinate; C) planting and mixing, to be specific, planting the germinated seeds of Vallisneria natans in a tank with Vallisneria natans; D) adding water, to be specific, adding water to the whole tank; and E) providing late maintenance, to be specific, and observing and thinning, in late stage, the Hydrilla verticillata andVallisneria natans after adding of the water. The technique of the invention is scientific and reasonable; the origins of the materials are simple and easy to attain; the planted Hydrilla verticillataand Vallisneria natans have rich roots; pollutants can be purified; water quality can be improved; soil in the embankments of a river with torrential flows, a dam, torrents and otherness can be reinforced effectively, and the ecological environment is improved.

The invention provides fragrant coffee duck meat strips. The fragrant coffee duck meat strips are prepared from the following raw materials in parts by weight: 300-320 parts of duck meat, 60-80 parts of mung bean starch, 20-30 parts of coffee beans, 60-70 parts of grapefruit juice, 30-40 parts of sesames, 20-30 parts of unpolished rice, 5-7 parts of poria cocos, 6-8 parts of glycyrrhiza uralensis fisch, 4-5 parts of vallisneria natans hara, 10-12 parts of ilex latifolia thumb and the like. The invention discloses the fragrant coffee duck meat strips which contain coarse grains, namely the unpolished rice, the sesames and the like, and have abundant nutrient substances, namely dietary fibers and the like; and extracts of poria cocos, glycyrrhiza uralensis fisch, ilex latifolia thumb and the like have certain effects of clearing and decreasing internal heat so that the fragrant coffee duck meat strips are suitable for people who easily have internal heat and poxes to eat.

The invention discloses a lemon sour and hot flavor shredded pork with salted vegetable. The lemon sour and hot flavor shredded pork with salted vegetable is made through using, by weight, 250-300 parts of fresh potherb mustard, 20-30 parts of lean pork, 10-20 parts of capsicum circles, 10-12 parts of shredded ginger, 8-10 parts of lemon powder, 2-3 parts of corn oil, 10-11 parts of litchi pulp, 6-8 parts of Pleurotus ostreatus, 11-14 parts of pig's brain, 3-4 parts of chicken's gizzard membrane, 2-3 parts of Pellionia repens, 1-2 parts of honeysuckle flower, 1-2 parts of Vallisneria natans, 1-2 parts of Aristolochia debilis Sieb. et Zucc., 5-6 parts of white sugar, a proper amount of salt, a proper amount of water and a proper amount of food level sodium bicarbonate. The lemon sour and hot flavor shredded pork with salted vegetable is obtained through the following steps: pickling, desalting, mixing with auxiliary materials, disinfecting, and packaging. The finished lemon sour and hot flavor shredded pork with salted vegetable is crisp and tasty, and has good taste and mouthfeel; and the added litchi pulp has the efficacies of invigorating spleen and benefiting liver, rectifying qi and enriching blood, and invigorating heart and tranquilizing mind, and the added honeysuckle flower and other Chinese herbal medicines have the efficacies of clearing heat, detoxifying, and dispelling wind and heat.

The invention discloses a method for cultivating vallisneria natans seedlings. The method includes steps of digging a seedling bed with the depth ranging from 8 centimeters to 10 centimeters, smashing soil blocks, adding from 0.3 to 0.5 kilogram of humus soil to each square meter of seeding bed, uniformly stirring the humus soil in the seedling bed, adding water into a seedling culture field and adding bleaching powder into the water for disinfection; selecting vallisneria natans with plant heights ranging from 15 centimeters to 20 centimeters as annual seedlings, and placing and soaking the annual seedlings in a disinfection tank for 6 to 10 minutes; transplanting the annual seedlings on the seedling bed, dividing each three to five annual seedlings as a stump, spraying combination hormone liquid on the seedling bed and covering a thin film on the annular seedlings; controlling the temperature of the water of the seedling culture field to range from 15 DEG C to 30 DEG C; and removing the thin film covering the vallisneria natans seedlings, filling water into the seedling bed, keeping the seedlings in the seedling bed for 9 to 11 days and shifting the seedlings out of the seedling culture field to obtain the vallisneria natans seedlings. After the annual seedlings are transplanted in the seedling culture field for 48 to 52 days, plant heights of new vallisneria natans seedlings grown on underground stems can reach 10 centimeters. The method has the advantages that seasonal limitation on plantation of the vallisneria natans can be broken through, and shortcomings of high cost, long period, high operational requirements and the like of a tissue culture technology for the vallisneria natans can be overcome.

The invention discloses a river crab damage preventing method for planting vallisneria natans by bottoming a polyethylene mesh. Newly planted vallisneria natans is protected in a way of paving a polyethylene mesh with the mesh being about 1cm*1cm in a vallisneria natans planting region on a plate field at the bottom of a crab pond, and by using the method, clamping the vallisneria natans by the river crabs is stopped, and stolons of the vallisneria natans are favorably protected, so that the vallisneria natans can be effectively prevented from being damaged by the river crabs, the normal growth of float grass is guaranteed, and the method has important promotion effects on improving the ecological environment of the pond and improving the yield and quality of the river crabs.

The invention belongs to the field of water body ecological restoration, and particularly relates to a method for controlling eel grass surface attachments and moss. The method includes the followingstep of throwing bellamya in a water body where eel grass grows. The method does not use chemical medicament and plant medicament which have a negative impact on the ecology of the water body and doesnot adopt expensive engineering measures, but the method adopts an ecological control method according to unique ecological habits of bellamya and ecological principles, which have not any adverse effects on environment and are of great significance for maintaining the stability of submerged vegetation in a eutrophication water body.

The invention provides an ecological restoration method for lake oscillation water in a plain river network area. The ecological restoration method comprises the following steps: dividing a water area space into a shoal area, a transition area and a deep pool area according to a preset underwater elevation; according to the water body index data, judging key factors influencing the water quality in the shoal area and the transition area; according to a judgment result, respectively processing each subarea by adopting a mode of directly planting short eel grass or firstly carrying out turbidity reduction treatment and then planting the short eel grass; and then carrying out long-acting management and protection on the short vallisneria natans planted in the shoal area and the transition area. According to the method, the lake oscillation is subjected to zoning treatment, all the areas are treated in the mode including short vallisneria spiralis planting, long-acting management and protection are conducted on the short vallisneria spiralis in the later period, targeted zoning treatment is conducted on water ecological restoration of the lake oscillation, natural restoration of aquatic plants serves as the main body of restoration work, the later-period maintenance cost is low, and the method is worthy of popularization.

The invention provides a lawn for multi-stage interception and purification of particulates in a water body, and relates to the technical field of water ecological restoration. The lawn for multi-stage interception and purification of particulates in a water body comprises a suspension frame, a plurality of filter net bags made of degradable materials and connected to the suspension frame at intervals through connecting ropes made of degradable materials, a plurality of filter balls each contained in one filter net bag, and vallisneria natans seedlings; a spherical shell of each filter ball is made of hydrophilic polyurethane sponge, a plurality of through holes and a plurality of through grooves are uniformly distributed in the spherical shell of each filter ball, and the middle part of each filter ball is filled with a micro-electrolysis filler, a volcanic biological filter material and zeolite in a preset mass ratio; and multiple vallisneria natans seedlings are inserted into each through groove. According to the lawn capable of intercepting and purifying the particulates in the water body in the multi-stage manner, an underwater landscape can be constructed in the water body, suspended matter and colloidal substances in the water body are removed, chromophoric groups in colored dissolved organic matter in the water body are degraded, and the problem of water body pollution is solved.

The invention provides a young river crab fodder component and a preparation method thereof. The young river crab fodder component comprises the following raw materials in parts by weight: 8-20 parts of rice bran, 5-18 parts of bean cakes, 5-12 parts of silkworm chrysalis, 5-15 parts of sweet potato powder, 3-10 parts of potatoes, 3-8 parts of fish meal, 3-8 parts of lean meat powder, 3-8 parts of viviparidae powder, 2-6 parts of duckweed, 4-10 parts of vallisneria natans, 5-15 parts of mineral salt, 3-8 parts of green Chinese onion juice, 2-5 parts of eclosion hormone and 2-5 parts of a preservative. The young river crab fodder component has the following advantages: exuviation of young river crabs can be quickly realized, the soft shells of exuviated young river crabs can quickly grow into hard shells, the autoimmunity of young river crabs can be improved, the quick growth of young river crabs can be facilitated, and the situation that after growing up, young river crabs are delicious in meat and rich in nutrition is guaranteed.