151 results about "Hydrilla" patented technology

The invention discloses a system and method for treating rural sewage by using an ecological system based on multi-submerged plant combinations. From the water inlet to the water outlet, the system sequentially comprises three regions in a pond, wherein a submerged plant combination A, which comprises more than any two of hydrilla, waterweed, Najas minor, curly pondweed and bog pondweed, is planted in the first treatment region; a submerged plant combination B, which at least comprises Vallisneria spiralis and vallisneria spinulosa, is planted in the second treatment region; and a submerged plant combination C, which comprises more than any two of hydrilla, waterweed, Najas minor, Vallisneria spiralis, vallisneria spinulosa, curly pondweed, bog pondweed, watermilfoil and hornwort, is planted in the third treatment region. The system and method are simple to implement, have the advantages of low cost and favorable effect, and do not need additional pipe network engineering and land; and the effluent water can achieve Grade 1 A above in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. The system can be used as a natural landscape, and has the advantages of high transparency of the water body, high biodiversity and high ecological landscape value.

The invention belongs to the technical field of aquaculture and discloses a paddy field cultivation method for crayfish. The paddy field cultivation method is characterized by comprising the following steps of (1) paddy field preparation; (2) crayfish stocking; (3) feeding; and (4) breeding management, including the processes of (a) water quality control, (b) disease control, (c) overwintering management, and (d) catching of finished crayfish. The paddy field cultivation method for crayfish is aided by natural baits, such as hydrilla verticillata and living snails as foods for the crayfish, so that the breeding survival rate, nutrients and taste of the crayfish are improved; cyclic utilization of paddy field substances is achieved by adopting the natural bait of a paddy field ecosystem; and the breeding cost is also reduced.

The invention provides a method for recovery of submerged plant communities through submerged vegetation turf. The composite submerged vegetation turf is made and is transferred and implanted into ecological systems such as a river and a lake to be recovered. Young seedlings of submerged plants are cultivated in a paddling pool through a plant fiber blanket, the young seedlings are fast cultivated through submerged plant seeds, winter buds, broken branches and other propagules, two submerged plants are planted on each piece of turf, three types of turf of elodea nuttallii and potamogeton crispus, vallisneria spirals and hydrilla varticillata, and potamogeton maackianus and hydrilla varticillata are cultivated, the cultivated young seedlings and the plant fiber blanket are taken out of the pool in pieces during transplantation, the turf is formed, rolled into cylinders and transported to a target water region, and then the turf is placed at the bottom of water piece by piece and fixed through T-shaped fixing stickers. The method has the following advantages that the illumination, water depth and the nutrient conditions of the paddling pool can be controlled easily, the submerged plant turf is conveniently transported and planted on site, and on-site plant planting time is saved.

The invention discloses an extruded crucian feed, which is prepared from the following raw materials in parts by weight: 100-110 parts of soybean meal, 50-60 parts of maize meal, 20-25 parts of black rice meal, 5-6 parts of seeds of lobed kudzuvine, 4-5 parts of barley, 20-25 parts of raw duck albumen, 10-15 parts of lotus leaves, 0.1-0.2 part of lemon oil, 1-2 parts of ginger peel, 1-3 parts of glutinous rice roots, 4-5 parts of orange kernels, 10-12 parts of hydrilla powder, 4-5 parts of vitamin complex preparations, 5-6 parts of additives and an appropriate amount of water. The extruded crucian feed is simple in preparation method; the extruded crucian feed is prepared by using the soybean meal, maize meal and black rice meal as main raw materials and using the raw duck albumen, the lotus leaves and the hydrilla powder as auxiliary materials, so that the extruded crucian feed contains rich protein, vitamins and minerals, has comprehensive nutrition and good palatability, can effectively enhance the disease resistance of crucian, improve the growth speed of the crucian and has good culture benefits.

The invention relates to environment protection material. Natural multi-purpose environmental protection material with functions of moisturizing, dust prevention, heat preservation and weed eradication is characterized in that the material is made from raw materials of plant material powder, filling material, reticular fiber, foaming agent, binding agent, humectant and vegetable oil, and prepared into s block shape; The occupying mass percent of the raw materials is as follows: 50-65 percent of plant material powder, 10-15 percent of reticular fiber, 5-10 percent of foaming agent, 5-10 percent of binding agent, 5-10 percent of humectant, and 0.5-1 percent of vegetable oil; the plant material powder is admixture of one or two of straw, caving, leaf, tree branch, bark, bamboo, vine, bulrush, aquatic grass, pygmy water lily, water fern, nuphar pumilum, singharanut, lotus flower, loosestrife, common snapdragon, waterweed and hydrilla verticillata which are smashed into powder, and when the plant material powder is admixture of more than any two, the compounding ratio is the non critical ratio; the filling material adopts pulverized fuel ash and clay. The invention has the advantages of low cost, moisturizing, dust prevention, and weed eradication.

The invention relates to the technical field of aquaculture, and specifically relates to a grass carp feed. The feed is prepared by the following raw materials by weight: 18-20 parts of peanut bran, 35-40 parts of corn flour, 15-18 parts of fried soybean meal, 12-15 parts of rapeseed dregs, 2-3 parts of meat and bone meal, 6-8 parts of hydrilla verticillata meal, 10-12 parts of bean dregs, 10-12 parts of rice bran, 6-8 parts of fried peanut meal, 6-8 parts of pumpkin flowers, 8-10 parts of fennel tender leaves, a proper amount of salt and 4-5 parts of a phagostimulant. The prepared grass carp feed is developed from feeding habits of the grass carp. Fresh and tender plant raw materials such as the pumpkin flowers and the fennel tender leaves are added, so that palatability of the feed is improved. Meanwhile, raw materials such as the fried peanut meal and the bean dregs supplement nutrients of the basic feed. The feed is balanced in nutrition. After the feed is taken by the grass carp, the growth of the grass carp is good and survival rate is increased.

The invention discloses a method for continuously cropping and ecologically breeding macrobrachium nipponensis and hydrilla verticillata. The method is used for breeding the macrobrachium nipponensis by means of continuously cropping the macrobrachium nipponensis and the hydrilla verticillata. The method has the advantages that eutrophic substances and harmful substances such as residual feed and feces in ponds can be converted by the hydrilla verticillata owing to a technical mode for ecologically and continuously cropping the macrobrachium nipponensis and the hydrilla verticillata, and a characteristic of strongly inhibiting generation of some algae of the hydrilla verticillata is sufficiently utilized, so that purposes of purifying breeding water and ecologically breeding the macrobrachium nipponensis can be achieved; breeding byproducts such as ammonia nitrogen and nitrite in bottom sediments of the ponds can be consumed by means of planting the hydrilla verticillata, effects of purifying the bottom sediments and maintaining excellent ecological environments of the ponds can be realized, the macrobrachium nipponensis is in the suitable ecological environments of the ponds in total breeding procedures, suitable habitat environments and palatable green feed are provided for growth of the macrobrachium nipponensis by the hydrilla verticillata, the bred macrobrachium nipponensis is high in yield and good in quality, and the price of the macrobrachium nipponensis can be increased; spores and grass seeds of the hydrilla verticillata can be offered for sale, so that an extra economical benefit can be created.

The invention relates to the field of feed for livestock and poultry and in particular relates to a laying hen feed for improving egg yield. The feed is prepared from the following raw materials in percentage by weight: 50-60 parts of barley malt root, 80-90 parts of oat powder, 160-180 parts of maize meal, 65-75 parts of corn germ, 50-60 parts of walnut kernel meal, 45-60 parts of wood cottonseed meal, 45-50 parts of bean cake, 40-50 parts of rapeseed protein, 4-5 parts of synanthrin, 2-3 parts of pineapple juice, 2-3 parts of hydrilla powder, 2-3 parts of choline chloride, 2-3 parts of duck blood meal, 2-3 parts of shell powder, 4-5 parts of water spinach, 2-3 parts of imported cabbageworm powder, 1-2 parts of bone meal, 0.5-1 part of beef tallow, 2-3 parts of fermented blank bean, 4-5 parts of buckwheat leaf and 4-5 parts of a phagostimulant. The hydrilla powder, the choline chloride, the duck blood meal, the shell powder, the imported cabbageworm powder, the bone meal, the fermented blank bean and other components containing rich amino acids, multiple vitamins, calcium, phosphorus and other mineral elements are added on the basis of a basal feed, so that nutrition supply of the laying hens during the egg producing period is met, and the egg yield of the laying hens is improved.

The invention discloses a loach feed. The feed consists of the following components in parts by weight: 15-20 parts of shrimp meal, 6-9 parts of tubificidae meal, 10-15 parts of white ant meal, 4-6 parts of mosquito meal, 6-9 parts of silkworm chrysalis meal, 3-6 parts of swine blood meal, 6-8 parts of hydrilla varticillata powder, 20-30 parts of soybean meal, 15-20 parts of peanut meal, 5-10 parts of rice bran, 5-8 parts of potato residue, 6-7 parts of soybean residue, 6-9 parts of eel grass leaves, 4-6 parts of alligator weed leaves, 5-8 parts of carrot roots, 5-9 parts of rice roots, 1-2 parts of antibiotics, 4-6 parts of baikal skullcap root-coptis root-amur corktree bark powder, 3-5 parts of vitamin C and a proper amount of table salt. The loach feed is an ecological and environment-friendly fish feed. By feeding loach with the feed, the disease resistance of loach is improved remarkably, the survival rate is increased greatly, the breeding speed is increased, and meanwhile, the yield is increased.

The invention provides a system and method for improving black and odorous riverway water quality through micro-aeration and submerged plants. Black and odorous riverway contaminated bottom silt is improved through bottom layer micro-aeration, release of contaminants of the bottom silt is controlled, growth of the submerged plants is assisted, and ammonia nitrogen is reduced. Meanwhile, according to the seasonal change of the plants, evergreen submerged vegetation is established through an elodea nuttallii-eel grass combination, accompanying species of ceratophyllum demersum, myriophyllum spicatum and hydrilla varticillata are planted in an assisted mode, the stable submerged vegetation is established, and the purpose of improving the riverway water quality is achieved. The problem that the transparency is low in the initial stage of a black and odorous riverway water quality improvement project is solved through a floating bed capable of ascending and descending through introduction of the submerged plants. The probability of establishment of the specific submerged vegetation in a black and odorous riverway is verified, water quality improvement is remarkable, operation is easy, the project amount is small, and the system and method are economical and practical.

The invention discloses a mixed culture method for fishes, prawns and crabs in a reed zone ditch. The mixed culture method includes the steps: dredging the ditch; setting gentle slopes; respectively setting a plurality of pairs of floating baskets along two banks of the ditch; planting Vallisneria natans, Elodea nuttallii and Hydrilla varticillata in shallow water zones with the floating baskets close to the banks to culture the prawns and the crabs; and planting Alternanthera philoxeroides in deep water zones with the floating baskets. The fishes are cultured between paired floating baskets. The Vallisneria natans, the Hydrilla varticillata and the Elodea nuttallii can effectively purify water, improve the ditch and serve as baits of the prawns and the crabs, the Alternanthera philoxeroides are clustered in summer to provide a protection place for shelling of the prawns and the crabs, the fishes, the prawns and the crabs are effectively isolated by the Alternanthera philoxeroides, and harm of the fishes and other natural enemies is prevented.

The invention discloses a method for efficient removal of heavy metals in farmland irrigation water by a plant pond, a constructed wetland and an adsorption tank. The method is mainly characterized in that farmland in which natural water inlet and outlet can be realized by difference of elevation is selected according to farmland irrigation ditch distribution conditions to form a 'plant pond, constructed wetland and adsorption tank' integrated purification process, aquatic plants such as typha and hydrilla are planted in the plant pond and the constructed wetland, and the adsorption tank is filled with industrial and agricultural wastes such as straws high in heavy metal adsorption capacity to purify heavy metal pollution in the farmland irrigation water. The aquatic plants can not only prevent short circuit of water flow but also improve purification efficiency; the adsorption tank can further improve purification efficiency to guarantee that heavy metals in the farmland irrigation water reach the standard. By adoption of the method, heavy metal pollution in the farmland irrigation water can be efficiently eliminated while pollution of N, P and the like can be cleared, and the heavy metal content of the farmland irrigation water can reach the standard all year round.

The invention provides a method for reducing heavy metals in river-going overland runoff by aquatic plant matched growth, belonging to the technical field of heavy-metal-polluted river course restoration. According to the method, emerging plants calamus and reed, submerged plants Potamogeton pusillus, hydrilla, curly pondweed and watermilfoil, and floating plant common waaterrthacinth are grown from the riverbank to the river center. The growth density of the emerging plants is 10-20 plants / m<2>, and the growth proportion of the calamus and reed is 1:(1-3); the growth density of the submerged plants is 30-50 clumps / m<2>, and the growth proportion of the Potamogeton pusillus, hydrilla, curly pondweed and watermilfoil is 1:(1-2):(3-5):(1-2); and the growth density of the floating plant common waaterrthacinth is 10-20 plants / m<2>. The plant growth process is utilized to absorb and enrich heavy metal ions in water, thereby achieving the goal of restoring the river-going multi-heavy-metal combined pollution river course. The method has the advantages of small secondary pollution, simple restoration process, low cost and the like, and can maintain the balance of the ecological system in water. The method for treating the polluted river course has environmental value, ecological value and ornamental value.

The invention discloses a preparation method, a product and application of a soil remediating active organic fertilizer. The preparation method provided by the invention comprises the following steps: hydrolyzing caked dregs by using an enzyme to obtain the caked dregs containing active free amido acids, and then carrying out mixed fermentation on hydrilla soil, yellow bran, shell powder, bone meal, shrimp and crab shell meal by use of ferment bacteria to obtain organic fermented materials; finally, blending the caked dregs containing the active free amido acids with the organic fermented materials and adding a soil enzyme, thereby obtaining the active organic fertilizer for soil remediation which is up to the national microbial fertilizer standards. The soil remediating active organic fertilizer provided by the invention is capable of improving the fertilizer utilization rate and the percent conversion of crop nutrients; according to practices, the utilization rate of the fertilizer can be increased by 1.5-1.8 times, and therefore, the effects of over production, quality improvement, yield increase and good harvest can be achieved. Importantly, the product of the preparation method provided by the invention is capable of effectively improving the soil hardening condition, recovering the gas-solid-liquid ratio of the arable soil, forming the granular structure, improving the water retention capacity, proliferating the beneficial bacteria and activating soil.

The invention relates to an ecological aquaculture method of high quality Chinese mitten crabs and belongs to the technical field of aquaculture. The method comprises the steps that a pond is selected, cleaned, prepared and sterilized; from February to March in early spring, aquatic plants are planted, a '2+2' composite aquatic plant planting mode is adopted for aquatic plant planting, waterweed and potamogeton maackianus are used as main plants, and wild celery and hydrilla varticillata are used as auxiliary plants; young crabs are put; when the water temperature of the pond reaches above 10DEG C, feed starts to be put; from May to June, siniperca chuatsi and incubation freshwater shrimps are put into the pond; before the Qingming festival, snails start to be put into the pond; during daily management, the change of the water quality is observed, the water quality is adjusted, facilities are overhauled, and pests are removed in good time. According to the method, the aquaculture yield and specification of adult crabs are decided through the reasonable aquaculture density and breeding specification. 800 crabs are bred per mu, about 600 adult crabs are harvested per mu, the large-scale and high-quality brand crabs are bred through a '863' mode with output value of 30,000 yuan pre mu, and the method is an ecological aquaculture mode worthy of copying and popularization.

The invention relates to the technical field of feeds, and in particular relates to a feed for improving the growth property of goose for meat. The feed is prepared from the following raw materials in percentage by weight: 65-75% of yellow corns, 15-18% of wheat bran, 10-12% of dry straw, 12-15% of semen juglandis pulp, 10-12% of bean pulp, 2-3% of hydrilla powder, 3-4% of calendula, 1-2% of limestone, 2-3% of fish meal, 2-3% of fishbone dust, 4-5% of timothy grass, 3-4% of lettuce leaf, 2-3% of Chinese chive seeds, 2-3% of dry herring meal, 4-5% of corn leaf, a proper amount of salt and 0.2-0.5% of phagostimulant. The feed for goose for meat is rich in variety of the raw materials, sufficient in nutrition and capable of effectively improving the growth property of the goose for meat and improving the quality of the goose for meat as the raw materials such as algae powder and calendula are rich in amino acids, vitamins and various microelements.

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.

The invention discloses a rice and lobster co-cultivation method. By establishing a rice and lobster ecological co-cultivation system, through feeding activities of crayfishes, cooperated with the application of solar insect seducing insecticidal lamps, weeds and rice pests and diseases of rice fields are greatly reduced, the dosages of insecticides and pesticides are reduced, and rice flowers inthe flowering period can also be eaten by the crayfishes. The method also uses natural bait waterweed, tape grass, hydrilla verticillata and live snails as the food of the crayfishes, and improves thenutrient content of the crayfish, the taste and the nutrient components of the crayfishes are improved, the breeding cost is low, and natural baits of a rice field ecosystem and micro-ecological fodders are used for achieving the recycling of rice field materials, thereby not causing environmental pollution of an aquaculture water body.

The invention relates to a method for fast propagating hydrilla varticillata through tissue culture, comprising the following steps of: (1) collecting stem segments of the hydrilla varticillata; (2) detoxifying: detoxifying the stem segments of the hydrilla varticillata; (3) performing induced culture: inoculating the stem segments of the hydrilla varticillata into an induction culture medium for the induced culture so as to obtain adventitious buds of the hydrilla varticillata; (4) performing propagation culture: inoculating the adventitious buds of the hydrilla varticillata onto a propagation culture medium for the propagation culture so as to further culture a large quantity of the adventitious buds; (5) performing rooting culture: inoculating the adventitious buds obtained through the propagation culture onto a rooting culture medium for the rooting culture; and (6) opening a culture bottle of the hydrilla varticillata with root hairs, which is subjected to the rooting culture, placing under an indoor natural condition for seedling domestication, taking out tissue culture seedlings inside the culture bottle, cleaning, and transplanting into a pond for culture. The method provided by the invention meets the demands of ecological water body restoration and purification, fishery culture, organic fertilizer composting, and the like and can be used for sustainably and massively supplying the tissue culture seedlings of the hydrilla varticillata all the year round.

The invention relates to the technical field of culturing of special fish and particularly relates to a pond culture method for Mastacembelus armatus. The method is characterized by adopting a Mastacembelus armatus-crucian carp-Hydrilla verticillata ecological culture mode and comprising the specific culture steps of selecting culture ponds, treating the culture ponds, carrying out feedstuff feeding and carrying out water quality regulation and control and disease control. The method is a bran-new ecological culture mode for developing Mastacembelus armatus culture. Fly maggots and tenebrio molitor are used for feeding the Mastacembelus armatus, excrement of the Mastacembelus armatus, remaining and dead fly maggots and the like are eaten by underlaid crucian carp, excrement of the crucian carp and Mastacembelus armatus supplies adequate nutrients to aquatic plants such as Hydrilla verticillata and Eichhornia crassipes, and the Hydrilla verticillata and the Eichhornia crassipes purify water and generate a large volume of oxygen gas through photosynthesis so as to supply adequate dissolved oxygen to the water, so that the growth of the Mastacembelus armatus and the crucian carp is facilitated; and the Hydrilla verticillata and the Eichhornia crassipes can also serve as high-quality green fodder for fishes and pigs, so that a positive cycle for the Mastacembelus armatus, the crucian carp and weeds is achieved, and a good ecological system is established.

The invention discloses a method for regulating and controlling the water plants of a crab culture pond, and relates to the field of water quality purification. The method comprises the following steps of silt removal and pond arrangement; pond cleaning and airing; planting of water plants; feeding of juvenile crabs, and management of the water plants; observing of water quality conditions. The method has the advantages that on the basis of the ecological culture of a river crab pond, the quantity of hydrilla varticillata is regulated and controlled by adjusting the feeding quantity of feed, and utilizing the eating condition of river crabs; the artificial regulation and control is combined with the biological self regulation and control, so that the growth of the water plants is controlled, the water quality is regulated and controlled, the cost is reduced, the feeding cost of the feed is certainly reduced, and the economic benefit is improved.

The invention discloses a high-nutrient dietary-fiber feed for duck and a preparation method thereof, belonging to the technical field of feeds. The high-nutrient dietary-fiber feed is prepared from the following raw materials by weight: 65 to 75 parts of brown rice, 30 to 40 parts of rice bran, 15 to 25 parts of wheat bran, 8 to 13 parts of soybean oil meal, 6 to 14 parts of dried earthworm, 2 to 11 parts of fish meal, 4 to 8 parts of dried straw, 3 to 9 parts of corn germ meal, 1 to 7 parts of hydrilla powder, 2 to 8 parts of powder of Nymphoides peltatum, 5 to 13 parts of powder of shepherd's purse, 7 to 13 parts of purslane, 1 to 6 parts of soybean oil, 2 to 6 parts of a traditional Chinese medicine additive, 0.4 to 1.2 parts of calcium hydrogen phosphate, 1 to 3 parts of a vitamin additive, 0.6 to 1.5 parts of salt and a proper amount of water. Compared with traditional feeds, the invention has the following advantages: the feed comprises traditional Chinese medicinal components, and through mutual cooperation between the traditional Chinese medicine additive and a feed carrier, the feed can guarantee normal nutritional demands of duck, prevent and treat diseases, enhance immunity of duck and promote healthy growth of duck, has no toxic and side effects, does not incur drug resistance and enables duck meat to be more favorable for human health.

The invention discloses a traditional Chinese herbal medicine-containing goldfish feed and a preparation method thereof. The traditional Chinese herbal medicine-containing goldfish feed consists of the following raw materials in parts by weight: 30 to 40 parts of rice bran, 15 to 20 parts of soybeans, 10 to 20 parts of corn cake, 10 to 20 parts of wheat bran, 5 to 10 parts of salt-cured meat, 4 to 6 parts of chicken intestine, 3 to 5 parts of snail meat, 3 to 5 parts of clam, 2 to 4 parts of tubificidae, 5 to 6 parts of rice roots, 3 to 4 parts of wild celery, 2 to 4 parts of hydrilla, 3 to 5 parts of alternanthera philoxeroides leaves, 2 to 4 parts of motherwort, 2 to 3 parts of houttuynia cordata, 1 to 2 parts of codonopsis pilosula, 1 to 3 parts of vitamin C and 5 to 7 parts of a nutrient; according to the feed disclosed by the invention, the nutrition arrangement is reasonable; a plurality of natural plants are used as the raw materials; in addition, the traditional Chinese herbal medicines, such as wild celery, houttuynia cordat and codonopsis pilosula are added, so that the digestive system of a goldfish can be improved, the removal of toxin of the goldfish can be promoted; the traditional Chinese medicinal components are matched, so that the autoimmunity of the goldfish is improved, and the diseases of the goldfish are prevented.

The invention discloses a high-yield culture method for improving immunity of freshwater shrimps in summer. The method comprises the steps that a pond free of sludge at the bottom is selected, after pond water is pumped out in late June, the pond is insolated, and then quick lime is evenly scattered to the bottom of the pond; after water is injected in the first ten days of July, hydrilla varticillata is evenly scattered and planted in the bottom of the pond, then alternanthera philoxeroides is planted in the shallow water zone of the pond, and water is injected; then a summer flower net is arranged in the middle of the pond; young shrimps are put in the pond on a sunny morning in the last ten days of July, and then chubs are put in the pond; after the freshwater shrimps are put in the pond, the freshwater shrimps are fed with fine pellet feed once in the morning and afternoon every day; after a period of time, the freshwater shrimps are fed with rough pellet feed once in the morning and afternoon every day; quick lime and a copper sulfate water solution is put in the pond every other a period of time; from late August to fishing, the pond bottom water is pumped once every day, then a fresh water source is supplemented to the water level which is not lowered, and meanwhile air is pumped into the pond regularly every day; after the freshwater shrimps are put in the pond for a period of time, the freshwater shrimps are fished on a cloudy afternoon.

The invention relates to the field of water quality purification and particularly relates to a biological repairing method of surface water. A water body is purified by combined planting of floating-leaved plants, submerged plants and emergent aquatic plants, wherein the floating-leaved plants include myriophyllum aquaticum, water poppy and water lily; the submerged plants include hydrilla varticillata; and the emergent aquatic plants include papyrus, rushes, clinopodium urticifolium, reeds, canna, Brazilian pennywort, scirpus tabernaemontani, pontederia cordata, cattail, fleur-de-lis, thalia dealbata and rhizoma calami. According to the biological repairing method of surface water provided by the invention, the water body is purified by combined planting of floating-leaved plants, submerged plants and emergent aquatic plants and the polluted water can be purified by the combined actions of precipitation and filtration of aquatic plants and roots of the plants. The water is remarkably clearer than water before the plants are planted. A part of detection indexes of the polluted water source are converted into standard water quality within 2 months. All indexes substantially meet the standard within a half year. The method is short in purifying time, good in purifying effect and stable in purifying effect.

The invention relates to the field of grass carp feeding, in particular to a breeding method for grass carp fingerlings. The method comprises the following steps: planting waterweeds in a cultivation pond for breeding the grass carp fingerlings, wherein the waterweeds comprise eel grass, hornwort and hydrilla varticillata; feeding fries in the cultivation pond with baits until the fries grow into the grass carp fingerlings. The breeding method for the grass carp fingerlings, provided by the invention, has the advantages that by planting the three waterweeds namely the eel grass, the hornwort and the hydrilla varticillata in the cultivation pond, the waterweeds interact with the grass carp fries in the growth process, the bred grass carp fingerlings are good in physique and exuberant in vitality, and the liver and gall syndrome cannot be caused in the growth process and the subsequent cultivation process.

The invention discloses a pea crab feed. The feed comprise, by weight, 12-18 parts of Potamogeton maackianus, 22-25 parts of Eichhornia crassipes, 30-36 parts of Hydrilla varticillata, 15-18 parts of shell powder, 25-28 parts of tenebrio molitor, 18-21 parts of bean weevil, 55-58 parts of minced fish flesh, 5-8 parts of cuttlefish powder, 12-15 parts of freshwater mussel meat, 10-15 parts of sea-tangle powder, 60-65 parts of soybean meal, 5-8 parts of straw residues, 19-22 parts of rice bran, 15-18 parts of potato flour, 6-12 parts of bread flour, 6-10 parts of taurine, 15-20 parts of chitosan, 5-8 parts of beta-ecdysone, 10-15 parts of antibacterial peptides, 4-6 parts of Radix Astragali polysaccharides, 8-10 parts of hyaluronic acid, 12-18 parts of ascorbic acid lecithin, 9-12 parts of sodium humate, 3-4 parts of cholesterols, 15-20 parts of Maifan stone powder, 16-18 parts of vinegar residue powder, 13-16 parts of traditional Chinese medicine powder, 7-10 parts of composite amino acids, 5-6 parts of a composite bacterium preparation, 3-6 parts of vitamin C and 4-7 parts of vitamin E.

The invention discloses a water ecological restoration system; an upper frame and lower frame of the system are connected through connection rods arranged on two sides; floats are mounted on the upper frame, and flexible solar panels are arranged on the floats; the upper frame is provided with plastic planting areas, the bottom of each planting cell of the plastic planting areas is provided with a plurality of seepage holes; a light passage is formed between every two adjacent plastic planting areas along the length of the upper frame; a plurality of propellers are arranged at one end of the upper frame in its width direction on a support, and stirring devices are mounted on the supports in the middle of the upper frame; all the stirring devices, the propellers and the flexible solar panels are connected to a battery pack on a mounting platform on the upper frame; a floating matter remover is arranged on the upper frame; a plastic planting plate is arranged on the lower frame, and Hydrilla verticillata, Elodea nuttallii, Potamogeton pectinatus and / or Dendrobium lohohense are planted in planting holes of the plastic mounting plate; a plastic retaining plate is mounted in every two adjacent retaining grooves.

The invention discloses a degraded lake restoration method which comprises the following steps: building an artificial wetland surround a degraded lake; establishing aquatic plants along the bank of the degraded lake, wherein the aquatic plants adopt one or any combination of lotus, reed, cattail, calamus, banana-plant, water chestnut, gorgon fruit, canna, pontederia cordata, Chinese pennisetum, scirpoides holoschoenus, rhizoma alismatis, ottelia acuminate, tape grass, hornwort, ottelia alismoides, hydrilla and duckweed; adding a flocculating agent into the degraded lake, wherein the adding amount of the flocculating agent is 20 to 300 g per cubic meter, the flocculating agent comprises polymeric silicate, polyaluminium chloride and polyaluminium sulfate, and the mass ratio of the polymeric silicate to the polyaluminium chloride to the polyaluminium sulfate is (0.5-2):(1-20):(1-20); putting microbial agents in the degraded lake, wherein eutrophic water-resistant animals are bred in the water. By the degraded lake restoration method, the degraded lake can be ecological restored effectively. The dissolved oxygen content of the degraded lake is obviously increased, and the chemical oxygen demand, the ammonia nitrogen content, the total phosphorus content and the total nitrogen content are obviously reduced.

The invention discloses a domesticated tortoise feed and a preparation method thereof. The domesticated tortoise feed is prepared from the following raw materials in parts by weight: 30-40 parts of rice bran, 15-20 parts of soybean, 10-20 parts of johnnycake, 10-20 parts of wheat bran, 5-10 parts of bacon, 4-6 parts of chicken intestine, 3-5 parts of snail meat, 3-5 parts of freshwater mussel, 2-4 parts of water earthworm, 5-6 parts of rice root, 3-4 parts of eel grass, 2-4 parts of hydrilla, 3-5 parts of leaves of alternanthera philoxeroides, 2-4 parts of motherwort, 2-3 parts of houttuynia cordata, 1-2 parts of codonopsis pilosula, 1-3 parts of vitamin C and 5-7 parts of a nutritional agent. The domesticated tortoise feed is reasonable in nutrition arrangement, multiple natural plants are taken as raw materials, and Chinese herbal medicines such as motherwort, houttuynia cordata and codonopsis pilosula are added, so that disease resistance of tortoise is improved, and environmental adaptability of the tortoise is also improved.