82 results about "Charales" patented technology

The invention belongs to the technical field of aquaculture, and relates to a method for increasing transportation survival rate of summer freshwater shrimp larvae. The method comprises the steps that 1, water is added into a water tank, the demand water of the water tank is determined according to the transport quantity of the shrimp larvae, deep well water is added into the water tank to reach half of the demand water firstly, and then water of an original pond of the shrimp larvae is added to reach half of the demand water to be mixed with the added deep well water; 2, Vc is added, Vc for aquatic products is added into the water tank; 3, oxygen aeration is conducted, and oxygen is added into the water tank; 4, shrimp larva putting is conducted, and the shrimp larvae are put into the water tank. The character that the deep well water is homothermal is adopted, the water temperature of the water tank in high temperature season is far lower than that of the pond, the deep well water is added into the water tank to reach half of the demand water, the water temperature of the water tank can be effectively decreased, the temperature difference is not too large, the pond water is added to reach half of the demand water, and a buffering function on the quality of the water in the water tank can be achieved. Vc can effectively reduce stress reaction of the shrimp larvae and increase the survival rate of the shrimp larvae after the shrimp larvae are transported and enter the pond. An oxygen cylinder is used for adding the oxygen, on one hand, the pure oxygen adding effect is obvious; on the other hand, the temperature of the pure oxygen is constant, and the temperature of the water in the water tank can be kept stable.

The invention discloses a prevention and control method for green algae in a seawater pond based on a physical shading layer. According to the method, a physical shading layer taking a black shading net as a matrix is constructed on the lower layer of a water body in the larva stage of the green algae in the pond mainly according to the life history characteristics of the green algae in the pond,and the vigorous growth of the green algae in the seawater pond is prevented and controlled by blocking light energy supply.

A repairing agent disclosed by the invention takes natural minerals as main components, is used after being dissolved in water, is convenient to operate, and is environment-friendly without generatingsecondary pollution after being used. When a water body prone to outbreak blue-green algae is treated, the transparency of the water body can be rapidly improved; blue-green algae in the water body are precipitated into bottom sludge through adsorption and flocculation, meanwhile, the concentration of total phosphorus in the water body is reduced, and growth and propagation of the blue-green algae are inhibited. The clay is an aggregate of clay minerals, has a unique crystal layer overlapped structure, and has the characteristics of rich resources, low price and the like. The natural mineralrepairing agent is prepared by cationic modification of the original clay, so that the inhibition effect of the blue-green algae is improved. Compared with aluminum polychlorid used at present, the repairing agent is low in price and better in effect. Coconut shell activated carbon is low in price, and the cost is increased while the effect of the repairing agent is improved.

The invention discloses a three-dimensional temporary cultivation device for long-distance transportation and relay cultivation of coral larvae and broken branches. The three-dimensional temporary cultivation device comprises a water-containing box body fixedly arranged on a deck of a transportation ship, wherein a cover plate for controlling the illumination intensity inside the box body is arranged on the top of the box body; a plurality of fixed hanging carrying frames arranged at fixed intervals are arranged at the bottom inside the box body; a plurality of hanging holes are formed in eachhanging carrying frame; a plurality of upwards extending hanging elements used for accommodating the coral larvae or broken branches are arranged on the hanging holes; and water inlet holes and wateroverflow holes used for water circulation inside the box body are arranged in the box body. The three-dimensional temporary cultivation device for long-distance transportation and relay cultivation of coral larvae and broken branches has the advantages that the hanging carrying quantity of corals is great; the moving and dissociation of the corals are convenient; large-scale operation on the shipor in the field is convenient; no damage can be caused on the corals; the coral loss in the transportation period can be effectively reduced; the survival rate is improved; the three-dimensional temporary cultivation device can also be used for laboratory or shore-based medium-or-short-term coral cultivation; and the design structure and the manufacturing material have the characteristics of adjustable inside space, high utilization rate, marine transportation applicability, high structural intensity, impact resistance, corrosion resistance and the like.

The present invention discloses a method for rapid colonization of rigid underwater aquatic plants. The method comprises a bionic tank body, a composite culture medium and pre-cultured aquatic plants.The method is as follows: uniformly mixing seeds of the pre-cultured aquatic plants and the composite culture medium; filling the mixture in the bionic tank body after the uniform mixing, then placing the bionic tank body in an incubator, adding water for submerge for pre-culture with submersion not exceeding 10 cm; and after 2-3 weeks of the pre-culture and seedlings of the pre-cultured aquaticplants emerge from a tank mouth for 3-5 cm, draining water in an incubation box body, and transferring the bionic tank to a ship and driving the ship to a rigid base water area to be repaired. Beneficial effects are as follows: the method has high-efficiency bottom attachment, rapid colonization of the aquatic plants, simple and rapid implementation, low operating cost, and convenient large-scalepromotion, greatly improves efficiency of improvement of rigid underwater substrate habitat and rapid establishment of the aquatic plants, and is very suitable for reconstruction of the aquatic plants, landscape optimization and rapid and efficient restoration of aquatic ecosystems in rigid underwater, fine gravel riverways and highly polluted sediment water bodies..

The invention discloses a comprehensive filamentous alga prevention and control method for an intermediate culture key technique of tridacnidae young shellfishes. The method comprises the following steps: (1) carrying out light-shading culture in a culture stage of the tridacnidae young shellfishes by virtue of purple blue light-transmission corrugated tiles, wherein the wavelength of light is controlled during the culture, and the illumination intensity range is 6000Lux-15000Lux; (2) maintaining seawater for culturing the tridacnidae young shellfishes at normal salinity and temperature, maintaining KH of a seawater body at 8-10, and maintaining pH of the seawater body at 8.0-8.5; (3) adding denitrifying bacteria and bacillus into the seawater at a fixed period of one week; and (4) when finding that brown or green spot algae occur in a culture pool and have the trend of expanding day by day, adding dried Chinese lobelia herb into the culture pool, if dead organisms are found, timely picking out the dead organisms, and carrying out proper processing. According to the comprehensive filamentous alga prevention and control method, break-out of filamentous algae can be effectively inhibited, so that the success rate of intermediate culture of the tridacnidae young shellfishes is remarkably increased; and the comprehensive filamentous alga prevention and control method has multiple characteristics of relatively low cost, good effect, easiness in execution and the like.

The invention relates to an artificial leech breeding technique which is characterized in that a water inlet and a water outlet are formed in opposite corners of a culture pond, stones and tree twigs on which leaches inhabit are put at the bottom of the culture pond, preferably 500 kg of whifmania pigras for artificial breeding are fed into each mu of the pond, the leaches mainly take blood of snails, clams, frogs, turtles, earthworms and mammals, various blood-mixed feed, grass powder or even manure can be adopted for artificial breeding, about 30 kg of alive snails can be fed into each mu of the pond at one time, as the artificial breeding density is high, the water needs to be kept clean, a certain dissolved oxygen amount needs to be ensured, water needs to be appropriately replaced when the temperature of water is high in summer, the leaches are rapid to reproduce and high in regenerative capacity, the last ten-day of April and the middle ten-day of June are the egg laying period, the eggs of the artificially bred leaches are laid in soil in water near a breeding pond platform, a quiet environment shall be provided during the egg laying period, people shall walk on the banks as less as possible, and after being laid, the eggs of the leaches are dug out for artificial incubation, and then the leaches can be captured and processed.

The invention belongs to the technical field of symbiotic cultivation of medicinal fungi, and particularly relates to an integrated cultivation method for polyporus umbellatus and gastrodia elata. According to the integrated cultivation method, a cultivation pond with large depth is employed; the polyporus umbellatus is cultivated at the bottom part for 5-6 layers, and the gastrodia elata is cultivated at the uppermost layer, and thus, land resources are fully and effectively utilized, integrated cultivation of the polyporus umbellatus and gastrodia elata is realized, and synchronous improvement of yield per unit area and the production value is realized. The method of the invention has the characteristics of convenient operation, high yield and high efficiency.

The invention discloses an ecological revetment and aquatic plant coupled river channel restoration method which is characterized by comprising the following steps: arranging a wood-like pile revetment at the upstream of a river channel along the water flow direction of the river channel, arranging an ecological gabion revetment at the midstream of the river channel, and arranging a grass-planting brick revetment at the downstream of the river channel. Submerged plants, emergent aquatic plants and floating plants are alternately arranged on the upstream, the midstream and the downstream respectively. According to the method, a foundation is laid for field planting of aquatic plants through configuration and use of the ecological revetment; and the diversity of microorganisms in the river channel is improved through combined planting of aquatic plants. The method is suitable for tail-end treatment of a low-pollution-level water body or tail water purification of a sewage treatment plant, is also suitable for restoring a damaged water body of an ecological system, rebuilding a healthy aquatic ecological system and strengthening main functions of the water body ecological system, and has the advantages of being good in adaptability to water flow changes and seasonal changes, high in pollution resistance and pollutant removal capacity. And the construction quality is easy to control, and management and maintenance are convenient.

The invention relates to a method for quickly and continuously culturing enteromorpha prolifera, and belongs to in the technical field of artificial culture of marine algae. The method for quickly andcontinuously culturing the enteromorpha prolifera comprises the following steps of 1, sampling enteromorpha prolifera algae, cutting the enteromorpha prolifera algae into the sections, and inducing the enteromorpha prolifera to mature by strong light; 2, releasing and collecting germ cells; 3, culturing germ cell; 4, carrying out enlarged culture; and step 5, repeating the step 1 to the step 4. According to the method for quickly and continuously culturing the enteromorpha prolifera, enteromorpha prolifera adults can be cultured in batches within 4-5 weeks, and the average yield of the enteromorpha prolifera can reach 500-700g/L. Therefore, the method has the characteristics of short production period, high stability of the culture method, high controllability and high production efficiency.

The invention relates to the related fields of marine zoology, fishery resource science, marine animal ecology, aquatic animal protection science, fishery resource investigation and evaluation, marine environment ecology and the like, and establishes a quantitative evaluation method for influence of outbreak jellyfish population fluctuation on fishery resource risk. Namely, an index-competitive dominance index CAI representing the abnormal fluctuation intensity of the outbreak jellyfish population is introduced. According to the index, quantitative evaluation is carried out on fishery resource risk influence by evaluating the competitive dominance degree of the outbreak jellyfish population in the fishery resource community. The method fills up the blank of a quantitative evaluation method for the risk influence degree of the fishery resources caused by abnormal fluctuation of the outbreak jellyfish population, and has the characteristics of convenience and rapidness in operation and high feasibility.

The invention discloses an artificial wetland system suitable for artificial restoration of aquatic fireflies and a construction method. The artificial wetland system comprises an aquatic area and a terrestrial area which are separated by a water line, wherein the water bottom of the aquatic area and the terrestrial area form a side slope with the gradient smaller than 45 degrees; the water body depth of the aquatic area is not larger than 30 cm, and the average water body flow velocity is not higher than 30 cm/s; and a water level adjusting structure used for adjusting the water depth of the aquatic area is arranged in the terrestrial area and/or the aquatic area. According to the invention, a land and water environment required by survival and reproduction of the aquatic fireflies is constructed, the climbing slope design requirement of the aquatic fireflies is given according to the pupation characteristic of the fireflies, and the water depth and flow velocity of an aquatic area are controlled, so that an ecological environment suitable for survival and reproduction of the firefly larvae is created; and particularly, the water depth of the aquatic area can be controlled by arranging the water level adjusting structure, and the requirements of the aquatic fireflies on the water depth in different seasons can be better met.