37results about How to "Improve primary productivity" patented technology

The invention discloses a pull-type layered artificial flexible floating fish reef, which comprises floating balls connected in series by anchor ropes, iron rings are sheathed on the anchor ropes under the floating balls, and opposite surfaces are respectively arranged on the upper and lower sides of the iron rings to repel each other. Magnet a and magnet b are set, one end of the hoop pulls the main cable through the anchor rope, the upper part of the main cable is evenly distributed with floating fish reefs, the lower part of the main cable is connected in series with a counterweight, and the lower end of the anchor cable is fixedly connected to the anchor block. A string of floating balls is fixed on the anchor block by using an anchor block at the lower end of the anchor rope for mooring, and the upper end is connected in series. The reef makes the overall firmness of the floating fish reef increase, thereby improving the safety performance, and it is easy to put in. The magnet a and the magnet b arranged on the opposite sides of the iron ring are repelled, which can generate suction to the iron ring, and pass through The iron ring limits the sinking and floating height of the floating fish reef, and the device has a simple structure, is economical and environmentally friendly, has universality, and is highly capable of mass feeding.

The invention relates to a water fertilizing method for large-water-surface pond culture. The method comprises the following steps: detecting indexes of bottom sludge of a pond; recording detection results: (a) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus exceeds 6mg / L; and (b) the content of ammonia nitrogen exceeds 20mg / L, and the content of labile phosphorus is lower than 6mg / L; and adopting different water fertilizing routes. According to the water fertilizing method for the large-water-surface pond culture, provided by the invention, the problems in a large-water-surface pond culture process that water fertilizing is difficult, the water fertilizing cost is high, the water fertilizing effect is poor, bottom sediments of the culture pond are deteriorated, a large amount of organic matters are accumulated, and the oxygen content is low are solved, pond culture conditions are improved, and the yield of the culture is increased.

The invention discloses a method for restoring benthic animal resources in the artificial forest of Sangria apetalum. The present invention treats the sea mulberry forest, prunes or removes the weeds and miscellaneous shrubs under the forest and then replants the native mangrove plant seedlings; Increase the harvesting of benthic animals; then dig ditches under the sea mulberry forest; after the ditches are dug, first put in pioneer aquatic animal seedlings, then put in economic species benthic animal seedlings, and finally put swimming animals in the ditch seedlings. The present invention does not need to cut down the pure forest of Sangria apetalum that has been recovered into a forest, but reduces the influence of certain biological characteristics of Sangria apetalum on benthic animals by transforming the restored Sangria apetalum artificial forest , to achieve the purpose of sustainable utilization of the Sangria apetalum plantation swamp as a marine fishery base. At the same time, artificially proliferate some economic benthic animals, and establish the ecological balance of the artificial forest area - the best model for economic benefits.

The invention relates to an easy planting method for lake submerged plant through water interception, which proposes that lake mud containing corresponding materials capable of helping submerged plant to propagate and grow, such as roots, stems, seeds and buds are used for quickly and easily plant the lake submerged plant in a planting area without underflow. In the easy planting method, a large planting area of more than 0.25 square kilometers and a small water interception area of 2500 to 10,000 square kilometers are surrounded by floating enclosures with full height or half height so as to prevent blue algae out of the planting areas and wind-driven lake current from damaging the plant in the planting areas; the method of dredging along a strip-shaped area biennially is utilized, the lake mud in the areas for helping the submerged plant to propagate and grow is dredged to obtain the materials capable of helping the submerged plant to propagate and grow, such as roots, stems, seeds, buds and the like, and the mud is uniformly thrown into the planting areas as much as possible. The planting method of the present invention has simple and quick effect, low cost and high efficiency, the submerged plant can recover propagation and growth easily and quickly, and the problem that present technique for recovering the propagation and growth of the submerged plant in free lake water areas has complexity, high cost and difficulty in generalization is solved.

The invention discloses a mobile oxygenation device for a bottom water body of an aquaculture pond. The oxygenation device comprises a solar power assembly, an upper layer water body extraction assembly, a first floating body and a second floating body, wherein the first floating body is used for bearing the solar power assembly; the second floating body is used for bearing the upper layer water body extraction assembly; the first floating body and the second floating body are connected integrally through a connecting rod; the solar power assembly comprises a solar power generation plate, a solar power source, a guide bracket and a driving motor; and the upper layer water body extraction assembly comprises an upper layer water body extraction barrel and propeller blades. With the adoption of the device, the oxygen production capability of phytoplankton in the pond is used, and supersaturated dissolved oxygen produced by the phytoplankton on the water body surface of the pond at noon is extracted to the anoxic water body at the bottom of the pond and stored, so that the dissolved oxygen content in the whole pond is significantly increased, and problems of oxygen deficiency at the bottom of a traditional pond, water quality stratification and previous insufficient utilization of the oxygen produced by the phytoplankton are solved. The solar plate is used as a power source, and the device is independent of external power sources and electric wires, so that the device can be used normally in unpowered regions.

The invention relates to a multifunctional fishpond deep-layer oxygenation water treatment machine, which consists of on-water equipment and underwater equipment, wherein the on-water equipment comprises an equipment carrier, a solar generator set, a wind energy generator set, a programmable controller and a material liquid storage tank, the solar generator set, the wind energy generator set, the programmable controller and the material liquid storage tank are arranged on the equipment carrier, an electric valve is arranged on the material liquid storage tank, the solar generator set, the wind energy generator set and the electric valve are connected with the input end of the programmable controller and are controlled by the input end of the programmable controller, the underwater equipment comprises a main pipeline, a direct current submersible pump, a parallel Venn machine set and a fountain aeration matrix group, the direct current submersible pump is arranged on the main pipeline, the parallel Venn machine set is formed by parallelly connecting a plurality of Venturi tubes, and the fountain aeration matrix group consists of a plurality of fountain aeration matrixes. The equipment is clean and environment-friendly, the investment is low, safety and reliability are realized, the unattended operation can be realized, the operation cost is low, the oxygenation efficiency is high, the whole water body of the sealed pond can form the relatively stable flowing state, good water body ecological environment is formed, and in addition, the effect can also be realized when the equipment is used in the frozen season in winter.

The invention relates to a synergistic aquaculture method for resource-based treatment of bottom sludge in intensive cultivation ponds, and belongs to the technical field of aquaculture. The method of the invention includes the matching of cultured species, the resource treatment of sediment and the use of oxygenation facilities. According to the present invention, the ratio of omnivorous fish and filter-feeding fish is 5:1-5:2 for polyculture, and then adopts a specific method to process sediment resources during the breeding period, and finally adds specific oxygen-increasing facilities. These three links interact with each other to recycle the sediment nutrients, so as to achieve the goal of breeding efficiency. On the one hand, the original function of the sediment is restored, and the oxidation state is restored. On the other hand, the organic matter is oxidized to reduce the oxygen debt and the probability of disease outbreak. Moreover, the purpose of increasing production and income can be achieved without adding too much material.

The invention discloses an ecological water conservation method for a sea island wet land. The ecological water conservation method comprises the following steps that I, a water conservation dam is built at a downstream ditch opening of a runoff ditch, and a plurality of concave drain openings are formed in the top of the water conservation damp at intervals; II, the runoff ditch is trimmed, a plurality of reservoirs are excavated in the positions, located at the two sides of the runoff ditch, of the wet land, the reservoirs communicate with the runoff ditch through connecting ditches, and the reservoirs communicate with one another through connecting ditches; III, aquatic plants are planted on the surface of open water in the runoff ditch, the reservoirs and the connecting ditches, the coverage of the aquatic plants reaches 60-80%, terrestrial salt-tolerant plants are planted on the surfaces of side slopes and waterlogging slopes of the sea island wet land, and the canopy density of the terrestrial salt-tolerant plants reaches 0.8 or above; and IV, aquatic organisms are put into the reservoirs. According to the ecological water conservation method, the water storage of the sea island wet land increases by 2-8 times, the runoff is retained by 9-37%, the evaporation consumption of the water storage is reduced by 47%, and the waste of fresh water resources is greatly reduced.