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

The invention discloses special EM (Effective Microorganisms) bacteria powder for aquaculture, as well as a preparation method and application of the special EM (Effective Microorganisms) bacteria powder. Bran, corn flour, amino acid powder and the like, which are used as dry matter fillers, are mixed with brown sugar, glucose and the like to obtain a mixture; the mixture is subjected to sealing fermentation at 25-37 DEG C for about 10 days by lactic acid bacteria, bacillus licheniformis and bacillus coagulans, so that fermented materials are prepared; then the prepared fermented materials are dried and crushed and are mixed with bacillus subtilis to obtain a final product. The EM bacteria powder can be directly scattered in a water body to inhibit pathogenic microorganisms through mass propagation of probiotics, decompose harmful substances in the water body, promote the growth of normal floras and beneficial algae in a cultivation ecosystem and keep the ecological balance of the aquaculture water body. The method is adopted to prepare the EM bacteria powder, the fermentation period is short, the process is simple, the equipment investment is low, the materials are convenient to obtain, and the method is easy to implement and is suitable for industrial production and self-production of households.

The invention relates to a device of a pond culture machine, in particular to a mechanical device which can automatically move, run and work in a pond, i.e., a pond bottom sediment agitator, wherein a horizontal sliding plate (131) is arranged on the bottom of the pond bottom sediment agitator, an L-shaped cylindrical water barrel (132) is arranged above the horizontal sliding plate (131), stainless steel screens (135) used for preventing fish from entering are arranged at an upper opening and a lower opening respectively, a floating body assembly (138) is used for clamping the exterior of the water barrel (132), a sediment lifting device (134) is arranged inside a vertical tube of the water barrel (132), a submersible motor (134-g) is used for supplying driving power and transfers the power to an air floating output shaft (134-b) at the lower end part through an output shaft by a gear box and to a propeller (134-d) which is arranged relatively upwards through another output shaft which has another speed, and the air floating output shaft (134-b) is connected with a driving air floating generator (134-a). The pond bottom sediment agitator has a simple structure, is easy to manufacture and convenient to use, has a good bottom sediment agitating effect and an oxygen increasing effect, and enables the pond bottom sediment to give full play to the ecological functions without polluting the environment.

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 relates to a water electrolyzing type artificial fish reef. The water electrolyzing type artificial fish reef is composed of a reef body, an electrolyzer and a floating device and can provide a necessary and safe habitat for gathering, foraging, breeding, growing and hiding of aquatic organisms such as fishes and further can generate an ascending flow which can change the distribution of a flow field in a sea area to drive exchange of bottom nutritive salt substances and an upper water body to provide nutrients for proliferation and growth of plankton in the upper water body and promote the breeding ability of planktons so as to form an excellent bait field. The bait field attracts migratory fishes to be gathered and detained to realize a better fish gathering effect, and meanwhile, a current generated by a solar power generation device can electrolyze desalted seawater. The electrolyzed oxygen can increase the oxygen content of seawater around the fish reef to create a good habitat for aquatic organisms such as shells and trepangs. The electrolyzed hydrogen is collected in a gas collecting box, so that a clean energy source can be provided, thereby greatly improving the primary productivity in the surrounding sea areas.

The invention relates to a fishery microelement fertilizer and a preparation method thereof, belonging to the technical field of aquaculture. The method comprises two major steps of proportioning the fishery microelement fertilizer and mixing and stirring. The fishery microelement fertilizer provided by the invention can promote the photosynthesis of algae, increase the density of beneficial algae in the water body of an aquaculture pond, improve the balance of algal facies and enhance the primary productivity of the culture water body; and by mixing the fishery microelement fertilizer with nitrogen, phosphorus and potassium in the bulk fertilizer, the fertilizer efficiency can be improved, the water quality of the pond water can be improved, the activity of the water body can be enhanced, and the consumption of the bulk fertilizer can be reduced; and moreover, the effects of reducing the morbidity of the farmed animal and improving the disease control of the farmed animal are realized.

The invention discloses a pelagic floating fish reef based on tide and wave power generation and belongs to the technical field of marine ranch artificial fish reefs. The pelagic floating fish reef comprises a bottom-layer fish reef, two ends of the bottom-layer fish reef are connected with a floating body through steel ropes, a plurality of power generator sets are arranged on the floating body,a netting is connected between the steel ropes, and an algal spore seeder is arranged below the middle of the netting. The pelagic floating fish reef combines a wave energy and tidal energy power generation device with a floating body structure of a floating fish reef to realize primary conversion from ocean energy to electric energy and can attract fishes to gather, so that primary productivity of a sea area is improved greatly.

The invention discloses a liquid microbial agent containing polyglutamic acid and a preparation method thereof. The liquid microbial agent is prepared from 1-20 parts of a growth-promoting bacterium liquid, 1-20 parts of polyglutamic acid, 1-20 parts of mineral substances, 50-70 parts of bioorganic matter, 1-5 parts of chlorophyll and 1-5 parts of vitamin. The composite liquid microbial agent hasthe advantages of being high in water-soluble speed and content of viable organisms, and capable of inhibiting pathogenic microorganisms, flocculating harmful substances in a water body to purify water quality, chelating heavy metal ions in the water body to alleviate the toxicity of the heavy metal ions, and promoting photosynthesis of algae to provide aquatic animals with rich nutrition, and hasmultiple functions of water purification, production increase and the like.

The invention discloses a method for regulating nematode trophic groups of a lawn compost medium by means of carbon nanomaterials. The method comprises the steps that 1,500 g of soil is loaded into each plastic pot, 50 g of domestic rubbish compost is added into each pot, and the domestic rubbish compost and the soil are compounded into a lawn establishment medium; the carbon nanomaterials of graphene, graphene oxide and carbon nanotubes are added according to the proportion that each carbon nanomaterial accounts for 1% (w/w) of the mass of the soil, a treatment group without the carbon nanomaterial serves as a control group, 5 g of seeds of lawn plant festuca arundinacea are seeded into each pot, an experiment is conducted indoors, the whole experiment lasts for 130 d, and the first harvest is mowed on the 65 d for determination. It is shown through experimental results that after the carbon nanomaterials are added, not only are growth and propagation of most trophic group nematodes promoted, but also a positive influence is brought to growth of the plant.

The invention relates to the technical field of water body monitoring, in particular to a real-time continuous in-situ water body monitoring device for a freezing period, which comprises a monitoring mechanism and an adjusting mechanism, the monitoring mechanism comprises a dark acrylic pipe and a bright acrylic pipe, the top of the dark acrylic pipe and the top of the bright acrylic pipe are both provided with sealing devices, dissolved oxygen probes are suspended in the dark acrylic tube and the bright acrylic tube, fine lines are bound on the dissolved oxygen probes and penetrate through the sealing device, chucks are arranged in the middle of the dark acrylic tube and the bright acrylic tube, and the adjusting mechanism comprises a fixing frame and two sets of adjusting frames. The adjusting frames slides on the fixing frame and are connected through a fastening screw, concave surfaces are formed in the side walls of one sides of the adjusting frames, adjusting handles are rotationally arranged on the adjusting frames on the same sides of the concave surfaces, and adjusting plates are movably hinged to the end of the adjusting handles. According to the invention, the real-time monitoring effect of the primary productivity of the subglacial water body in the freezing period can be obviously improved, and the measurement precision is improved.