Live water pond and grazing type low cost efficient fish culture technology
Living water ponds grazing fish farming is to feed fish by using the living water ponds and aquatic plants, plankton, zoobenthos and aquatic insects in the waters. And through regular rotation of the culture, it can not only make full use of the natural food in the water, but also produce high-quality fish products, so as to achieve the purpose of high quality and low cost of efficient fish farming. Live water Hetang grazing fish has many advantages: First, it can save the labor of excavating fish ponds, save land, spend less labor, investment provinces, and quick results. The second is to make full use of the natural bait in the river pond, save feed, reduce the cost of fish farming, and increase economic efficiency. The third is that the water quality of grazing fish in live water ponds is fresh, there is sufficient dissolved oxygen, no pollution, and the growth rate of fish is fast. Fourth, grazing fish can control and prevent the occurrence of fish disease through regular rotation, which will help improve the survival rate of farmed fish.
First, the choice of fish ponds. Huoshui pond grazing fish should choose slow water flow, small drop in water level, no water pollution, water quality, rich grass, rich natural food, water depth 3 to 5 meters, less water inlet and outlet, few ships, area 3 to 10 Hectares, easy to raise and manage the water surface.
Second, the use of fish facilities. It is mainly based on cages and bamboo foils. Types of fish-stopping equipment include: tamper-foil, straight-through foil, pocket-bottom foil, and bridge foil. In the production and application of fish-fighting facilities, local conditions should be adopted. In areas where water flow is slow and where there are no ships, use ramming foils or straight foils; in areas where the water flow is relatively rapid and the water surface is wide, use a pocket or bridge foil.
Third, the removal of wild fish. Because the living water pond is an open body of water, there are often many ferocious carnivorous fish in the waters, such as black fish, squid, and squid. In order to increase the survival rate of grazing fish, it is necessary to do a good job of clearing wild fish. Specific methods: First, to drive away the pests, the second is to pull the net, the third is fishing, and the fourth is electric hunting.
Fourth, fish stocking requirements. The stocking of fingerlings in the live-water pond and grazing type of fish-raising water should be based on the natural conditions of the water body, feed conditions, source of the fish, and management level. In the first year due to the abundance of aquatic weeds and benthos in Hetang, the stocking of fish species should be dominated by food-eating fishes, which account for 40% to 50% of grasses and squid, 30% to 40% of alfalfa, blue and squid, and white flowers. Earthworms account for about 20%, and for every 667, the stocking rate is 40-50 kg and 800-1200 tails. By the second year, the aquatic weeds and benthic organisms in Hetang are basically eaten by fish, and the water quality gradually becomes fattened. It is necessary to change the stocking structure of the fish species in a timely manner. Fertilizer fish account for 50%, grass and carp accounts for 20% to 30%. , omnivorous fish accounted for 20% to 30%. The general requirements for fish stocking are early, good, full, and large. Early: That fry stocking should be done as soon as possible. Small-sized fingerlings should be stocked before the end of March. The best-sized fingerlings should be stocked before the end of May; good: that is, fingerlings should be robust, without injury, and disease-free; foot: that is, the number of fingerlings should be sufficient, and the variety should be sufficient. To the road; big: that is, the size of the fish species should be large in order to improve the survival rate of grazing fish.
Fifth, the management of farmed fish. "Three points of raising, seven points." Management is the key to the success of open-water fish farming in the rivers and ponds. The key points for the management of grazing fish farming in live rivers and ponds are: preventing flight, preventing floods and preventing stealing. Careful attention must be paid to the key foils, and the foils should be regularly checked and repaired. Problems should be found and resolved in time. We must conscientiously do a good job in the prevention of typhoon and anti-rainstorm in the flood season, and adhere to day and night inspections to ensure that everything is safe. Feeding baits should be adapted to local conditions and have a flexible grasp. There are many natural foods in the early stages, and fish feeds should not be fed or fed. The amount of natural foods in the middle and later waters should be gradually reduced. Fodder and concentrates should be fed in time to meet fish growth requirements. need.
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