First, strictly control the quality of civil engineering projects
Farming areas should be selected paddy fields that rely on water sources, adequate water supply, convenient irrigation and drainage, drought and flood protection, convenient transportation, and no pollution. The area of ​​the plots should not be too large. Each plot should be 3-5 acres. A trench must be dug around the plot, with a width of 1 meter and a depth of 0.5 meters. Another “10†word in the middle of the plot should be communicated to the trench. The width of the ditch is 0.5 meters and the depth is 0.3 meters, which is conducive to maintaining a relatively high water level in the rice paddy field during the high temperature season, which is beneficial to the shrimp fishing. Tian Hao made a plastic film that was 60 centimeters high and buried 25 centimeters at the base to prevent escape. The inlet and outlet openings are tightly sealed with double-dense nets or nylon nets to prevent the lobster from escaping and becoming inaccessible.
Second, rice cultivation and management
The normal growth and life of lobster requires fresh water and oxygen-rich environment, and it is sensitive to chemical fertilizers and pesticides. Therefore, the lobster-raising rice field should, in principle, reuse organic fertilizer, reduce chemical fertilizers, and strictly control the amount of pesticides. Before transplanting, 300-400 kg of fermented organic manure was applied per acre, which was conducive to the cultivation of food organisms and improved soil fertility and increased organic matter. Under the premise of applying basal fertilizer, the frequency of topdressing should be reduced as much as possible, especially chemical fertilizers (some ammonia nitrogen fertilizers have poisonous effects on shrimp), so as to reduce the chance of water pollution. Fertilizer should be suitable for urea and superphosphate, top dressing should not exceed 3 times. In the management of paddy fields, the number of pest control pesticides must be strictly controlled. If pesticides are to be applied, they should be drained until they are exposed, and the highly efficient and low-toxicity pesticide water is sprayed on the surface of rice stems and leaves. Reducing pesticide pollution pollutes the body of shrimp.
Third, shrimp feeding
After the rice is planted, aquatic plants such as arbutus, bitter grass, barnyardgrass and black-leaf algae are introduced in the ditch and culvert area for their activities, habitats, and concealment. After waiting for the seedlings to return to green, the shrimp seedlings should be put into use first, 30-40 kg of egg-holding shrimp should be placed per mu, or 60-80 kg of shrimp should be placed. The shrimps to be put in order to be as tidy as possible specifications, decentralized stocking, dense and uniform, to prevent local dense and cause slaughter, affect the survival rate.
Fourth, feeding and management
Lobster is omnivorous, eating animal feed, but also feeding on plant feed. In order to reduce the cost of breeding, bait feed can be based on plant-based feed, such as fresh water plants, water peanuts, water spinach, bran, rice bran or semi-rotted barley, wheat, broad beans, rice and other plant straws. Of course, if some animal feed is available, such as minced snails, small trash fish, and animal organs, the growth of lobsters will be faster.
Fifth, water quality management Lobster survival resistance to disease, basically no disease, but the transparency of the water body is very demanding, suitable for the growth of lobster transparency of 25-40 cm. Therefore, 30-50 tail flowers and white peony can be placed per acre to regulate water quality. During the breeding period, generally every 15-20 days, 10-15 kg of lime per acre is used to sprinkling water, regulating water quality and benefiting the lobster clam shell.
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