In the face of the imminent summer heat, little rain, etc., in order to effectively manage the management of crabs in the high temperature season, and strive to improve the level of fishery science and technology households, the following points must be made:
First, pay attention to the management of aquatic plants: water plants can be used as a crab plant food, but also crab habitat, shelling, hidden places, but also shade, cooling. Suitable for crab pond aquatic plants are mainly Elodea, Vallisneria, black leaf algae, etc., aquatic plants cover about 58% of the aquaculture area, at the same time on the surface of the water Elodea with cutting tools in time to do cutting treatment, covering the entire pool of aquatic plants Should be appropriately sparse.
Second, to strengthen the control of water quality and water level, higher water temperature in summer, the water quality can easily deteriorate, toxic and hazardous substances increase. To maintain water quality, live, cool, clear and high dissolved oxygen, the transparency is generally about 40 cm, the pH is controlled between 7.0-8.5, and the water depth is preferably maintained at about 1.5 meters. Change the water every 5 days in the hot season, change the water every time about 40 centimeters, side by side note, every 10 days per acre of water with a fresh lime of 10 kg Quanchiposa once, improve water quality, increase water calcium, is conducive to river crab Shelling growth.
Third, science feeding: pay attention to nutritional balance, feeding in accordance with the "four look" and "four set" of scientific methods: bait into the pool should be eaten in about 4 hours is appropriate. Summer crab diet should be plant-based, with a reasonable mix of animal feed. At the same time, according to the actual number of snails in the crab pond, a recharge will be conducted in early August to ensure that the live crabs of the crabs are adequate.
Fourth, strengthen disease prevention and control, adhere to the combination of ecological regulation and scientific drug use, and follow the principle of “giving priority to prevention and focusing on preventionâ€. Regular external use of chlorine-containing or iodine-containing preparations and other water disinfectants and biological agents and "carapace net", "fibrin net" and other insecticides Quanchiposa, used interchangeably, add baits in the bait every month to make baits, Continuous feeding for 3 days to 5 days, external use of oral administration can effectively prevent the occurrence of crab disease.
Fifth, to ensure safety: prevent accidents, field operations to do a good job of preventing heatstroke, cooling, lightning, and other safety precautions. Diligent ponds, inspection facilities, in particular embankments, power, gate culverts and other facilities to ensure safe production.
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