Culture of freshwater crayfish
4 There should be a suitable area of ​​submerged plant area at the bottom of the pond, and there are enough artificial concealed objects, such as waste tires, meshes, bamboo rafts, etc., to provide shelter for lobsters. 3, shrimp feeding and daily management?
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1 The pond should be rectangular, with an area of ​​1334 to 3335m2, and a depth of about 0.9 to 1.5m.
2 The bottom of the pool is hard earth or sandy, without silt, and the pool wall must have a certain slope.
3 The pond should have a good drainage and Irrigation System. The upper part of the pond should be filled with water, one end should be drained at the bottom, and the water inlet and outlet must be protected from enemy fire and escape from the net.
5 Conditional ponds can be equipped with aerators.
6 Before stocking the shrimp, it is necessary to disinfect the pond. If it is a newly-built shrimp pond, the quick-lime can be used to clean the pond. If the old fish pond is cultured, it must be disinfected by dry ponds. In addition to splashing lime, it is also necessary to completely remove the ponds and cockroaches in the pond. Black fish and predatory predators such as snakes and rats.
2, water quality requirements?
Mainly in unpolluted rivers, rivers, lakes, reservoirs and other large water surface water as a source of water, groundwater can also be used as a source of water. Freshwater lobsters have strong adaptability. The pH value of water can survive in the range of 6.10 to 9.33, but 6.5 to 9.0 is appropriate, and it is better to use neutral alkali to facilitate the rapid growth of lobsters. Although freshwater lobsters are resistant to hypoxia, long-term exposure to low dissolved oxygen will affect their growth rate and survival rate. Water quality should also be prevented from being contaminated by heavy metals, insecticides, herbicides, oil, methane, etc. Micro-fluidic water or aquaculture should be added to aquaculture to promote growth. ?
The shrimp seedlings should be placed in the early morning or evening on a sunny day before being put into use. Before putting it on, use a small amount of water to slowly put the seedlings into the container and adjust the water temperature until the water temperature in the container approaches the pool water temperature. The stocking density is 7.5 to 9.0 tails/m2, and the specifications of shrimps stocked in the same pond need to be neat and consistent. ?
Daily management As the freshwater lobster grows fast, the metabolism is strong, and the oxygen consumption is large, the water quality of the shrimp pond should always be kept fresh. Generally, water is added 15 to 20cm every week, so that the water quality is lively and there is enough dissolved oxygen. The bait feed should be fixed, timed, and quantified. The types should be as diversified as possible. Each day should be fed once in the morning and at night. The bait should be placed on the shallow side of the pond.