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Crayfish culture technology freshwater crayfish culture technology
Freshwater lobster is an economical freshwater shrimp species, which has six characteristics: first, it is big and fat; Second, fast growth and high yield; Third, rich nutrition and tender meat; Fourth, it has strong adaptability and can survive in bad weather and environment; Fifth, the eating habits are miscellaneous, which can not only eat animal feed, but also eat artificial compound feed and humus; Sixth, the economic benefits are high. Pond conditions The pond for breeding freshwater lobsters should be selected in a place with sunny ventilation, quiet environment, convenient drainage and irrigation, and pollution-free water quality. ① The pond should be rectangular, with an area of1334 ~ 3335 per square meter and a water depth of about 0.9 ~1.5 meters. ② The bottom of the pond is hard soil or sandy without silt, and the wall of the pond must have a certain slope. (3) The pond should have a good irrigation and drainage system, with water entering from the upper part of one end and drainage from the bottom of the other end, and the water inlet and outlet should be provided with a net cover to prevent enemy damage and escape. (4) The bottom of the pond should have a submerged plant area with an appropriate area, and there should be enough artificial hidden objects, such as waste tires, nets, bamboo rafts, etc., for lobsters to hide and inhabit. ⑤ Conditional ponds can be equipped with aerators. ⑥ Disinfect the pond before releasing shrimp seedlings. If it is a new shrimp pond, you can use quicklime to clean the pond. If it is an old fish pond, you must dry the pond for disinfection. In addition to splashing quicklime, you must thoroughly remove the predatory enemies such as loach, catfish, snakehead, snake and rat in the pond.

Water quality requirements mainly use unpolluted surface water from large water bodies such as rivers, lakes and reservoirs as water sources, and groundwater can also be used as water sources. Freshwater lobster has strong adaptability, and the pH value of water can survive in the range of 6.10 ~ 9.33, but it is suitable to be 6.5 ~ 9.0, and it is best to be neutral and alkaline to facilitate the rapid growth of lobster. Although freshwater lobster is resistant to hypoxia, its growth rate and survival rate will be affected if it is in a state of low dissolved oxygen for a long time. The water quality should also be prevented from being polluted by heavy metals, pesticides, herbicides, oil, methane, etc., and micro-running water or regular fresh water should be adopted in aquaculture to promote growth.

Shrimp fry throwing and daily management Shrimp fry throwing should be carried out in the early morning or evening on sunny days. Before throwing, a small amount of pond water should be slowly added into the seedling transport container, and the water temperature should be adjusted until the water temperature in the container is close to that of the pond water. The stocking density is 7.5-9.0 shrimps per square meter, and the specifications of shrimps stocked in the same pond are consistent. Due to the fast growth, vigorous metabolism and large oxygen consumption of freshwater lobsters, the water quality of shrimp ponds should be kept fresh frequently, and water15 ~ 20cm is generally added every week to make the water quality lively and have enough dissolved oxygen. Bait feeding should be fixed-point, fixed-time, quantitative, diversified as far as possible, fed once every morning and evening, and bait should be thrown at the shallow water side of the pond.