Put 0.8cm juvenile shrimp 10- 15000 per mu. In the early stage, natural bait was given priority to, soybean milk and minced fish were properly fed, and artificial feed was given priority to with individual growth.
Crayfish should be stocked with clear water, and shrimp can only be released after water testing is safe. There are two ways to raise crayfish: First, in the first ten days of September after rice harvest, the shrimps are directly put into the rice fields and allowed to breed by themselves. According to the actual situation of rice field culture, generally, 20 kilograms of crayfish with individuals over 40 grams are cultured per mu, and the sex ratio is 3: 1.
2. After the rice seedlings are planted in May, put 2-4 cm young shrimps1500-2,000 or 30 kg/mu. When stocking crayfish, attention should be paid to the quality of young shrimps, and the stocking specifications in the same field should be as neat as possible, and all crayfish should be stocked at one time. In sunny mornings or rainy days, the young shrimps are disinfected with 3% ~ 4% saline bath after stocking 10 minute.
Rice planting:
Choose fields with good water quality, no pollution sources around, strong water retention, convenient irrigation and drainage, and no flooding to raise shrimp in rice fields. Dig a shrimp culture ditch along the inside of the rice field ridge, with a width of 1.5m and a depth of1m. If the site area is large, dig a trench in the middle of the site with a width of1m.
The width of the ridge is more than 3 meters, and the height of the ridge is 1 meter. At a distance of 0/m from the ridge/kloc-0, a pile with a height of 1 .5 m is drilled every 3 meters, which is erected with bamboo, and there are melons, beans and gourds. Planted on the edge of the ridge. After the vines are put on the shelves, they will play the role of shading the sun and cooling off the heat in hot summer.
Extended data:
Crayfish are cultured all over the world, forming a huge wild population. China was introduced from Japan in 1930s and 1940s, and Japan was introduced from the United States earlier, and it was mainly used as food and pets. Crayfish are often mixed with crops (such as rice).
No need for artificial incubation. Once the original seed is put into the pond, it can achieve self-maintenance. After harvesting, there is no need to put the original seed again. Those who escaped dug holes in the dam to survive. They can survive in temporary water bodies, have a wide range of feeding habits, establish populations very quickly and spread easily. Extremely threatening local fish, crustaceans and aquatic plants and destroying the local food chain;
Because it feeds on roots, it directly damages crops (especially aquatic and semi-aquatic crops such as rice) and natural vegetation; Cave construction leads to the loss of irrigation water and the destruction of fields; Crayfish are omnivorous, which has a certain influence on the flowering of fry and the cultivation of 1 year-old fish, and is harmful to the artificially cultured young mussels.
Crayfish often cut crops, especially rice crops, because of its strong adaptability, strong resistance, wide feeding habits and rapid population proliferation, and may compete with local crayfish varieties.
References:
Baidu encyclopedia-crayfish