How to breed crayfish in paddy field

1. Paddy field conditions

It is required to have a paddy field with pollution-free water source, sufficient water and convenient irrigation and drainage, preferably in the area below 3 meters above sea level, and the inlet and outlet should be filtered by a mesh bag or mesh with a scale of 2 meshes; Loam is the best soil quality, but sandy soil is not suitable for development; Water, electricity and roads are connected, and irrigation and drainage facilities are convenient. However, some farmers have transformed the rice fields that are not suitable for shrimp farming, which often leads to the loss.

2. Rice field reconstruction standard

Shrimp ditches with a width of 2-4 meters and a depth of 1.5 meters are dug around the field, and escape prevention facilities with a height of .5 meters are set around; Shrimp rice must be mainly rice, and the area of shrimp ditch should not exceed 1% when rice field is transformed. However, in actual production, some farmers open ditches around rice fields. The width of ditches is 3-4 meters, 5-6 meters, or even 7-8 meters, and the area of shrimp ditches exceeds 2% or even more.

3. Paddy field management

Before planting and breeding, the field should be exposed to the sun for several days, and the whole field should be sprinkled with quicklime water every 667 square meters. After disinfection, human and livestock manure should be used to prepare the field base fertilizer; When the paddy field is sun-dried, the water can't be completely opened. Generally, organic fertilizer should be used in paddy fields, and no fertilizer harmful to crayfish should be used. When applying fertilizer, crayfish should be driven to the ditch dug in advance. Crayfish are sensitive to pesticides, so try to use biological pesticides. Sprinkle quicklime water every half month for disinfection. The water in the rice field should be changed frequently.

4. Selection of rice seeds

Rice seeds should be of large panicle type with disease resistance, insect resistance and lodging resistance, and the rice quality is excellent. . For rice varieties, you can choose ones with good taste, such as Nanjing 555 and 918. Increase the seed consumption, the basic seed consumption of seedlings is about 1.5 kg-2 kg;

5. Stocking of young shrimps

Before stocking, the young shrimps are washed with 3%-5% salt water for 3-5min to kill parasites and pathogenic bacteria, then soaked in pool water for 1min, lifted and put aside for 2min-3min, and then soaked for 1min, and this is repeated for 2-3min, so that the body surface and gill cavity of the young shrimps can absorb enough water before stocking; You can put 5, fish per mu in spring, because the profit of releasing seedlings in spring is not as big as that of releasing shrimps in autumn, so try not to put too much. In autumn, sow shrimps and deliver 15-25kg per mu. In the future, some kinds of shrimp can be supplemented appropriately every year according to the situation, or even not, which can be judged by the number of shrimp holes. If there are too many, it is not necessary to make up. On the contrary, new seedlings are put in properly.

Extended information:

The main value of crayfish

Because most crayfish are very resistant to pollution, they can still survive in water containing highly polluting toxins. Stocking in aquariums can also effectively remove fish excreta and moss, which has a great contribution to the improvement of hydrological environment.

The content of protein in crayfish is very high, and the meat is soft and easy to digest, which is an excellent food for people who are weak and need to be nursed back to health after illness. Shrimp meat is also rich in magnesium, zinc, iodine, selenium, etc. Magnesium plays an important role in regulating heart activity and protecting the cardiovascular system. It can reduce the cholesterol content in blood, prevent arteriosclerosis, and dilate coronary arteries, which is conducive to preventing hypertension and myocardial infarction.

Crayfish contains astaxanthin, which is a strong antioxidant. Scientists at Osaka University in Japan have found that astaxanthin can help to eliminate "jet lag" caused by jet lag. In addition, crayfish can also be used as medicine, which can eliminate phlegm and relieve cough, and promote the wound healing after operation.

Reference: Baidu Encyclopedia-Crayfish

People's Daily Online-Lobster Raising in Paddy Fields, so don't worry about excessive pesticide residues.