1, paddy field conditions
Requirements for non-polluting water sources, sufficient water, drainage and irrigation of paddy fields, elevation in the region of 300 meters below the preferred, inlet and outlet should be the size of 20 purpose mesh bag or mesh filtration; soil to loamy good, sandy soil is not suitable to carry out; water, electricity, roads, water conservancy project facilities supporting drainage and irrigation is convenient. However, some farmers are not suitable for shrimp farming paddy for transformation of shrimp farming, the results often lead to more losses than gains.
2, paddy transformation standards
The field dug around 2-4 meters wide and 1.5 meters deep shrimp ditch, set up around the perimeter of the high 0.5 meters of escape facilities; shrimp and rice **** must be rice-based, paddy transformation of the shrimp ditch area is best not to exceed 10%. However, in actual production, some farmers in the paddy field around the opening of the ring ditch, ditch width of 3 to 4 meters, 5 to 6 meters, and even some up to 7 to 8 meters, shrimp ditch area of more than 20% or more.
3, paddy management
planting before the field should be exposed to the sun for a few days, per 667 square meters of raw lime water splashed all over the field, disinfection, with human and animal manure for a good preparation of the field base fertilizer; paddy tanning of water can not be completely sunny, paddy field in general to use organic fertilizers, do not use the fertilizer that harms the crayfish, fertilizer, crawfish will be driven to pre-digged ditches. Crayfish are sensitive to pesticides, try to use biological pesticides. Splash lime water every half a month to disinfect. The water in the paddy field should be changed frequently.
4, the choice of rice seeds
Rice seeds should be selected with disease resistance, insect resistance, resistance to collapse of large spikes, rice quality is excellent. For rice varieties, you can choose the better taste, such as Southern Japonica 5055, 9108. increase the amount of seed, seedling basic seed amount of 1.5 kg - 2 kg or so;
5, young shrimp stocking
Young shrimp stocking with 3%-5% of the brine before soaking 3-5min, kill parasites and pathogenic bacteria, and then placed in the pool of water immersion 1min, lift and set aside 2min-3min, and then soak for 1min, so repeated 2-3 times, so that the young shrimp body surface and gill cavity to absorb enough water before stocking; 5000 tails per acre in the spring, because the spring release of the seedling profitability grasp is not as big as the fall release of shrimp species, so as far as possible, do not put too much. Seed shrimp in the fall, 15-25 kilograms per mu can be sent. Each subsequent year can be appropriate according to the situation to make up some seed shrimp, or even not, which can be judged by the number of shrimp holes. If more, you can not make up, on the contrary, the appropriate placement of new seedlings.
Extended information:
The main value of crayfish
Because most crayfish are very strong anti-pollution, and therefore in the presence of highly polluting toxins in the water, but still can survive. When stocked in an aquarium, they can also effectively remove fish feces as well as moss, contributing greatly to hydrologic remediation.
The protein content of crayfish body is very high, and the meat is soft, easy to digest, for the weak and the sick need to be recuperated is excellent food; shrimp meat is also rich in magnesium, zinc, iodine, selenium, etc., magnesium has an important role in regulating cardiac activity, can protect the cardiovascular system, which reduces the cholesterol content of the blood, preventing hardening of the arteries, while also expanding the coronary arteries, is conducive to the prevention of hypertension and myocardial infarction. hypertension and myocardial infarction.
Crayfish contains astaxanthin, astaxanthin is a very strong antioxidant, Osaka University, Japan, scientists found that astaxanthin helps to eliminate jet lag due to jet lag reaction "jet lag". In addition, crayfish can also be used as medicine, can resolve phlegm and cough, and promote post-surgical wound healing.
References:
People's Daily Online - rice paddies to raise lobsters, do not have to worry about pesticide residues
.