What are the key points for winter management of rice-field shrimp farming
Shrimp (Shrimp) is an aquatic arthropod belonging to the crustacean class of arthropods, with many species, including freshwater shrimp, river shrimp, grass shrimp, crayfish, prawn, white shrimp, greasyback shrimp, mantis shrimp, lobster, and more. Shrimp has high therapeutic and nutritional value and can also be used as a traditional Chinese medicinal material.
Modern medical research has confirmed that shrimp has extremely high nutritional value, can enhance the human body's immunity and sexual function, tonify the kidney and strengthen yang, and resist premature aging. Regularly eating fresh shrimp (stir-fried, braised, or stewed), taken with warm wine, can treat conditions such as kidney deficiency and impotence, aversion to cold, physical fatigue, and soreness and pain in the waist and knees. If a woman has little or no milk after childbirth, 500 grams of fresh shrimp meat, ground into a paste and taken hot with yellow rice wine, 3 times a day for several consecutive days, can have a milk-promoting effect. Shrimp skin has a sedative effect and is often used to treat neurasthenia and various symptoms of autonomic nervous system dysfunction. Sea shrimp is a delicious food that can provide nutrition to the brain. Sea shrimp contains three important fatty acids that can help people maintain concentration for long periods. Shrimp, crayfish, and prawn contain large amounts of vitamin B12. They are also rich in zinc, iodine, and selenium, and are low in calories and fat. Note: the cholesterol content is relatively high, and people with high cholesterol should not eat them excessively.
As winter temperatures drop, there are many points to pay attention to in shrimp farming, especially for farmers practicing rice-field shrimp farming, who must pay attention to the following points:
1. Reinforcement: After shrimp fry arrive in a new environment, they will dig holes and make burrows everywhere. If the field ridge is too narrow, it is easy for crayfish to "dig through the wall", causing shrimp fry to escape and the paddy field to leak water. When the water level drops, other crayfish will again dig new holes and burrows or escape.
2. Burrow creation: On both sides of the field ditch, below 15 cm of the field surface, use a wooden stick or shovel to make some artificial burrows in the mud. The burrow angle should be small, as close as possible to "parallel" with the field. Once crayfish have "ready-made" burrows, they will not "wear themselves out" digging their own, which saves their physical energy and reduces damage to the field ridge.
3. Straw covering: Properly scatter some crop straw (such as rice straw) in the paddy field. First, it plays a role in keeping warm; second, it serves as feed, because after the straw and rice straw rot, they are very good feed for crayfish.
4. Feeding: Add nutrients for crayfish at the right time and in the right amount, such as wheat bran and corn grits. Mix the feed with water, knead it into small balls, and place them in the field. With nutrition, it is easier for crayfish to grow and reproduce.
5. Water retention: Keep the water surface 20 cm above the field surface, and do not let it rise and fall from time to time. Changes in water level can easily cause crayfish to repeatedly dig holes, move burrows, or consume physical energy, lead to shrimp fry death, or damage the field ridge, among other adverse effects.