Astragalus ultra-high density temperature-controlled culture

Astragalus ultra-high density temperature-control culture technology is a kind of breaking high-density intensive cultivation mode, mainly to make up for the lack of cage culture and common soilless aquaculture, its advantages are: small area (0.45 ~ 2 square meters); water level Shallow (5 to 18 centimeters); high density (2.5 to 7.5 kilograms per square meter); high yield (about 50 kilograms per square meter). Now introduce its technical essentials as follows, for the reference of yellow cricket breeding enthusiasts.
First, the selection of the site selection farm site requires no pollution sources, the terrain is flat and there are adequate and clean water conditions, drainage and irrigation convenience, sheltered from the sun, the power supply is continuous protection, convenient transportation, if you can put the abandoned soft-shelled turtle breeding greenhouse The transformation will not only simplify the construction of the pool but also save the cost of breeding.
Second, build pool design Choose a site with flat terrain and solid foundation. The pool area will be determined according to actual needs. It should be generally around 100 square meters. The pool yard is designed to be rectangular. Surrounded by bricks, 70 to 80 centimeters high, the bottom of the pool is leveled with bricks and cement. Rectangular pool yards are built into two-by-two-meter round arches, and then the pond is longitudinally tiled to form an area of ​​1 square. About meters, a small pond with a height of 30 centimeters, each small pond can be painted with a special waterproof paint for aquatic products, which can prevent the pool from seepage, make it convenient and clean, and can also cause bacteria to lose its parasitic place. Each two rows of ponds have a total of one drain and inlet pipe. The drain pipe uses a two-way plastic pipe elbow. The elbow is installed upwards at the corner of the bottom of the pool. The plastic pipe with a diameter of 3 cm is connected to the reservoir. , In the inlet pipe through the initial position of each pool to open a water hole, in the temperature control shed the top to build a 3 to 4 meters, 1 to 1.5 meters of the reservoir and equipped with a pump and a water level lifting angler Design and install a heating furnace (self-designed) in the reservoir bottom or in the pool. Put a foam plate with an area of ​​0.7 square meters and a thickness of 2 centimeters in each pond. Do not allow the foam to cover the water inlet in the pool. Let water flow directly into the pool. The greenhouse is covered with wood strips, bamboo rafts, foam, and plastic film.
Third, the kind of stocking
1. Select species. The best time is from the end of March to the end of April. During the period from early July to mid-September, the best seedlings to be caught are the best. All types of infections, swelling of the anus, swelling of the anus, and loss of mucus should be determined. Excluding, the body color of the seedlings is better with dark yellow spots. Special attention should be paid to the fact that it is not advisable to purchase the alfalfa within 3 days before and after the rain. When the farmland is heavily sprayed with pesticides and chemical fertilizers, it cannot be harvested.
2. Disinfection. The purchased seedlings shall be placed in iron boxes filled with isothermal water, each containing about 25 kg of astragalus, and water should be added to cover 12 cm of astragalus, and 50 ml of astragalus protector should be added to the box; the recovered Astragalus, After another isothermal change of water, 30 to 50 grams of the King of Immunity was dissolved in the iron box. After 20 minutes, the yellow peony was found to be apathetic and stingy, and when the floating head did not sink, it should be cleared immediately. Clean up once every 20 minutes, and keep it in the tank for a size of 1 to 2 hours.
3. Density. The seedlings that have been sterilized after strict selection are to be placed in a pool of 5 to 8 centimeters in depth, and 30 kilograms of water per square meter per hour are guaranteed. Due to the need to remove some of the jaundice during disinfection, the stocking density should exceed 20% of the planned seeding rate, and the sturgeons tend to stabilize after 10 to 15 days after entering the pond.
4. Disinfect again. Three days after entering into the pool, drug treatment should be adhered to in order to prevent bacterial, viral infection and physiological dysfunction. The first and second days of immunization with the king of 2 to 3 grams per pool, stop for 3 hours; the third day to protect the gods with 5 to 10 grams per pool, and 3 hours of water.
5. Feeding and feeding. Wait until the yellow pheasant enters the pool and begin to feed it on the second day. The method is to place the bream or fresh fish (ground minced) at the water injection point in the pool according to 0.5% to 1% of the body weight of the quail, so that the yellow locust will follow the water flow. The food that has not been eaten should be removed. If food is not eaten after 7 days, it should be splashed with Baoganing and instant food. Normal feeding: 15 days later, you can start adding powdered compound feed. The ratio of fresh fish to compound feed is 20:1, and gradually increase the proportion of compound feed. After 15 to 20 days, compound feed can basically replace fresh fish. Feeding time is 6 to 7 o'clock in the morning and 5 to 6 o'clock in the afternoon. The total amount of feeding is 3% to 6% of the weight of jaundice.
Fourth, day-to-day management of "fish breeding water." High-density temperature-controlled culture, water and temperature management is particularly important. Fresh water and rich dissolved oxygen are the basic conditions for measuring water quality. The daily dosage of Astragalus is 3% to 6% of body weight. The leftover bait should be removed as soon as possible to avoid contaminating the body of water. If there is still a small amount of bait after the bait has been eaten at the feeding site, it means that the amount of bait should be increased if the amount of bait is too low. Pay attention to the observation of water injection and drainage, injection and drainage should be balanced and smooth, and it is forbidden to shut off water in the reservoir. After the normal eating of Astragalus, we should promptly kill the parasite eggs, and at the same time, mix in enteritis and leeway, and adjust the gastrointestinal function to increase appetite. Every half month or sudden change of weather should promptly use the immune king to sprinkling once. The entire process of breeding should use Baoganing and immunization to improve the disease resistance and detoxification ability of the carcass, so as to ensure the smooth progress of breeding.
Timely removal of residual baits and feces to prevent water pollution corruption, water temperature is generally controlled at 25 ~ 28 °C. If the temperature is too high in summer, deep well water should be filled in the reservoir in time, and warming and keeping warm should be observed in winter. Disease control is the same as other culture modes.

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