Cultivation of astragalus in plastic greenhouses can be continuously produced throughout the year. Soilless aquaculture can effectively control diseases and increase the benefits exponentially. I. Construction of aquaculture ponds: (1) Open culture ponds are suitable for the construction of ponds where there are running water for a long time. The aquaculture ponds are made of bricks and cement. Each pond has an area of ​​10-20 square meters, the depth of the pond is 40 centimeters, the width is 1-2 meters, and the pond is 20-40 centimeters wide. In the relative position of the pool, two inlet pipes and one drain pipe with a diameter of 3-4 cm are provided. The height of the inlet pipe and the pool bowl is the same, the height of the drainage pipe is 1 and the bottom of the pool, and 1 is 5 cm above the bottom of the pool. Metal meshes are installed at the inlet and outlet pipes to prevent escape. Arrange several parallel aquaculture ponds into one unit, each with an area not exceeding 500 square meters. (2) Closed-cycle filter culture ponds. Suitable for use in places lacking water. The method for building aquaculture ponds is the same as that for open culture ponds. In addition, aeration tanks and sedimentation tanks must be built to increase some clean water, pumping, and heating equipment. 2. Construction of greenhouses: The construction of plastic greenhouses is the same as that of ordinary greenhouses. It is better that each unit is placed in the same greenhouse to facilitate management. 3. After stocking, after the pool is built, the total drain shall be plugged, filled with water and soaked for 5-7 days, the water shall be drained, and then the drain pipe leveled with the bottom of the pool shall be plugged, and the water shall be kept in each pool. Micro-flowing water, water depth 5 cm, then stocking. Before stocking, the liquid preparation shall be prepared with a ratio of 8 g of copper sulfate and 10 g of bleaching powder per cubic meter of water, and the mixture shall be fully stirred. After the drug is dissolved, it shall be soaked in the liquid for 20-30 minutes (water temperature 10- 15°C). After the worms have been sterilized, they should be stocked in time. Each metre of rice should be 4-5 kilograms per kilogram of 35-50 oysters. The same species as the pool must be the same size. Fourth, feed feeding: After 2 to 3 days of stocking, aphid, snail, frog meat, etc., chopped, placed on the food table to tame food, and increase the water flow. The first feeding amount can be 1-2% of the total weight of Astragalus. The next morning check, if all can be eaten, the feeding rate can increase to 2-3% at the next feeding, and the feeding rate gradually increases to about 5%. With the increase in the amount of food for yellow buckwheat, cocoons, fly maggots, cooked animal viscera and blood meal, fish meal, bean cake, rapeseed cake, bran, rice bran, melon husk, etc. can be added to the feed until they are completely fed with artificial feed. The protein content of the feed should be 35-40%. When Huangpi eats normally, it should be fed once a day at 8-9 am and 2-3 pm. Fifth, daily management: culture of yellow quails in plastic greenhouses, as fresh water, as long as adequate feed, jaundice generally do not escape, but we must pay attention to prevent rats, snakes and other natural enemies harm. After rearing for a period of time, when the size of the yellow locust in the same pond is uneven, keep it separately in time. Astragalus can be marketed for 5-6 months, with a specification of 6-10 pieces per kilogram and a survival rate of more than 90%. The optimum growth temperature for Astragalus is 27-30°C. The use of plastic greenhouses does not require special heating equipment. This temperature is easily maintained in spring, summer and autumn sheds. Even in the cold winter, the temperature in the shed can reach an average of 20°C. Micro-flowing water is maintained in the rearing pond and water quality will not deteriorate.
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