Two farming techniques

1. Pond Intensive Breeding Intensive Breeding Wujing has been popularized in Zhejiang, Guangdong, and Shandong, and has achieved good breeding results. The per mu output can reach 5,000 kilograms.
Ponds require an area of ​​about 1 mu and a maximum of 1.5 mu. Pool depth of 2 to 2.5 meters, water depth of 1.5 to 2 meters, pond pool above the water 0.5 meters. Water quality requirements are neutral or slightly alkaline. Intake and drainage outlets are equipped with strict anti-escape facilities. The ponds are fenced with bamboo fences or fish nets. The plants are planted around the pond and have a width of 0.8 to 1 meter. The area of ​​aquatic plants does not exceed 25% of the pond area.
15 to 20 days before stocking and pond clearing, 100-150 kilograms of fresh lime per acre is used to completely disinfect the ponds, water is infused after 1 week of exposure, and fish are stocked after 10 days of influent. Before disinfecting, dig the mud with iron gingiva to catch the original black worm in the pond.
When the fish species are released between 10 and 20 cm, they will be divided into 2 to 3 divisions to ensure that the specifications of the same batch of cultured black earthworms are neat and that they will be fed for one day before each division. After the fish grows to 20 cm, it is put into a large pond to grow fish. The fish species were stocked from June to August, and 1 winter fish species was stocked from March to April. When the water depth is 1.7 to 1.8 meters, the number of stocking fish per square metre is 6 to 8 centimeters in length and 15 in length; body length is 10 to 12 centimeters and 13 to 14 tails; body length is 14 to 16 centimeters and 12 tails are released. For ponds with insufficient feed, shallow water, poor water quality, and inconvenient water supply, reduce the stocking density appropriately. Fish species are sterilized with 2% to 3% salt water for 10 to 15 minutes before stocking.
Feeds Feeds Feeds can be fresh animal feeds based on wild small trash fish, but also artificial feeds. Adhere to the "four set" feeding principle. It is usually fed twice a day, the first time in the morning at 8 to 9 o'clock and the second at 4 to 5 o'clock in the afternoon. Small trash fish and shrimps are gradually thrown in the feeding area. The feeding area is surrounded by bamboo worms to form a box of 9 to 16 square meters. The artificial compound feed is to be set on the food table. The food table is 1 meter away from the pool and the water enters the water. Depth 20 to 30 cm. At the initial stage of stocking, the amount of fish fed was 8% to 10% of the body weight of U. pumila, and when the length of U. pulcherrimus was about 150 grams, the amount of feeding was reduced to 6% of the body weight of U. pumila, and then 5% of the body weight of Uchigoia. ~8% feeding.
Routine management adheres to the patrol pool once in the morning and evening every day to observe the changes in the feeding, activities, incidence and water quality of the Chinese wolfberry, and to find out problems and take timely measures. Frequent changes to water during the hot season, the early stage of adult fish breeding, changing water by one-third per week, changing the water once every two weeks, changing the water by four-fifths.

2. The home fishpond family raising fish pond requires the pond pond of the home fish pond to be high, and the bottom of the pond should have proper sludge, but it should not be too thick and thick, which will result in a low catch rate and affect the second year of home fish breeding. Drainage and irrigation are convenient, ensuring the pool water and fertilizer are new, and timely adjustment of water quality and drainage and fishing.
Black mullet species stocking (1) requirements of black mullet species. It is necessary to follow the principle that the species of black bream fish is less than half of the size of the species of the pond fish. Under this premise, the bigger the species size of the black bream is, the better. From the situation of the breeding of black plover across the country, the size of the commonly used black bream fish is 4 to 13 cm, of which 8 to 10 cm is the maximum. The fish species are required to be robust, disease-free, non-injury and undisturbed. The specifications of the fish species raised in the same pond are the same. (2) Time of stocking of black oyster fish. The stocking time of black frog species is generally 2 to 3 months apart from the main species. In the north of the Yangtze River in the province, the species of black mullet was stocked from June to early July, and the area south of the Yangtze River was stocked from May to June. The time for the stocking of black bream fish species cannot exceed 7 months at the latest. If it exceeds 7 months, the black mussel grows at the end of the year when the main fish is harvested. (3) The amount of stocking. The stocking of black mullet species is not only related to the specifications of the black mullet species, the amount of wild fish in the breeding pond, but also related to the species of the main fish, and it is mixed with species with self-breeding capacity (carp, mackerel, tilapia, etc.). In the pond, black bream fish can be properly put. Under normal circumstances: every year 50 to 150 grams of fish, acres put 10 to 20; when the fish species 12 to 15 cm, acres put 20 to 30; 8 to 10 cm, mu put 40 to 50; 3 to 6 cm , Mu put 60 to 100 tails. According to the practice, it is appropriate to control the yield of Wuqi per mu from 10 to 15 kilograms.
After feeding the polyculture pupa in the home fish pond, the weight of the pupa should be taken into account when feeding the main fish. Appropriately increased part of the feed is not for the black buckwheat to feed, but is provided for the natural feed fish in the pond to eat, and promote the breeding and growth of feed fish. Forage fish feed on blackbirds, which is an indirect method of feeding.
The aquatic plants for stocking aquatic plants should be stocked with appropriate amount of floating aquatic plants, such as water peanuts, water hyacinths, water lettuces, etc., which can be used as breeding places for wild fish and insects, as well as shade and regulation. The role of water quality. The stocking area should not be too large, and should generally not exceed one fifth of the aquaculture surface. Aquatic plants are stocked in shallow water areas of ponds or around pond water surfaces. Excessive planting area causes excessive water quality and reduces dissolved oxygen, which affects the growth of the main fish.
Anti-escaped Wushao is good at walking and jumping against the water; therefore pond pond ponds with polycultured Wusong must be at least 40 cm above the surface of the water. It is best to guard against escape on the surrounding ponds, and install anti-escape facilities at the inlet and outlet. After heavy rain, special attention should be paid to checking whether the anti-escape facilities are intact.
Avoid use of ferrous sulfate and black wolfberry is very sensitive to ferrous sulfate, will cause a lot of death after use. Therefore, in the breeding of fish ponds in Wuchi, the main pond to prevent and control diseases, can only use copper sulfate or trichlorfon and other agents, avoid using ferrous sulfate.
The dry pond fishing home fish pond is mixed with black locusts. When winter fishing is marketed, dry ponds must be plucked from the razor clams. If not, it will affect the second year of home fish farming. In order to prevent unclean fishing, it is necessary to use drugs to kill the remaining black locust when cleaning the dry pond.

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