First, the cultivation of large-scale summer fish species
The cultivation of large-scale summer fish species refers to the process of rapidly rearing large-scale fish species of 5-6 cm in size in 15 to 20 days after the larvae were cultivated into larvae. Large-sized summer fish species can be immediately farmed in ponds, cages, fences, and other types of adult fish, and they can develop commercial fish that year.
1. Selection and clearing of fish ponds. The selection and the clearing of the fingerling pool is basically the same as the fry pond, with an area of ​​0.1~0.3 hectares, with a water depth of 1~1.2 meters. Before use, it must be carefully cleaned and thoroughly disinfected. 2. Base fertilizer. In the first five to seven days before the stocking of fish species, mixed manure is usually produced by composting 4,500 to 6,000 kilograms of manure and 3,600 kilograms of green manure per hectare, or 4,000 kilograms of livestock manure, 4,500 kilograms of green manure, and 80 kilograms of quicklime. 3. Fish stocking. Fish species are stocked as early as possible to prolong the growth period of the species. Stocking densities range from 90,000 to 120,000 tails per hectare. Single-cultivation Jianye generally does not mix other fish. Fish species should be robust and have neat specifications. 4. Feeding management. After Wucai Down Pond, due to the small fish body, it still needs to feed a few days of soybean milk. Soybean milk was splashed and the bean dregs were fed by the pool and fed twice a day. A few days later, the bean curd paste was changed and cast in a fixed position near the pool. About 3-4 kilograms per 10,000 fish were used per day.
Second, the cultivation of one-year-old fish species
1. Fish stocking. The cultivation of Jianye first-year fingerlings is to cultivate summer fish species (about 3 cm), and after the ponds are divided, they will raise about 150,000 fish per hectare and develop winter or spring fish. Mixed cultures can also be used to build the main summer flowers, mixed fish, grasshoppers, earthworms and other fish species. Each hectare can be stocked with 90,000 to 100,000 tailed oysters, and 45,000 to 60,000 tails of grasses, cormorants and squid. 2. Feeding management. Jianou is an omnivorous fish. In addition to feeding concentrate, the leaves and benthic organisms are all foods that they like to eat. Pingsha is often given, and the effect is also very good.
Third, adult fish breeding
1. Pond conditions. The area of ​​the fish pond is 0.3-1 hectare, and the maximum is not more than 10 hectares. The ponds where the main culture is built should be below 0.5 hectares and the water depth is 2 to 2.5 meters. The water sources should be sufficient and the water quality should be good. 2. Fish stocking and feeding management. Fish species are generally stocked in winter or early spring. Summer fish species were stocked in May and June. The fish stocks to be stocked should have a healthy body, and the requirements for stocking in the same pond should be the same. The specifications should be neat, and should be enough at one time. In the high-yield adult fish ponds that are mainly squid, 12,000 to 18,000 squid species can be stocked per hectare, and a small amount of squid and squid are raised. The output can reach about 7,500 kilograms. 3. Jianye farming. In the production of adult fish, Jianye is generally used as a breeding breed. In the high-yield ponds of adult fish that are mainly carp, the ponds with rich fertilizer sources and relatively water quality can raise carp. The proportion of stocking is roughly: 60% for carp, 10% for carp, 10% for grass carp, 10% for carp and carp, and 10% for carp. The high-yield ponds of adult fish, mainly grass carp, have abundant water resources, abundant resources such as water grasses and dry grasses, and low grass carp pellet feed prices. In regions where the source is sufficient, grass carp can be the dominant species. Grass carp and head lice account for 60%, carp 25%, carp 5%, and Jianou 10%. In the high-yielding ponds of adult fish, which are mainly raised by herring, close to the Great Lakes and areas rich in snails, herring can be used as the main breeding object. However, carp and herring eat the same feed and there is a certain contradiction between the two. Therefore, in the pond where the main herring is raised, the stocking size of the herring should be smaller, preferably 10 to 15 centimeters, and the quantity should not be much.
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