First, the special culture of ponds to raise squid summer flowers directly into the summer to develop commercial fish and first-year fish species to develop commercial fish. 1. (Specially cultivated) Xia Xiahua develops commercial fish in the current year: The use of squid summer flowers (or slightly larger specifications) to directly develop commercial fish is a form of farming widely popularized at present, and this farming form needs to be fed adequately. The bait fish has a higher unit yield. (1) Stocking of fish species: In order to ensure the survival rate of breeding, the stocking specification must be more than 3 cm, and generally 3-5 to 25,000 puffer fish species should be reared for 3-4 cm per hectare. (2) Squid fish source: Pond single carp, high density, large amount of bait required, generally can be solved through cultivation pond breeding, breeding pond rearing, natural water fishing and purchase. A. Cultivation pond cultivation: Pre-harvest fish cultivation, that is, 15-20 days before the stocking of sturgeon, use this space to cultivate the pre-harvest bait fish in the pond. Feeding bait fish 7.5 million to 12 million tails per hectare for early feeding; in order to reduce the cost of bait fish, we may consider raising some fast-breeding bait fish parents in the trout pond, if conditions permit, such as Tall tilapia 3000-6000 pairs or 7500 of 2nd-age squid were timely released for each hectare, and their breeding offspring were used as live bait fish for squid feeding; the pond could also be partitioned into two parts with moderate-size dilute nets to raise leeches. When the fish raise the bait fish parent, the larvae that they breed will pass through the dilute net to become the bait of the catfish. The bait fish parent culture is best to adopt the intensive cultivation method to promote the gonad development of the brood, increase the amount of eggs laid, and increase the hatching rate. Trouts continue to provide palatable foods to promote the growth of trout. B. Breeding of breeding ponds: Scale rearing, and the solution to the bait fish mainly comes from special pool cultivation. One-half hectare carp needs to be provided with 3-4.5 hectares of bait fish ponds, and they are to be caught in batches and pulled as required to ensure the growth of bait fish and carp. C. Natural water fishing: If the carp farm is close to lakes, reservoirs and other large water areas, there are abundant bait fish resources that can be fully utilized. D. Purchase: In the case of bait fish production, in the event of low flower rate, disease, or severe weather, etc., the purchase should be organized in a timely manner to ensure the continuity of supply of bait fish. (3) Feeding of bait: In the period of high water temperature and rapid growth of carp, it is better to feed it once a day. After September, the temperature of water drops, the growth rate of carp slows down, and feeding decreases. It can be 5-7 days thereafter. Two-monthly feeding, feeding the amount to maintain a certain bait fish density in the water body, increasing the predation opportunities for squid as the principle. The specifications of the fed bait fish are 30%-59% of the carcass length, and the palatability is good. At the same time, the feeding and growth of the carp are frequently checked, and the difference in the growth of the carp is taken into account. The appropriate amount of the fish is different. The specifications of the bait fish ensure that the catfish are adequate and palatable under feeding conditions. The feed must be disinfected first. (4) Water quality control: The carp is raised in a special pool. Due to the high stocking density and the amount of feeding, the residual bait and the large amount of manure have a great influence on the water quality of the pond. In addition to requiring the pond to enter the drainage system and replace the pool water regularly, the entire breeding process is required. The dissolved oxygen in the water is kept at a minimum of 4 mg/l. It is also necessary to provide an aerator in the eel special pool. In the late spring and summer, every day from 12 to 15 noon, oxygen is turned on. In case of special weather, turn on the sun in the middle of the night. The start-up time is determined according to the specific conditions, and lime water is regularly splashed to regulate the water quality. Other management measures are basically the same as those of fish farming. 2. (Specialized) 1st instar carp species to develop into commercial fish: Carp generally 2 years of age to achieve commercial fish specifications. Under natural water or pond culture conditions, 1st instar catfish can also meet commercial specifications. The climate in the southern region is warmer, the eel has a long growth period, and the eel cycle is relatively short. (1) Pre-stocking preparation: Before the fish species are stocked, they must earnestly clear the pond, dig out too much sludge, renovate the pool pond slope, overhaul the drainage system, and disinfect the ponds to kill harmful bacteria. Parasites. Clear pond can be used bleaching powder, strong chlorine, extermination and other drugs, but with lime as a good, with water (depth of 1 meter) clear pond, per hectare dosage of 1800-2250 kg, the method is to use a small amount of hydrating lime open After the hot pot splashes, you can stock up after the drug has disappeared. (2) Stocking of fingerlings: The tilapia species with better stocking specifications (50-100 g/tail) is better. Generally, 7500-10500 tails are stocked per hectare, and they should be stocked in a season when the water temperature is relatively low (5-6°C). Fish stocking should also be conducted on sunny days. Cold weather and snow weather are not suitable for stocking, so that the fish species will not be frozen or frozen during fishing and handling operations. Fish should be strictly disinfected before going down the pond. (3) Baits: Before stocking, carp species should first be stocked in ponds with a certain number of domestic fish species or wild miscellaneous species. Their specifications do not exceed 60% or less of the length of carp species as bait fish. After 3 months, 5 to 6 times of the weight of the baitfish should be given to the pond. The fish can be used for oysters, quail, oysters, oysters, oysters, etc. It can be no longer fed within 2-3 months, but it should be checked regularly. The squid's feeding situation, after June, is the squid's feeding and growing season. It is necessary to feed large-sized bait fish once a day or 3-5 days to meet the needs of squid growth. (4) Management: Feeding squid adult fish is the same as raising domestic fish. It should also strengthen daily management. There must be someone responsible for it, and as the water temperature rises, the squid grows and new water should be added in phases. Water is added once every 10 to 20 days in spring and autumn, each time adding 30-40 cm of water. Change the water frequently in summer and change the water 5-7 days. If you can maintain micro-flowing water, the breeding effect is better. At the same time, we should do a good job in the inspection of the ponds and disease prevention.
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