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1. Pond culture In production, pond culture Ao tilapia has both polyculture and monoculture modes.
1.1 Polyculture In the conventional stocking of carp, squid, grass carp, carp, carp, carp, the fertilizer pond is equipped with 700 to 1000 tails per acre, and 300 to 500 tails per acre of thin pools. ) The combined fertilizer and feed-rich fish ponds can be increased to 2000-3000 tails/mu, which can increase production by 1000-1500 kg/mu.
1.2 Single-fertilizer ponds are stocked with 5000 to 7,000 tails/mu, 3,000 ponds/acre of thin pools, and the output can reach 2000 to 3000 kg/mu.
1.3 Polyculture and monoculture feeding and management Ao tilapia is omnivorous fish, like to eat plankton, organic debris and artificial feed, so in the management of feeding is mainly fertilization, feeding and daily management. 1 Fertilization: Feeding Aureus tilapia, either monoculture or polyculture, requires fertile water. The plankton in the fertilizer water is abundant, and the fertilization is to cultivate plankton for O. tilapia ingestion, and the sinking residue of the fertilizer can be directly used as the food of A. tilapia. Therefore, in the case of guaranteeing that the dead fish will not be depleted by oxygen, regular fertilization should be carried out to keep the water quality fertile and the transparency should be 25 to 30cm. Fertilizer can be used for various fermentation of manure and green manure, weekly manure 200 ~ 300 kg/mu or green manure 300kg/mu. Fertilization should master the principle of less and less labor. The number and frequency of fertilization depends on the water temperature, weather, and color. The water temperature is lower, the amount of fertilizer can be more, and the frequency is less; the water temperature is higher, the amount of fertilizer is less, and the frequency is more. Rainy, sultry thunderstorms, less or not Shi Shi, Tianqing more appropriate Shi. The water color is oil green or dark brown and can be applied with little or no fertilization; the water color should be applied more lightly; 2 feeding bait: pond fertilizing and nurturing natural foods can not meet the growth needs of Ao tilapia, but must also feed enough artificial bait To get high yields. Generally every day at 9 a.m. and 14 a.m., each feeds the bait one time, the bait should be fresh, and the rotten spoiled bait cannot be fed. Soybean cake, rice bran, etc. must be soaked before feeding. The bait should be placed in a fixed food place. The amount of bait to be eaten each day depends on the fish's diet, water temperature, weather, and water quality. Generally, each meal is eaten within 1 to 2 hours after feeding, and it can be fed as appropriate. If you do not eat it on time, you should feed less or stop feeding. On sunny days, the water temperature can be higher and feed more properly; on rainy days or when the water temperature is low, feed less; feed should be stopped before and after the weather is hot or thunderstorms. Normal fertilizer can be fed normally, water quality should be fed more, water and fertilizer should be fed less; 3 daily management: Morning and evening to visit the pond, observe the fish's food and water quality changes, in order to determine the number of feeding and fertilization. It was found that the floating head of the fish is serious and it is necessary to add new water or increase oxygen in time to improve the water quality.
2, cage culture cage culture Ao tilapia has compact, intensive, high yield, flexible and simple advantages. Localities can use cages, reservoirs, rivers and other large and medium-sized water surfaces to set up cages for stocking. The net cages were made of bamboo and wooden scaffolds, and polyethylene mesh nets were used as boxes. The rectangular net cages were 5m in length, 4m in width, and 2m in height. The density of stockings of Onyx is 50 to 70 tails/cubic meter. If Anoxial fish is used for polyculture of other fish, the proportion of other fish is 5 to 10%.
Feeds containing more than 28% protein-based pellet feeds are used. They are distributed daily at 9:00 am and 17:00 pm. The feed conversion factor is approximately 1.7-2. Fish cage fish precautions: First, choose a water source, water level, water quality, good water quality, set the cage where the local wind and waves should be small, the trend is slow, inorganic ships and other obstacles to and from interference; Second, ground management, strict inspection, timely Clean the debris on the net clothes to make the cage flow smoothly, and the dissolved oxygen is sufficient. Third, do a good job of preventing enemy evils (such as water snakes, rats, etc.), anti-theft, anti-escape, wind protection, flood prevention, etc. to ensure cage fish farming Going smoothly: Fourth, try to do it as little as possible. Feeding 2 to 4 times a day, the daily feeding amount is generally within 3 to 10% of the fish body weight for appropriate changes. According to the weather, water temperature, water quality, and the fish's food intake, etc., the amount of feeding is flexible.
O. tilapia commercial fish rearing technology
The commercial fish rearing technology of Aoni fish is basically the same as that of conventional farmed fish such as the four major fishes, squid, and squid, but it should be noted that the Oini fish are characteristic of tropical fish and the stocking temperature should be above 16°C. There are two main feeding methods: