Tilapia farming teaching

1. Breeding conditions must be thoroughly cleaned before stocking the seedlings, and other fish, especially tilapia, must be cleared, otherwise there will be four generations in the same house, everyone competing for food and space. Usually use quick lime or tea bran powder to clean the pond, if you use quick lime, dry the pond first, thoroughly discharge the pond water, and then apply quick lime according to 100kg/ mu. In the usual water injection and drainage, it is necessary to filter with a 30-mesh mesh cloth to avoid letting other tilapia into the pond.

2. Stocking density If breeding seedlings, the stocking density of the fish seedlings is 30,000-100,000 tail/mu. If cultured fish, it has two major modes, one is a single breed of pure culture, the stocking density should be adjusted according to the size of the aquaculture water body, ventilation and light, adequate feed, to the water depth of 3m, the area of 10-20 acres of fish pond as an example, the stocking density is 2000-3000 tail/mu, a year can be raised to 1.25kg/ tail. At the same time, it is necessary to support the stocking of bighead fish and Bream 20-30 tail/mu each to regulate the water quality, stocking some ophiocephalia or catfish to prevent the pond from being cleaned thoroughly, or mixing other varieties of tilapia and wild fish in the pond when drainage and irrigation water. The second is three-dimensional multi-species mixed culture, mainly the fish is mixed as omnivorous fish in the breeding of traditional four fish, famous and excellent ponds, to remove residual feeding and feces. The stocking density of this model is 500-1000 tail/mu.

3. The feeding intensity center is to feed the full feed. The first is the preferred feed, rather than choose feed manufacturers to choose feed, to choose the brand feed produced by big factories and old factories, high safety factor. Secondly, in the submerged material, semi-submerged material and floating material, the floating material is preferred. Feed should be fed regularly, fixed point and quantitatively. Two meals a day, 10 am, 3 PM. High temperature summer, especially when the weather is stuffy, can not be fed to avoid the fish to eat too much, and the lack of dissolved oxygen at night will damage the digestion and absorption function of the fish's stomach.

4. Day-to-day management centres on the regulation of water quality and improvement of the underlying environment. In the morning and evening, we should visit the fish pond, see the water color, smell the water, observe the activities of the fish, and prevent the oxygen shortage of the fish, especially when the weather is hot, once the fish floating head is found, the aerator should be turned on in time. If it is found that the water quality is too fat, it is necessary to reduce the feed feeding, inject new water to reduce the concentration of water or change the water, especially in summer, to deepen the aquaculture water level. Pay attention to observe the pond base and drainage and irrigation water outlet, and prohibit other tilapia from mixing into the fish pond. At the same time, pay attention to improving the bottom environment, to create a good ecological environment for the healthy growth of fish.

5 Disease prevention and control the fish not only grow fast, large and strong disease resistance, usually less disease or even not sick, generally due to fishing or transportation caused by scratches, damage, easy to be infected by bacteria and die, especially when the weather is cold, fishing or long-distance transportation is easy to get water mold; On the day when the fish fry go into the pond, the whole pond should be sprayed with iodine or chlorine preparation water.