Red tilapia breeding techniques

Red tilapia cultivation technology Red tilapia has a high adaptability, the feed is easy to solve, and the population has a high yield. It is very suitable for high-density culture of ponds, polyculture, cages and flow pools. The main pond raising yield can reach more than 1,000 kg per mu. The small cage breeding yield can reach 100 kg/m3 or more. First, the culture conditions of red tilapia have strong adaptability to water quality. Both new and old, deep and shallow ponds can be cultured. High-yield ponds require good water source, pH 6.8 to 8.5, salinity 0 to 20%, and convenient irrigation and drainage. , an area of ​​4 to 10 acres, water depth of 1.3 to 2.5 meters, and equipped with 1 to 2 sets of 1.5 kilowatts impeller aerator. Second, seed stocking Every spring, when the water temperature rises above 15°C, the winter seedlings will begin to be stocked. Before stocking, ponds should be disinfected. 75 to 100 kg of quicklime dry poison ponds can be used per mu, and about 5 to 7 days of toxicity can be used. After the disappearance, the red tilapia species are stocked. The main pond raises generally 1,500 to 3,000 red tilapia species per acre, and 40 to 70 tails of polyculture species in order to control water quality. Flowing water can raise 5000 to 10,000 acres per mu; when mixed with other fish, Acre can be put 200 ~ 500; cage breeding general stocking 150 ~ 350 / m 3, in order to reduce the loss of female litter on the bait, increase growth rate, it is best to stock all male red tilapia seed, but also Individuals with mixed polyculture have control over the species of carnivorous fish such as the small red plover and Californian quail. As the red tilapia seedlings are vulnerable to stab wounds, they are soaked with 3% salt water during stocking to heal wounds and prevent infection. 3. Feeding management Red tilapia can ingest various commodity feeds and biological feeds in ponds. The main feed should be fed with full-priced tilapia compound feed. The content of crude protein in feeds is appropriate from 28% to 32%; Qualitative, quantitative, timed and localized “four-determined” method feeding, the daily feeding amount is calculated from 3% to 5% of the fish’s body weight, fed twice a day, and increased according to the weather, water quality, and feeding conditions. Less. 4. Water Quality Management During the process of high-density fish farming, fish excrement and leftovers are liable to cause deterioration of water quality. Therefore, proper adjustment of water or fresh water should be applied to the fish pond to adjust the water quality to keep it light brown or oil green. , Transparency 20 to 25 centimeters. Can be used with 15 to 20 kg of lime per acre on the whole pool, 1 or 2 times per month, adjusting the pH of the pool to slightly alkaline. The use of beneficial microbial preparations to improve the microbiological structure of ponds, control harmful substances in ponds, improve water quality, and prevent disease better. Fifth, fish disease prevention and control of red tilapia disease resistance, normal breeding management conditions rarely get sick, but in poor breeding conditions will also die, affect the survival rate. In winter and spring season, frostbite, transport, and injury caused by catching and catching are easy to cause watery mildew, and should be avoided as much as possible. The main disease in high temperature season is septicemia caused by Aeromonas hydrophila. The disease is mainly caused by infection of conditional pathogenic bacteria caused by deterioration of breeding water quality, hypoxia, poor feeding, etc. The disease can be treated with oral Kanamycin Treatments such as Suspension, Ofloxacin, etc. are administered at a dosage of 3 to 6 grams per day for every 100 kilograms of fish and fed for 5 days. Prevention and treatment of fish diseases should adhere to the principle of prevention, maintaining good water quality, and managing daily feeding and feeding is the key to disease prevention.

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