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First, the pond conditions should be suitable for general ponds can be carried out Brazilian quail breeding, which is sunny leeward, adequate water, fresh water without pollution, convenient drainage and drainage of the pond is better, an area of ​​600 square meters to 3,000 square meters, the maximum does not exceed 6500 Square meters, water depth 1.2 meters to 1.8 meters is appropriate. Before the fish species are stocked, the conventional clear pond fertilizer and water treatment is performed and an aerator is equipped.
Second, seed stocking should be reasonable
1. Qingtang fertilizer seedlings must be sterilized in clear ponds from 5 days to 7 days before the lower ponds are used to remove wild fish and apply basic fertilizers to breed natural foods so that there will be abundant foodstuffs immediately after the fish ponds.
2. Reasonable stocking of Brazilian sea bream with 1200 to 1,500 fishes per acre, and about 100 rearing fishes. After 4 months to 5 months of feeding, Brazil can weigh up to 350 grams to 500 grams per tail.
3. Strictly sterilize the stocking time of Brazilian cockroaches generally at the beginning of May, and maintain the water temperature at about 15°C to release seedlings. Fish species should be sterilized by drug dipping before stocking. Generally, potassium permanganate 10 mg/L can be used for 30 minutes.
Third, bait feeding science
1. Choose the bait Brazilian bran is a plant-based omnivorous fish, and it is very bulimia. Under artificial rearing conditions, the feed source is very wide and can be fed rice bran, bean cake, bran, bean dregs, peanut cake, sugar cane, distiller's grains, and a small amount of fish meal, cocoon powder and so on. In the pond where the main Brazilian quail feeds, it is best to feed the whole grain pellet feed of quail and bream.
2. Scientific feeding of general juvenile fish feeds at 8% to 10% of the fish's body weight. The fry period is 5% to 7%, and the adult fish stage is 3% to 5%. Feed twice a day, that is, 40% of the feed for the whole day at 8 a.m. and 60% for a feed at 4 p.m. Because Brazil is not as good as squid and tilapia, the feeding time should be longer, about 40 minutes to 60 minutes. The body length and weight of the fish are generally measured every 20 days in order to adjust the feeding amount in time.
Fourth, daily management should be strengthened
1. Pay attention to the quality of water to adjust the water to oil green, dark brown as the best, about 30 cm in transparency is appropriate. If the pool water is too thick, yellow, white, black, etc., new water should be added in time to regulate the water quality. In addition, once every 20 days or so, the whole pool is splashed with quicklime to prevent disease and regulate water quality. Since the fastest growing stage of Brazilian cockroaches is from June to September, which coincides with the high-temperature season, as the amount of food is increased and excretions increase, the water in the pool tends to turn to fat and deteriorate, and the water should be changed in time; for example, the water is green and brown. , not cloudy, transparency is about 30 cm, you do not need to change the water. In addition, it is possible to improve the water quality and increase the vegetal food by feeding it regularly.
2. Pay attention to the prevention of fish diseases in Brazil. In addition to the low water temperature period due to infection of aquatic mold due to operational damage, no fatal or affecting growth fish disease has been found in the adult fish breeding stage. Illness causes the fish to lose weight and even die in large numbers. When the disease occurs, 0.5ppm copper sulphate and 0.2ppm ferrous sulfate can be spilled in Quanchipiti. Stage of fish susceptible to white skin disease, can be used 0.3ppm "strong chlorine" Quanchiposa, have better results. In artificial breeding, the fish seedlings can be immersed in 10 ppm potassium permanganate for about 30 minutes in front of the fish pond or 20 minutes to 30 minutes in furazolidone 2 ppm. Specific bathing time depends on the tolerability of the fish. During the cultivation process, 10 ppm lime is splashed every 20 days to 25 days for disease prevention and water quality regulation. On the day of fry stocking, Quanchiposa Fish and Pepper 0.5ppm and furazolidone 0.2ppm (alternative use of the two drugs) once a day, even for 4 days, can prevent fish diseases. Brazilian earthworms are very sensitive to organophosphorus pesticides such as trichlorfon and malachite green. Therefore, the use of such drugs should be prohibited in the prevention and treatment of fish diseases, but furazolidone, oxytetracycline and methylene blue can be used.
Breeding of Brazilian cockroaches
Brazilian bran, also known as South American salmon, is a scientific name for small mouth lice. It has strong adaptability, fast growth, wide appetite, strong disease resistance, easy catching, tender meat, and high economic value. It is suitable for promotion in southern China. It is generally believed that the cultivation of ponds in the Brazilian seabass is mainly cultivated and supplemented with white peony, yields are high, and good results are obtained. The key points for pond high yield technology are briefly described.