Brazil bran is a new breed of freshwater aquaculture imported from Brazil in 1996. It has wide adaptability, rapid growth, strong disease resistance and high economic value. The hybrid rice bran is produced by the southern bigmouth owl (father) and the southern native cricket. (Mother) made from crosses with excellent quality. In May 2000, the new urban fishery service station in Yizheng City, Jiangsu Province, was introduced by the Jiangsu Provincial Institute of Freshwater Fisheries with the introduction of the Brazilian cockroach and the hybrid cockroach, and a polyculture experiment was conducted. After more than three years of cultivation, it has achieved certain results. The relevant breeding techniques are summarized as follows:
I. Pond conditions Brazilian and hybrid crickets require low requirements for pond culture. In general, the pond area is 4.0 mu, the average water depth is 1.5m, the silt thickness at the bottom is 12cm, the pH value of the water body is 7.2, the water source is sufficient, the water quality is fresh and non-polluting, and the drainage and drainage conditions of the pond are convenient.
Second, seed stocking
1. Qingtang fertilizer water. The pond was sterilized on April 20 in Qingtang, and the amount of quicklime was 50kg/mu. After the pond was filled with water, the base fertilizer was applied 15 days before the bottom of the fish pond to breed natural food organisms. The amount of chicken manure was 300 kg/mu. When the fish fry under the pond, the color of the pool water is dark brown or oil green, and the transparency of the water body is about 30 cm.
2. Stocking density. The specifications for overwintering species of Brazilian silk are 10 tails/kg--12 tails/kg, and 250 tails per mu; stocks of hybrid summer shrubs are stocked with 250 tails per acre; freshwater tails with a stocking size of 20 tails/kg are 250 tails/ Mu, with a size of 10 tails/kg--15 tails/kg, 200 tails/mu (1:4).
3. Fingerling disinfection. After the seeds are introduced, the fish body is disinfected with 5% salt water and bathed for 10 minutes to 15 minutes.
Third, feed and feeding
1. feed. Brazilian braises under artificial rearing conditions have a wide range of feed sources and are mainly fed with bran and seed cakes. Hybrid brazier is mainly animal feed and mainly feeds livestock and poultry waste (mainly chicken intestines).
2. Feeding. Adhere to the "four principles" principle, the adult stage of fish according to the weight of 3% - 5% feeding, fed twice a day, the amount of feed in the morning accounted for 40% of the total feed fed the day.
Fourth, daily management
1. Water quality regulation. In summer, the weather is changeable and the water quality is prone to change. When the pool water becomes thick, yellow, white, and black, it indicates that the water quality has deteriorated, and new water should be added in time to regulate the water quality. At the same time, the rational use of quicklime can adjust the pool water, such as the pool water is oil green, brown green, brown, brown and yellow, the water is fat and cool, not cloudy, about 30cm in transparency, can not change the water.
2. Observe the patrol pond. Inspect the pond three times a day. In the morning, observe the fish’s activity and presence of floating heads. In the afternoon, check the fish’s activities and feeding conditions. In the evening, check whether there is any remaining feed in the pond and whether the fish has floating head signs. When the weather changes abruptly, it is necessary to inspect the pond at midnight to prevent the fish body in the pond from lacking oxygen.
V. Summary and discussion Brazilian quail and hybrid cricket are new species of freshwater aquaculture with fast growing speed, short breeding cycle, little disease, and high efficiency. They are all hot-water fishes and have the common advantage of short growth cycle. The disadvantage is that the species of brazilian and hybrid crickets do not normally overwinter, resulting in high fish prices and increasing production costs.
I. Pond conditions Brazilian and hybrid crickets require low requirements for pond culture. In general, the pond area is 4.0 mu, the average water depth is 1.5m, the silt thickness at the bottom is 12cm, the pH value of the water body is 7.2, the water source is sufficient, the water quality is fresh and non-polluting, and the drainage and drainage conditions of the pond are convenient.
Second, seed stocking
1. Qingtang fertilizer water. The pond was sterilized on April 20 in Qingtang, and the amount of quicklime was 50kg/mu. After the pond was filled with water, the base fertilizer was applied 15 days before the bottom of the fish pond to breed natural food organisms. The amount of chicken manure was 300 kg/mu. When the fish fry under the pond, the color of the pool water is dark brown or oil green, and the transparency of the water body is about 30 cm.
2. Stocking density. The specifications for overwintering species of Brazilian silk are 10 tails/kg--12 tails/kg, and 250 tails per mu; stocks of hybrid summer shrubs are stocked with 250 tails per acre; freshwater tails with a stocking size of 20 tails/kg are 250 tails/ Mu, with a size of 10 tails/kg--15 tails/kg, 200 tails/mu (1:4).
3. Fingerling disinfection. After the seeds are introduced, the fish body is disinfected with 5% salt water and bathed for 10 minutes to 15 minutes.
Third, feed and feeding
1. feed. Brazilian braises under artificial rearing conditions have a wide range of feed sources and are mainly fed with bran and seed cakes. Hybrid brazier is mainly animal feed and mainly feeds livestock and poultry waste (mainly chicken intestines).
2. Feeding. Adhere to the "four principles" principle, the adult stage of fish according to the weight of 3% - 5% feeding, fed twice a day, the amount of feed in the morning accounted for 40% of the total feed fed the day.
Fourth, daily management
1. Water quality regulation. In summer, the weather is changeable and the water quality is prone to change. When the pool water becomes thick, yellow, white, and black, it indicates that the water quality has deteriorated, and new water should be added in time to regulate the water quality. At the same time, the rational use of quicklime can adjust the pool water, such as the pool water is oil green, brown green, brown, brown and yellow, the water is fat and cool, not cloudy, about 30cm in transparency, can not change the water.
2. Observe the patrol pond. Inspect the pond three times a day. In the morning, observe the fish’s activity and presence of floating heads. In the afternoon, check the fish’s activities and feeding conditions. In the evening, check whether there is any remaining feed in the pond and whether the fish has floating head signs. When the weather changes abruptly, it is necessary to inspect the pond at midnight to prevent the fish body in the pond from lacking oxygen.
V. Summary and discussion Brazilian quail and hybrid cricket are new species of freshwater aquaculture with fast growing speed, short breeding cycle, little disease, and high efficiency. They are all hot-water fishes and have the common advantage of short growth cycle. The disadvantage is that the species of brazilian and hybrid crickets do not normally overwinter, resulting in high fish prices and increasing production costs.
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