Shrimp ponds provide good sea turtles

Using the ecological habits of sea bream, the production of sea bream in the early stage of prawn farming and shrimp rearing in the latter stage can not only provide more than one pond, support two birds with one fish, but also avoid the outbreak period of shrimp epidemics and increase the pond utilization rate and aquaculture efficiency. It is an adjustment of marine aquaculture. Structure, one of the powerful measures to increase aquaculture income. The technical measures for the use of early-season cultured sea bream in shrimp ponds will now be described as follows: 1. Preparation of jellyfish seedlings before stocking 1. Clear pond disinfection 15 days before seed stocking, 30 to 50 grams per cubic meter of bleaching powder or 75 kg per mu for quicklime ~100 kg for Quanchiposa, and then filtered with 40 mesh to 60 mesh sieve net, water depth of 1 meter. 2. After one week of fertilizer and water application, depending on the condition of water and fat, basic fertilizers are cultivated with compound fertilizer, and generally 1 kg of compound fertilizer and a small amount of urea are used per mu. Second, the jellyfish stocking 1. Stocking time Water temperature can be maintained at about 18 °C can be placed, generally in late April. 2. The stocking size of the jellyfish seedlings is about 1 cm. 3. Stocking density According to the depth of the pond, generally 500 to 1000 acres are placed. III. Aquaculture management 1. Water quality management After the seedlings gradually adapt to the pond environment (about 7 days), the pond begins to add water (mainly to change little water, change ground water frequently), and the amount of water added every day for 10 days is kept in the total water body. In less than 15% of the time, after the individual grows, the amount of water is gradually increased. The amount of water exchanged per day is 10% to 30% of the total body of water. When changing the water, you should pay attention to the import and export flow can not be too urgent to prevent injury. 2. Cultivation of basic bait Begonia culture does not require manual feeding. The proper bait biomass in the water body is the best condition for the growth of Begonia. Every day, we must carefully observe changes in the pond water environment and water color, and timely fertilize and cultivate basic bait. The condition can be used to build a copepod culture pond, that is, to form a culture pond with 80 mesh sieve net at one end (or corner) of the pond, and the area accounts for 1/20 of the total pond. Each application of green manure 100 kg/mu ~ 250 kg/mu, cow dung 300 kg/mu ~ 400 kg/mu, human urine 150 kg per mu/mu ~200 kg, ammonium fertilizer 1.5 kg ~ 2 kg per mu. After every 10 days to 15 days, topdressing once, half the amount of topdressing. By cultivating the pool, the copepods can be caught in the culture ponds and the deficiency of the bait in the pool can be supplemented in time. Fourth, the harvest time after 60 days to 70 days of breeding, generally at the end of June, early July harvest can be listed.