I. Preparation before stocking
Before the summer flowering, the ponds should be sterilized. It is best to drain the pond for about 20 days, and then fill the water with 10 cm. Discard the whole pond with 100-150 kg/mu of lime slurry, and fill the pond 1.2 meters after one week. One week before the summer flowering season, stir the fermented water for 3 days with 10%-20% of EM biological preparation, and apply 30 kg/mu into the pond water to cultivate the natural plankton feed. If the time is tight, bleachers or alternatives should be used to clear the pond.
Second, stocking
First, put the oxygen bags of the seedlings into the surface of the pond for 30 minutes. If the weather is high on a sunny day, use a large basin to take the pool water, slowly pour the fish into the basin and neutralize the water temperature twice. The detected temperature difference does not exceed 2°C. Put in the pond. Acre 08000-10000, can be bred into winter specifications 13-15 centimeters; acre put in 6,000-0.8 million is better, suitable for the cultivation of large-size winter pieces.
Third, feeding and management
1. Feed feeding: Keeping a certain amount of fat during the cultivation of the fingerlings, especially the abundant natural zooplankton in the early stage is very important. The next day, the powdered feedstuff can be put in the pond, such as fishmeal mix flour, and the conventional fish seed crushed material (protein content 30%~35%) can also be used. The amount of daily input increases as the growth period increases, generally from 0.8-1 kg/mu (0.5-0.8 kg of crushed material plus 0.2-0.4 kg of fish meal) → 1.2-1.5 kg/mu (1-1.2 kg of crushed material Add 0.5-0.8 kg of fish meal) → 1.8-2.5 kg / acre (1.2-1.8 kg of crushed material plus 0.8-1.2 kg of fish meal), the number of daily investment is not less than two times, the amount of feeding should be based on weather and fish The growth of sampling conditions for the corresponding increase or decrease.
2. Regulation of water quality: The depth of water at the pond is 1.2 meters, and new water is gradually added to 1.8 meters according to the rising water temperature. High-temperature season transparency is 0.3 meters or more, water quality requires fertility rate, daily aerators are activated to maintain high dissolved oxygen, and if necessary, uninterrupted circulation of micro-flowing water is used to improve the water quality of aquaculture waters. In late September, water quality is considered too low according to water quality conditions. When the quantity of natural zooplankton is insufficient, proper fertilizer should be used.
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