Begonia pond culture technology

Begonia pond culture technology

Jellyfish is a large jellyfish, high protein, low fat, and has a high economic value. Artificial breeding of sea otters flourished. In 2003, the Dongying District Marine and Fisheries Bureau used newly developed ponds for sea bream breeding trials and achieved success. The test is summarized as follows:
I. Condition of aquaculture pond
1. Aquaculture Water is a natural seawater that is free of pollution and rich in food.
2. Haitangchi aquaculture pond is a newly developed pond in the winter of 2002, with a total area of ​​200 mu, a pond depth of 2.5m to 3.0m, and aquaculture water depth of 2.0m to 2.5m. The bottom of the soft mud is relatively steep and the pond slope is steep. There are entrance and exit gates.
Second, pre-release preparations
1. Disinfection Use bleaching powder 30ppm to 50ppm for Quanchiposa.
2. After water-injection ponds are sterilized, 40-60 mesh seine nets are installed at the inlet and outlet for water injection.
Third, seed stocking
1. Sources of seedlings are purchased at nursery sites around the farming area.
2. Seedling-laying conditions The seedlings were released on the evening of June 12 with clear weather and no wind. The pond water salinity in the rearing pond was 25 ‰ and the water temperature was 18 CC.
3. The seedlings were stocked with 190,000 sea larvae with an umbrella diameter of 0.7-1.0 cm, and the average stocking density was 950 fish per mu.
IV. Breeding management
1. Water Quality Management Sea Bream farming differs from other sea-breeding cultures in that it does not require artificial feeding. Pond water or fertilization is performed prior to planting to maintain proper dietary biomass in the water. The water should be stabilized for 5 days after pond water is applied. After the young quail is gradually adapting to the environment, water is added. Every time the water is added and the water is changed, the water is kept within 15% of the total water body, and the water change is gradually increased as the individual grows. The principle is to change less, change frequently. When the amount of water is increased to the maximum, it is necessary to change the amount of water in order to maintain a good growth environment for the young. When the weather is not good, the pool water should be replaced or not changed, so as to avoid environmental changes and affect the growth of sea otters. Before each water change, the temperature and salinity of the new water to be exchanged shall be measured. The temperature difference shall not exceed 3°C. The difference in salinity shall not exceed 10 ‰. The water temperature of the pool water shall preferably be maintained above 18°C. The salinity is best maintained at Between 20 ‰ and 30 。.
2. Day-to-day management First, observe the changes in the environment, the color of the water, and the activities of the jellyfish one by one in the morning and at night. Observe the problems and take timely measures. Second, strengthen the detection work, start from the pond, and measure the salinity of the water daily. , pH, etc., measure the minimum and maximum water temperature of the pool water at dawn and in the afternoon, and make records; third, observe the growth of jellyfish at any time, monitor the changes in water quality and the amount of plankton in the water, and do a good job in the determination of relevant data to ensure smooth production. get on.
V. Breeding results Since June 12th to July 23rd, they were harvested for a total of 40 days and harvested 73,500kg of sea otters. The average size of sea otters reached 3kg, and the largest individual reached 5kg. The survival rate of breeding reached 20%, and the average yield was 367.5kg. The average profit is 2,100 yuan/mu, with significant benefits.
Sixth, summary and discussion
1. Sea Bream farming has the advantages of low cost, wide market prospects, good market, and high economic benefits, which is of great significance for adjusting the structure of aquaculture ponds.
2. Water quality management is the key to the cultivation of sea lice. Begonia grows very fast and requires a lot of animal feed, and we can't feed it on a large scale, so changing the amount of water determines the amount of food organisms. In the breeding process, we must constantly change the water in order to maintain the stability of water quality and water environment, and create a good environment for the growth of seabream, thereby increasing the survival rate of sea lice, promoting the rapid growth of sea otters, and achieving better economic benefits.
3. During the cultivation process of sea lice, sea lice will release toxins from the body after being stimulated by the outside world, affecting their normal growth, so we must pay attention to avoiding the startle of the sea otters caused by the external environment.

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