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First, preparation before stocking: 1. Disinfection of the fish pond. Before the fry is released, the pond has to be sterilized. There are two methods. One is the dry pond method, and the dry or drained pool water is used. After the sun exposure, the golden pool evenly disperses the quicklime. The amount of 75g per square meter area is used to inject new ones on the first day. Water, put for 4-5 days and then change the new water, and then put 2-3 days after the fish can be placed; Second, with the water method, per cubic meter of water with 220g of lime, the calcined pulp, the whole pool evenly spilled, waiting lime After the toxicity disappeared, the water quality was started. There are two ways to check the toxicity of quicklime: First, check the ph value of the pool water. If the ph value drops below 7, it means that the toxicity of quicklime has disappeared; second, there is no water in the pool water. If there is water, the toxicity is already disappear. 2. Fertilizer water quality. After the disinfection of the fish pond is completed, the fertilization water quality is started about one week before the fish fry is released. The depth of water injection is preferably 50-60 cm. Then 250-300 kg of livestock manure water is added per mu to make the fish rich in natural food. 3. Pull the net to check. In the first day before the fish pond or before the temporary release of the summer fish net to pull 1 to 2 empty nets to check and clear the pond may also exist in a small number of wild fish, maggots, frog eggs and aquatic insects and other predators.
The second is the stocking of fry: 1. Selection and disinfection of fry. Stocking fry should be harmless, disease-free, and healthy. Fish species should be more than 3 cm in size and be as consistent as possible to avoid killing each other. In the daily management work, disease prevention work is particularly important, and fish disinfection must be done when the fry is released. The method is to dilute 1 kg of salt with 30 kg of water and soak the fry in salt water for 5 minutes before placing the seedlings. 2. The fry's stocking time. Fry stocking should be selected during the peak period of rotifer breeding. 5 to 7 days after fertilization in the pond is the best time for fry stocking. Restocking time is appropriate in sunny days, generally when the water temperature is 20 °C ~ 25 °C. 3. The stocking density of fry. Generally, the stocking density of mu is 10 to 200,000. The stocking density of earthworms and earthworms can be larger, and the stocking density of grass carp can be smaller. In the same mouth, the fry of the same batch of breeding should be enough for one time. 4. The fry stocking should be single-stocked and try to avoid polyculture. 5. When stocking, you should choose to put the seedlings in the ventilated place of the pond. The operation should be careful and the action should be brisk.
1. Clear pond disinfection. This is an effective method to kill wild fish, predators, parasites and improve the survival rate of fry. Commonly used disinfection drugs for clear ponds mainly include quicklime, bleaching powder and other drugs. Qingtang disinfection work is generally selected in the fry The first 7 to 10 days of sunny days at noon.
2. Detect drug residual toxicity. Check the toxicity of the drug completely before the fish in the pond. The main methods are as follows: 1. Put dozens of fry into the cage in the pond to try raising. If the fry can live for half a day to one day, it shows that the toxicity of the medicine has disappeared; 2. The pool of water is used to clear the pond. PH value dropped to 9 or less, then the toxicity of quicklime has disappeared; 3. There is no water in the observation pool, if any, it means that the drug toxicity has disappeared.
3. Under the pond. When the fry is able to swim normally 4 to 5 days after hatching, it should be promptly passed through the pond. Under the pond too early, the swimming ability of the fry is poor, and it is easy to sink into the pond; if the pond is too late, the survival rate of the fry is poor.
4. It is advisable to raise one alone. It is more appropriate to stock one species in the same flower pond, and it must be the fish hatched in the same batch. It cannot be polyculture, and it cannot be nested in large and small sizes.
5. Putting seedlings on sunny days. In sunny days, pond water temperature is higher, dissolved oxygen is higher, and fry grows stronger. At this time, it is easier to adapt to the environment. In cloudy and rainy days, the temperature of pond water is low, and the dissolved oxygen is also low. The fish will concentrate in shallow water and consume physical energy, affecting food intake. Fry died.
6. Manure underwater pond. This is a key measure to increase the survival rate of fry. The density of rotifers in ponds should reach 5,000 to 10,000 per litre when they are in the pond, so that there are enough peculiar natural foods behind the fish ponds. Therefore, the first five days before the fish ponds should be applied to the base fertilizer, generally 200-500 kilograms of fertilizer applied per acre, new ponds should also be appropriate addition of chemical fertilizer 5 to 10 kilograms.
7. Check the food organisms. Most plentiful zooplankton such as rotifers and nauplii are mostly milky white and suitable for fish ponds. If there are many large zooplanktons such as copepods, horned horns, and red worms, they should be splashed with crystals. Aqueous solution. It is also possible to eat large-scale zooplankton in a calyx of about 200 to 300 ca. However, we must pay attention to two points: First, the calyx must be healthy and disease-free; second, all the calyces must be caught before the fry.
8. Pull the net to eliminate harm. Before the fry are stocked, they must use a dense net to pull the net 1 or 2 times to remove wild fish, frog eggs, and aquatic insects.
9. Note the temperature difference. The temperature difference between the fish and the lower pond must not exceed 3°C. Otherwise, the temperature of the fish should be gradually adjusted to make it consistent and then the fry can be lowered.
10. Carefully stocking. When the pond is under the pond, place the container of the fry in a sheltered area and let the fry swim slowly (can't dump). When windy, fish should be placed in the upwind position. Otherwise, the fry can be easily blown by the wind to the edge of the pool.
Water
is made of water and pepper, red in color, add garlic, ginger, sugar,
salt, you can long-term preservation, the taste is more delicious.
Different regions have different local flavor pepper sauce. Generally
made chili sauce at home, the pepper placed in the pot, saute (without
oil), crushed into powder (cut with a knife can also be the more broken
the better, end of pepper (also with non-oil pot cooked, scented, And
then into the end), garlic (according to the number of chili and
personal preferences) .All the above seasoning, garlic and vinegar and
finally put the pan into the oil (the amount of oil according to the
number of peppers, no peppers can be.), Direct Sesame
oil is also OK, after heating a good point, the oil let cool, blending
into the pepper. And then stirring. Add garlic and vinegar, tune into a
glass bottle with the food, salad, noodles, cooking The ingredients.
How do the fry grow to survive?
To improve the survival rate of fry stocking, we must do the following two tasks: