The application of fertilizing and fertilizing is the need to cultivate water quality, cultivate natural food, and ensure the feeding of pond fish. All types of fish ponds, especially those that rely mainly on flowering whitefish, should be properly chased. Due to the hot summer weather, high water temperature, rapid decomposition of organic matter, reproduction of plankton, fish consumption of oxygen, and water quality deterioration, so the amount of fertilizer should not be too much, adhere to the principle of a small amount of ground, and according to the weather, color and cultured fish The variety to determine the amount of fertilizer. If the weather is fine, it can be applied in an appropriate manner. Apply little or no fertilizer on rainy or sweltering days. The water is light, light yellow or light green, and the transparency is high. To use it more, the water is brown-green, oil-green or red-brown, and the transparency is 30 cm. Around, you can use less or no fertilization; fish ponds that use oysters, clams, and squid should be used in multiple applications, and fish ponds that use mainly cyanotic fish or grass carp should be used sparingly. Fertilizer to avoid the food market.
The feeding amount of feeds fed from July to September should account for 60% of the total feeding amount of the whole year, and it should be fed 3 times a day in the early, middle and late nights. The amount of morning and evening is bigger and the amount is smaller at noon. The combination of early green material, medium fine material, and late green material is required, and the amount of feed to be fed should be fresh and appropriate. Feeding on a fixed food field, and encountering hot days, rainy days or fish floating heads, should be fed little or no.
Strengthen management to inspect the ponds every morning and evening, observe the dynamics of water color and fish, and master the specific changes in the pond. If abnormal, take appropriate measures in time to prevent fish disease. Frequently remove leftovers and dirt, remove pool side weeds, so as not to pollute water quality, affect the amount of dissolved oxygen in water.
To improve water quality, regular new water should be added to increase dissolved oxygen in water. Generally, water is added once every 2 to 3 days, and water is added 5 to 10 cm deep each time to prevent fish floating. Water injection time: In normal weather conditions, water injection into the fish pond at night can increase the amount of dissolved oxygen in the pool water, improve water quality, and avoid fish's hypoxia floating head. Water flow plate: New water is added to the fish pond. If the water stream falls directly from a height and rushes into the bottom of the pool, the feed residue, excrement, sludge, etc. deposited on the bottom of the pond will be deposited due to the large amount of water flow and water. Overturned. In order to prevent this from happening, a fixed wooden board can be placed under the water in the tribe to make the injected new water fall on the board and splashes of water to increase the amount of dissolved oxygen injected into the new water.
Increasing dissolved oxygen When it is predicted that fish floating head may occur, apply water pump or add aerator to increase oxygen, stop fertilizing and control the amount of feeding, and shorten the time for eating. When fish floating head occurs, if there is no oxygenating device or there is no time to increase oxygen, yellow muddy water can be added to the pool to add salt water, that is, 10 kg of yellow mud per acre of water surface, add water to make a paste, and add 10 kg of salt solution in water Sprinkle the entire pool after mixing. The start time of the aerator: Sunny at noon boot, cloudy early morning boot, rainy night boot, do not boot in the evening.
Prevention of fish diseases Every 15 days or so, 250-300 grams of bleaching powder and 125 grams of ferrous sulfate are used on the edge of the fish pond and on the food table to sprinkle water 1 time to prevent bacterial skin disease and gill disease; ~ 3 times, according to 10 kilograms of fish with 500 grams of garlic, chopped and chopped feed, each feeding 3 to 5 days, can prevent intestinal inflammation and other diseases; every 20 to 30 days, with 15 to 20 kg of lime per acre of water ,Spray after being dissolved in water, can improve the water quality.
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