First, pay attention to top dressing
The temperature is higher at the beginning of autumn, and fertilization should adhere to a small number of principles. If it is a fertilizer pond, apply a small amount of fertilizer. Generally, 2.5 mu of urea and 5 kg of superphosphate are applied in order to make the pool water green or tea green suitable. If it is the Qingshui half-lime pond, the human feces of fermented livestock are mainly used. Mushi 400 to 500 kilograms, applied 7 to 10 days intervals. At the end of the fall, the temperature of the water drops and organic fertilizers should be the mainstay.
There is a large temperature difference between day and night in autumn, and fishes begin to accumulate energy to prepare for winter. At this time, on the one hand, it is necessary to ensure that sufficient green feed is fed, and the feed is fed once a day in the afternoon and in the afternoon, and it is advisable to feed each meal within 2 hours. On the other hand, it is necessary to increase the amount of concentrate feed, which can be mixed with bran, rice bran, peanut bran, and soy flour. Feeding once a day, the amount of the fed fish accounts for 2.5% to 3% of the total amount of fish. After October, the amount of fish fed is appropriately increased to ensure the nutritional requirements of the fish.
Second, pay attention to water quality
Generally should be poured every 7 to 10 days of new water, each changing the amount of water 20 to 30 centimeters; lime per acre 20 kg splashed on the surface of the water, spilled 1 to 2 times a month is appropriate. If it is a fertilizer pond or a fish pond that is mainly fed with concentrate feed and the pond of a supporting livestock farm, the water quality is easily eutrophic. It is better to use 50 to 60 square meters of water on the bamboo raft fence per acre pond to plant a water-laying lotus. And water peanuts, etc., to absorb excess ammonia nitrogen, to improve the regulation of water quality purposes. At the same time, water peanut leaves can also be fed grass carp.
Third, pay attention to prevent floating head
In the morning and evening, especially in the middle of the night, it is necessary to strengthen the patrol pond. When fish heads are found to have signs of floating heads, aerators should be activated immediately to increase oxygen, or new water should be injected into the pond. If there is no new water infusion, and no aerator oxygenation, then each acre with 5 kg of alum or 20 kilograms of salt water dissolved, or with oxygen, and should pay attention to clean water impurities and residual grass.
Autumn is prone to enteritis, gills, red skin and other diseases, prevention should be the main combination of prevention and treatment. The pond with 1 mu of water and 1 meter of water depth every half a month is splashed with bleaching powder and 1 kg of water. At the same time, it needs to be fed once with “Cyprevir†and “Fishikang†to prevent disease; if disease has already occurred, The water disinfectant should be applied continuously 2 times, and the medicine bait should be administered for 1 course (4 to 5 days).
Fourth, prepare for winter
Some pond fish need to be sub-species, sub-special pond culture winter. Fierce, flesh-eating fish do not grow too much in size. Clear ponds should be sterilized for overwintering ponds. During winter, ponds usually have water depths of 2 to 3 meters. If tropical and subtropical fishes are cultured, they should also take a frost shed, use sedges or woven film in the deepest position of the leeward pond, and leave the surface 20 centimeters to build a 80 to 100 square metre anti-moisture shed per acre. An degree of strict winter.
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