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One, fertilization and feeding
The mild autumn climate is a good time for fish fattening. At this time, a lot of fertilization and feeding are needed to ensure the feeding needs of different food fish. The amount of feed to feed is determined in principle according to the feeding conditions of the fish, that is, how much fish feed on how much to feed, to ensure the amount of sufficient, while insisting on timing, fixed-point, qualitative, quantitative. The ponds that mainly support herbivorous fish should be fed with green fodder first and then fed with compound feed; while the ponds that mainly raise trout should be treated with inorganic fertilizers, so that they can be applied sparingly and frequently, usually every 5 to 8 months. Tian Shi once, each time a mu of 2 kg of urea, phosphate fertilizer 3 kg, require fertilization after the water was yellow-green or oil green. After entering the Winter, the temperature of the water is relatively cold. However, when the water temperature is above 7°C, appropriate feeding should be conducted so that the fish do not fall out for safe wintering.
Second, water injection oxygen
There are more fertilizations in autumn, fish eaten well, and water quality changes rapidly. Careful management of water quality should be conducted to ensure the safe growth of fish. Under normal circumstances, add new water once a week, add 10 to 20 centimeters each time, and keep the water depth at 1.5 meters or more; fish ponds with higher density should open the aerator for 1 to 2 hours every day at noon. In winter, the water temperature is low and the dissolved oxygen is high. The new water can be properly reduced to keep the water, fertilizer, live and cool, and give the fish a suitable environment.
Third, strengthen the patrol pond
Continue to adhere to the patrol pond. When the weather is abnormal, more than 3 times a day will be spent on a patrol. If fish floating heads are found, measures should be taken immediately to remove the residual baits and foreign bodies on the surface in a timely manner so as to keep the food table clean and hygienic. The situation of dead fish was identified and the necessary measures were taken. Pay attention to prevent the harm of predatory creatures and artificially destroy fish.
Fourth, catch the listing
In the fall, it should be based on the growth of the fish to catch the market in order to reduce the density of fish on the pond and promote fish growth.
Fifth, fish disease prevention
After the fall, although the incidence of fish is reduced, due to increased feeding and fertilization, the water quality changes rapidly, and fish diseases still occur. Therefore, fish disease pre-treatment work should also be done. In addition to the quality of good feed and good environmental sanitation work in ponds, fish poisons and baits should be regularly given for prevention and treatment. In general, throw a strong chlorine or net chlorine once a month, each time the pond water was 0.3 mg / l concentration; or quicklime sprinkled with water, each with 15 kg of lime per acre. At the same time, Dietridge baits or sulfa drug baits are fed once a month for 1 to 2 days each time and once a day.
Fish pond autumn management focus
After entering the Autumn, the weather turns cold, the water temperature gradually decreases, and the growth rate of fish gradually slows down. However, at this time, the number of pathogenic bacteria in the water body decreases, and the incidence of fish is small. Therefore, autumn is the golden season for fish growth and fattening. At this point, we must grasp the following management priorities: