Into the management of autumn fish ponds
“After entering the fall, fish diseases are prone to occur, and management of fish ponds is not to be sloppy!†On August 11th, the engineer of the Fisheries and Aquaculture Bureau of Nanjiang County and aquaculture expert Xian Wenquan came to Boluo Village, Guanlu Township and gave them a fish. The fishing villagers in Tang said. Autumn is both a time when fish grow faster and fatten up, and it is also a high season for fish diseases and flooded ponds. Fish pond management should be detailed.
Careful management of water quality
Autumn ponds should be carefully managed to ensure the safe growth of fish. Under normal circumstances, the basic requirement for fish pond water quality is to keep the water body “fat, live, tender and coolâ€.
There are three main measures -
Add fresh water. After the fall, deepen the water level to more than 2 meters. Add fresh water once every 10 days. Time should be 12:00 am to 2:00 p.m. or 3:00 p.m. to 5:00 p.m. Change the water in the evening to avoid causing fish to float and cause unnecessary losses.
Increase dissolved oxygen. The main measure to increase dissolved oxygen in fish ponds is to use microporous oxygen and sprinkle oxygen enhancer. The correct method of using microporous oxygen is to open at noon on sunny days and not to open in the evening; open in the early morning on cloudy days and open in the daytime; open in advance when there are signs of floating head; and open in the middle of the night in cloudy rain. The most suitable boot time and boot time, should be based on the weather, fish dynamics and aerobic equipment load and other flexibility.
Use quicklime to adjust the Ph value.
The Ph value of aquaculture water is one of the important reasons that affect the feeding and growth of farmed fish. Maintaining the stability of Ph value is an important means to ensure stable production and high yield. Sprinkle once a month - 2 times lime, the amount of 15 kg per mu -20 kg.
Increase the amount of feeding
Autumn is the season with the highest amount of fish ponds, and the total amount of feedings accounts for more than 40% of the total amount of the year. In September, the general temperature gradually changed from hot to cool, and the water temperature was just right for fish growth. In addition, the green feed was sufficient, and the feeding amount should be increased (It is worth noting that the herring and grass carp are susceptible to disease before and after the white dew. Appropriate control should be given to the amount of feed). . In October, the high season of fish disease has passed, and a large amount of feed can be fed. At this time, the green feed gradually decreases, and the proportion of feed formulated feed should be increased appropriately for herbivorous fish. In November, the water temperature gradually decreased and the food intake of fish decreased, gradually reducing the amount of feed.
Feed feeding to achieve "four set" -
First, the quality should be fed to fresh feed, not fed rotten degenerate feed. The second is positioning. It is necessary to build a food platform and set up a food court to create conditions for the centralized food intake and disinfection of fish farms in order to improve feed utilization. The third is regular feeding twice a day, 8:00-9:00 in the morning and 4:00-5:00 in the afternoon. The fourth is quantitative, feeding amount should be based on the weather, water quality, fish feeding activities and the type of feed to be controlled. Feeding compound feed is 4% to 6% of the weight of eating fish, feeding green feed for herbivorous food 30% - 40% of the weight of the fish, mixed fish ponds should first cast green feed, after voted feed.
Alternating season fish disease
In the alternate season of hot and cold weather, there are more fish diseases. We should earnestly implement "prevention as the main and prevention as the emphasis." In addition to the good quality of feed, fish should be regularly splashed and administered for prevention. The water body is generally sterilized and sterilized once a month. For example, quicklime and bleaching powder are used alternately to kill pathogens and parasites in the water. At the same time, it is possible to feed 1-2 kg of bacon made from garlic on a monthly basis; or 250 g of allicin for a course of treatment with baits; or to mix 5 “triple yellow†(rhubarb, yellow) in the feed.岑, Phellodendron, proportion 2: 5: 3 to fine powder); or use 2 ‰ ‰ 4 ‰ 鳃 鳃 鳃 spirit, each feeding 2-3 days, fed once a day.
Liming strengthens the patrol
Strengthen the patrol pond. Adhere to the morning, the middle, and evening patrols three times a day to observe the feeding conditions of pond fish, the changes in water quality, whether there are floating heads, and whether there is a disease. At dawn, it is the time when fish ponds are most deprived of oxygen, which can easily lead to floating heads of fish. In severe cases, they can cause dead fish in “pan pondsâ€. Therefore, special attention must be paid to observation. In the event of an oxygen-depleted floating head, fish should be filled with new water, oxygen-enriched equipment, or high-efficiency oxygenation agents. It was found that the fish in the fish ponds were eating and eating abnormally. They were left undisturbed or floating in shallow water and were not moving or swimming aggressively. They were struggling uneasy. This was a response to fish diseases and should be promptly treated.
Keep fish ponds clean and sanitary. Grass carp eats the rest of the grass roots, stems, rods and other remnants, perishable in the water deterioration, easy to induce fish disease, to be promptly removed. Deterioration and rotting bait residue is eaten by the fish and can cause intestinal inflammation. Therefore, the bait residue around the food field should be promptly removed, and the aquaculture production equipment should be frequently disinfected. The diseased fish and dead fish in the pond should be removed in time and buried in the soil to prevent the spread of pathogens. Prevent toxic substances from contaminating fish pond water.
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