Ujjain, commonly known as blackfish, is classified under the order of Oystercatcher, Oysteridae, and Oystercatcher. Ujjain is said to be “a treasure in fishâ€. Its meat is delicious and nutritious. It has the effect of a new, nourishing and nourishing nurse. In recent years, it has become one of the famous breeds of artificial breeding.
1 pond requirement
1.1 Conditions The pond is suitable for 667-1334m2 (1 mu - 2 mu), the water depth is about 150cm, the pond is higher than the water surface 40cm-50cm, the pond is surrounded with bamboo fences, nylon nets and other materials around the height of 50cm to prevent fish from jumping out of the pool outer.
1.2 Water quality The source water is sufficient, the water quality is fresh, the water-soluble oxygen in the pool is more than 5mg/L, the pH is 7-8, and the transparency is more than 30cm.
2 stocking
2.1 Pre-stocking 7 days to 10 days before stocking, use 75kg-100kg quicklime dry clear pond disinfection per acre, clear pond 4 days after water injection. At the same time, some aquatic plants or water lilies are planted around the pond. The area of ​​aquatic plants cannot exceed 1/2 of the pond area. In the pool, a food table made of reeds, bamboo curtains and other materials is set up, and the size is 3m2 to 4m2. It is fixed at a distance of about 2m from the shore and 50cm to 60cm below the water surface.
2.2 Fish selection Choose the fish species that have the same specifications, smooth surface, full muscles, no injury, no disease, lively, and fierce competition.
2.3 Stocking time and specifications There are two kinds of fish species for ponds cultivated with black oysters. One species is larger than 50 grams per fish. It should be stocked in the early winter. One is 60-200 tails per kilogram. The species of fish, which was bred from the early spring of the year and cultivated for about 2 months, should be stocked in ponds from June to July.
2.4 Stocking Density: 4,000 to 5000 fish stocks per 667m2 (1 mu).
3 feed feeding
3.1 Feed Selection: Use undisturbed ice and fresh fish.
3.2 Feeding time: feed once every day in the afternoon and afternoon. 8 a.m. to 9 p.m. and 4 p.m. to 5 p.m.
3.3 Feeding method: Cut the feed into pieces and feed it to the food table when the temperature is approximately the same as the water temperature of the pool water. The daily feeding amount is 3%-10% of the total weight of the fish body, which should be flexibly controlled according to the situation. Generally, the fish is not eaten on the food table.
4 daily management
4.1 patrol pond: Each morning and evening patrol ponds at least once, the main content is "look at the sky, see the water, see the fish", according to the weather, water quality, fish activities and develop and implement various feeding management.
4.2 Changing the water: The water in the pond of Wuyi is very easy to black and stink. The most effective solution is to change the water frequently. In the early days, the new water was changed every 10-15 days, and each time you exchanged 1/3 of the total amount of water in the whole pool, the high temperature season from July to September was usually a small change in 3 days, changing the water by 1/3. 7-10 days a big change, change the water 2/3 to improve water quality.
4.3 splash lime: depending on the water quality of the pool, occasionally splash lime water, the dosage of 667m2 (1 acre), 100cm water depth with lime 10kg-15kg, sprinkled Quanchiposa to adjust the water quality.
4.4 Do a good job of cleaning the water: Clean the food table every day, remove the leftover bait residue and dead fish in the water, and cut the overgrown weeds to prevent water pollution.
4.5 Preventing Escape from Fish: Wuyi has a strong ability to back up water and aisle habits, so doing a good job of anti-escape management is an important part of daily management. It is necessary to plug the loopholes in the pond and prevent the leakage of water from seeping in the ponds. Reinforce the height of the ponds and repair the fences, bamboo fences, and nylon nets to prevent them from escaping.
5 Fish Disease Prevention
5.1 Prevention: Keep the water fresh, feed fresh enough, and regularly use drugs to disinfect the body of water, food table, fishing gear, etc. The sick fish and dead fish picked up should be buried in time.
5.2 Treatment of common diseases In the high-density ponds, the main diseases are: fulminant haemorrhagic disease, bacterial gill disease and parasitic gill disease.
5.2.1 fulminant hemorrhage: The disease often occurs in the high-temperature season from July to August, with acute onset and death, often showing violent death. Diseased fish scales loose, pectoral fin base, abdominal congestion and inflammation, body wall sides of the vertical fish side of the line of bleeding stripes, some diseased fish have eyelids, muscle congestion phenomenon. The main reason is that the feed is fed with mildew and spoilage, and the residual baits in the food table are not removed, resulting in deterioration of water quality. This causes the water body to breed Gram-negative bacilli such as citrate Bacteria and invade the fish body. Treatment is performed using a combination of internal and external use. Oral administration is based on 1000 kg of feed fish blood 4 kg made of bait, fed for 5 days for a course of treatment; external use 100 poison eliminate, strong kill drugs and other drugs on the water, food table, fishing gear and other disinfection.
5.2.2 Gill disease: There are bacterial gill disease and parasitic gill disease. The main difference between the two symptoms is: the bacterial gill disease disease fish swim slowly in the water, not afraid of fright, sepals are gray, some local necrosis; parasitic fish gill disease movements were irritability, there is Travel phenomenon, sepals redness and swelling, and corrosion. The treatment of bacterial gill disease is the same as the outbreak hemorrhagic disease. For the treatment of parasitic gill rot, the whole pool of drugs such as crystal trichlorfon is used to kill parasites.
Every two days and then use hundreds of drugs and other disinfection drugs Quanchiposa, in order to prevent secondary infection of parasites bite the wound.
Chemical Raw Materials,Pvc Raw Material,Dicyandiamide 99.5%,Cleaning Chemicals Raw Material
Ningxia Darong Chemicals & Metallurgy Co., Ltd. , https://www.darong-cyanamide.com