Dr. Yang: Hello! I have contracted dozens of acres of fish ponds in the suburbs of my hometown of Yueyang City in Hunan Province. I plan to develop some special aquaculture, but I do not know what to do. Can you introduce some aquaculture species and technologies that are suitable for fish pond culture and have high economic benefits? Thank you! Reader: Liu Wenjing Wenjing Liu reader: Hello! According to the characteristics of the area where your hometown is located, it is recommended that you culture blackbirds. Umberice is also known as fish, black mullet, and black fish. It is a precious freshwater fish with high nutritional value and is easy to raise. It can raise 1,500-2,000 kilograms of water on one acre of land, while ordinary fish can raise 400-500 kilograms on one acre, and It grows rapidly and can be harvested in one year. Now it introduces its pond culture technology as follows: Pond construction. Aquaculture ponds should be provided with adequate water sources, neutral or slightly alkaline water, no pollution, convenient irrigation and drainage, water temperature below 30°C, and bottom soil in loam, with an area of ​​200-300 square meters, and the bottom of the pool should be the cement bottom. Good, if it is mud, you can leave mud 10 centimeters, not too thick. Breeding depth is generally about 1.5-2 meters. It is best to keep micro-flowing water all year round. The top of the pond is 50-60 cm high with a brick or net fence to prevent the blackbird from jumping and escaping. Planting 80-100 cm wide water-lilies on the water around the pond will not only provide a summer vacation but also prevent the blackbird from escaping the pond. Use 50-70 kg of quick lime per acre of water before stocking, or use 10-15ppm bleach to disinfect water. Fish feed. It is best to use locally produced fingerlings for breeding. Fish stocking time: Fish stocks from June to August were stocked every year, and stocks were stocked every other year in March-April. The second half of the year is best to be kept before wintering. Fish species should be soaked with 3%-5% saline for 10-15 minutes before stocking. When the depth of water is 1.7-1.8 meters, 9,000-10,000 tails of 10-14 centimetres in length and 6,000-8,000 tails of 16-20 centimetres in length are released per acre. The small farm pond 0.3 mu fish pond, can put 500 to 1500 tail Wuling seedlings, pay attention to choose a strong, lively, phosphorus complete high quality fry. All triangle heads, razor backs, cloudy eyes, and body surface injuries are all inferior seedlings. The same stocking pond stocking specifications should be the same, otherwise the growth difference is too large, and it is easy to occur the size of disability. Feeding of bait: The pond mainly raises black quail and feeds mainly on feed fish. It can also feed compound feed through domestication. Located in the Hudang area can make full use of the wild fish in the large water surface to feed the Umbilicus; in the concentrated fish pond area, a part of the ponds can be used to cultivate quail, oysters, white bream and squid as feed fish; Use the leftovers from livestock and poultry slaughterhouses to feed Ukrainian taro. The daily feed amount of fresh feed is 4-6% of the weight of the fish and it is fed twice a day, and it is adjusted appropriately according to the season, weather, water temperature, and the food and activities of the Chinese wolfberry. With compound feed, the feed protein content is required to be about 40%. Feeding artificial compound feed, midway can not be mixed with small fish and shrimp, otherwise the black quail will only eat small fish and shrimp to eat without artificial feed, resulting in feed wastage, water quality deterioration. The pool should be set up feed, adhere to the "four definite" feeding principle. It is fed twice a day, once in the afternoon and once in the afternoon. Diagnostic Devices,Diagnostic Medical Devices,Medical Routine Diagnostic Tools,Medical In Vitro Diagnostic Tools Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com