Feed preparation and fertilization The main feed for grass carp should be based on compound feed, supplemented by green feed. Formulated feed consists of fish meal, bean cake, wheat bran, sub-powder, and grass meal, together with compound additives of mineral salts, multi-dimensional and amino acids, of which crude protein accounts for 20%, crude fat accounts for 4%, and cellulose accounts for 8% - 10%. Green fodder for the feeding of dry grass, aquatic grass and so on. Grass should be fresh, easy to digest, grass carp eat hard to get sick. Grass carp ponds generally do not use basal fertilizer, but during the early spring, when the water temperature is low, and the quantity of phytoplankton is small, topdressing should be carried out. Afterwards, depending on the transparency of the pool water, the fertilizer can be applied as appropriate. Aquaculture management 1. Feeding: Feeding is the main job in aquaculture management, including the feeding of daily feed and baits. Feeding and feeding must strictly adhere to the "four principles" principle, that is, qualitative, timing, quantitative, fixed-point. 1 Feed Feeding: Feeding amount is based on the weather, water temperature, fish growth, and past years. It is based on the principle of feeding 70%-80% of the daily feeding amount. From mid-March to May, 2-4 times a day, June to August mid-day, 3 times a day, and from mid-August to October, 4 times a day. From June onwards, feed green feed once a day, but not too much, to prevent overgrowth, fish disease. 2 bait feeding: The use of norfloxacin, multidimensional, Baogan Ling as the drug-based bait for feeding. The method is as follows: The bait is mixed into the pellet feed, and the added amount is 60%, once a day, 6 days as a cycle, and feeding one cycle per month to prevent fish disease. 2, water quality management: 1 regular spill lime: generally half a meter per acre water depth of 20 meters per kilometer water, or bleaching powder 1ppm Quanchiposa. 2 Regularly add new water: In order to improve the water quality of the pond, the pool water should be in a clear, fresh, and cool state. The pond should be replaced with new water regularly. Normally, a new water should be filled for 7-10 days, about 30 centimeters each time. Changing the water should be done on a sunny day and be completed before 5pm. 3 Open the aerator every day: From mid-May to September, stick to a sunny day at noon for 2-3 hours, transfer a large amount of saturated oxygen from the upper layer of water to the lower layer, supplement the dissolved oxygen in the lower layer of water, and promote the convection of the upper and lower layers of the water to break the layers of the warmer layers. Maintain the water temperature balance. Cloudy boot time is mostly chosen around 6-7 am; rainy days are around 3 am; rainy days should be around midnight (not evening boot), boot time longer; if the weather is hot, you can boot every day to keep the pond water quality Fertilizer, live, cool, accelerate fish growth, achieve stable production, high yield. (4) Intensive patrol ponds: It is necessary to adhere to the three patrol ponds in the early, middle and late nights. In case of abnormal weather, the number of patrol ponds must be increased. The patrol pond needs to be legged, hands-on, and eye-deep. Leg Work: When visiting the pond, you should go down to the water or in the water and carefully observe the water quality and surrounding conditions. Handwork: Remove the leftover grass, dead fish, and floaters. Eyesight: Look at the sky, view the birds, view the water and the fish. Through the patrol pond, we must keep abreast of the fish's activities and eating conditions and master the changes in water quality so that we can prevent disease and prevent disease and treat disease early. Fish disease prevention and control of grass carp are highly susceptible to diseases, the main diseases are enteritis, red skin, gills, and grass carp hemorrhagic disease. Once sick, it is sometimes difficult to control. According to the actual situation in the region, several control methods are introduced. 1, quicklime or bleach clear pond disinfection. 2, using the aforementioned bait feeding method for comprehensive prevention and treatment of fish disease. 3, with 0.25-0.5ppm bromochloroic acid Quanchiposa, at the same time every 100 kilograms of fish with 10 grams of garlic per day made baits, or mixed feed, once every 6 days, can cure enteritis and rot. 4, with 1ppm dichlorine Quanchiposa, and then every 100 kg of fish with 1 g of norfloxacin fed bait, 2-6 days by half, 6 days a course of treatment, can prevent gills and bleeding. 5, with copper sulfate 0.7ppm + ferrous sulfate 0.5ppm + trichlorfon 0.5ppm mixed Quanchiposa, the next day again splash Povidone iodine or chlorine dioxide (used in accordance with the instructions), can prevent grass carp syndrome .
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