(I) Autumn and winter techniques of grass carp and herring broodstock 1. Feeding: The water temperature is suitable in autumn, which is the season when grass carp and herring eat more food. Throughout the autumn, the feeding principle of “concentrate-based, refined-coarse†should be adopted. Grass carp broodstock should be fed daily dry weight concentrates such as wheat and soybean cake. After 2 days, feed green feed 1 time, and the amount of each feed was about 20% of the broiler weight. Herring broodstock is mainly fed with snails, clams, and oysters, supplemented with bean cakes.
2. Adjust water quality: autumn grass carp and herring eat a large amount of food, frequent activities, water quality is easy to aging, in the rainy and humid weather can cause anoxic floating head. Therefore, always add fresh water to the pond to keep it fresh. In conditional ponds, aerators should be installed, and oxygen should be turned on when necessary to increase dissolved oxygen in the water, improve water quality, and facilitate the development of gonads in broodstock.
3. Prevention and treatment: autumn grass carp, herring are prone to enteritis, gills, red skin and other diseases. First of all, we must do a good job of prevention work. Disinfect the body of water with quicklime, strong chlorine, etc.; second is not to feed moldy feed, and feed the green material after disinfection with bleaching powder. If broodstock is found to be ill, it should be diagnosed and treated symptomatically.
(II) Qiu Pei technology of broodstock and broodstock 1. Fertilization: Organic fertilizer should be applied regularly in the fall. In the main pond for raising fish, the ratio of organic fertilizer is: 70% of human feces and 30% of pig cow dung; the ponds of the main breeding ponds, the ratio of organic fertilizers is: 70% of pig cow dung and 30% of human dung. The number and number of shots should be based on the pond's fatness, weather changes, broodstock activity, and more. The general principle is to keep the water dark brown with a transparency of about 20 cm. When necessary, add powdered feed for broodstock to accumulate fat and ensure normal development of gonads.
2. Adjust water quality: In the autumn, new water should be injected into the pond frequently. In order to maintain the fertility and tenderness of the water body, the pond water must be filled in autumn. Conditional ponds should be equipped with aerators for oxygenation to prevent broodstock flooding due to lack of oxygen.
3. Fish disease epidemic prevention: The crickets of crickets and crickets are prone to parasitic diseases such as anchored head lice and fish gills in the fall. Conventional insecticides and other drugs can be used to prevent parasitic diseases.
(Dalong Township Fisheries Station, Dafeng City, Jiangsu Province, Yang Baoguo, Zip Code: 224125)
2. Adjust water quality: autumn grass carp and herring eat a large amount of food, frequent activities, water quality is easy to aging, in the rainy and humid weather can cause anoxic floating head. Therefore, always add fresh water to the pond to keep it fresh. In conditional ponds, aerators should be installed, and oxygen should be turned on when necessary to increase dissolved oxygen in the water, improve water quality, and facilitate the development of gonads in broodstock.
3. Prevention and treatment: autumn grass carp, herring are prone to enteritis, gills, red skin and other diseases. First of all, we must do a good job of prevention work. Disinfect the body of water with quicklime, strong chlorine, etc.; second is not to feed moldy feed, and feed the green material after disinfection with bleaching powder. If broodstock is found to be ill, it should be diagnosed and treated symptomatically.
(II) Qiu Pei technology of broodstock and broodstock 1. Fertilization: Organic fertilizer should be applied regularly in the fall. In the main pond for raising fish, the ratio of organic fertilizer is: 70% of human feces and 30% of pig cow dung; the ponds of the main breeding ponds, the ratio of organic fertilizers is: 70% of pig cow dung and 30% of human dung. The number and number of shots should be based on the pond's fatness, weather changes, broodstock activity, and more. The general principle is to keep the water dark brown with a transparency of about 20 cm. When necessary, add powdered feed for broodstock to accumulate fat and ensure normal development of gonads.
2. Adjust water quality: In the autumn, new water should be injected into the pond frequently. In order to maintain the fertility and tenderness of the water body, the pond water must be filled in autumn. Conditional ponds should be equipped with aerators for oxygenation to prevent broodstock flooding due to lack of oxygen.
3. Fish disease epidemic prevention: The crickets of crickets and crickets are prone to parasitic diseases such as anchored head lice and fish gills in the fall. Conventional insecticides and other drugs can be used to prevent parasitic diseases.
(Dalong Township Fisheries Station, Dafeng City, Jiangsu Province, Yang Baoguo, Zip Code: 224125)