The use of winter free paddy fields to raise fish can not only increase the utilization rate of rice fields, but also increase farmers' economic income, reduce the diseases and pests of seedlings, and reduce the expenditure of pesticides and fertilizers in the coming year. In addition, when seedlings are planted in spring, no-tillage can be done and labor can be saved, and a double harvest of rice and fish can be obtained. Through paddy field project reconstruction, scientific stocking, and management, it can produce 150-200 kilograms of commercial fish per mu, and the net profit is 800 yuan per mu. The ratio of input to output is 1:2, and good economic and ecological benefits can be achieved. Now we will introduce the techniques of fish farming in winter. First, the choice of rice fields. Select paddy fields with sufficient water sources, fresh water, no pollution, and convenient drainage and irrigation. Second, rice field project construction. After the rice is harvested, the rice fields are returned for use as fish feed and fertilizer. Raise Tajiri Rama up to 1 metre around the field of Harada, make a 50-cm wide base, a 30-cm wide top, and a plastic pipe with a diameter of 15 cm buried in the water inlet, set a flood outlet at the outlet, and use mesh openings for the flood discharge. The stencil is smaller than the fish and used as a barrage. Third, fish stocking. Before stocking, use a small amount of quicklime or bleaching agent to remove the wild fish in the field, and then irrigate the water to 50cm. When the water is irrigated, filter the net with a mesh of 40 mesh to the plastic pipe at the inlet to prevent the wild fish from entering the field. . Fish species were soaked with 2% to 3% of salt water for 10 minutes before stocking. The stocking amount was 300 fish per mu, of which 90 were grass carp weight, 100 fish weight, 50 fish carp 50 grams, 180 carp fish, 10 centimeters in length, and fish. The physique is robust, the scales are complete, and there is no disease or injury. Fourth, the cultivation of ryegrass. The ryegrass are planted on the open lands of the fields and on the field side. The area of ​​the grass is 10% to 15% of the area of ​​the rice fields, and the production of the grass is 5 tons for the consumption of grass carp. During the first 3 days of harvesting ryegrass, fertilizing ryegrass can shorten the time for two harvests and increase grass production. Fifth, feeding and management. In the first week of stocking, the feed is generally not fed. The fish can eat plankton, organic debris and rice lost in the field. Grass carp can eat rice leaves. One week later, corn flour and wheat bran were fed at a rate of 5% of the body of the fish every day, and 40% of the body weight of the grass carp was fed to the cabbage leaves. After ryegrass can be harvested in November, grass carps are mainly used for ryegrass, and from November to December, 2% of pellets are fed daily. From January to February, the water temperature is low, and the food intake of fish is small, and it is appropriately fed according to the weather conditions. From March to April, the water temperature gradually increased, and the food intake of fish increased gradually. Every day, 5% pellet feed and green feed were fed to the next morning. Sixth, daily management. Just put the fish when the irrigation 30 cm, so that rice roots can emerge and grow for grass carp use. According to the growth of the regenerated rice and the eating and feeding of fish, the water level is gradually deepened. In November, the water level went deeper than 60 cm. Every morning and evening, we should go to Tanabe to check the fish's activity and avoid the death of fish due to lack of oxygen and timely detection of fish diseases. Seven, fish disease prevention and control. During the farming of winter fish paddy, the cold time is longer and the disease is less. In the beginning of November, bleaching and chlorine dioxide and other disinfectants were used for the prevention of disinfection, and regularly mixed in the pellet feed, grass or soaked such as garlic, rhubarb, oxytetracycline and other drugs to achieve the purpose of comprehensive prevention.
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