First, the water temperature overwintering Astragalus method When the temperature dropped to below 10 °C (Astragalus growth temperature of 15 °C ~ 30 °C), Astragalus rarely fed and hibernation into the hole. In order to ensure safe wintering of carp, the water level in the tank should be raised to 70-80 cm to ensure that the water temperature in the bottom of the pool is >0°C. If the surface of the pool is generally frozen, in order to prevent oxygen deprivation, the ice must be opened every day. At the same time, on the basis of the original, deepen the water level.
2. When the water temperature of the alfalfa dry pond is over 10 °C, drain the pool water, but ensure that the bottom of the pond is moist. In case of freezing cold, the surface of the pool should be covered with a layer of straw, wheat straw and other crop straws, and the thickness of the covering should be more than 30 cm.
Third, when the temperature of the indoor wintering process of the Astragalus membranaceus is <10°C, the carp raised in the pond is turned to winter. In a room with a pool or bucket of 1 kg of salmon and 2 kg of water, place the trout into the pond or bucket and change the water daily.
Fourth, the wintering of the yellow shed shed winter when the water temperature <12 °C, the plastic greenhouse or greenhouse can be used for winter. In the greenhouse, the water level of the pond should be equal to the aquaculture water level, and the temperature in the shed should be guaranteed at 2°C to 8°C. At the highest temperature at noon every day, the ventilation holes in the greenhouse are opened, the air in the greenhouse is fresh, and ventilation holes are installed at the top of the greenhouse.
Fifth, the yellow glutinous material overwintering method in the yellow buckwheat before winter, feed high fat content feed, such as cocoons, cockroaches, fly maggots, etc., to feed as much as possible.
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