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1 Burrowing bullfrogs have the habit of digging holes. The soil around the frog pool can be loosened, and several caves with a diameter of 15cm and a depth of 1m can be dug in the leeward sunny surface water level to allow the bullfrog to hibernate into the hole.
2 irrigation deep water to maintain the water depth in the frog pool 1 ~ 1.2m, silt thickness 6 ~ 9cm, in order to facilitate the bullfrog crouching in silt overwintering.
3 In the Gaicao Pond, aquatic plants such as water hyacinth and water peanuts are put into the pond, or straw is laid to a depth of 30cm, covering about two-thirds of the surface of the water, which can effectively increase the temperature and prevent freezing.
4 Cover grass curtains to build a wall on the northern side of the Frog Pond, and build a north-south-low triangular wall on both sides of the east and west. 30 to 40cm away from the surface of the water with bamboo sticks, covering the grass curtain, close to the edge of the pool and keep the water temperature around 10 °C.
5. The stack of grass piles a haystack at the leeward side of the frog pond or spreads the grass on the 50cm soil layer and covers the film to keep it moist. When the temperature drops, the bullfrog will drill into the haystack and hibernate.
6 Cover the film above the surface of the frog pool 30cm away from the surface of the water with an arch or "human" shaped scaffold, covered with plastic film, and then cover a layer of mesh to prevent the film from being blown by the wind, keeping the water temperature not lower than 10°C.
Bullfrog safe wintering measures
From late November to early March, the calf's hibernation period lasts for about 100 days. Taking some measures to prevent cold and heat insulation can ensure that bullfrogs safely pass winter.
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