How can Loach survive the winter safely?

Misgurnus anguillicaudatus is very sensitive to the change of water temperature. Misgurnus anguillicaudatus can be raised all the year round except in the south of China where the annual water temperature is not lower than 15 ℃ and the measures of low temperature overwintering are not considered. in other areas, the feeding period of Loach varies from 7 to 10 months, and there is a low temperature overwintering period of 2 to 5 months. when the water temperature drops to about 10 ℃, Loach will enter the hibernating period. In most parts of our country, Loach usually drills into the soil at a depth of 15 centimeters in winter. Because its body surface can secrete mucus to keep the body surface and its surroundings moist, it won't die even if it doesn't rain for a month.

Misgurnus anguillicaudatus, like many aquatic animals that need to overwinter, must accumulate nutrients and energy to prepare for the winter. Therefore, we should strengthen the feed management before overwintering and feed more nutritious bait to make Loach eat well and make it easier to survive the winter. The feed ratio of Loach overwintering fattening should be 50% of animal diet and 50% of plant diet. With the decrease of water temperature, the food intake of Misgurnus anguillicaudatus began to decrease, and the amount of feeding should be gradually reduced. When the water temperature drops to 15 ℃, only 1% of the total body weight of the Loach needs to be fed every day; when the water temperature drops below 13 ℃, the bait can be stopped; when the water temperature continues to drop to 5 ℃, the Loach will dive into the depths of the mud for the winter. Loach should not only have enough nutrition, energy and good physique, but also have a good overwintering environment.

Select the overwintering breeding site

A pond with leeward and sunny direction, good water retention and thick silt at the bottom should be selected as the overwintering pond. In order to survive the winter, the water storage of the overwintering pond should be deeper than that of the general pond, so it is necessary to ensure that the overwintering pond has sufficient and good water source conditions. The overwintering ponds and tables should be cleaned and disinfected before overwintering to prevent toxic and harmful substances from harming Loach overwintering.

Fertilize the overwintering pond properly

After the disinfection and cleaning of the overwintering pond, before the Loach enters the pond, an appropriate amount of organic fertilizer can be applied, and the manure of pigs, cattle and poultry can be spread on the bottom of the pond to increase the thickness of silt and increase the temperature by fermentation, so as to provide an ideal "hotbed" for Loach to survive the winter.

Choose a good species of overwintering Loach

The Loach species with large size, strong physique, disease-free and injury-free was selected as the parents for reproduction in the coming year. This kind of Misgurnus anguillicaudatus has strong ability of cold resistance and disease resistance, which is beneficial to improve the survival rate of overwintering. The stocking density of overwintering Loach is generally 2 or 3 times higher than that of conventional feeding.

Do a good job of heat preservation and cold protection measures

Strengthen the management of intake and drainage during the overwintering period. During the overwintering period, the water temperature should be kept at 2: 10 ℃, the water level in the pool should be slightly higher than usual, and the general water depth should be controlled at 1.5-2 meters. Groundwater should be used as much as possible when adding new water. Dig pits with a depth of more than 30 cm in ponds or paddy fields, so that the temperature of the bottom layer can be guaranteed to a certain extent. If the pits and slips are covered with straw, the heat preservation effect is better. If the farm courtyard uses a small tunnel to make the Loach pass the winter naturally, the overwintering Loach can be properly concentrated, and the heat preservation of livestock and poultry manure will be more effective.

In addition, the overwintering box can also be used for overwintering. The method is as follows: the wooden overwintering box is made of (90cm) cm × (25cm) cm × (20cm) cm. The box is filled with fine soft soil of 18cm and 20cm, and each box can store 6 kg Loach. The soil and Loach should be packed in layers. When packing, first put 3-4 cm thick fine soil, and then put about 2 kg Loach, so load 3-5 layers, and finally fill with fine soft soil, nail the lid of the box. The lid of the box should be punched with 6 or 8 small holes in advance for ventilation. After the box cover is nailed firmly, choose the overwintering pool which is leeward and sunny, and sink the overwintering box into the one meter below to facilitate the Loach to survive the winter safely.