The weather in the crab pond is hot now, what should I pay attention to?

Now that the temperature is high, what we should pay attention to is the pond water temperature, don't let the water temperature be too high, once the water temperature is high, the crab will be easy to be anorexic or hypoxic, more likely to get sick, and the growth rate will slow down, so when the water temperature is high, it is necessary to put in new water in time to cool down, and it can also improve the water quality, so you can do it.

1. Strengthen water quality monitoring.

Always pay attention to changes in water quality, and deal with problems in a timely manner. The depth of the pool can be flexibly controlled according to the season. Generally, the water level is maintained at 60-80 cm before July, and the water level is kept at about 1 5 meters in the high temperature season after July.

Second, the number of water changes should be moderate.

Changing too much water will cause a stress response to crabs, which is not conducive to growth; Too little can lead to deterioration of water quality. Generally, the water temperature is below 20 C, and the water is changed once every 5 days, and once every 3 days above 20 C. Keep a slight flow of water when the weather is hot and humid, and keep flushing during the hot season.

Water changes are generally performed between 9:00 a.m. and 4:00 p.m.

Third, the bait is fed in the early stage of soybeans, corn, wheat, etc., and some small fish, fishmeal and so on are added in the middle of the period, the temperature is high in September, and the amount of feeding should be reduced, and October is its rapid growth period, and the amount of feeding is increased. After November, the feeding volume decreased. The annual feeding volume generally accounts for 30 in the first half of the year and about 70 in the second half of the year.

Fourth, often patrol the pond and pay attention to disease prevention.

If sick or dead crabs are found, measures should be taken in time. It is necessary to prescribe the right medicine, not to use it indiscriminately, otherwise it will aggravate the condition.

1. Disease prevention: because most of the crab ponds are mainly planted with water peanuts, the water purification ability of water peanuts is weak, resulting in serious eutrophication of the water body, although this eutrophication can be reduced by changing the water, but the overall water quality of the breeding is too thick, so that ciliarisis is a high incidence season in the autumn season, and 2-3 times of insecticide and sterilization must be carried out before wintering.

2. Intensive feeding: Before the crab species enter the overwintering and hibernation period, when the water temperature is above 10, the feeding should be intensified, so that the crab species can accumulate a certain amount of energy for the consumption of the hibernation period. Zhengna feeding nutrition is comprehensive, high-quality artificial compound feed can be used, animal bait can be fed appropriately, the feeding period should be extended as much as possible, and feeding can not be stopped prematurely because of the decline in the overall amount of food.

3. Regulate water quality: Crab species like to live in slightly alkaline or neutral water bodies with fresh and transparent water quality and lush aquatic plants. The suitable pH value of the pond water is 7-9, and the optimal range is that the value is too low, which will lead to swimming and the crab species will not be able to shed their shells.

Dissolved oxygen should be kept above 5 ml liters, dissolved oxygen is too low, crab species produce stress reaction, will lead to an increase in feed coefficient or even do not eat, do not molt, serious will lead to suffocation of crab species.

4. Cold protection and warmth: the ability of crab species to burrow is weak, and for the slope of the pond breeding environment, it is more difficult for crab species to burrow for winter, so measures must be taken to help crab species to keep warm and survive the harsh winter. For example, deepening the water level and increasing the coverage area of aquatic weeds (such as water peanuts, etc.); Crab islands are artificially set up for crab species to inhabit; Or build a windshield wall on the sunny side, and build a greenhouse if possible.

5. When the water temperature reaches below 5, the crab species enter a state of hibernation. The wintering environment where the crab species are located must be kept quiet, and all external factors should be prevented from disturbing the hibernation of river crabs. Maintain a suitable water level, increase the water depth to about meters, change the water in a timely manner, and apply an appropriate amount of quicklime regularly to prevent the water from being acidic.

Ice should be broken in time to prevent hypoxia. If there is a lot of snow on the scaffolding, it should be removed in time to avoid the snow flowing into the crab seed pond. Insist on patrolling the pond every day, anti-rat, anti-theft, and do a good job of recording and laughing at the pond.