Crab farming autumn management measures

After entering the autumn, the crabs have been raised for more than six months and the specifications have grown. The water space and feed requirements are all increasing, and the water level must be raised and the amount of feeding must be increased. As the amount of feed is increased, the pool water becomes inevitably fattened. Once a sudden change in weather (low pressure, stifling days, thunderstorm days), the water quality is extremely deteriorated and devastating losses are easily occurred. Therefore, a series of measures must be taken to ensure the growth of the later period.

1, regulate water quality. Always flush water, flush with fresh water once a week, each time rushing 3-5 cm deep, high temperature weather, when the water quality is rich, but also appropriate water changes, each time about 10 cm, can improve water quality, increase dissolved Oxygen and trace elements, but also to prevent the environment from changing too much, crabs produce stress response. When necessary, two beneficial bacteria such as photosynthetic bacteria or Bacillus can be administered to improve the microbial population in the water, which is conducive to the growth of crabs.

2, protect aquatic plants. The deepening of the fertilizer-added water is very unfavorable for aquatic plants in the pond, and it is very easy to cause water and grass rot and more water in the pool. Therefore, the pool water must be gradually increased, and water grass should be protected by changing the water and using grass-keeping water-removing agents.

3, vote for food. In the early period, the pellets were mainly supplemented with wheat, corn and fresh waterweeds, of which concentrates accounted for 3-5% of crabs, grain feed protein content of 28-30%, after the Mid-Autumn fall, the main cast pellets, protein content 30 More than %, the amount of feeding gradually reduced to about 1% of the amount of crab.

4, refilling snails: acres of live snails put about 500 kilograms to ensure that there are enough live bait crabs later.

5. Skillfully apply chemical fertilizers. Select a sunny day for many consecutive days; appropriate follow-up calcium and other compound fertilizer 2-3 times, not only to supplement the crab micro-supplementation, but also promote the growth of aquatic plants in the pool.

6, pay attention to escape. As the saying goes, "Autumn winds sound, crab legs itch." After the autumn season, crabs come ashore in large numbers, and they must do a good job of preventing fleeing work until the end of the year when the rice crabs are listed at the peak or the beginning of the next year, and then according to market conditions. Gradually began to catch the listing.

Objective To evaluate the methods and the effects of an Airway Management nursing team in clinical practice

Airway Management

Airway Management,Airway Management Devices,Emergency Airway Management,Airway Obstruction Management

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