5 steps for successful crab breeding

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There is a direct relationship between the amount of annual income of crab farmers and the breeding of moss. According to investigations and studies, the moss is caused by excess phosphorus in the pool of sugar water, so it is necessary to avoid single application of phosphate fertilizer. In addition, the moss needs to absorb the fertilizer and nutrients in the water during the growth process to make the water thin, and it will pollute the water after death. So the breeding of moss had to be prevented.

To prevent the outbreak of mosses, we must make the usual work fine. Before July, we must use biological fertilizers and water in small quantities to maintain the transparency of water bodies at 30-40 cm. This environment is not suitable for the growth of moss and can effectively control moss. Although it is not easy to do this, there are no shortages of successful cases in various breeding areas.

1 During the middle period of the cultivation of dirty crabs in aquatic plants, aquatic plants may attach some sludge or some cilia due to insufficient vitality. Dirty grass is treated with sludge with amino acids + Bacillus. If some cilia are attached to the grass, it is recommended to use some drugs containing zinc sulfate before detoxification. If the aquatic plants are not sufficiently vibrated, they should be dealt with again in a few days. The most fundamental thing is to enhance the vitality of aquatic plants by using fertilizers such as amino acids.

2 With the increasing density of fish farming, the activity of crabs at night increases, and the ability to purify aquatic plants is sometimes insufficient. When the temperature difference between day and night is too large in May, water body turbidity often appears. The long-term turbidity of the water body will affect the growth of aquatic plants, so the water mix is â€‹â€‹a problem that farmers have to face. The author through exchanges with farmers to come up with some suggested treatment methods: the first day of superphosphate 5kg/mu, the second day of the morning use of biological fertilizers and fertilizers (full amount), and increase the amount of feed as appropriate.

3 crab crab grass in the high temperature season after the sudden change of the weather or other stress conditions will be a lot of grass clippings, especially Vallisneria. In some areas where Vallisneria is planted, a small number of grass-growing farmers are also acceptable. However, a large number of bitter grasses will be contaminated and contaminate the water and damage the culture environment. Everyone knows the phrase "crab size looks at plants." In a pond without aquatic plants, the water quality cannot reach a good state, and the crab doubling rate will be significantly reduced. Therefore, at this time, farmers will try their best to stop crabs from clipping.

A common method of preventing crab clippings is to place a Twist-Screw screw in the growth area of â€‹â€‹Vallisneria, and then use a detoxification anti-stress product to reduce the crab stress response while feeding some good feed.

4 The problem of cyanobacterial cyanobacteria has been debated academically and it is also a worldwide problem. There are also two situations in crab farming. In the sorghum farming mode (Elemus, Vallisneria, Hydrilla verticillata, Ceratophyllum all have planting), as long as the plants in the pond account for more than 40% of the total area, cyanobacteria are generally difficult to break out; Algae account for the majority or only for the cultivation of Elodea. Even if the water grass coverage is high, cyanobacteria will still burst out. This problem has also plagued the majority of technical personnel. Individuals suggest that introducing as many species of aquatic plants as possible in the future breeding process may have an unexpected effect on inhibiting the cyanobacterial outbreak.

The success rate of cyanobacterial processing is not very high, but there are also some successful cases: the use of "superphosphate (3kg/mu) + Bacillus" in the early stage of cyanobacterial growth; there is also a treatment method that uses a sufficient amount of photosynthetic bacteria and uses it twice. Take precautions against hypoxia.

5. Poor water quality Maintaining good pool water quality and conducting benign eco-culture are also important means for high-quality crab production. Pools with good water quality have strong desires for crabs, strong food intake, high rates of digestion and absorption, high survival rates, and rapid growth; ponds with poor water quality will have opposite effects. Therefore, in the crab breeding process, it is necessary to improve the dissolved oxygen content of the water, reduce the concentration of harmful gases, prevent the pollution of the water in the pond, and create an excellent water environment, which can effectively promote the growth of crabs, reduce the feed coefficient and the cost of breeding.

In the breeding process, the population and density of plankton in the pond can be regulated through the scientific use of the aquatic product water quality conditioner or water exchange. Gemba Aquatic Water Conditioner is a microbiological water conditioner. Once activated by water, microorganisms can effectively decompose the organic matter in the pond into inorganic salts that can be absorbed and used by floating plants and animals, and continuously produce plenty of palatable floating plants and animals for the crabs. Greatly reduce the amount of artificial feed, reduce the bait coefficient. For the protection of daily water quality, it is recommended that 0.2-0.3 g of aquaculture water conditioner be applied to each cubic meter of water and used every 15 to 20 days.

The crab farmer should take precautions and supplement the treatment. In the initial stage of breeding crabs, they should begin to pay attention to regulating water quality and apply scientific fertilization.