How to increase the output of crabs? To achieve the following points, the output to strive for another wave!

Autumn is the season for crabs to mature and appear on the market, and for farmers, the income of river crab ponds is their biggest concern. The output of river crab ponds directly determines this year's income, so how to increase the output of crabs? To achieve the following points, crab production to strive for another wave!

How to increase the output of crabs

1. Enhance nutrition

Crab yellow crab cream is a key factor in determining the weight of crabs. Generally speaking, the content of crab roe in female crabs is slightly higher than that in male crabs, which is why there is a great difference in body size between female and male crabs than in weight. As the so-called autumn beautiful crab roe, crab roe crab paste is also the main taste point when people taste crabs, the content and quality of crab roe crab paste also determines the quality of crabs.

The crab roe crab cream in the crab is the gonad and hepatopancreas of the crab, and the nutrition of the crab is mainly stored in this position. The main source of nutrition of crabs is the protein fed by breeders, so efforts must be made to feed high-protein foods at the critical moment of autumn harvest.

But be careful not to blindly pursue high protein, there are two sources of high protein, animal protein food and plant protein food, feeding crabs generally use animal protein food, its digestion and absorption efficiency will be higher, more conducive to crab absorption of nutrients. It can be solved by feeding high-protein feed and high-quality ice fish.

two。 Calcium supplement

Improving the doubling rate of crab shelling is also the key to increase the yield. The content of calcium in water can directly affect the time and efficiency of crab shelling. Crabs can absorb calcium ions in water, which can be understood as crabs can absorb calcium substances that can be dissolved in water. Some farmers use lime to increase the content of calcium in the water, but because the solubility of lime is too low, and the ph value of the water quality is greatly affected, the disadvantages outweigh the advantages, so this method is not recommended.

3. Dissolved oxygen

The content of oxygen in aquaculture water is also very important. if the dissolved oxygen index in water quality is not up to standard, the survival rate is a problem, let alone the yield. In addition, the content of aquatic plants in water is also an important indicator of crab yield and survival rate. Aquatic plants not only provide good concealment conditions for crabs, more than 80% of the dissolved oxygen also comes from aquatic plants. But at night, when the aquatic plants begin to breathe, they have to consume the oxygen in the water, so the content of aquatic plants in the pond should also be controlled, generally between 30% and 50%.

Second, the culture method of crab

1. Prepare for culture ponds

The water quality of crab ponds should be clear, rich in aquatic plants and sunny, usually 1-2 meters deep. Before breeding, the mud at the bottom of the pond should be removed, an anti-escape device should be set around, and quicklime should be sprinkled to do the disinfection work.

two。 Seed selection and seedling release

To select species, we should choose good and pure varieties, pay attention to observe that there can be no injured crabs, disabled crabs, diseased crabs, etc., and choose crab species with good development and strong physique. In order to let the crab seedlings have an excessive adaptation period before releasing, you can set up a temporary culture area in the pond, and the crab seedlings can be released after a period of time. The stocking density should be moderate, controlled at about 2000 per mu.

3. Feed

In the process of breeding crabs, feed should be given regularly, and high-protein meat can be fed before autumn harvest to strengthen nutrition and promote the development of gonads and hepatopancreas, and the meat will be more delicious.

4. Water quality management

Water quality is directly related to the survival rate of crabs, so it is necessary to change water regularly, disinfect, ensure that the water contains a certain amount of fertility, and adjust the water level through the changes of season, temperature and weather.

The above are the key points of the autumn field management of crabs and the introduction of simple breeding methods. In addition, in the process of breeding, we should also pay attention to prevent the invasion of diseases and insect pests, so as to avoid unnecessary losses.