What does the crab eat? How do you raise it?

Crab is known as "the respect of all kinds of fresh", which is rich in nutritional value and relatively stable in market price. So, what do crabs eat when raising crabs? How do you raise crabs? Let's get to know it together.

What do crabs eat?

Crabs are omnivores and are rich in edible bait. Crab food can be roughly divided into three categories: natural food, artificial animal food and artificial plant food. Natural food includes diatom, Chrysophyta, dinoflagellate, Euglenophyta, green algae, rotifer, bitter grass, verticillium verticillata, Potamogeton crispus, Rabdosia malayensis, turf, duckweed, water lotus, water peanut, golden grass, snail, clam, water earthworm, yellow powder worm, clam, mussel, silkworm pupa, yellow powder worm, earthworm, small fish, maggot, livestock and poultry viscera, etc. Artificial plant baits mainly include soybeans, bean cakes, vegetable cakes, cottonseed cakes, wheat, rice bran, bean dregs, lees, sauce dregs, peanut cakes and so on. In the process of culture, a certain kind of bait can not be fed alone, but should be fed comprehensively according to the actual situation. Only in this way can the efficiency of crab culture be improved.

Second, how to raise crabs?

1. Prepare to raise crabs

The most important thing for raising crabs in rice fields is to prevent escape. with the growth of crabs, there is an increasing demand for living space, coupled with the cultivation in rice fields, the terrain is open, the environment is not closed, and can not be guarded at all times, so it will cause a large number of crabs to flee, resulting in huge losses, so it is necessary to close the rice fields, put up asbestos tiles or plastic mesh around the rice fields, and dig ring ditches in the ridges. When the crab fry, the ditch is wide and 1 meter deep, but as the crab fry grows, the ditch should be widened to about 3 meters.

2. Release crab seedlings

The standard for releasing crab seedlings is 1 jin per mu of rice fields, and about 1500-2000 adult crabs. If you want to shorten the breeding cycle, you can first choose to cultivate crab seedlings in a greenhouse environment and wait for rice to grow to a certain height before releasing.

3. Bait feeding

A small amount of crab culture in the paddy field can form an ecological cycle with the paddy field. The crab eats weeds, duckweed and insects that endanger the growth of rice in the paddy field, and its excreta can also be used as fertilizer for rice growth, but the breeding quantity is more, the food source is not enough, and even gnaws on the rice stem, so it is necessary to feed bait, feed in the early stage, give priority to green fodder in the middle, and match small fish and shrimp. In the later stage, high-protein concentrate feed was fed to make it grow rapidly.

4. Rice field management

In addition to daily feeding, it is also necessary to check the environment of the paddy field. As we all know, crabs like to dig holes, so they should be checked frequently and found that loopholes should be plugged in time, especially in rainstorm season, pay attention to waterlogging and crab escape, pay attention to irrigation in dry season, but not too much, the best water depth is not suitable for rice growth, the best water depth is 6-10 cm, and the water quality is too clear. Crabs are susceptible to diseases, so change the water regularly.

The above is the crab what to eat and how to raise the crab for you. I hope it can help all the farmers!