How to build anti-escape facilities in crab ponds

In order to prevent the river crab from escaping, anti-escape facilities should be built at a distance of 0.3 to 0.5 meters from the crab pond. The escape prevention facilities in crab ponds are:

1. Agricultural plastic film fence

The anti-escape wall of the crab pond is 0.5-0.7 meters high (the 1-year-old crab pond can be slightly lower) and buried 0.15 meters in the soil. The anti-escape wall is slightly tilted 60 angles to the inside of the pool, and its inside is smooth and has no support. The corner of the anti-escape wall is in an arc. The placement method is as follows: first, the wooden pile is used as the pillar, the lead wire or plastic rope as the skeleton, the double-layer film is folded in half, the two lower ends are combined and pressed into the mud for 0.1mm and 0.15m, and the upper end is mounted on the lead wire or plastic rope, requiring the film to be taut and straight. This method has the advantages of low cost, convenient installation and no resistance to strong wind, so it needs to be repaired and replaced in time. This kind of anti-escape facility is mainly used for crab breeding or crab raising in rice fields.

2. Calcium plastic board and aluminum fence

In the pool ridge with 0.8 meters high calcium plastic board or aluminum skin buried in the soil 20 cm compaction, with a screw hole in the steel bar or wooden column as a pile, the board hole is fixed on the pile. This method has the advantages of light weight, convenient transportation and installation, low cost and good anti-escape effect, and the general service life is 3-4 years. This kind of escape prevention facility is mainly used for adult crab breeding.

In addition, in order to prevent frogs, ducks and other enemy creatures from jumping into the crab pond, it is necessary to surround the pond with polyethylene mesh (4 mesh / cm 2). The bottom of the net is buried in 10 cm, and the net is 1 meter high to form a frog net. The distance between the frog net and the anti-escape wall is 0.5-1m.