Fish pond anti-leakage seven methods
Leakage of fish ponds directly affects the survival and growth of fish, which not only increases the feed coefficient, increases the cost of water and electricity, and increases the cost of breeding. It also causes slow growth, high fish disease, high mortality, and reduced economic benefits. The mariculturists can seize the cause during the rest of the Tanggu period and rectify the different conditions of the leakage. Here are seven main methods for preventing leakage from fish ponds:
Dredging method
Some fish ponds have been in disrepair for a long time. The silt in the bottom of the pool has accumulated deeper, and the slope of the pool has collapsed and leaked. Once the pond water evaporates, the oxygen-depleted flooding pond (floating fish head phenomenon) can easily be created. For such shallow fish ponds, reasonable plans should be made after fishing and dredging should be conducted so that the normal water depth can be maintained at more than 2 meters.
Mud plugging method
For generally leaking fish ponds, after clear ponds, a layer of finely divided clay is laid on the bottom of the pool and then filled with water to make the clay evenly spread on the bottom of the pool so as to play the role of protecting the bottom of the pond, or adding appropriate amount of water. The clay is mixed into mud and allowed to infiltrate into the gap between the bottom soil particles to reduce water permeability.
Clay bedding
For fish ponds with large sediment content, first drain the pond water, remove the silt debris, and after 15 to 20 days of drying, apply a layer of 15-20 cm thick clay to the bottom of the pool and the slope evenly. Mechanical rolling or compaction. In addition, some grass species can also be sown on the slope to implement turf slope protection.
Rolling method
For old ponds or newly-excavated ponds with large areas, the ground may be mechanically rolled according to the area and degree of infiltration, or the bottom of the pool may be loosely shaved, and appropriate amount of clay or quicklime may be added. Rolling.
Brick lining
For fish ponds with severe leakage, the pool water should be drained first, dredged and dried for several days, and then leveled and bottomed. The slope is lined with stucco bricks, and the surface is smoothed and smoothed with cement. Conditional prefabricated cube-shaped cement boards can be used to paved the pool slopes. The gap between the slopes is filled with cement; the bottom of the pool is laid 20 cm thick. After the clay and quicklime are rolled, or evenly laid 30cm thick clay, add the appropriate amount of water and then mechanically stir, let it dry, forming a protective layer after compaction.
Laying film method
For small-scale fish culture ponds, the four sides of the pond can be leveled and compacted. The mud is wiped with 2 to 3 cm thick and then a layer of plastic film is laid. The bottom end of the film is buried in the bottom of the pool about 15 cm. Soil compaction; the bottom of the pool is covered with clay and quick-lime mats, or evenly laid 20 to 30 cm thick clay, add water or human excreta after mixing mud-like, let it naturally penetrate and dry, so as not to leak.
Water trapping method
For ponds that have been drained and put fish, use woven bags or dense mesh bags filled with loam or clay, tie a line with a rope, draw the bottom of the bag, and repeatedly pull in the fish pond, including the bottom and pool, when the bag When you feel light, you should re-add the clay. The fish pond that has put the fish should first pull 1/2 of the pool and then pull the other half.
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