Why should aquaculture ponds be cleared? What are the specific methods?

Pond culture refers to the use of ponds for the production of aquatic economic animals and plants. A pond is a body of water smaller than a lake. Then why do aquaculture ponds need to be cleared? What are the specific methods?

Why should aquaculture ponds be cleared?

Aquaculture pond cleaning is an important work directly related to aquaculture benefit and disease prevention and control, but a large number of farmers do not pay enough attention to this work due to various reasons, which will bring many adverse factors to fishery production in the coming year.

The harmfulness of non-cleaning ponds: due to years of high-density culture, dead organisms, fish residual bait, feces and organic matter continue to deposit, with the advent of the culture season, the water temperature increases gradually. a large amount of humus in the water decomposes and consumes a large amount of dissolved oxygen under the action of bacteria, and it will also release hydrogen sulfide, ammonia and other toxic and harmful substances, causing damage to the fish. At the same time, the lack of dissolved oxygen leads to the slow growth of farmed fish, the increase of feed coefficient, the frequent occurrence of fish diseases and the decrease of per unit yield. in serious cases, there will be the phenomenon of fish death in floodpond, resulting in great economic losses to farmers. Therefore, pond cleaning has a very important practical significance for farmers to improve economic benefits.

What are the specific methods of clearing aquaculture ponds?

The method of clearing the pond:

1. Quicklime pond cleaning method:

(1) the pool water is 5-10cm, and 50-80kg per mu of quicklime is used. Dig several small pits in the pool, add quicklime to the pit and dissolve it into lime paste, then sprinkle it evenly on the whole pool.

(2) when the water depth of the pond is 1m, use quicklime 125-200kg per mu, dissolve quicklime into lime slurry and sprinkle it all over the pond.

Note: it takes 7 days for quicklime to clear the pond. Quicklime should be blocky, light, free of impurities and react violently after meeting water.

two。 Bleach cleaning pond: bleach contains about 30% available chlorine, 13.5kg (20ppm) is used for 1m water depth per mu, and 5-8kg is used for 5-10cm per mu of water. The method is to sprinkle the bleach evenly throughout the pond immediately after dissolving the bleach, and the fish can be released 5 days after clearing the pond.