[First-line Case] Key Points of Crab Tangkou Management in June

In June, it entered the high temperature period. The water quality in the crab pond mouth was generally strong, and cyanobacteria appeared in some ponds. More diseases.

[First-line Case] Key Points of Crab Tangkou Management in June

         In June, it entered the high temperature period. The water quality in the crab pond mouth was generally strong, and cyanobacteria appeared in some ponds. More diseases. The majority of farmers must seize the opportunity to take precautions. Because of the particularity of aquaculture, aquatic animals live in the water and cannot clearly control the growth and feeding situation like terrestrial animals. Once the disease occurs, the number will be large. Therefore, the majority of farmers can not wait until the water quality is broken, the aquatic plants are rotten, and the crab is ill before treatment, but should take precautions and take precautions according to the weather, water quality and other conditions.

1. regulation of water quality

In the middle and late stages of crab culture, the temperature rises and the amount of bait gradually increases, so that the residual bait feces increases sharply. In addition, many farmers in some areas feed ice fish, which further deteriorates the water quality of the pond, resulting in imbalance of water quality, bottom quality and nutrition of the pond.

Prevention and treatment measures:

1, change the bottom frequently, use oxidizing to change the bottom,Super bottom netCooperationStrong decomposition bottom modification. Permeable sediment, increase water permeability, oxidation of organic matter at the bottom, decomposition of residual bait feces. The modified bottom product should be used once every 7-10 days.

2. Complicating bacteria frequently:

① The water quality is relatively clear at Tangkou,Lactic acid bacteria stock solutionCooperationsuper golden fungusUse, can balance the water ph value, inhibit harmful algae reproduction.

② Water quality is relatively dense at the mouth of the pond,Bacillus concentrateCooperationsuper golden fungusUse, can adjust the transparency of water bodies, decomposition of organic matter in the water, effectively reduce ammonia nitrogen, salt and other harmful substances, can block the source of nutrients harmful algae inhibit its growth.

③ Tangkou with cyanobacteria: availablelactic acid bacteria speciesSprinkle after expanding culture, 10kg per mu, can be sprinkled for a long time to achieve the purpose of preventing and killing cyanobacteria.

Maintenance of 2. aquatic plants

As the temperature rises, the vitality of Elodea (low-temperature grass) is getting worse and worse. If we do not take measures to protect the grass in time, the phenomenon of rotten grass and drifting grass will occur, resulting in low coverage of aquatic plants and seriously affecting the growth of shrimps and crabs.

The filamentous moss attached to the aquatic plants should be killed in time in fine weather,Moss water netWith the use of sodium humate, blocking the photosynthesis of moss, decomposition of moss, keep the leaves of Elodea fresh.

In case of yellowing and blackening of the roots of Elodiella, the causes should be found out and dealt with in time. Ponds with thick grass must be pulled in time, grass heads must be beaten, and grass heads must not be connected into whole pieces, leaving space for grass to breathe. Ponds with serious drug residues and excessive heavy metals should be used first.Detoxification and Water Protection TreasureDetoxification,Double-effect bottom modification, after changing the bottom through the bottom mud, use the applicationLong Root Grain God+vital element; Slight stems and leaves of aquatic plants belong to serious lack of fertilizer. Long grass and strong root fertilizer should be supplemented in time.

For foliar-attached muddy Elodea, usingGrass pollution net+algae carbon sourceSplash. For rough leaves, no greasy feeling, leaf surface calcification precipitation, useBishui Jiedu AnnSprinkle the head of grass. Keep the Elodea fresh.

3. preventive health care

In the middle of the breeding period, with the complication of water quality and the continuous increase of feed intake, the liver load of river crabs is increasing. We must do a good job of protecting liver in time and take it orally for a long time after June.Gangdan Kangtai+Natural AstaxanthinImprove immunity and protect the liver. Prevention of water crazies.

Some crab farming areas are mostly pond mouths where chilled fish are fed, and chilled fish should be treated scientifically before feeding. As the temperature rises, chilled fish is easy to rot and stink. If it is not handled properly, it is easy to induce crab disease.

Ice fish should be washed with water before feeding, washed with pure blood water and meat foam, and then usedEM Golden DewInfiltrated ice fish after one hour. This can greatly reduce the risk of directly feeding ice fish to infect river crabs with harmful bacteria and destroy the water quality of the pond.

4. disease prevention and control

In the early days of this year, there were too many rainy weather and poor eating of river crabs, resulting in poor physique and weak resistance of river crabs. In addition, in some areas, fresh ice fish is commonly used as feed. After the temperature rises, fresh ice fish is easy to damage the water quality and carry bacteria into the cultured water body, causing river crabs to be infected with bacterial diseases. Therefore, the recent outbreak of vibrio infection diseases such as enteritis, roma and edema, etc.

Prevention and treatment programs:

Bottom modification: use oxidizing bottom modificationWeedley.It can improve the bottom environment and kill bacteria at the bottom.

Outpouring:Zhongren Gold Iodine+Wuhuang Jiedu Liquid. Kill water harmful bacteria.

Internal: AntibioticsEnrofloxacinorFlorfenicol+Gangdan Kangtai+Aquatic special multi-dimensional. Improve the crab physique, protect the crab liver, kill germs in the body.

Contributor to this article: Meng Qiang, Zhang Chuanbao

Reviewed and edited by: Xu Xiang

Editor-in-Chief: Zang Xueyun