Using Prebiotics in Shrimp Farming

(Baonghean) -In recent years, aquaculture in general and shrimp farming in particular are facing many challenges due to the impact of climate change, shrimp diseases and especially environmental pollution in farming areas. Faced with this risk, many businesses and households have applied biological products (CPSH) to shrimp farming.

The working mechanism of CPSH follows three processes: biological control, life creation and biological treatment. The mutual impact of these three processes brings great benefits to shrimp farming.

CPSH helps decompose organic matter and significantly reduces the slimy layer, reducing the foul smell of water in the pond. CPSH can be used from the pond renovation stage, throughout the farming process. In addition, CPSH is highly compatible, effectively used for many different forms of shrimp farming, from extensive to intensive, super-intensive, raceway farming (flowing water)... Beneficial microorganisms in CPSH not only biodegrade organic waste, reduce toxic gases but also reduce pathogenic bacteria and actinomycetes by consuming all their food. This is a special biological advantage of CPSH, because normally if antibiotics and chemicals are used to kill harmful bacteria, it will affect the beneficial ecosystem in the shrimp pond.

The effectiveness of a CPSH is evaluated based on the number of beneficial bacteria in a unit of mass, the ability of bacteria to survive, the number of bacteria to survive and the time it takes for bacteria to reactivate when introduced into shrimp ponds. In addition, for CPSH to be highly effective, it is necessary to pay attention to a number of factors: water quality, time, dosage... when using.

The biological control process is the beneficial bacteria strains that have an antagonistic effect on pathogenic bacteria strains. Beneficial bacteria strains will overwhelm and inhibit the growth of harmful organisms. In addition, in the process of creating life, beneficial bacteria will develop in the water or shrimp body. When beneficial bacteria develop in large numbers in the intestines, it will help shrimp digest food more effectively, overwhelm or destroy harmful bacteria in the intestines that cause white feces, intestinal swelling, yellow intestines... or beneficial bacteria that develop a lot in pond water will limit luminescent diseases, slime mold...

In the biological treatment process, beneficial bacteria will decompose harmful organic and inorganic substances in pond water, such as nitrite, nitrate... to improve water quality and reduce the risk of disease for shrimp. Biological products (CPSH) are more effective in preventing disease sources than in treating diseases. However, using CPSH will limit the use of antibiotics and toxic chemicals, creating safe products with high sustainability.

In shrimp farming, feed usually accounts for 50-60% of the cost of shrimp farming. To increase the efficiency of feed use, many beneficial bacteria strains are introduced into the shrimp body, helping to digest food, absorb nutrients, limit toxins, inhibit harmful bacteria, and protect the health of farmed shrimp.

CPSH is recommended for use in all stages of shrimp farming, from seed production to commercial farming. This explains why seeds produced on the basis of using CPSH have a higher survival rate and growth than seeds affected by the use of antibiotics or other chemicals. Likewise, when shrimp are small, have weak resistance, and a small ecosystem, it is very important to supplement "beneficial bacteria" for shrimp, especially for the intestines. Beneficial bacteria also secrete enzymes that can separate multi-substances into simple substances, helping shrimp to easily absorb nutrients and prevent digestive disorders. However, to fully promote the effects of biological products, shrimp farmers need to note:

Firstly, the use of CPSH must follow the manufacturer's instructions because some CPSH need "activation" time before being applied to shrimp ponds. For example, the product must be soaked in clean water, at the appropriate water temperature and for a specific period of time... (depending on the type) before use.

Second, use the correct dosage per unit area (or volume). Using a higher dosage is both ineffective and costly.

Third, shrimp farmers need to monitor water quality and shrimp condition before using CPSH.

Fourth, do not use CPSH with antibiotics or chemicals to treat shrimp diseases. Do not use many CPSH at the same time, use them alternately and at intervals according to the prescribed time and should use the product when it is sunny (8-10am).

Fifth, with products mixed with feed: do not leave feed mixed with CPSH for too long, cover the feed with oil before feeding to shrimp to increase efficiency.

To determine the effectiveness of CPSH, shrimp farmers need to test pond water samples before using CPSH, thereby determining the density of beneficial organisms in the pond or the concentration of toxic gases. After using CPSH, retest the water for control. If the density of beneficial microorganisms increases and the concentration of toxic gases decreases, this product can be used.

Tran Trung Thanh