With preeminent characteristics such as short growth time, quick capital return and many other advantages, the white leg shrimp farming model is currently popular in our country. However, shrimp farming is subject to many risks of natural disasters and diseases. Below we would like to share 4 experiences of whiteleg shrimp farming to help farmers apply effectively and bring high profits.
Preparing the pond
Pond treatment before putting shrimp into farming:
The first thing, we have to drain the water in the pond, scrape off the mud and organic residues in the bottom of the pond, then clean the bottom by plowing and leveling. Dry the bottom for 7-10 days, then soak in water, rinse 2-3 times, then cause water color to prepare for stocking.
When collecting water, it is necessary to leave it for 2 to 3 days to wait for the eggs to hatch, and then disinfect. Can use Corin (chorine) 70% concentration 30-35ppm at 17-19 hours.. After 48 hours, proceed to cause water color.
Check and re-maintain the entire fan system, supply oxygen and collect treated clean water.
7-10 days before stocking shrimp, use nutrient powder such as soybean to mix with water and fertilize the pond daily to color the pond.
Construction of shrimp ponds:
+ Suitable pond area is 0.5-1ha, water depth is 1.5-2m.
+ The high-tide area is a suitable place to build shrimp ponds because it is suitable for water supply, drainage and pond bottom drying when renovating.
+ According to experts who have many white leg shrimp farming experiencethey are very suitable for forms of intensive shrimp farming and are not suitable for living in sandy or muddy bottom ponds, so the pond construction soil must be loamy or sandy soil, low in organic humus, with a tight texture. , hold water.
Experience in breeding and stocking
+ Theo white leg shrimp farming experience of safe shrimp farming, the selection of quality seed also contributes to the success of the crop. Select varieties should test PCR – white spot, scurvy, Taura.
+ When choosing shrimp seed, it must be of uniform size, agile operation, when put in the pot and rotate the water, the shrimp swim against the current, the shrimp is healthy. When the beard and appendages are fully checked, there is no deformity, the intestines are full of food, it can be released. Suitable stocking size is PL12-PL15, body length is 11-12mm.
+ Shrimp stocking density usually depends on the form and conditions of shrimp farming, on average from 70-150 shrimp/m2.
+ Shrimp before stocking must be tamed in the conditions of pH, temperature, and salinity to adapt to the pond environment.
+ Should stand at the head of the wind to release shrimp seed slowly, do not make the pond water cloudy, at the same time observe the ability of shrimp to disperse in the pond, if shrimp gather in clusters, use your hand to gently shake the water to make the shrimps decompose. spread evenly.
Experience in caring for shrimp:
+ Theo white leg shrimp farming experience The food source for shrimp must be 32% protein if reared in low layers and 35% if raised in high floors, a special coefficient because this shrimp variety needs a lot of vitamins and minerals…
+ Shrimp from 1-20 days old should be fed 1.5 kg/100,000 seed, the next day can increase 0.2 kg and should be fed 4-5 times/day.
+ Shrimp from 20 days old or more should be fed 4 meals/day, feeding at night is 50-60% of daytime amount.
+ Note that you should not feed shrimp with poor quality, moldy, expired food or when the pond water is polluted, it is raining, shrimp can’t float, molt.
Management of pond environmental conditions – control of pathogens
– To ensure the amount of dissolved oxygen in the water, a water fan system with bottom oxygen should be used. Should be operated all day, even when feeding shrimp. When it is hot or raining for a long time, it is necessary to open the fan 24/7 to avoid white feces, shrimps are easily shocked and bent.
– Maintain stable water color, NH3, H2S parameters at allowable levels and absolutely do not use products derived from plant protection drugs to treat water.
– Unpolluted water source, pH from 8.0-8.3, salinity from 10-25%.
– The system and equipment are carefully cleaned to ensure the destruction of pathogens and hazards to the next crop.
+ When the algae in the pond grows excessively, farmers need to handle it promptly so that the shrimp do not get sick. It is recommended that people use probiotics to remove algae and stabilize the water color of the pond. After 2-3 days, use Bottom-Up microorganisms to decompose dead algae on the bottom of the pond, cleaning the pond environment.
In good care conditions, after 85-95 days of farming, shrimps have reached commercial size (50-60 pcs/kg). During this period, it is advisable to harvest because from this stage onward shrimp grow very slowly, if continued farming, the economic efficiency will not be high.
This process is highly effective for farming areas with separate supply and drainage channels to ensure sufficient supply of clean water for stocking needs, and to limit disease outbreaks. Hopefully through this article, all farmers and households will have more white leg shrimp farming experience effective.