Key points of tilapia breeding and seedling preservation

There are two methods of clearing the pond: dry clearing and water clearing. Due to limited conditions, wet clearing is generally adopted here. The specific plan is that 15-20 days before the seedlings are placed, 5-10 cm of quicklime with water can be used for disinfection, and the general dosage is 40-80 kg/mu. After 2-3 days, use a dense mesh filter to inject water, and the water depth should be 2 meters.

It is very important to cultivate a pond of good water, which is related to the success rate of seedling placement. If the water quality is too thin, the water body will lack the stability and nutrients needed for the growth of fish fry. At this time, it is recommended to use "Algae Ansheng" to cultivate beneficial algae such as diatoms and green algae. Use the "Double Profit" package every two days (1 pack of "Limiaoduo" + 4 bottles of "Lijunduo" + 10 catties of brown sugar + 400 catties of water, fermented for 1-2 days) to improve the carbon-nitrogen ratio of the water body and maintain the pond biological stability.

Note: Do not use large bags of granular organic fertilizer or chemical fertilizers. Avoid the rapid growth of algae and the single algae phase, which will cause algae inversion, dirty bottom, water change, high pH value, bubble disease, etc.

10-15 days after water cultivation, the zooplankton, phytoplankton, and microorganisms in the water have reached a balance. The typical sign is the appearance of cladocerans in the water body. This kind of water is stable, has strong self-purification ability and normal indicators. This is the best time to put seedlings. good time.

The density of tilapia seedlings should be 20,000 to 30,000/mu. If the density is too high, the bait organisms in the pond will be insufficient, and it is not conducive to insect and disease prevention. The temperature difference between the seedling bag and the pond should not exceed 2 °C. Generally, the seedling bag is placed in the water until the temperature difference is lower than 2 °C, and then the seedling bag is opened and the seedlings are placed. The fry is easy to cause mechanical damage during the operation.

After the fry are placed, the use of disinfectants with high safety and low irritation (such as "Yongle iodine") can reduce the probability of the fry getting sick.

1. Feeding "Benefit Duo" Suspended bait "Benefit Duo" can be fed from the start of seedling release, which has an attracting effect and is helpful for fry opening and nutritional supplement; it can also cultivate zooplankton, stabilize water and prevent air bubbles. Purify water body; use for 7-10 days, the effect of strengthening seedlings is outstanding.

2. Multi-use live bacteria Using the "Double Profit" package can not only increase the bait for fry, but also supplement the beneficial flora of the pond, speed up the circulation of substances, stabilize the water body, and prevent and control bubble diseases.

3.Under normal weather conditions, 7-10 days after the seedlings are released, the oxygen consumption of the fry will increase, which will cause hypoxia and affect the survival rate of the fry. It is recommended to turn on the aerator at around 12 o'clock in the evening to prevent hypoxia and increase oxygen. It can also stabilize water bodies.

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