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Pre-management of Penaeus vannamei outer pond
Release time:
2021-10-14
Pre-management of Penaeus vannamei outer pond
Preparation of 1. Breeding
5. Fertilizer water: Before fertilizer water, use clear water to detoxify an (1 bottle of 15 mu) to sprinkle the whole pool to remove toxins and heavy metals in the water. Select appropriate amount of fertilization in the morning on sunny days, and use diatom probiotics to cultivate basic bait to ensure abundant basic bait organisms.
2. seedling release and seedling stage
1. Selection of shrimp seedlings: Select robust seedlings with uniform individual size, strong swimming ability against water, beautiful appearance and no different colors; Select a seedling farm with large scale, strong technology, excellent quality and good credibility. Select shrimp seedlings that have been tested for virus and vibrio, do not carry virus, and the number of vibrio is within a safe range.
2. Precautions for putting shrimp seedlings: The stocking density is usually about 30000/mu. If the water quality conditions are good, there are oxygen facilities, can be appropriately increased stocking density. Seedlings should be placed in the upper tuyere of the shrimp pond or in the deep water around the pond. Try to avoid muddy pond water when releasing seedlings. The water temperature and salinity in shrimp seedling bags should be kept to a minimum. Two hours before releasing seedlings, the whole pond should be sprinkled with stress detoxification CE(1 bag and 2 mu) to reduce the stress response of shrimp seedlings.
3. Fertilizer and water: raising water is the basic skill of raising shrimp. Good water quality conditions can stimulate the strong appetite of shrimp, reduce the feed coefficient, improve the growth rate, low water temperature and slow fertilizer effect, choose sunny morning fertilization, use diatom Wang with probiotic group live bacteria preparation fertilizer water to produce compound algae phase, depending on the pool water color and plankton biomass for top dressing.
4. Water quality control: The ideal water color of Penaeus vannamei pond should be yellow-green or dark brown formed by green algae or diatoms. During the breeding process, water should be drained and changed according to the color of the water. During the period of poor water quality and tidal water, water should be drained and changed, so as to keep the transparency of the pool water between 30-40cm and the highest water level at about 1 meter. In the early stage of water transfer, it is best to choose living bacteria that assist the growth of algae. Living bacteria that can decompose macromolecular organic matter (such as concentrated bacillus and photosynthetic bacteria) can decompose macromolecular organic matter into small molecules for algae to use), and living bacteria that can regulate algal phase (such as EM Jinlu and probiotic group).
5. Nutrition enhancement: Adhering to the principle of adequate nutrition feeding at seedling stage, natural biological bait is most suitable for adding at seedling stage, so excellent aquatic microorganisms are very necessary. Natural biological preparations such as Fengxibao and Astragalus polysaccharide are mixed appropriately to supplement natural biological bait and promote liver development.
6. Seedling protection (improving the survival rate at seedling stage):(1) Use detoxification, bottom modification and anti-stress products to reduce the impact of the environment, use clear water to detoxify and weideli to optimize the water quality and bottom substance; Stress detoxification CE and hard shell active calcium supplement the physique of prawns and enhance the resistance of prawns. (2) maintain excellent algal phase, regular use of live bacteria, such as EM gold dew, concentrated bacillus to supplement live bacteria nutrition elements. (3) to maintain adequate nutrition, promote shrimp body development as soon as possible
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