Seedling Technology - Precautions for Fisheries Investment

New ponds were soaked in water for 1 to 2 days and then sterilized. After the old ponds must be drained, the sludge and weeds should be completely removed, and ploughing and rinsing should be used to promote the oxidation, decomposition, and elimination of organic matter, and finally be disinfected.

Common disinfectants include quicklime, bleach, and sodium dichloroisocyanurate. The method of disinfection is generally to fill the culture pond with water of 10-30 cm. The disinfectant is dissolved in water and then poured into the pool. The cement pool is rinsed with water several times before flushing with fresh water. For example, the disinfection of white shrimps of a South American company is carried out 15 to 20 days before planting. The pond is filled with water for 10-30 cm, and the pond is splashed with bleaching powder (41 kg/mu) and strong chlorine (8-10 kg/mu). After 2 days drain the pool water and use quicklime 100~150kg/mu. Quanchiposa, soak in water for 2~3 days. Then drain the pool water and then infuse the water for 20~30cm. After soaking with tea, soak the slag. Pool spilled.

The application of fertilizers in aquaculture waters is an important means to supplement inorganic nutrients in water bodies and increase the productivity of water bodies. However, over-application of fertilizers may deteriorate the water quality of aquaculture waters and pollute the environment, resulting in eutrophication of natural water bodies. Fertilization is mainly used for pond culture of fish, shrimp and shellfish, and for cultivation of large algae such as kelp and seaweed. The use of organic fertilizers should be treated by fermentation, decomposing, disinfecting, and sterilizing. It is forbidden to use untreated organic fertilizers and chemical or biological fertilizers that have not been registered by the national or provincial agricultural department.

After the ponds have been thoroughly cleared and sterilized, plankton can be fertilized and cultivated. When the pond is rich in food organisms and the water quality meets the requirements, it can be ready for planting.

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