Let's take a look at the shrimp culture method:
The aquaculture water source needs (1) aquaculture seawater. The determination of seawater after precipitation and purification conforms to NY5052 standard. (2) Shallow groundwater for aquaculture. Because of the different groundwater resources in different places, the treatment methods are also different. Dig a shallow well along the coast to cooperate with aquaculture in the corresponding area. The data standard of water is salinity 1%, water temperature 17℃ and pH value of 8.0, which meets the standard of NY505 1. (3) Proportion of aquaculture water and disinfection. Seawater and fresh water are mixed in proportion, the salinity is about 20‰, bleaching powder or chlorine dioxide can be put in for disinfection, and compound beneficial bacteria can be added after one week to cultivate water quality.
Select the release mode of prawn fry (1). Shrimp seedlings from regular manufacturers should be selected to ensure disease-free. The water temperature index of the samples cultured in the factory is normal, and the shrimp can be released for culture when its body length is about 1cm. (2) Seed density. The first fry in the north is in early April, the water temperature is 22℃, and the number of prawn larvae is controlled at 300 m2. The second seedling stage is generally in August, and the temperature is generally high in August, so the density is slightly reduced and controlled below 225 strips /m2.
Stocking management of aquaculture water quality (1). The water depth of shrimp seedlings is about 1m, and the pond water is slowly adjusted after one week of seedling release, mainly by adding. The method is to replenish 5 ~ 10 cm of water by flushing every day. When the water level reaches the highest level, the sewage should be discharged and replenished, and the exchange capacity of sewage accounts for about 10% of the pool water. (2) Water quality indicators. Strictly control daily water quality indicators, such as temperature, salinity, pH value, nitrite, dissolved oxygen, etc. Because all kinds of problems will be encountered in the process of breeding, we should pay attention to whether there is an increase in organic matter content or weather problems in the pool when there is a slight increase in the pool. If it is the former, it is necessary to pay attention to the water exchange, and the daily water exchange is not less than 30% of the pool water, and the feeding amount is controlled.