One is due to the fact that there is a large difference between the areas and the pools, between the species, between the shrimp ponds, and even between different parts of the same shrimp pond. For example, shellfish are found in different shrimp ponds. Some grow fast near the water inlet, and some grow close to the water outlet. Some prawn ponds have serious eutrophication. Not only do the shrimps grow badly, but they also affect the growth of shellfish and even occur. Shellfish died. Therefore, we must not imbue other people with the experience of polyculture. We must implement polyculture in a scientific manner according to our actual situation. Second, we must select good shellfish varieties to select those with the ability to adapt to eutrophication, suitable temperature, suitable salt range and shrimp pool water temperature, salinity changes in the range of basic and rapid growth, high value of the fine varieties. Third, a rational distribution of shellfish in order to facilitate the capture of shellfish, should be more centralized use of stocking, the general area of ​​shrimp farming pool of 15% to 25% of the total area. Taking into account the tolerance of the shrimp pond productivity and the convenience of catching, the end of the shrimp pond outlet with good water quality should be properly broadcasted; the shrimp pond with poor water quality should be properly broadcast at the end of the inlet. Fourth, timely sowing seedlings If conditions allow, Bei Miao as soon as possible the better, but the spring Fangmiao must be carried out after the fat pond. Fifth, we must grasp the appropriate density of shrimp shellfish based on the size of shrimp ponds to play the role of ecological regulation of shellfish. Shrimps have higher stocking densities and more feeding, shrimp ponds have higher primary productivity, and shellfish stocking densities can be larger. Appropriate shrimp stocking density is a key factor in preventing deterioration of water quality. Sixth, to properly control the depth of the shrimp pond The appropriate increase in water depth is beneficial to increase the amount of shrimp in the shrimp pond, but the organic matter in the bottom of the intensive shrimp rearing pool has more sediment, the light is weak, and the deeper the pool water, the more prominent this problem is. Shellfish are at the bottom of the floor and the water is too deep to reduce the flow rate of the pool water, which is detrimental to shrimp and shellfish. Therefore, the pool water is not as deep as possible and must be adapted to local conditions. Seventh, willing to invest in additional oxygenated equipment At present, China's shrimp production to solve water quality problems, the general use of water change, but this way to sink into the pool of organic matter out of the basic productivity loss and more. Shrimp pond water quality deterioration is often caused by severe lack of oxygen. If the amount of water exchange is appropriately reduced and oxygenation equipment is added, this problem can be effectively solved and the ecological efficiency of shrimp ponds can be improved. Eighth, we must pay attention to routine management, inspect and sample frequently, observe the water quality and the growth of shrimp shells in time, establish regular measurement and recording procedures, and find out the anomalies. Emergency remedial measures should be taken to ensure that hardship is not destroyed.
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