Method for improving bottom characteristic of intensive shrimp pond

Abstract

The invention relates to a method for improving the bottom characteristic of an intensive shrimp pond. The method includes the following steps based on the original shrimp aquaculture procedure: stirring bottom mud at the bottom of the shrimp pond by pulling an iron chain, bringing nutritive salt and organic matter at the bottom of the pond to a water body to promote virtuous cycle of the nutritive salt of the water body, pulling the chain once before breeding shrimps, and pulling the chain every 15-20 days according to the weather condition after breeding. At the same time, a bottom ceramsitehanging bag method is adopted to adsorb diatom by 4-6 bags / mu to improve dissolved oxygen at the bottom of the pond, improve the bottom characteristic environment and improve the hardness of shrimp shells and the molting rate, so that the breeding survival rate and output of Pacific white shrimps can be improved obviously. The method has the advantage of being easy in operation, low in cost and free of secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for improving the bottom quality of intensive shrimp ponds. Background technique [0002] Most of the intensive shrimp ponds are affected by the short contract period. Before the shrimp breeding, the silt is not dredged, and the ponds are only sun-dried. There is a serious problem of pond aging. During the breeding period, only the middle and upper water layers can be dissolved in oxygen, and the bottom layer is prone to hypoxia, which is poisonous and harmful. Substances are easy to accumulate, and the main activity of prawns is in the lower layer of the water body. Obviously, the damage to prawns is fatal. In addition, there are a large amount of organic matter and nutrient salts in the bottom mud, which cannot be effectively released, which hinders the material circulation process in the shrimp culture water; and in the later stage of shrimp culture, w...

AI Technical Summary

Problems solved by technology

[0002] Most of the intensive shrimp ponds are affected by the short contract period. Before the shrimp breeding, the silt is not dredged, and the ponds are only sun-dried. There is a serious problem of pond aging. During the breeding period, only the middle and upper water layers can be dissolved in oxygen, and the bottom layer is prone to hypoxia, which is poisonous and harmful. Substances are easy to accumulate, and the main activity of prawns is in the lower layer of the water body, obviously the damage to prawns is fatal

In addition, there are a large amount of organic matter and nutrient salts in the bottom mud, which cannot be effectively released, which hinders the material circulation process in the shrimp culture water; and in the later stage of shrimp culture, with the growth of the shrimp, the feeding amount and excretion of feces increase sharply. The rapid increase of microorganisms in the water body consumes a large amount of dissolved oxygen in the water, resulting in hypoxia at the bottom. At the same time, the outbreak of blue-green algae in the later stage of breeding further contributes to the flames and further deteriorates the shrimp farming environment. All these are important reasons for the low survival rate and yield of shrimp

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