In order to "prevent and control water pollution in fishery waters, and ensure the normal growth, reproduction, and quality of aquatic products of fish, shrimp, shellfish, and algae," the State Environmental Protection Administration promulgated the "Fishery Water Quality Standards" in 1989, proposing fishery water Standard indicators and monitoring methods. After the unremitting efforts of the vast number of fishery workers and breeding professionals, the proportion of China's aquaculture industry in the agricultural output value structure is constantly increasing, and it has gradually become one of the pillar industries of agriculture. However, with the continuous development of industry and agriculture, pollution of the environment by chemical fertilizers, pesticides, industrial sewage, and wastewater from the chemical industry, especially the water quality of rivers and lakes, has caused great damage to the aquaculture environment. The quality of aquaculture water quality is directly related to the growth and development of aquatic animals such as fish, shrimp, crabs and turtles, and thus to the output, quality and economic benefits of the aquaculture industry. For this reason, the protection of the fishery environment and the analysis and monitoring of the water quality of fisheries aquaculture are very necessary.
The water in fishery farming waters is the living environment of farmed animals. Every aquaculture animal needs a water quality environment suitable for its survival. If the water quality environment can meet the requirements, aquaculture animals can grow and reproduce. If the water in the water quality environment Subject to certain pollution, some water quality indicators are beyond the range of adaptation and tolerance of aquaculture animals. The lighter ones cannot grow normally, and the heavy ones may cause a large number of deaths. In order to prevent the environmental damage of aquaculture caused by water pollution, it is necessary to analyze and monitor the water quality of the aquaculture environment, and control the water quality through scientific methods to meet the water quality requirements for the normal growth and development of aquaculture animals
1. PH value is an important indicator of water quality
Second, dissolved oxygen is the life element of aquaculture animals
Third, the main harmful substances in the aquaculture water area PREFIX = O
Due to environmental pollution, harmful substances such as ammonia (NH3), nitrite and hydrogen sulfide are present in aquaculture waters.
1. Ammonia (NH3)
2. Nitrite (NO2 ~)
3. Hydrogen sulfide (H2S)
Fourth, water quality monitoring
The water quality monitoring project of fishery aquaculture area mainly monitors the following items:
1, PH value
2. Dissolved oxygen
3. Ammonia concentration
4. Nitrite
5. Hydrogen sulfide
6, residual chlorine
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