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1、测水养殖技术（Water measuring culture technique）First, the concept of water measuring and breeding technologyThe technique of measuring water culture is to detect various physical and chemical factors in aquaculture water by artificial method, and take measures to control the suitable conditions for the no
2、rmal growth and development of different aquatic animals. These conditions have already been summed up by the relevant scientific research departments or aquatic experts from research and production practice, and have been data. We must refer to the aquaculture production quantified indicators of wa
3、ter regulation, the maximum to meet the needs of different aquatic animal raising physicochemical factors in water, in order to promote the growth and development, to achieve our ultimate goal in breeding production.Two. The operation method of water measuring culture technologyWater is the living e
4、nvironment of aquaculture animals, and the quality of water directly affects the growth and development of aquatic animals such as fish, shrimp, crab and so on, which is related to the production and economic benefits of aquaculture. Therefore, it is very important to measure the water quality perio
5、dically or irregularly during the production process. Its specific method of measuring water is:1, using water quality testing box for simple test;2, the use of pH meter, dissolved oxygen instrument test;3. Use artificial titration method to test;Three. The standards, variation factors and adjustmen
6、t methods of various physical and chemical factors in aquaculture waterIn aquaculture production process, water physicochemical factors affect the growth and development of culturing object are dissolved oxygen, pH, ammonia, nitrite, hydrogen sulfide, and these factors along with the change of water
7、 temperature, feed and feeding of aquatic animals and plants metabolism and photosynthesis in the constantly changing.1, dissolved oxygenOthers, aquatic animal must survive under aerobic conditions, hypoxia can make the floating head and death. Therefore, dissolved oxygen is one of the life elements
8、 of aquatic animals.1.1 dissolved oxygen requirements in aquaculture waters:Generally speaking, dissolved oxygen in aquaculture water should be kept at 5-8mg/l (mg per liter), and should be maintained at least 4 mg/l. If the low dissolved oxygen can make the growth slow, prone to disease, severe hyp
9、oxia and death; high oxygen will cause fish bubble disease.What are the causes of oxygen deficit caused by 1.2.?Temperature: the solubility of oxygen in water decreases with the increase of temperature. In addition, the oxygen consumption of aquatic animals and other organisms at high temperature is
10、 also an important reason.Breeding density: the greater the stocking density in the breeding pond, the greater the biological respiration, and the biological oxygen consumption also increased, and it is easy to hypoxia in the pond.(3) the decomposition of organic matter consumes oxygen, the more org
11、anic substances in the pool, the more active bacteria, this process usually consumes a large amount of oxygen to carry out, so it is easy to cause hypoxia in the pool.(4) oxidation of inorganic substances: when there is low oxygen inorganic matter in water, it will oxidize and consume a lot of disso
12、lved oxygen. Thus the dissolved oxygen in the tank decreased.1.3. fish and shrimp hypoxia responseMild hypoxia, the fish appear restless, fish floating head, shrimp tend to edge grass, crabs ashore, breathing less feeding or stop feeding; severe hypoxia may lead to the death of fish and shrimp, resu
13、lting in the loss. If the water in the pond is under dissolved oxygen for a long time, the growth of the aquatic animals will stop.Relationship between dissolved oxygen and other toxic substances in 1.4.Keep enough dissolved oxygen in water, can inhibit the chemical reaction of toxic substances into
14、 reduce toxic substances (such as ammonia, nitrite and sulfide) content, such as organic produce ammonia and hydrogen sulfide decomposition; sufficient oxygen in the presence of oxygen, ammonia by microbial decomposition, ammonia conversion converted into nitrate into nitrite, hydrogen sulfide is tr
15、ansformed into sulfate, the final product is produced by non-toxic. Therefore, keeping enough dissolved oxygen in aquaculture water is very important for aquaculture. If oxygen is scarce, these toxic substances can easily reach the hazard level quickly.How does 1.5. increase oxygen?The best and most
16、 convenient way is to inject new water, conditional aerator can be used to increase oxygen. If the condition is not available or the oxygen can be used in emergency, the use of oxygen increasing agent can increase the oxygen level at the bottom of the water body,It can also play a role in purifying water quality.2, pH (PH)The pH value is an important index for measuring water quality, this i
