The fishy smell of squid is similar to that of other freshwater cultured fish. Its origin is mainly due to the release of chemicals released from the algae such as Oscillatoria, Aquilegia, and actinomycetes in the culture water during the growth and reproduction process. In the water, it infiltrates into the muscles of the squid, causing the squid to produce a special smell of earthy odor.
The earthen pond raises alfalfa, uses the algae to maintain the ecological environment of the pool water, consumes the organic matter of the water body and some harmful chemicals to the salmon, and reduces the amount of water exchange, which helps the normal growth of the catfish. However, algae will rapidly multiply and grow in an environment of suitable water temperature and rich organic content, resulting in a large amount of chemical substances. The large amount of feces excretion and residual bait produced by silt in the bottom of the pond, and the residual bait that is lost provide good nutrient conditions for algal reproduction. In the season when the water temperature is high, algae multiply, and it is difficult to control the algae quantity even if the water exchange is increased. Sex. Soil ponds and large areas of intensive intensive pools are suitable for the growth and reproduction of algae and actinomycetes. Algae and other chemicals that cause odor and smell of squid are maintained in aquaculture for a long period of time. The produced squid is prone to produce soil. Smell, especially in the high temperature period from July to October.
How to effectively prevent earthworm smell from squid production in aquaculture production? Controlling bottom sediment in the pool, reducing sludge content in the bottom of the pool, and reducing the source of organic matter in the water during cultivation are the key factors. At the end of a breeding cycle, dry pool should be exposed to the bottom of the pool, and the bottom sludge should be cleared out of the aquaculture pond. During the aquaculture process, the organic matter content of the water should be controlled; the water source with low organic content should be selected; the water exchange volume should be increased; the water quality improving agents such as quicklime, zeolite powder and ion exchange and complexing agents, oxidants, etc. should be regularly used; while the use of probiotics should be stable. The algae phase, cultivation of water color, inhibition of actinomycetes, trembling algae and anchovy algae are unique in their growth and reproduction. It can also use its strong selective ion exchange capacity of the active group to achieve the effect of regulating and improving the bottom material. The regular use of probiotics can eliminate many problems and inconveniences such as the disinfection of large amounts of water and the decline in the amount of fish eaten. It is economical and quick, and it can fundamentally eliminate the production of earthy smell.
The squid that has a taste of earthy smell can be removed after being treated with clean water and water, and at the same time, the use of seaweed extract can achieve the dual effects of improving meat quality and eliminating soil odor. In short, regular use of probiotics to regulate water quality and the addition of seaweed extract in feed can effectively prevent the occurrence of earthy smell.
Hematology analyzer is also called clinical blood cell analyzer, blood cell analyzer, blood cell analyzer, blood cell counter. The blood analyzer not only improves the accuracy of the experimental results, but also provides many experimental indicators, which play an important role in the diagnosis and differential diagnosis of diseases. Hematology analyzer is one of the most widely used instruments in hospital clinical testing.
Test items
Blood cell test refers to routine blood test, which is manual operation and counting under the microscope at first. It includes red blood cell, hemoglobin, white blood cell count and its classification, platelet count, etc. There are more than 20 items.
clinical significance
1. The blood analyzer is mainly used to detect various blood cell counts, white blood cell classification and hemoglobin content.
2. Hematocrit: obtained by multiplying the average volume of red blood cells by the red blood cell count.
3. Red blood cell distribution width: represents the degree of consistency of red blood cell size. When the red blood cell size is uneven, the red blood cell distribution width value increases, such as various types of nutritional deficiency anemia.
4. The three average indices of red blood cells are used to identify the type of anemia.
(1) The average hemoglobin content of red blood cells: increased in megaloblastic anemia, decreased in iron deficiency anemia, chronic blood loss anemia, uremia, chronic inflammation.
(2) Mean volume of red blood cells: increase in hemolytic anemia and megaloblastic anemia; decrease in severe iron deficiency anemia and hereditary spherocytosis.
(3) The average red blood cell hemoglobin concentration: decrease in chronic blood loss anemia, iron deficiency anemia; various diseases can be in the normal range. In megaloblastic anemia, the mean red blood cell volume increases, the mean red blood cell hemoglobin amount increases, the mean red blood cell hemoglobin concentration is normal, and the red blood cell distribution width increases.
5. Average platelet volume: the average volume of each platelet, the size of platelets is related to its function.
(1) Increased: seen in patients with idiopathic thrombocytopenic purpura, edema and proteinuria in late pregnancy.
(2) Decreased: seen in non-immune platelet destruction, aplastic anemia, thrombocytopenia repeated infection syndrome, chronic myeloid leukemia, etc.
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