The pathogenic factors in fish and shrimp breeding: First, the nursery pond water environment is poor. Due to the higher larval density of fish and shrimp larvae and the larger amount of feed, the accumulation of residual baits and metabolic wastes tends to make the pond water environment worse, pathogenic microorganisms breed, and causes larvae to become pathogenic. The use of Chinese herbal medicines to prevent diseases during the nursery process can regulate the metabolic balance of larvae and affect the water environment of nursery ponds and play a role in disease prevention.
The second is broodstock malnutrition. In the process of shrimp and crab breeding, artificial bait is used more often, which often results in maldigestion and malabsorption of larvae, resulting in a decline in the physiology of larvae, weakening the resistance to pathogenic bacteria, and being susceptible to disease. Chinese herbal medicine can play a certain role in balancing certain malnutrition foods and prevent diseases. In addition, some Chinese herbal medicines also have obvious attractant properties.
Third, harmful microorganisms. Although selection, sedimentation, sand filtration, and disinfection of water for nursery use are performed in the course of fish and shrimp breeding, harmful microorganisms such as bacteria, fungi, and viruses cannot be completely killed. As the nursery progresses, they will breed and develop. , against larvae.
A kind of Chinese herbal medicine often contains a variety of chemical components, but not all components can play a role in the prevention and treatment of diseases. The effective components that can prevent and treat diseases mainly include polysaccharides, alkaloids, hydrazines, volatile oils, and tannins.
Garlic: It has a broad-spectrum antibacterial effect and has a killing effect on viruses and protozoa. It is a highly effective antibacterial and insecticidal herb. When used as a bactericide, it should be freshly prepared and used immediately.
Coptis: Its active ingredient is berberine (ie, berberine). Coptis has a broad-spectrum antibacterial effect, can inhibit the growth of a variety of Gram-positive and negative bacteria, inhibition of a variety of fungi, and also effective for some viruses, protozoa and so on. In addition, berberine also has the effect of enhancing phagocytic ability of phagocytic cells in animals.
Huang Wei: Huang Shaoyuan is its main active ingredient. Astragalus has a broad spectrum of antibacterial activity, inhibits Gram-negative and positive cocci, and has some effects on some viruses and many fungi.
Rhubarb: Contains anthraquinone derivatives such as emodin, rhein, and aloe-emodin, which have antibacterial, antifungal, and antiviral effects. It has a significant inhibitory effect on bacterium. In addition, it also has astringent, diarrhea, increase platelets, promote blood coagulation. Gallnut: Contains tannins and other ingredients, both Gram-negative and negative inhibitory effect on the fungus (watery mildew) has a good control effect, but also has hemostasis, detoxification, convergence and so on.
Daqingye and Banlangen: Its active ingredients are Daqingsu, wolfberry and so on. Both have extensive antibacterial and antiviral effects and detoxification. Among them, Banlangen has a strong antiviral effect.
Heat meters are one kind of meters measuring the heat
consumption. In order to save the energy and decrease the environment
pollution, the heat meters are more and more popular for the modern buildings.
Heat meters can realize centralized heating supply. Now with the rapid
technology development, the heat meters also experience a fast way of growing
up. Now the government of the world starts to pay much attention to the
building remolding and new buildings heat meter installation. As the new type
of energy calculation, the heat meters have the advantages of higher accuracy,
energy saving and easy installation.
From the functions of the different types of heat meters, there are mechanical
heat meters, digital heat meter,Ultrasonic Heat Meters, M-bus Heat Meters and also wireless heat
meters. Our company, Berggruen Technology Co.,Ltd never stops the steps for
further higher technology research and development. We are devoted to study the
new technology in the world to make better quality heat meters.
Heat Meters,Mechanical Heat Meters,Ultrasonic Heat Meters,M-Bus Heat Meter,Digital Heat Meter
Berggruen Technology Co.,Ltd , https://www.meter-technology.com