It is the seedling release season again. During this period, the temperature rises. Farmers in many areas are releasing crab seedlings. In order to ensure the safety of the parents’ home and the survival rate of the crab seedlings, Jin Nannong is here This recommendation is for our patented product - solid hydrogen peroxide, to be used as a reference for farmers and friends during the crab feeding period...
1. Solid hydrogen peroxide
Liquid peroxide Hydrogen, commonly known as hydrogen peroxide, is an excellent disinfectant and oxygenator, but it has low safety, poor stability, and inconvenience to use. In order to improve the safety, stability and ease of use of hydrogen peroxide, Jiangsu Nanjing Agricultural and Animal Pharmaceutical Co., Ltd., after several years of continuous testing, finally selected a feasible inert material to lock H2O2 in an octagonal cage structure. , to obtain a highly safe and stable crystalline solid - solid hydrogen peroxide. Solid hydrogen peroxide retains the disinfection, sterilization, strong oxidation, high oxygen content, safety, and environmental protection characteristics of liquid hydrogen peroxide, and is suitable for different growth stages of various aquaculture animals.
2. Analysis of crab seedlings landing
1. The seedling pond is far away from the adult crab pond, and the water quality and soil environment are different. The seedling reaction is relatively large, and the seedlings swim to the pond at night. , some crab seedlings came ashore, which was an environmental stress response caused by environmental changes.
2. The soil in the newly opened pond mouth is relatively soft, and the water in the pond has been soaked for a long time, causing the pesticide residues in the soil to be released and accumulated at the bottom of the water body, causing poisoning reactions in crab seedlings.
3. At the end of the year, pyrethroids were used to clear the pond at Laotangkou. However, the drug residues were not treated in time, and the seedlings were poisoned and stretched their claws, causing a large number of crab seedlings to come ashore.
4. The body constitution is poor, the liver is swollen and the claws are grinding, and semi-mature or mature crabs have come ashore.
5. Fetch water from the water inlet. Crab seedlings have the biological habit of resisting water. Drawing water will cause water turbidity. At this time, if crab seedlings gather in large numbers, some seedlings will come ashore.
6. Ammonia nitrogen and nitrite at the bottom of the water body suddenly increase, water quality indicators change, and some crab seedlings will come ashore and crawl to the edge.
Guo Gangzhu of shrimps and crabs releases seedlings
3. Why drug residues cause crab seedlings to land
Many farmers in river crab breeding areas are accustomed to using organophosphorus and pyrethroids Pesticide-like pond clearing, some pond mouths are even treated with a variety of pond clearing drugs, resulting in more drug residues adsorbed in the sediment. However, the drug residue lasts for a long time at low temperatures, and most of the drugs remain in the sediment. As the temperature rises, the toxins in the bottom mud are rapidly released and stored in the bottom water. After transportation, the vitality of the crabs becomes weaker, the body's metabolic level decreases, and it is unable to resist the toxins. At the same time, the drug residue causes damage to the hepatopancreas. Because of the damage, the toxins in the body cannot be better transformed or excreted from the body, so the crab fry are easily poisoned and land in large numbers. If it cannot be dealt with in time, it will cause huge hidden dangers for later breeding. Problems such as liver disease, hepatopancreatic syndrome, and hepatopancreatic atrophy are all closely related to drug residues. This situation occurs during the day and night, and the crabs that climb ashore are slow in movement and unresponsive. They usually curl up on the shore to form "stiff crabs" and do not go into the water when they go ashore. Experiment on the impact of pesticide residues on crab seedlings
Through comparative experiments in nearly a hundred ponds, it was found that solid hydrogen peroxide can solve a series of problems caused by pesticide residues better and faster. Using solid hydrogen peroxide before releasing crabs can not only effectively remove drug residues, but also accelerate the metabolism of crabs, discharge toxins from the body, reduce damage and impact on the hepatopancreas, and prevent A large number of crab damage occurs.
IV. Principle of solid hydrogen peroxide treatment of drug residues
Hydrogen peroxide oxidatively degrades organophosphorus and pyrethroid pesticides, which is a new direction in chemical oxidative degradation methods. It is becoming a hot topic in domestic and foreign research. H2O2 generates a large amount of free radicals OH (redox potential is 3.06 volts) during the oxidative degradation process. Its characteristics are: ① The free radicals -OH generated are large in number and very active. They are intermediate products of chemical reactions and can induce subsequent chains. Reaction; ②-OH free radicals react directly with pollutants such as drug residues in the water body without choice, degrading them into CO2, H2O and inorganic salts, without causing secondary pollution. The inorganic salts produced at the same time can be used for algae and aquatic plants. The growth provides a source of nutrients, which further accelerates the decomposition of drug residues in the water body and enters a virtuous cycle. Many farmers do not pay much attention to the treatment when releasing seedlings in the early stage, and even use some inferior products, which has a double stimulation to the crab seedlings, resulting in more seedlings being damaged, and serious damage to crabs in later breeding.
“Good bottom, good water is good for crabs.” The criteria for a good bottom are less drug residue, transparent bottom mud, and high oxygen content. After nearly 5 years of practical experience in pond mouth use, it has been found that solid hydrogen peroxide can not only treat drug residues, but also make the sediment more transparent and non-solid. It also increases the oxygen content in the sediment and activates the sediment in the sediment. Probiotics, through the dual effects of chemistry and biology, can better chemically degrade and biodegrade drug residues and organic matter at the bottom, reducing costs and preventing the residue of secondary pollutants.