Application of quicklime in Monopterus Albus Culture

The chemical name of quicklime is calcium oxide (CaO), because it is cheap and rich in production. when dissolved in water, it will have a chemical reaction with water to produce a large number of alkaline substances (calcium hydroxide), which increases the PH value of water, thus inhibiting or killing bacteria. It is widely used in breeding.

In rice field eel culture, the general concentration is 25ppm (25 grams per cubic meter of water). The method used in eel ponds is to weigh the corresponding weight of quicklime, add it to the water (such as a plastic bucket containing water), stir it with a tool to fully dissolve it, leave it for a little while to clarify, and sprinkle the clear liquid on it.

It should be noted that the dosage of quicklime is relatively strict and can not be expanded arbitrarily, otherwise it may bring harm to the ricefield eel in the pond. Pan Jianlin and Professor Xu Zaikuan of Jiangsu Freshwater Research Institute conducted experiments on this. The results were as follows: when Monopterus Albus was released into quicklime water with 50ppm concentration, the Monopterus Albus immediately became restless and rushed to the water surface, a phenomenon that lasted until death. There are more flocs in the experimental water, which is the product of the interaction between the surface mucus of ricefield eel and quicklime. All dead ricefield eels secrete a large amount of mucus, red and swollen anus, patchy or massive erythema in the neck, hyperemia in the head, congestion in the parotid cavity and blood clots filled with blood clots. Changing into clean water for about 2 hours can not stop the death. In the experimental group with slightly lower concentration of quicklime, the mortality of Monopterus Albus decreased significantly within 5 hours and 24 hours, but the cumulative mortality increased with the extension of time. In the experimental group treated with 50ppm concentration, the mortality rate reached 100% in 7 days. Therefore, when using quicklime as a disinfection drug, the amount of water must be accurately calculated and weighed accurately, and its maximum concentration should not exceed 30ppm. After using quicklime to disinfect the pond or eel pond, the medicine must be fully eliminated before it can be used, otherwise it will affect the survival rate of Monopterus Albus.

High-quality quicklime is lump, dissolving in water will give off a lot of heat, if the amount of water is less, the water will boil, at the same time all dissolved in water, with little or no impurities. Some students buy hydrated lime (which has reacted with water and is in the form of powder). After entering the water, it is no longer hot. The disinfection effect of this kind of lime is not good, so it is recommended not to use it.

Students who can not buy reliable quicklime locally can use "Eel Bao No. 2" provided by our company instead. Although the cost is a little higher, the efficacy is more stable and the use is safer. The general dosage is 2 ml for every 1 cubic meter of water.