Commonly used pond cleaning drugs and their effects
Medicine cleaning pond is to use drugs to kill all kinds of ferocious fish, wild miscellaneous fish and other enemy organisms that endanger fish, shrimp and crab seedlings in the pond, so as to create a safe environmental condition for seedling breeding, which is an important measure to improve the survival rate of fish, shrimp and crab seedlings. The commonly used pond cleaning drugs and their effects are introduced as follows:
1. Quicklime pond cleaning and its effect: the function of quicklime pond cleaning is that quicklime reacts with water to produce calcium hydroxide and release a large amount of heat energy. Calcium hydroxide is a strong alkali, and its hydroxide ion can increase the pH value of pool water to more than 11 in a short time. To kill wild fish and other enemies.
Method and effect of pond cleaning: after the ① dry pond water is drained, the remaining water is about 10cm, using 60-75 kg of quicklime per mu and 50-60 kg per mu of ponds with less silt. ② with water to clear the pond without draining the pond, the amount of quicklime is 125-150 kg per mu with an average water depth of 1 meter. It can kill wild miscellaneous fish, frog eggs, tadpoles, shrimp, crabs, aquatic insects, parasites, pathogenic bacteria and some aquatic plants with shallow roots and soft stems, keep the pond water slightly alkaline and increase the fertility of the water.
- Prev
Guan male crab
Common name: Pingjia crab origin and delivery period: Guan Gong crab is a kind of small crab that lives in shallow muddy and sandy sea floor and camp benthic life. Introduction: crabs living in the ocean are quite prosperous in the crab family. They not only have a wide variety of species, but also have different skills. There are sand crabs that walk like flying sand crabs, hermit crabs that don't pay rent, coconut crabs that can climb trees, and tall crabs that crawl at the bottom of the sea with long legs that are more than one meter long. Among the many sea crabs, the strangest and most
- Next
How to raise a long-lived turtle
Guide: many people want to raise turtles, because they all think that turtles are fun, strong vitality, quiet, and need a small place, but few of them are well fed. They are all bought and raised according to the method said by pet traders, but they died soon after. So how to raise a long-lived turtle. 1. the healthy tortoise toenail is hard and intact, the body is thick and bright light green, the eyes are bright and open, the nostrils circulate cleanly, the back of the head and limbs can stretch freely, they will compete for bait, and some will climb to rest on other tortoise shells. In short, choose
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?