As an important part of China's agriculture, fisheries have always inherited and carried forward the Chinese farming civilization. The wisdom crystallization and empirical technology of the ancients have also been influencing our current fishery production.
For example, some of the fish we raise now use the names given by the ancients, such as carp, grass carp, silver carp, catfish, mandarin fish, etc., these names are still used as scientific names. For another example, the ancients' fish farming techniques also have an impact on the present, and works such as the Book of Fish Farming, the Qi Min Zhi Shu, and the Complete Book of Agricultural Administration summarize and explain the construction of fish ponds, the methods of obtaining fish fry, the number of polycultures, and feeding. Our current fish farming technology is also constantly improved and innovated in the experience and technology of the ancients.
Xu Guangqi, a famous scientist and politician of the Ming Dynasty, said in the book "Complete Book of Agricultural Politics": "The pond is thin and hurts the fish, making lice." Take the mud, quickly plant the grass, and put the water into the fish. Fish lice are as big as small beans and resemble clumps of fish. Where the rainstorm in the mountains enters the pool, with evil insects and snakes, and also makes fish lice, it is extremely thin. Whoever takes a fish and sees that the fish is thin, it is advisable to examine it carefully. Some are filled with pine hairs all over the pool, and those that float are divided. "
Meaning: Lean water ponds are prone to injuring fish, making fish grow lice. When it rains, the torrential rain washes the evil insect snake qi in the mountain into the pond, and it is also easy to make the fish grow lice. Fish lice body is emaciated, when fishing, if you find that the fish is thin, you must check it well. When fish lice were found, they were laid in the fish pond with pine leaves, and when they were observed floating on the fish pond, they were removed.
Fish lice, with the word "lice", are easily reminiscent of lice on people or other animals. I can say that I am extremely afraid of lice, and every time I think of this name, or see a picture, I can't help but shiver, and I feel like the hairs on my body start from my calves to my neck and stand up at once. Fish lice are a fish parasite in aquaculture that is most likely to occur in the spring. Xu Guangqi also said that skinny ponds are also prone to occur. Xu Guangqi also described that fish lice are as big as small beans and like clump fish. The dough fish is the turtle, which is also in line with the description of the fish lice.
After the fish parasitizes the fish lice, at first the fish will be restless and swim back and forth, because the fish lice climb on the body. The fish then begin to stop eating, exercise weakness, and can obviously find that the fish is emaciated, which may cause other fish diseases. Fish lice are harmful to fry and fingerlings because it affects the feeding and movement of fry, which can easily lead to fry death.
My fish friend once encountered a fish parasitizing fish lice. His fish did not eat and did not move, please help me to see, we caught a few fish to check, the naked eye can clearly see the fish lice on the body of the fish, and there are already many. Before this, although I knew about fish lice, I had not yet encountered fish lice that caused fish diseases, and I was uncertain about the treatment. Later, I called an old fish farmer, and he told me that the treatment of this disease is simple, with pine leaves, and it will not be there for a few days, which is a very useful thousand-year secret method.
I asked about the method again, he said, use the masson pine on the mountain, take the part with young pine leaves, fold the branches, bundle into small bundles, use 15-18 kg per acre into the pool, about 5 days to see the effect, remove the fish lice and fish out the pine branches. We followed his method, it did have an effect, put in the pine branch for a week and then check the fish body, there are no fish lice.
It can be seen that Xu Guangqi's use of pine leaves to remove fish lice is really effective and a summary of scientific production practice. Just to make it easier to catch the pine branches, we changed to bundle them into the pine branches. Later, I also heard other fish farmers say that you can also mash pine leaves into a whole pool of sap, and the effect is also very good.
Since ancient times, China has relied on traditional Chinese medicine to treat diseases and save people, and in the process of the development of Traditional Chinese medicine culture, the treatment of farmed animals also relies on traditional Chinese medicine. Pine needles are actually also a traditional Chinese medicine, which can be used in people to treat high blood pressure and high blood lipids, and can be used in fish to kill bacteria and insects. This is the crystallization of the wisdom of Chinese civilization. Now, many fish diseases are also treated with traditional Chinese medicine, which not only has a good effect, but is also green and natural. For example, the use of three yellow powder to treat fish enteritis, the use of garlic to treat enteritis and gills and so on.
As farmers and aquatic people, we should carry forward these traditional civilizations, promote the green development of aquaculture, and create a green economy for ourselves.