Hair vegetable is a precious ingredient, delicious taste, and has been banned from mining and sales by the state, in 1999 was included in the list of national key protected plants in China, the highest level of protection level.
But in a strict sense, hair vegetables are not a plant, and they are not endangered, so why should hair vegetables be included in the national first-level protected plants?
<h1 class="pgc-h-arrow-right" > hair dish</h1>
Hair vegetables, scientific name hair candidal algae, is a kind of algae of the order Cyanobacteria, because it is very slender from the morphological point of view, less than 1 mm in diameter, when gathered into a clump, the diameter can reach about 0.5 meters, and the color is dark.
In its natural state, it is brown, and after drying, it appears black, which is similar to the shape of human hair, so people figuratively call it "hair dish", commonly known as ground hair vegetable, dragon's whiskers, hair algae and so on.
It is widely distributed in deserts and barren soils around the world, and is mainly distributed in Gansu, Qinghai, Ningxia, Shaanxi, Hebei, Inner Mongolia and other places in China, and is a unique algae plant in grassland and sandy land in arid and semi-arid areas.
What is the definition of a plant > <h1 class="pgc-h-arrow-right"? </h1>
I believe that many people are confused about this concept, this is not what you think looks like grass and grows in the soil can be called plants. The classification of organisms is a complex issue.
According to the current taxonomic method, people divide all the organisms in the world into 6 major realms, namely the virus kingdom, the prokaryote world, the eukaryotic protist world, the fungal kingdom, the plant kingdom and the animal kingdom.
Among them, plants have a clear scientific definition, which is defined as: it must be a multicellular eukaryote and have a cell wall; most contain chloroplasts or contain chlorophyll, which can be photosynthetic; and as a producer, it can be self-nourishing, that is, self-producing nutrients.
<h1 class="pgc-h-arrow-right" > hair vegetable is not a plant, but a fungus. </h1>
First of all, hair vegetables are essentially a blue-green fungus belonging to the candida family Candidae, although named algae, but actually bacteria, in the early stage of biological development, because people did not realize that cyanobacteria are bacteria, so it was named "algae".
Hair vegetables are bacteria, no different from mushrooms, we can think of the algae form of bacteria is their move towards multicellularization, but subject to the complexity of cells, cyanobacteria generally first use filaments to form a candy, and then form a common colloid by secreting polysaccharides, and finally form a simple morphological structure.
If you look closely, it is not difficult to find that one of the most obvious differences between algae bacteria and plants is that there is no differentiated tissue and organ. Secondly, because there is no mitochondria and corresponding organelles, it does not have chloroplasts.
However, hair vegetables can be photosynthesized, but not through chloroplasts, but in vegetative cells that appear green.
<h1 class="pgc-h-arrow-right" > why can hair vegetables be listed as a national first-class protected plant? </h1>
Hair vegetables not only taste good, but also rich in nutrients, but hair vegetables also have a more important role - to protect the ecological environment. Because of the fact that Fa Cai, taking the harmonic pronunciation of "fà" (fà) and writing it as "Fa Cai", has a potential meaning of "Fat Cai", coupled with its delicious taste, it has become a famous dish in Cantonese cuisine.
However, the wild resources of hair vegetables are scarce, and it is more difficult to mine, coupled with the cost of long-distance transportation, so the price of hair vegetables has risen again and again, so many people have gone to the northwest to excavate hair vegetables, setting off a climax in the northwest desert.
However, many people at that time were driven by interests, and did not realize that hair vegetables are algae plants, filamentous bodies in the special-shaped cells have nitrogen fixation, can absorb nitrogen in the air, synthesize amino acids, can provide natural nitrogen fertilizer for the soil, and high temperature, cold and drought ability is very strong, the desert can play a role in wind and sand fixation, so hair vegetables for the protection of soil vegetation, improve soil quality, reduce soil erosion, etc. have an important role, with efficient ecological protection benefits.
However, the growth of hair vegetables is slow, only 6% a year, it is not easy to collect, excessive excavation can easily cause serious environmental problems, such as investigation and research found that every 2 double hair vegetables mined are equivalent to destroying the grassland of 16 football fields, and even some people think that the mining of hair vegetables is one of the main causes of sandstorms in China.
Based on the protection of the ecological environment, in the "Directory of Wild Plants under National Key Protection (First Batch)" promulgated by the State Council on August 4, 1999, Fa Cai was listed in the National Level I Key Protection.
As for why we should include hair vegetables in the plant protection list, it is because from the current scope of our protection objects, there is no careful category of organisms other than plants and animals, so out of people's traditional understanding, hair vegetables are included in the list of plant protection.