Japanese knotweed is a very strong invasive plant, why hasn t it caused much of an impact in China?

The ecosystem of each place is unique, because it takes many years of evolution for each species to restrain and help each other, and the term invasive species must be familiar to everyone, right? If a species is to survive in a different place, it may become unadaptable and will not be able to survive.

Because China has a creature that restrains the growth of Japanese knotweed, other countries have failed to introduce this species because they do not have psyllids, which can suck its sap and thus control the number of knotweed.

Because we Chinese eat more, like some of these plants that bother foreigners, they have become gourmet in China and are eaten by us in large quantities, so it will not cause a great impact.

Because China's geographical environment is not suitable for the growth of this plant, and China has done a large-scale investigation and treatment.

When Japanese knotweed invades the ecosystems of other countries, it will spread on a large scale. But this plant is also found in our ecosphere. It is not an invasive alien species.

Because China has made this plant into a medicinal herb, knotweed is a very useful thing in China, so the impact on China's ecological environment is not particularly large.

The impact on China is not very large, because the cultivation of this plant is very profitable, and it has natural enemies in China, so it will not overflow.

Because there are natural enemies of this plant in China, there is no fear of its biological overflow.

Japanese knotweed is a knotweed native to Japan, from the appearance, it is outstanding, the leaves are full and round, shaped like a heart, his stem has red spots, shaped like bamboo, although it looks stout, but the inside is empty, after flowering, small white flowers will grow on the top of the stem, but such a beautiful plant is listed by the International Union for Conservation of Nature as one of the 100 most dangerous invasive species in the world, why is this?

In 1847, the Dutch Agricultural and Horticultural Association named Japanese knotweed the most interesting and novel ornamental plant of the year, and in 1850, a group of British gardening enthusiasts excitedly arranged a ship to welcome Japanese knotweed from Japan to England, but what they did not expect was that this plant would spread across Europe and become their nightmare with its tenacious vitality and reproductive ability.

Because of the huge root system of knotweed, in the soft soil of the United Kingdom, its rhizome can extend to more than three meters deep underground, horizontally to more than seven meters long, and the growth is fierce, it can grow to more than one meter tall in less than a month, and some can even grow to more than three meters tall. Not only does it crowd out the surrounding plants and bring disaster to the ecosystem, but if the rhizomes are not cleared underground, they will redraw nutrients and water from the soil, and over time they will break through the soil again.

In addition, it is extremely penetrating, able to drill out of cement slabs or brick joints, and relies on its strong root system to prop up cracks, causing damage to buildings, roads, embankments and other buildings. For this reason, the London Olympic Stadium spent 70 million pounds, or about 6.3 billion yuan, before construction began, to remove the Japanese knotweed around the stadium for fear that they would cause trouble.

What's more, Japanese knotweed has a strong reproductive ability, combining both asexual and sexual reproduction methods, and can reproduce itself without even seeds, relying on rhizomes, and is one of the largest groups of cloned organisms in the world that humans have discovered so far. But the strange thing is that there is also knotweed in our country, but in our country, knotweed has no chance to flood at all, and even, we still plant it in large quantities, what is the reason for this?

The reason why knotweed is not widespread in our country is that there are two creatures in our country that are the nemesis of knotweed, namely psyllids and aphids, which will continue to suck the nutrients of knotweed, so that its growth and reproduction ability are greatly reduced, so as to control the number of knotweed plants within a reasonable range.

Knotweed is still a traditional Chinese medicine in our country, with the effects of invigorating blood, dispersing stasis, passing menstruation, suppressing cough, clearing heat and detoxifying, in addition to having a certain pharmacological effect, it also has the performance of dyes, and its young stem is also a unique flavor of wild vegetables, whether it is eaten raw or made into a dish, the taste is not bad, so our country will specialize in planting knotweed.

A place with a humid and warm climate is inherently suitable for the rapid growth of plants. But not here.

Not only can it not grow too fast, but the young leaves are fed to the animals, the small ones can be cooked, and the elders can be used as traditional Chinese medicine to eat, and there is no waste at all.

In the south, camphor trees, coral trees, heather, etc., do not lose their leaves at all in winter. And knotweed is going to wither in winter, and if you miss a winter, what will you do to compete with the woody plants of the south.

Because this plant is still very useful in our country, the plant can be found more than two meters tall after maturity, and it has medicinal value, so it is planted in large quantities in our country.

That's because this plant is relatively good for our country, and our country has a huge population, and these plants can be used as food.

This is because the cultivation of this plant can promote ecological balance, and this plant can be used as an ointment, which can achieve a particularly strong medicinal effect.

Knotweed belongs to the kingdom Planta—Angiosperms—True dicots—Caryophyllus—Polygonaceae—Polygonaceae—Genus—Knotweed. It was originally produced mainly in East Asia, mainly in Japan, the Korean Peninsula, and parts of China (Jiangsu, Jiangxi, Taiwan, Shandong, Sichuan, etc.). It can grow anywhere in a short period of time and is a perfect ornamental plant, which is why Japanese knotweed is very popular among the staff at Kew Gardens.

Kew Gardens was so influential at the time that Japanese knotweed was planted in other botanical gardens in Europe and began its journey to England. The British ** were destroyed, and the Japanese did not know that a small plant could do what they had always dreamed of.

<>In other words, there were no Japanese knotweed in Europe and the United States initially. So how did Japanese knotweed get into Europe and the United States? Knotweed, aliases many, has big insect stems, old Jundan, and bitter rod roots.

Native to Japan, it is a perennial herb with strong roots and watery stems. Its structure resembles bamboo and can grow up to 2 meters. Knotweed prefers to grow in warm, moist environments and has a strong ability to survive.

It is mainly found in Hokkaido, Japan, the Korean Peninsula, and Shandong, Sichuan, and Taiwan in China.

** £70 million spent cleaning up knotweed in the area where the main venue of the 2012 Olympics was located. Later, after a long period of contact, the British discovered that knotweed has many advantages, not only for ornamental and medicinal purposes, but also for windbreak and sand fixation; Cattle, sheep, and other livestock can be eaten, even by people. Because of these advantages, the British completely fell in love with knotweed, which spread widely in the UK.

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Because this plant is suitable for the soil of our country, planting can protect the biological chain and promote the development of the natural environment, so our country is planting.

Because this plant has high medicinal value in our country, it can clear away heat and detoxify, and can also invigorate blood and pass menstruation, so it is all regarded as medicinal materials.

It is because our country will eat this plant, and will use this plant to feed cattle and sheep, and often pick this plant, so that the number of plants is reduced.

Knotweed is a plant in China's ecosphere and a good traditional Chinese medicine. However, if you enter the British ecosystem, due to the lack of natural predators, it will multiply in large numbers and cause disaster.

Because this kind of thing has an ingredient that is very useful for ** injuries and diseases, so our country will grow it on a large scale.

Because this plant has a very good growth environment in the UK, and in our country this plant has some natural enemies, so it will be propagated by planting.

Japanese knotweed is a weed of the knotweed family native to Japan, which was introduced to the United Kingdom as an ornamental plant in the 50s of the 19th century.

Japanese knotweed is not afraid of water, and the broken leaves can float downstream down rivers or streams to continue growing, and must be uprooted and burned to prevent spread. The natural predator of Japanese knotweed is the aphalaraitadori, a sap-sucking insect that lives in Japan.

Japanese knotweed is also called knotweed in China.

Knotweed (scientific name: Reynoutria japonica Houtt.).）：

Polygonaceae, Polygonum cuspidae is a perennial herbaceous plant. The rhizome is stout, the stem is erect, up to 2 meters high, hollow, the leaves are broadly ovate or ovate-oval, flowering in August-September and fruiting in September-October.

It is produced in southern Shaanxi, southern Gansu, East China, Central China, South China, Sichuan, Yunnan and Guizhou, China; Yongshan, Weixin, Zhaotong, Ashan, Xichou, Pingbian, Jinpingdi; Shrubs, valleys, roadsides, and fieldside wetlands are born on mountain slopes, at an altitude of 140-2000 meters. North Korea and Japan also have them.

Growth Habits:

It likes warm and humid climate, and the soil requirements are not very strict, and low-lying and waterlogged land cannot grow normally. The root system is very developed, drought tolerance and cold tolerance are strong, the stem grows rapidly after returning to the green model brother, and begins to branch when it grows to a certain height, and the leaves follow, and basically reaches the height of the annual Dan Ming before flowering.

Knotweed propagation is one with seeds, the other is with rhizomes, and the production is mostly propagated with rhizomes with roots and buds, which is characterized by easy access to materials, easy to survive transplanting, and quick results; However, seed propagation is not only slow, but also due to the low germination rate of seeds and the low reproduction coefficient, most of them are not used, and rhizome propagation is generally used.

The above content reference: Encyclopedia - Knotweed.

If it is so invasive, China and Japan are so close to each other, it will definitely be invaded, but why didn't it cause great harm in China, I know that knotweed is a medicinal herb, but this thing can't be eaten as food. The land of the United States and Britain is particularly suitable for the survival of knotweed, the climate is warm, the vegetation is mostly grass, the soil is deep, the general grass can not compete with knotweed, knotweed grows every year, so knotweed is flooding. In China, the geology is complex, all kinds of soils, acidic and alkaline, there are many stones in the soil, the mountains are densely forested, and the grass root system can be developed to rush to flood.

In China, the geology is complex, all kinds of soils, acidic and alkaline, there are many stones in the soil, dense forests in the mountains, and the roots of the grass can be robbed of trees.

There are not many places in China that are suitable for the large-scale growth of knotweed, the south is mountainous, that is, it survives in the cracks of stones, and the plains in the north have been highly developed into farmland, and various herbicides do not live long. Although China is large, there are not many places where the soil is deep, and the plains have been developed into farmland, so to put it simply, there is no room for knotweed to grow on a large scale. Another very important reason for the invasion of knotweed in the United States and Britain is that every family likes to grow lawns, how can that pampered grass be the opponent of knotweed?

It is also their habit to invade their homes, and if they plant vegetable gardens and apply herbicides, there will be no invasion of knotweed.

Japanese knotweed is native to China, but the British first discovered it in Japan, so it was given such a nonsense name. The young stems of knotweed are edible, and the roots are a relatively expensive Chinese medicinal material. The wild want to flood.

Because knotweed is a traditional Chinese medicine in China, the Chinese use the plant for medical purposes, while Japan is invaded.

Because China has stronger plants that have a suppressive effect on Japanese knotweed.

Because it seems that China has just the possibility to restrain its existence.

In China, the geology is complex, all kinds of soils, acidic and alkaline, and there are many stones in the soil, so the growth environment is not good.

I think it's because it's a natural enemy in China, so there's no way to develop.

Because of the complex geological conditions of our country, it cannot compete with other plants.

Because our country has carried out strict scrutiny of imported human goods, it will not allow him to enter our country easily.

In China, knotweed is a kind of Chinese herbal medicine commonly used in clinical practice, produced in most parts of China, also known as Yin and Yang lotus, bitter cane, acid cane, spotted cane, soil rhubarb, large-leaf snake general tube, etc., into the medicine began to be seen in the "Lei Gong Cannon Theory". Polygonum cuspidatum has a long history of medicinal use, with the effects of dispelling wind and dampness, dispersing stasis and fixing pain, relieving cough and reducing phlegm, mainly used for joint paralysis, damp heat jaundice, amenorrhea, symptomatic scabies, phlegm, water and fire burns, fall injuries, carbuncle swelling and sores poison, etc.

Knotweed is knotweed, regardless of China and Japan, it is the same plant, the roots can be used as medicine, and the market price is 30 yuan. Do you think local medicinal herbs can be a disaster? It's good not to be poached. You have to dig it quickly, don't cut off the roots.