But in 2003, China suddenly announced that water hyacinth was listed as the first batch of 16 alien invasive species. What is the reason? Since then, we can say that it is difficult to see the trail of water hyacinth, even in many areas. What's the situation? Let's take a look at this plant.
Water hyacinth can be seen in most parts of China.
As we also said above, in 1930s, after the water hyacinth was introduced into China as an ornamental plant, it was planted on a large scale, and soon spread to 19 provinces and cities. Moreover, during the planting, we also found some utilization values of water hyacinth, so this is one of the reasons why it can be quickly popularized in China. We can use water hyacinth to purify water, return it to the fields, and also make pig feed, so it is very popular with everyone.
At the same time, the reproductive capacity of this plant is extremely strong, which is several times that of ordinary plants, and the growth area can be doubled within 6 days. So you can say how much you want. But slowly, we found that water hyacinth does have a lot of value, but its nutritional value is low. Even as pig feed, fertilizer still can't achieve the ideal effect. However, if harmful substances can be effectively absorbed without rapid treatment, it is more likely to cause serious decay, so it becomes more polluted. Then the idea of turning waste into treasure of water hyacinth is completely wrong, so its use value is far lower than the harm caused.
Therefore, in 2003, China listed this plant as an alien invasive plant, which needs to be carved out quickly, otherwise the ecological environment will become worse. No, the popularity of water hyacinth in China will slowly start to slow down. At the same time, water hyacinth has also become one of the top ten malignant invasive weeds in the world, because other countries in the world have also encountered the same situation.
Where is the harm of water hyacinth?
As mentioned above, secondary pollution is the most serious. Because water hyacinth grows very fast, if we humans don't deal with it quickly, it will rot in the water quickly and it is difficult to control. At the same time, its reproductive ability is super strong, and we can't protect other crops, so the harm comes. If the farmland cannot be treated, it will affect the growth of crops.
Secondly, if the area of water hyacinth is too large, the water quality of farmland can not be guaranteed, and the water body receives insufficient sunlight every day, which will make the water problem more serious.
In addition, when water hyacinth grows, it not only absorbs harmful substances in water, but also absorbs natural compounds in water, which will also have an impact on the growth of crops. In the end, it will destroy the diversity of aquatic animals and plants, so the harm far exceeds the value and directly leads to the inability to grow.
Why did it disappear cleanly, and now it's gone?
It is true that the water hyacinth is basically invisible now, and it has disappeared cleanly. It is because after being listed as an invasive species, we adopted an efficient comprehensive management method for water hyacinth, and four methods, namely physical control, chemical control, biological control and comprehensive management, became the main ones. Secondly, most of them are artificially salvaged, which directly leads to the inability to survive forever. So it is difficult to see water hyacinth in rivers now, and human beings have been completely eliminated.
Judging from the existing situation, water hyacinth may be the best choice to control alien invasive plants. Water hyacinth has completely disappeared since it was popular in China. It won't take long at all. It's all thanks to everyone. Of course, it may also be related to the ecological environment. The pools that we used to see everywhere are gone now, and many paddy fields have become dry fields, so even if there are water hyacinths, there is no way to survive, so this is some natural methods to deal with water hyacinths, which is the basic situation of water hyacinths.
Of course, the most important thing is that China has made great efforts in the prevention and control of water hyacinth, which has changed the water quality and thus reversed the growth of water hyacinth. Without the foundation of survival, it is the ability to survive. Therefore, it is difficult for us to see the figure of water hyacinth now, and it basically disappears cleanly.