Known as "the tree without children", is eucalyptus really poisonous? Why is Guangxi still planting?
Release time：2023-03-23 18:41:06 source：korpimaankyynel.com author：Shao Mo environment
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Known as "the tree without children", is eucalyptus really poisonous? Why is Guangxi still planting?
Why do koalas slack all day long? Because it eats eucalyptus leaves. In fact, this answer is wrong. The slow movement of koalas is not determined by eating eucalyptus leaves, but by its own natural ecological niche. The koala that eats eucalyptus leaves is a saying in many parts of our country that the eucalyptus tree is a tree that "destroys its descendants", and no other trees can be planted on the land where it has been planted. So, what makes eucalyptus everyone shout? Is it poisonous? A Eucalyptus Forest
Amazing Eucalyptus
We all know that Australia is the kingdom of eucalyptus, which is basically the world of eucalyptus. In fact, in addition to Australia, the neighboring Papua New Guinea also has the distribution of eucalyptus, and the distribution of eucalyptus is limited to this area. Eucalyptus is located in the Eucalyptus genus of the Myrtaceae family. Despite its strange name, this Myrtaceae family is actually a large plant group. There are also 9 genera and 90 species in my country. For example, the familiar guava, myrtle, etc. are also members of this family. Eucalyptus in Australia When mentioning eucalyptus, we have to mention a very famous animal - koala, whose status in Australia is similar to that of pandas in my country. There has been such a misunderstanding for a long time, that is, the koala looks cute and cute, but it is actually poisoned. Why is it poisoned? Because Australia basically only has eucalyptus trees, they eat eucalyptus leaves, which are poisonous, so they get poisoned. Actually, this statement is wrong! The koala is cute because it is very dumb. Its ecological niche is similar to that of the sloth in South America. It is a slow-moving herbivore and does not need to move like a rabbit. So, koala's stay, don't throw the pot to the eucalyptus. Kara is not poisoned by eating eucalyptus leaves. In fact, eucalyptus leaves are not poisonous, but it's hard to eat. It's true. Eucalyptus leaves contain condensed tannins, which are found in many foods and are the main source of sour taste. Therefore, the taste of eucalyptus leaves is actually sour and astringent. Herbivorous animals also have to be picky about their taste. They will not force themselves if it is so unpalatable. Koalas are too weak to beat other animals and are forced to eat eucalyptus leaves. Koalas eat eucalyptus leaves because they cannot grab other animals and because eucalyptus leaves have more cellulose and are rough. In order to digest fiber, koalas consume their own energy, and in order to save energy, they reduce their activities. After a long time, the koala dumped all his waste on the poisonous eucalyptus leaves. The substance secreted by eucalyptus is similar to rubber. When it encounters carbon dioxide, it will generate ozone. This is indeed a bit poisonous, but ozone is easily decomposed and will disappear soon. Unless you keep people and eucalyptus in a very confined space and smell eucalyptus every day, it is still very difficult to be poisoned by a eucalyptus tree. Eucalyptus leaves are not poisonousIntroduced eucalyptus
The hometown of eucalyptus is Australia. What about eucalyptus? This is because eucalyptus has 3 very outstanding advantages that make it an economical plant. First of all, eucalyptus is a good wood with its straight trunk and hard texture. Secondly, eucalyptus grows very fast, it can grow 3 cm a day during the growth period, and under natural conditions, it can become a tree in 5 years. Later, the eucalyptus tree was improved, and a new variety of eucalyptus was obtained, which grew 30% faster than ordinary eucalyptus. The last of the fast-growing eucalyptus forests is that the eucalyptus has a strong adaptability, whether it is dry or wet, it can grow and is evergreen. Therefore, there are many fast-growing eucalyptus forests in the southern region, and they even once replaced the native tree species and became the largest plantation forest. The role of eucalyptus is very large. Its wood is solid and can be used as furniture, and it can be used as virgin paper with high yield. According to data from the State Forestry Administration, as of 2018, my country's eucalyptus planted area was 5.46 million hectares. However, eucalyptus brings economic benefits as well as disasters. The towering eucalyptusEucalyptus disaster
I don't know when it started. The southwest region, which has always been known for its rain, encountered a severe drought. In 2010, the southwest The five provinces suffered successive droughts, one more severe than the other. At this time, some forestry experts proposed to cut down the eucalyptus quickly! Is there any connection between eucalyptus and this drought? Eucalyptus is a tree that lives in the Australian outback. Due to the influence of the Great Dividing Range, the Australian outback and the Australian coast are simply two different things. The inland is dry and rainy, and it belongs to a mixture of African grasslands and Sahara. In such an environment, eucalyptus can grow and become the leader of Australia. There are several brushes. Southwest drought According to fossil records, Australia once had other tree species, but most of them were extinct, and only eucalyptus had the last laugh. Farmers who plant eucalyptus in my country also say that eucalyptus is a particularly domineering tree. After planting it, don’t think about planting other big trees within a few kilometers, and even if it is cut down and other trees are planted on the original ground, it will not survive. At first people thought that eucalyptus was poisonous and polluted the land, but it has been proved that eucalyptus is not poisonous, so why can it drive other tree species to the end? The reason is that eucalyptus is so absorbent, its roots can penetrate deep into the soil, absorb nitrogen, phosphorus and potassium below two meters, and also absorb groundwater. The land where dense eucalyptus trees have been planted will become very barren and will take several years to recover. If other trees of eucalyptus species are cut down, most of them will be malnourished. You see, next to the eucalyptus trees in Australia, there are basically low shrubs and small grasses, which live on the nutrients and water that the eucalyptus trees suck up. In addition, eucalyptus absorbs too much water, causing severe soil water loss, which reduces transpiration from the land. Transpiration is a part of the natural water cycle. There is a lot of precipitation in the south. On the one hand, it is the humidity brought by the monsoon. Nature's water cycle Eucalyptus alters soil water content, which in turn alters transpiration, disrupting the water cycle in the Southwest where it is grown, leading to a drop in precipitation. Eucalyptus has been planted in my country since 1950. It was promoted nationwide in 1980. The southern region has always been the base camp for planting eucalyptus because of sufficient water. Planting over many years eventually caused the eucalyptus to drain the soil in the Southwest, causing drought. After the severe drought, the southwestern region planned to reduce the eucalyptus planting area, but it is a part of the economy. The decrease in the southwestern region has to be made up in some areas, and Guangxi has become a new eucalyptus planting area. Then some people will ask, is Guangxi not afraid of being sucked up by eucalyptus? The Eucalyptus Forest in GuangxiEucalyptus in Guangxi
Guangxi's eucalyptus plantation area ranks first in the country, and it is also the first province in my country to plant eucalyptus trees. In 1890, the first eucalyptus tree landed in Guangxi. Guangxi is very suitable for planting trees. It has more mountains and less land, and the forest coverage rate has reached 62.37% (2020), covering an area of 223 million mu. Among them, the natural forest area is 87 million mu, the artificial forest area is 136 million mu, and the eucalyptus forest area is 32 million mu. Why does the southwest region dare not plant eucalyptus trees on a large scale, Guangxi can still lead the country's eucalyptus production, and even Guangxi will plant more eucalyptus trees in the future to meet the needs of my country's eucalyptus wood. The reason for the scenery in Guangxi is that there is more water in Guangxi than in the southwest! First of all, Guangxi belongs to the subtropical and tropical monsoon regions, with an annual precipitation of more than 1500 mm, while most of the southwest region is subtropical, with a precipitation of about 800 to 1000 mm. Secondly, the coastal area of Guangxi will be affected by the Beibu Gulf and the South China Sea monsoon, which will bring abundant moisture. The above two points can make Guangxi regain its vitality immediately after being sucked by eucalyptus, and put it into the next round of planting. In addition to being very aggressive in absorbing water, eucalyptus has basically no major shortcomings. After all, it also photosynthesizes and produces oxygen. Eucalyptus saplings thrive planting it to both harvest wood and improve air quality. However, do not plant eucalyptus blindly, it is an alien species no matter what, and there is nothing to restrain it in our country. Therefore, planting eucalyptus as an economical timber forest needs to be adapted to local conditions. Eucalyptus requires a lot of water, and naturally it cannot be planted because of low precipitation. Furthermore, the eucalyptus forests should be planted in different areas, not piled up in a large area, otherwise no amount of groundwater can withstand such suction, and in the end there will really be no drop. Eucalyptus is not so heinous. It is neither poisonous nor will other trees "cut off their descendants". It is only because people did not plan well in advance, so that the local environment could not bear the weight of eucalyptus, and the results appeared later. After all, the eucalyptus tree was cut down and the eucalyptus tree took on all the infamy, and only the eucalyptus tree was injured in the world.- Last：Lei Diansheng's Ten Years Walking in China Route Map
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