Nagqu, the highest city in China, why can't you see a tree in the urban area? 100,000 rewards for planting and living a tree?

In Nagqu, the city with the highest altitude in China, if you plant a tree alive, you can get a reward of 100,000 yuan. Is this true or false? There is no tree in Naqu City, what is the reason?

Urban greening is inseparable from trees. For the plain and hilly areas in central and eastern China, dense boulevards and rows of street trees are indispensable green landscapes in cities. Even in the arid northwest region, there are plants that are drought-resistant. green trees.

However, as a city on the Qinghai-Tibet Plateau, there is no tree in the urban area of ​​Nagqu. This is not because the local municipal administration does not want to plant trees for greening, but because it is difficult for trees to grow here.

It is said that if someone can relive a tree in Naqu, he will be rewarded with 100,000 yuan. No matter how credible the rumor is, it is enough to prove that planting a tree in Naqu is a difficult job.

If you look down at Nagqu city from a high altitude, you will find that apart from the wide streets and scattered Tibetan-style buildings that complement the modern city, there is indeed no tree to be seen, while the Nagqu River flows quietly beside the city, nourishing This plateau city, beyond the city is a patch of grasslands and towering snow-capped mountains.

Nagqu City is the youngest city in China. Nagqu was originally a county. In 2018, Nagqu officially became a prefecture-level city after adjustment. It has jurisdiction over 1 district and 10 counties, with a total area of ​​430,000 square kilometers, which is larger than Jiangsu, Zhejiang, Shanghai and Anhui. The area of ​​the postal district is even larger, the municipal government is located in Xeni District, and the construction of the city has been further increased. However, in this city with the highest altitude in China, even if the construction cost is high and difficult, it can still overcome many difficulties to build the city. Building facilities are required.

However, the idea of ​​planting trees has not been successful, and the main reason is because of the natural environment of Nagqu. Not only is Nagqu difficult to plant trees, but even the entire vast Qinghai-Tibet Plateau has few trees. , more of which are grassland-based.

In the city of Nagqu, the city with the highest altitude, a tree can be rewarded with 100,000 yuan. What is the reason why Nagqu cannot even support a tree?

As for the 100,000 yuan reward for tree planting in Nagqu City, although there are no clear regulations, it is almost impossible to plant trees in Nagqu City, and the local natural environment is difficult to cross the limit.

Nagqu is located in the central and eastern part of the Qinghai-Tibet Plateau, with an average altitude of more than 4,500 meters. It belongs to a veritable plateau area. The average annual temperature is only minus 2.2 degrees Celsius. However, it is different from the severe cold in Siberia, Russia and other arctic regions. The high altitude is cold, and it has the characteristics of an oxygen-deficient plateau. The air here is thin, and the oxygen content in the air is less than half of that in the plain area.

The growth of tall trees not only requires photosynthesis during the day, but also requires respiration at night. Respiration requires oxygen, while tall trees require a lot of oxygen, and it is difficult for the air to supply enough oxygen. Even if the trees are cultivated, it is naturally difficult to survive.

Therefore, Nagqu urban area cannot plant coniferous trees like the general frigid zone. The main reason is the high cold and hypoxia.

In addition, because of the alpine characteristics of Nagqu, a large area of ​​frozen soil layer is formed. These frozen soil layers will only thaw and become soft from June to August each year, and will freeze during the rest of the time. Such soil trees cannot be Survival, because tree roots cannot continue to grow and absorb nutrients even in the soil, so there are generally only grasslands on such soils.

Complementing the permafrost is that the precipitation here is mainly concentrated from May to September when the climate is warm, forming a sub-arctic monsoon semi-humid climate in the plateau, raining for half a year and drought for half a year. Although humans or animals can use rivers and save water to live, But trees have a hard time experiencing such droughts.

The windy weather in Nagqu has also become a difficulty for tree cultivation. After all, it is meaningless to cultivate a few saplings in the greenhouse. Once planted in the natural environment, the windy weather for more than 100 days a year may have long ago shattered the trees.

It is difficult to grow live trees in Nagqu, which is characterized by high cold, lack of oxygen and dry climate. Even if a tree is rewarded with 100,000 yuan, it will not help. So can Nagqu be able to plant trees?

At present, Nagqu City is also conducting research on planting trees, but the cultivated trees are all grown in greenhouses and are still in the experimental stage. And the cost is quite expensive. It is possible that the value of a tree has already exceeded 100,000 yuan, so no matter whether the rumors of raising a tree and rewarding 100,000 yuan are true or false, ordinary citizens generally do not take risks to lose money.

But there are exceptions to everything. In fact, Nagqu City doesn’t really have any trees. It’s just that there are no trees in most areas including the city’s Seni District. The reason is also because of the high cold, lack of oxygen and dryness, which cannot be suitable for tree growth. However, In the valley area of ​​Jiali County, such as County and Suo County, which is located in the east of Nagqu City, the above problems are avoided to a certain extent.

First of all, the terrain in the valley is low, which is conducive to the gathering of river water, and the environment is relatively humid and mild, so many trees in the cold zone, such as cypress, pine, fir, spruce, etc., also grow here.

But such special cases are rare after all. For plateau areas like Nagqu, patches of grassland and grassland are the most common vegetation here, but the grass on the grassland grows only 3-5 cm, and it is very easy to cause damage. Once the grasslands and grasslands are destroyed, it is easy to form the desert Gobi, so it is also very important to protect the fragile natural environment of the plateau.

However, I still hope that Nagqu can successfully plant trees, especially in important urban areas. If there are green trees, it must be the most beautiful green miracle on the plateau. Even if the current environment and technology cannot plant tall trees, Experiments can also be carried out from low shrubs. After all, other cities on the Qinghai-Tibet Plateau also have fruitful cases of planting shrubs.