But reality may not be as good as it looks。
It is true that fruit trees are often planted in the south as side trees。
In the provinces of guangxi, guangdong, fujian and hainan, fruit trees are often used as fruit-seeding plants in the greening of cities, most notably guangxi ning。
As early as the 1970s, nanning had set a greening approach to “let the fruit trees go to the streets”。
Nanning street in the 1980s. Source: fox search
Nanning was in the early stages of urbanization, with more bicycles than cars on the road, and the local gardening sector's demand for street trees was “both sighting and income”, and chose to plant four fruit trees, namely, tonsils, pineapple, mangoes, and human face fruit, on a large scale in the streets。
When the fruit tree matures, the gardening sector arranges for workers to harvest together。
That is to say, half a century ago, on the side of nanning's road, it was possible to reach out and pick a ripe mango and eat directly。
Later, the number of fruit trees in nanning grew more and more, in addition to the four above, there were walnuts, omelet mist, twigs, dragon eyes, twigs, pomegranates, peaches, sour dates, yellow skin, etc。
In quantitative terms, tonsils are an absolute advantage, with about 30,000 in nanning city alone. There are also about 6,000 mangoes and 1,000 pineapple。
After the rain, the tonsils fell on nanning road. Source: south morning
However, with the growth of urbanization, the dream of “free fruit” faded。
First, there has been an increase in the number of motor vehicles on the road, which, in the face of industrial exhausts, car tail gas and dust construction in the city, is headed by the tree of the walkway, and leaves have become darkened and fruit is dying under various fumes. I guess you can't take it anymore。
Besides, these green fruits are not good。
Greened mango meat is large, fibres are abundant and taste is sour; greened pineapple meat is small, tastes poor and acidity is high; greened pineapple mists are watery and tasteless。
Greening fruit also has heavy metal and pesticide residues, which may endanger human health。
The difference between green and food. Source: shenzhen
So, for fruit trees on the side of the road, eating fruit is not their business, but side trees。
As competent walkers, they are of ecological value in addition to their value. A strong troupe tree can play a role in maintaining the carbon balance, increasing air moisture and mitigating the urban “hot island effect” and improving the ecological environment。
Simply put, if the city is a dirty big fish tank, the walker tree is the scavenger inside。
But not all trees can be side trees。
The trees need to meet the following three conditions in order to become civil servants and be certified for employment. On the one hand, it is important to have a strong shade of the walker tree, and on the bright south it is important to protect the public; on the other hand, it is adaptive, resilient and infestable; and on the other hand, it is resistant to trim and low maintenance。
Fruit trees such as tonsils, pineapples and mangoes meet the above conditions。
These fruit branches are thick and have the effect of slowing down wind speeds and distilling dust, bringing the large dust carried in the air down to the ground. Some fruit leaves have rough, fuzzy surfaces, which absorb dust and harmful gases from the mucous glaze of the genre, and serve to purify the air。
They also absorb and block urban traffic noise。
If the mango leaf surface is wrinkled, the sound can be dispersed in different directions from different angles and can significantly reduce the straight-line transmission of noise。
Greening makes a significant contribution to urban ecology. Source: telecommunications network
However, fruit trees such as twigs and dragon eyes are not suitable for use as walk trees。
Because trees planted on both sides of the sidewalk generally require a net altitude (the lowest distance from the branch to the ground) between 2. 5 m and 3 m, with trees planted on both sides of the lane, and a net altitude between 3 m and 4. 5 m。
Vegetable trees, such as gills and dynasty eyes, are more cultivated in green areas and residential areas, owing to their lower trunks and larger branches。
In order to ensure a clean air, the lower branches must be trimmed. Source: hong kong development authority, tree management manual
However, one of the main disadvantages of fruit trees as side trees is that conservation is more problematic。
When the fruit matures, it falls naturally and rots, contaminating the road, creating a scent and attracting mosquitoes。
The fall of larger fruits, such as mangoes and pineapple, may pose a security risk to pedestrians, especially during the typhoon season of june and july。
"beware of the fall of mangoes" by the road in guangzhou. Image source: edit
In order to take care of the fruit trees by the roadside, the gardening and forestry sector has been very hard-working。
The fruits are smaller, and they usually wait for them to fall behind and be cleaned up in time. Prior to the typhoon, the garden sector also arranged for conservation workers to manually remove large fruits, while cutting dead branches, broken branches and insect branches. Pesticides are also regularly sprayed。
According to a press report, a sanitation worker in nanning complains that cleaning the fallen fruit is more difficult than cleaning the leaves, especially if it is crushed and sometimes needs to be cleaned by hand。
Conservation operators use high-altitude vehicles to remove pineapple. Source: nanning city park research institute
In fact, the fruit tree is no longer the main character of nanning road tree。
According to a 2011 study on the greening of the city of nanining, fruit-seeding plants account for only 12. 7 per cent of all greened wood, with only tonsils and mangoes applied to the strips and sidewalk trees。
Seeing it here, you might ask why the fruit trees on the side of the road can't be eaten, conserved and troubled
As in nanjing, beijing's silver apricot, walk trees are not just the custodians of urban ecology, but the cultural business cards of a city。
The mangoes, pineapple, peaches, yellow leather and other fruit trees are the country's species with a long history of cultivation. Guangzhou has a bay of kiryu, and guilin has yang mei peng, which are already an important part of urban culture。
Moreover, the landscape of fruit and branches on the side of the road is a characteristic view of the cities of the south, marking a rich and productive city。
If all the fruit trees on the side of the road were eradicated, cities would lose their identity and charm。
The mango tree by the road is an urban landscape. Source: southern metropolis
So, fruit trees are still growing, and it's not too bad not to eat。
For guangxi's fruits are cheap and rich. Go to the local farmers' market, and you'll find it's fruit paradise。
Mango 3 pounds, dragon eye 2 pounds, 30 pounds in beijing, twigs, twigs, and twigs, 5 pounds in guangxi。
So, the locals know what roadside mango it doesn't smell
