Information**. On December 13, the warm winter sun sprinkled all over the place, and many citizens came to Longjian Road, Jinshan Street, Liangjiang New District to "check in". A while ago, several beautiful drone perspectives on the Internet were short**, which made the street tree French plane tree here quickly "popular" - overlooking from the air, on both sides of the winding road, neatly lined up plane trees, the leaves were brown and yellow, and occasionally a few leaves broke free from the trunk and slowly fell, like a "Maillard" color oil painting.
Maillard itself is a chemical reaction in which chemicals in food gradually form light and dark brown ingredients when heated, such as the process of grilling steak. Nowadays, it has become a popular color, and the color combination of earth yellow, coffee brown, and reddish brown is just similar to the overall tone of the colorful forest on the mountain city. When the cityscape is draped in a pop of colours, does it make your senses extremely comfortable?
Nature is a natural handicraft.
The "pigment" of the "Maillard" is that the temperature is on the warm side.
Recently, attentive citizens found that the ginkgo biloba and metasequoia in the Caiyun Lake National Wetland Park in Jiulongpo District have quietly changed color, the emerald green has turned golden, and the metasequoia has changed its "red makeup". At present, however, the yellow and red leaves are not transparent enough. But the beauty-loving citizens were not disappointed by the lack of brightness of the deciduous colors, on the contrary, they were particularly fond of this winter's exclusive "Maillard" color.
Chen Yan, a photography enthusiast who captures light and shadow here, said: "It's so beautiful, the breeze blows through the leaves, and the highly saturated hues give it a fairytale romance." ”
At the beginning of autumn and winter, after the plant enters the dormant period, its own chlorophyll is less, and lutein and lutein are more, so it shows the state of colored leaves. Liao Congquan, director of the Landscaping Management Department of the Municipal Urban Administration, said happily that what is different is that the temperature is high after the winter this year, the sunshine is longer, and the temperature at night is not low enough for the plants to "sleep" enough, so during the day from the appearance, the color of the leaves is relatively dull, and the brightness is not enough, which coincides with the cold tone of "Maillard".
You can wait and see, after two days of cooling, the plants will secrete richer pigments, and at that time, the color of our urban landscape will be layered, and the viewing effect will be better. Liao Congquan said.
Information**. The variety of skillful varieties is presented.
Exotic plants complement each other well with native plants.
In addition to the natural "Maillard" color system, Chongqing's autumn and winter color-foliage urban landscape is also the result of the ingenuity and careful layout of the city's landscaping plant varieties.
The Nanhu Colorful Botanical Garden in Banan District has introduced the red maple variety, and the red leaves all over the mountains are connected to the skyline, which is very visually impactful** Park in Yubei District is planted with patches of camphor, ginkgo biloba and metasequoia, which are green, yellow and red, creating a warm and layered visual effect ......
On Beibin 2nd Road, Jiangbei District, the brownish-yellow French plane trees and the green yellow kudzu trees complement each other. Liu Ya, a resident of Xinoupeng Education City Community, often comes here for a walk after work, savoring the "two seasons" street scene that is half golden and half green.
It feels like half summer and half winter, and you can shade under the big trees in the summer, and bathe in the warm sun under the trees in the winter, and feel the warmth of the sun shining on your body along the gaps in the leaves. Liu Ya couldn't hide her love for this colorful forest.
The yellow kudzu tree is a city tree, a tall tree, which does not have high requirements for soil and has a very strong adaptability. Fan Dan, head of the greening department of Jiangbei District Urban Administration, said that the yellow kudzu tree and the French plane tree are beautiful to plant, and the visual effect of planting in patches is also good.
The French plane tree is a relatively successful exotic plant introduced in Chongqing in recent years, and the yellow kudzu tree is a highly adaptable native plant. Liao Congquan said that the green yellow kudzu tree and the yellow French plane tree have high color contrast, and the urban landscape is more visually impactful.
The vegetation is regularly "looked at".
Behind the colorful is careful maintenance.
In order to ensure the healthy growth of urban flowers and trees, Chongqing will conduct a "physical examination" of plants every quarter. The "physical examination" program is also very comprehensive, how the pH of the soil is, whether the street trees are breeding for pests and diseases, and whether invasive alien species have been suppressed and eliminated......
For example, in 2020, we conducted a comprehensive 'physical examination' of urban green vegetation in the central urban area. Wang Sheng, vice president of the Chongqing Academy of Landscape Architecture, said that the vegetation of four categories of green space, 121 urban parks, 385 auxiliary roads, 18 squares and 14 protective green spaces in the central urban area were all included in the scope of "physical examination", and 1,076 copies of "physical examination forms" were submitted.
Through the analysis of these 'physical examination forms', we also found that there are many 'diseases' in the vegetation. Wang Sheng mentioned that the plants are redundant, impermeable, and the overall landscape is messyStreet trees have oversized canopies, dense foliage, and pests and diseases such as coal stain disease.
In response to the "symptoms" found in the "physical examination", Chongqing has compiled the "Chongqing Urban Landscaping Regulations", "Chongqing Urban Landscaping Maintenance Management Measures", "Chongqing Urban Landscaping Maintenance Technical Specifications", "Chongqing Street Greening Plant Selection and Configuration Technical Manual", "Chongqing Common Street Tree Pruning Technical Manual" and other relevant policy documents, standards and manuals.
These technical guidelines and standards are not the treatment of 'headache and foot pain', but overall planning and precautions. Liao Congquan explained that whether the selection of green space plants is scientific, whether the combination of native plants and exotic plants is compatible, and whether the soil is suitable for plant growth are all important contents of careful plant management.
For example, according to the Regulations of Chongqing Municipality on Urban Landscaping, the responsible units for the maintenance and management of urban landscaping and the tree rights units shall regularly prune and shape the trees to maintain the crown appearance. Recently, Jiulongpo District is carrying out the autumn and winter pruning and danger removal work of street trees in accordance with this regulation, and more than 7,800 evergreen trees in the district have been collectively "haircuted".
This pruning work is mainly aimed at fast-growing evergreen trees, eliminating potential safety hazards in time, ensuring the safety of roads, vehicles and pedestrians while promoting tree growth, and the landscape effect of street trees will be better next year. The relevant person in charge of the Jiulongpo District Urban Management Bureau said.