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Compared with the air purification ability of plants, guibeizhu showed super formaldehyde absorption

Compared with the air purification ability of plants, guibeizhu showed super formaldehyde absorption ability

Yesterday, Nanjing Municipal Bureau of greening and landscape architecture released a list of air purification capacity of plants, and carried out experiments on 57 kinds of plants with the Institute of Botany of Jiangsu Academy of Sciences and Nanjing University of information technology. The experiment showed that aloe vera, a well-known plant, was the least absorbed formaldehyde, and the unit leaf area absorbed haze. The Nanjing roadside tree parasol tree ranked the same. Which plants are at the top of the list? Will the greening and landscape department plan green plants according to the list?

PK purification ability of 57 plants

How to strengthen the function of urban green space in reducing air pollution is an important issue. The reporter learned that Nanjing Municipal Bureau of greening and landscaping, together with Institute of Botany, Chinese Academy of Sciences and Nanjing University of information engineering, has for the first time conducted an interdisciplinary quantitative study on the reduction of PM2.5 and pollution gases by common urban greening tree species and indoor green plants. It is understood that the experiment in the artificial simulation room using real-time online monitor, for 33 kinds of common landscaping tree species and 24 kinds of green plants were tested.

Outdoor group: Landscape Plants

"Tall" in the maple poplar crown, gardenia "small body ability"

Number of competitors: 33 species (including 21 species of trees and 12 species of shrubs)

Test content: reducing effect on PM2.5, sulfide, nitride and other three harmful gases

Among the 33 kinds of landscape plants in the experiment, there are common street trees in Nanjing, such as Jatropha curcas, Cedrus deodara and Cinnamomum camphora, as well as "high appearance" ornamental tree species, such as cherry blossom, Magnolia and plum blossom, and "short" shrub species, such as gardenia and Michelia. However, in the same competition with the tall and straight "arbor group" players, will the petite "shrub group" players suffer from "short stature"? According to the experts participating in the experiment, their experimental data are divided into two types: single plant and unit leaf area. The latter group of experimental data will make some "small and powerful" plants stand out in the competition.

The comprehensive absorption effect of Ginkgo biloba and Magnolia were in the forefront.

Post competition comments:

Pterocarya stenoptera

A well deserved "all round player"

In the PM2.5 absorption rate that people are most concerned about, Liriodendron chinense, Euonymus japonicus and Pterocarya stenoptera occupy the top three, and Pterocarya stenoptera also occupies the top in the list of absorbing sulfur dioxide and nitrogen compounds, which can be said to be worthy of the top rank of air purification plants. In the data of harmful substances absorption per unit leaf area, Gardenia jasminoides Ellis, which is relatively small in size, stands out alone, and is a large part higher than other plants.

Indoor group player: domestic green plants

"Black horse" turtle back bamboo absorbs nearly 90% formaldehyde, and "seed player" aloe is at the bottom

Number of competitors: 24

Test content: absorption of indoor formaldehyde

For indoor air, the most harmful substance is formaldehyde. Which plants are good at absorbing formaldehyde? The experimenters injected 2ppm formaldehyde into the fog box to observe the absorption of formaldehyde by plants within two hours. Among them, "black horse player" has absorbed nearly 90% of formaldehyde and performed well.

On the contrary, the ranking of some "seed players" that people usually place high hopes on is not satisfactory. For example, we are familiar with the green pineapple, Chlorophytum, rubber tree ranking are not at the top, and was advertised as "formaldehyde absorption little expert" aloe is disappointing, single formaldehyde absorption capacity ranked at the bottom. Among the formaldehyde absorption efficiency per unit leaf area, aloe is still not high, ranking the seventh from the bottom. Brazil's iron is the top of the list, in which guibeizhu also entered the top five.

Post competition comments:

aloe

Indoor green plants still have a place

It seems that Aloe really can not be regarded as an expert in absorbing formaldehyde. So, should aloe be removed from the list of indoor green plants? Experts say that the effect of indoor plants can not be measured by the single absorption of formaldehyde. We should also see that aloe, as a domestic green plant, still has other contributions, such as the balance of water, photosynthesis and oxygen release, so it can't be "one stick" "Beat to death".

Explanation of garden department

Fatong's haze absorption efficiency ranks low. Do street trees still "reuse" it?

The contestants are "young", "adult" Fatong is still good

It is worth noting that in the data of unit leaf area absorption of PM2.5, Nanjing's index tree, French Indus, ranked sixth, absorbing sulfur dioxide and nitrogen compounds at the end. Is the effect of Fatong on Greening really the same as that in the ranking?

Yu Jinping, a researcher at the Institute of botanical garden of the Chinese Academy of Sciences, told reporters that it is unfair for Fatong to compare a single leaf. "You can see that the absorption of sulfur dioxide and nitrogen compounds by single plant is in the top three, and PM2.5 is in the ninth. Although its efficiency is not high in the test of unit leaf area, its haze removal ability as a whole plant is still very strong. "

Yu Jinping also told reporters that because the plant of Fatong is too big, the relatively small Fatong was used in the experiment. "In urban roads, Fatong trees are 20 to 30 meters high, and the whole plant will absorb more pollutants. In addition, when we plant street trees, one of the functions is to purify the air. The shading and cooling function of Fatong in summer can not be replaced by other tree species. So planting Fatong is still a good choice for us

Will they "divide their work and work together to show their strengths" according to the results of this competition?

Factories and roadsides will send different tree species to "stand guard"

Zang Tingliang, director of science and Technology Department of Nanjing Municipal Bureau of greening and landscape architecture, told reporters that last year, the Department of landscape architecture, the Institute of Botany and Nanjing University of information engineering started the experiment. The results released this time added more tree species and green plants. "According to these data, we will also build green scientifically in our work, and plant different tree species according to different polluted environments, such as plants with strong reducing ability in factories with heavy sulfur dioxide pollution and surrounding residential areas. For roads with large exhaust emission and traffic flow, the greening should choose the road with strong ability to reduce nitrogen compounds. "

Director Zang said that now the design of pure lawn is less and less used in the green space construction in Nanjing. After understanding the effects of plants, we can choose trees and shrubs with strong air purification ability to "join hands". By planting these trees, we can eliminate the pollutants in the air to the greatest extent and bring fresh air to the citizens. (source: China Daily)