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花卉苗木城市作用
[来源:http://www.qdmiaomu.com.cn/] [作者:567zx] [日期:18-09-29] [浏览次数:]

花卉苗木城市作用
Flower seedling City role
一、 净化空气,维持碳氧平衡
First, purify the air and maintain the balance of carbon and oxygen.
空气是人类赖以生存和生活不可缺少的物质,从城市的小范围来说,由于密集的城市建筑和众多的城市人口,形成了城市中许多气流交换减少和辐射热的相对封闭的生存空间。许多市区空气中的二氧化碳含量已超过自然界大气中二氧化碳正常含量300mg/kg的指标,尤以在风速减小、天气炎热的条件下,在人口密集的居住区、商业区和大量耗氧燃烧的工业区出现的频率更多。
Air is an indispensable substance for human survival and life. From a small scale, due to the dense urban buildings and large urban population, a lot of relatively closed living spaces with reduced air exchange and radiation heat are formed in the city. Carbon dioxide in the air in many urban areas has exceeded the natural atmospheric carbon dioxide level of 300 mg/kg, especially in densely populated residential, commercial and oxygen-burning industrial areas under the conditions of reduced wind speed and hot weather.
要调节和改善大气中的碳氧平衡,首先要在发展工业生产的同时,积极治理大气污染,研究把二氧化碳转化利用。其次是要保护好现有森林植被,大力提倡植树造林绿化,使空气中的二氧化碳通过植物的光合作用转化为营养物质。园林植被的这种功能,也是在城市环境这种特定的条件下,其他手段所不能替代的。
In order to adjust and improve the balance of carbon and oxygen in the atmosphere, it is necessary to actively control atmospheric pollution and study the conversion and utilization of carbon dioxide while developing industrial production. Secondly, we should protect the existing forest vegetation, vigorously promote afforestation, so that carbon dioxide in the air through plant photosynthesis into nutrients. This function of garden vegetation can not be replaced by other means under the special condition of urban environment.
二、 吸收有害气体
Two. Absorb harmful gases.
当城市的工业生产和民用生活中燃烧煤炭产生的二氧化硫,以及工业生产和汽车尾气等产生的空气污染物质达到一定浓度时,就会使环境受到严重污染。如空气中的二氧化硫浓度高达100mg/kg时,就会使人感到不适,当浓度达到400mg/kg时就会使人致死。
When the sulfur dioxide produced by burning coal in industrial production and civil life, and the air pollutants produced by industrial production and automobile exhaust reach a certain concentration, the environment will be seriously polluted. If the concentration of sulfur dioxide in the air is as high as 100mg/kg, it will make people feel uncomfortable, and when the concentration reaches 400mg/kg, it will cause death.

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