一、屋面绿化的作用西安是中外闻名的历史文化古城,目前城市居民占有公共绿地面积仅有2.5平方米,绿化用地甚少,远远不能满足居民的需要,再加上工业、交通不断地形成和发展、大气污染、噪声干扰,环境质量日益下降。鉴于上述种种情况,我们进行了屋面无土栽培绿化试验,以增加绿化面积,经过一年来的努 First, the role of roof greening Xi’an is a famous historical and cultural city of China and foreign countries, the current urban residents occupy only 2.5 square meters of public green space, very few green land, far from meeting the needs of residents, coupled with the continuous formation of industry and transportation And development, air pollution, noise interference, environmental quality is declining. In view of the above-mentioned circumstances, we conducted a greening experiment on soilless cultivation of roofs to increase the green area after one year