论文部分内容阅读
中小学校园的绿化不仅可以美化环境,而且对学校工作,特别是体育卫生工作具有一定的作用。一是能保持空气新鲜。绿色植物是二氧化碳的消耗者和氧气的天然加工厂。在绿化良好的校园内工作、学习和活动,就会觉得精神爽快,心情舒畅。二是能过滤尘埃。高大树木的枝冠茂密减低了风速,使空气中的大粒灰尘下降,同时树木花草叶子表面不平,多绒毛,能分泌粘性油脂及汁液,吸附大量飘尘。三是有杀灭细菌的功能。绿叶植物能分泌出一种杀菌素。比如一公顷的刺柏能分泌30公斤的杀菌
The greening of primary and secondary schools not only beautifies the environment, but also plays a certain role in school work, especially sports and health work. First, to keep the air fresh. Green plants are natural consumers of carbon dioxide and oxygen. Working, learning and activities in a well-greened campus, you will feel refreshed and comfortable. The second is to filter dust. High branches of trees lush reduce the wind speed, so that the dust in the air of large particles, while the leaves of trees and flowers uneven surface, more villi, can secrete viscous oils and juices, adsorption of large amounts of fly ash. The third is to kill bacteria function. Leafy plants can secrete a bactericidal. For example, a hectare of juniper can secrete 30 kilograms of sterilization