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一、银杏。亦称白果树,为我国特产优良树种,也是世界五大观赏名木之一。它性喜深厚肥活、排水良好的酸性土、中性土及钙质土,有较强的耐烟尘,吸收二氧化硫等毒气的能力,适宜于作行道树和庭园树。二、榆树。落叶乔木,高可达30米,树皮深褐色,叶小厚硬,果圆如钱,枝条下垂,依依如柳。该树耐寒、耐干旱、耐瘠薄,可抗二氧化硫、氯、氟等有毒气体和虫烟之害。榆叶表面粗糙,滞尘能力强,吸附粉尘每平方米叶片可达10克以上。
First, ginkgo. Also known as white fruit trees, for our specialty products excellent tree species, but also one of the world’s top five ornamental trees. It likes deep fat and lively, well-drained acidic soil, neutral soil and calcareous soil. It has strong resistance to dust and dust and absorbs the poisonous gas such as sulfur dioxide. It is suitable for roadside tree and garden tree. Second, elm. Deciduous tree, up to 30 meters high, dark brown bark, small thick leaves, round fruit such as money, branches drooping, Yiyi, such as willow. The tree is cold-hardy, drought-resistant and barren-resistant, resistant to poisonous gases such as sulfur dioxide, chlorine, fluorine and insect pests. Elm leaf rough surface, dust ability, adsorption of dust per square meter leaves up to 10 grams or more.