主播 | 小伙子 嘉宾 | 史军街边的杨树，怎么还扎上针管了？不仅有扎针的，还有钉上蛹的，这些蛹又是干什么用的？它们又有什么作用？动不动就黏糊糊一片的车玻璃，是不是国槐喷树胶的锅？银杏离开人类竟然就活不下去啦？本期节目，植物学家史军老师再次做客日谈，解答了小伙子一肚子的困惑，也给我们讲述了城市绿化的无穷奥妙。在城市里搞绿化，一草一木都有讲究：一棵合格的行道树，要能完美适应当地气候，要强壮到能顶住狂风而不被刮断，要枝繁叶茂到足以顶出一片夏日的绿荫，最好还能不给人添麻烦——少飞毛毛，不喷树胶，让清洁工人能早点休息，车主少洗几回车，鼻炎患者也少流几回眼泪。从选育到养护，我们目之所及的“楼下日常”背后都是学问。把一根针管楔进树干的是一环扣一环的科学考虑，也是人类智慧与自然规律的完美融合。没事就到你家小区楼下看看花草树木吧，这可都是花了大价钱打造的！| Songlist |Trio Artemis/Dmitri Shostakovich - Suite for Jazz Orchestra No. 2:Waltz No. 2
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