香樟为亚热带树种,树态优美,四季常青,是我国城市园林中的优良树种,它原产长江以南山地,喜偏酸性土壤。十多年来,上海地区在园林绿化中引种了大量香樟树,由于土壤偏碱性、种植养护措施不当等原因,少量香樟树出现黄化乃至死亡,尤其是近3、4年来,香樟树叶黄化现象日趋严重。笔者 Camphor is a subtropical tree species, beautiful trees, evergreen seasons, is an excellent tree species in urban gardens in China, it originates in the mountains south of the Yangtze River, hi acidic soil. For more than a decade, a large amount of camphor trees have been introduced in landscaping in Shanghai. Due to the alkaline soil and improper planting and maintenance measures, a small amount of camphor trees appear yellow and even death, especially in the past 3-4 years. Yellowing is worsening. author