42种园林植物对SO_2伤害的敏感性研究

Studies on Sensitivity and Symptom Types of 42 Species Garden Trees Fumigated with Sulfur Dioxide

为了研究园林植物对SO2伤害的敏感性差异,试验在自行设计的密闭静态熏气室中,以不同浓度SO2分别对42种园林植物进行了熏气处理,记录了SO2处理后植株的症状类型、受害程度和显症时间等。结果表明:叶片被SO2急性伤害有两种症状类型:褪绿黄斑类和坏死褐斑类;42种园林植物对SO2的敏感性有很大差异,分为高度敏感、中度敏感、敏感、中抗和高抗五种类型;同时明确了不同园林植物的伤害阈值及临界浓度。

In order to select garden trees resistant to SO2 and to provide information concerning acute injury symptom types, fumigation experiments were carried out with 42 species in the stable fumigated chamber invented by the authors. The acute injury symptoms were observed, described and taken pictures. Based on the established threshold value of leaf injury and critical concentration, the relative resistance to SO2 of the tested trees could be grouped into 5 categories, which were very sensitive, intermediate sensitive, sensitive, resistant and more resistant. Two types of symptom, which were chlorosis and necrosis, were established according to the characteristic of leaf acute injury symptoms.