Investigation Analysis of Hazards of High Temperature and Heat Wave to Subtropical Garden Plants

Abstract:

In recent years, the frequency of global heat wave events has increased significantly, and the impact scope and duration have gradually expanded. Continuous high temperature and heat wave will seriously inhibit the growth of plants, resulting in plant wilt and even death. The effects of high temperature and heat wave on the growth of 105 species of subtropical garden plants were studied through field investigation, and the response degree of plants was analyzed according to plant functional groups and origin. The results showed that plant groups and habit affected the response to high temperature and heat wave. The wilt rate of gymnosperms was significantly higher than that of angiosperms under high temperature and heat wave, and 35.71% of gymnosperms suffered serious damage, while only 6.59% of angiosperms suffered serious damage. The blight rate of deciduous plants was significantly higher than that of evergreen plants, which 21.21% of deciduous plants were seriously damaged, and did only 5.17% of evergreen plants. Therefore, it was pointed out the direction for the protection and cultivation management of subtropical plants under high temperature and heat wave, and provided practical scientific recommendations.

Key words:Heat wave;Subtropical plant;Functional group;Wilting