Abstract: To understand the new leaves combustibility of different garden woody species,combustion experiments of 11 woody species new leaves and 2 comparison trees old leaves were conducted during the peak fire season.The combustion experiments measured such factors as moisture content,mass area ratio,burning linear rates,burning area rates,burning mass loss rates,vein damage degree,area damage degree,mass damage degree,etc.The results showed that the burning rates and damage degree of Osmanthus fragrans,Chimonanthus praecox,Acer davidii,Liriodendron chinensis were stronger than the others,the difference of the remaining 7 kinds of plants burning rates and damage degree were not significant.The burning rates and damage degree of Exbucklandia populnea and Camptotheca acuminate were the lowest,the burning rates and damage degree of Osmanthus fragrans old leaves and Chimonanthus praecox old leaves were stronger than their new leaves.

Key words: Kunming, garden trees, nwe leaves, combustibility