Comparative Study on Flammability of Fresh Leaves and Living Branches of 10 Tree Species in Central Yunnan Province

The flammability of fresh leaves of 10 woody species in central Yunnan Province was evaluated by means of comparing the difference between the heat released from the burning of fresh leaf extracts and the heat consumed by water evaporation from the same extract of fresh leaves. The result showeds that the order of flammability of the fresh leaves of these 10 species from high to low was: Eucalyptus globules, Cupressus duclouxiana, Pinus armandii, Pinus yunnanensis, Camellia sinensis, Acacia mearnsiie, Alnus nepalensis, Quercus variabilis, Albizia kalkora, Pyrus pashia.The similar study was done to compare the flammability of living branches of the same 10 woody species, it was showed that the flammability order of living branches of the 10 tree species in central Yunnan Province from high to low was:Cupressus duclouxiana, Quercus variabilis, Eucalyptus globules, Camellia sinensis, Pinus armandii, Pinus yunnanensis, Albizia kalkora, Acacia mearnsiie, Pyrus pashia, Alnus nepalensis.