Objective According to the characteristics of forest fires and afforestation species in Jianshui County, Yunnan Province of southwestern China, 18 major afforestation species were selected as research objects, aiming to screen out fire resistant tree species suitable for forestry development in Jianshui County, and in order to provide a certain theoretical basis for forest fire prevention in this area.
Method Using 16 indicators (the physicochemical properties and combustion properties of tree species such as water content, crude fat and ash, the biological and ecological characteristics of tree species such as thick and thin canopy, leaf thickness and bark thickness, and the natural regeneration ability of tree species, seedling source and afforestation) as evaluation factors, and the fire performance of 18 species was comprehensively evaluated by typical sampling, point selection survey, experimental measurement and analytic hierarchy analysis.
Result According to the assessment results, the tree species were divided into four categories, category I (optimal fire resistance trees): Michelia macclurei, Pistacia chinensis, Camellia oleifera, Pittosporum brevicalyx are the preferred species for fire-resistant forest belts; category II (secondary fire resistant trees): Ternstroemia gymnanthera, Photinia serrulata, Ligustrum lucidum, Cyclobalanopsis glauca, Symplocos sumuntia, which can be used as a fire-resistant tree species to create a biological fire-fighting forest belt; category III (ordinary fire resistant trees): Quercus acutissima, Quercus variabilis, Pistacia weinmannifolia, Sapium discolor, which are difficult to plant as a fire tree species, but can be used for forest fire prevention; Category IV (non fire resistant trees): Pinus yunnanensis, Fraxinus malacophylla, Eucalyptus globulus, Pinus massoniana, Platycladus orientalis, have poor fire performance and should not be used as fire tree species and should be protected.
Conclusion In view of the current characteristics of forest stand structure with single forest structure and large forest area in Jianshui County, it is suggested that category I and category II fire tree species can be built as the main bio-fire forest belt in the future to achieve the purpose of blocking the spread of forest fires; the fire performance of the category III tree species is general, and the field can be planted in combination with category I and category II fire tree species according to site conditions and regional characteristics.
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