The Combustibility Research On Some Vegetation Of Fuzhou National Forest Park

Fuzhou national forest park is a comprehensive park which integrating tourism, leisure, entertaiment, scientific research and education. To collect, plant, exhibit Fujian precious tree species is given priority to, while introducing a variety of precious tree species at home and abroad to build multiple plant species-divided gardens and form the trees as well. Forest park nature's natural scenery and unique human landscape attracts large numbers of tourists, but it also brings forest park fire cause serious test. Forest park covers a big area and has a high coverage rate, in addition to the center area of park it owns large tracts of forest and plants a variety of precious tree species in the event of will be big loss.The forest fire is the most terrible disasters in the forest. It not only burns the forest and hurts the animals in the forest, and it also reduces the ability of forest regeneration, causing poor soil, destructing forest water conservation, polluting the air and also leading to the ecological environment out of balance, hazard of forest fire is serious and put it out difficultly, so prevention is particularly important. Forest fire prevention of China policy is "prevention first, elimination actively". Prevention is the premise and key, and meanwhile, building forest fire prevention belt is one of the important measures of preventint and controling fire. Construction premise of protection belt is to first screening fire-resistant tree species, Study of tree combustibility is taken in the paper, using the combustion characteristic differences between species to screen out construction species of protection belt, in addition to the constrution of protection belt, monitor and inspect for flammable species areas so that they can at the time of forest fire occurrence just put it out to reduce losses and impact on forest ecosystems. (1) By the correlation analysis of calorific value and lignin content,crude fiber content,crude fat content.it shows that calorific value and lignin content,crude fiber content,crude fat content is positively correlated\so it can be concluded that the more the lignin content,crude fibercontent and fire intensity levels of trees.the higher calorific value.It's negative correlation between crude ash content,fuel ignition and calorific.which shows that the more the crude ash content and ignition of trees,the lower calorific value. By the correlation analysis of fire intensity levels and fire time,it shows that it's negative correlated between fire intensity levels and fire time, indicating that the fire time is shorter when fuel burning is caused by the higher of fire intensity levels,so the fire intensity levels of fuel can be judged roughly by calculating time.(2) Non-flammable tree species are Camellia oleifera, Symplocos setchuensis, Viburnum odoratissimum, Ligustrum lucidum, Schima superba Gardn, Populus Canadensis Moench, Michelia macclurei, Michelia figo, Ilex chinensis. Magnolia denudata, Camptotheca acuminata. The flammable tree species are Acer fabri, Pseudolarix amabilis, Cryptomeria japonica var. sinensis, Juniperus chinensis, Pinus massoniana, Phyllostachys edulis, Cunninghamia lanceolata, Cunninghamia lanceolata, Metasequoia glyptostroboides, Cedrus deodara.(3) The experimental measurement of 14 index in the 30 species'fresh leaves ofFuzhou national forest park which moisture content, calorific value, ignition point, crude ash, crude fat, crude fiber, lignin, fire intensity levels and so on is taken in the paper, with using the principal component analysis to sort 30 species of combustibility, the combustibility from strong to weak is Pseudolarix amabilis> Phyllostachys edulis> Pinus massoniana> Acer fabri> Cedrus deodara> Cunninghamia lanceolata> Metasequoia glyptostroboides> Cryptomeria japonica var. sinensis> Juniperus chinensis> Osmanthus fragrans> Cinnamomum camphora> Lithocarpus glaber> Liriodendron chinense> Acacia confusa> Populus Canadensis Moench> Elaeocarpus sylvestris> Loropetalum chinense> Paulownia fortunei> Manglietia patungensis> Nerium oleander> Camptotheca acuminata> Ligustrum lucidum> Michelia figo> Michelia*alba> Camellia oleifera> Schima superba Gardn> Ilex chinensis> Michelia macclurei> Symplocos setchuensis> Viburnum odoratissimum. Through the combustibility study of 30 species, it can be screened out that 11 kinds of treespecies can be used as fire protection belt of forest, which is Camellia oleifera, Symplocossetchuensis. Viburnum odoratissimum, Ligustrum lucidum, Schima superba Gardn, PopulusCanadensis Moench, Michelia macclurei, Michelia figo, Ilex chinensis, Magnolia denudata,Camptotheca acuminata; With regard to the concentration distribution area of 9 flammable speciesis to strengthen care and add respair equipment.