Study On Appraise And Afforestation Technique Of Biological Fire Belt In Zhejiang Area

Along with the gradually warming of global climate, forest fires were rising trend in the occurrence, forest fires not only caused a significant reduction in forest resources and at the same time lead to serious damage to the ecosystem balance. The forest fire happened frequently for it's high forest coverage rate in Zhejiang province. In recent years, some places have been brought to create a biological fireproof belt to prevent forest fire and have had certain effects, but the afforestation technology are not perfect. This study adopts sample plot investigation in Zhejiang existing biological fire belts set up to 80 standard tree growth, harvest firewood fire environment, forest litter content, surface soil moisture, etc, while evaluate the effect of different biological fireproof belt. We get the conclusions as follow:1 At present, the main species of biological forest fireproof belt is Schima crenata, followed by the sweet-scented Osmanthus, Sclerophylla, Elaeocarpus, etc.2 Different site conditions influence deeply on the growth of forest fireproof belt. The choice of seedlings have great impact on the period of effective forest fire prevention sooner or later, large seedling planting in favor of the fire to play a role in early.3 It's easy to forming the wet surface environment after 3 years of the constructions of the biological fireproof belt, and enhance the fireproof effect. 5 years later, easy to form a fire environment of a low temperature than the surrounding stand, stand high humidity than the surrounding.4 The amount of litter surface litter and litter content with the age growth stage, mid present, reduce the tendency in the late.5 the result of AHP method to assess the effect of fire prevent showed that:crown width, air relative humidity, soil thickness, planting density, litter moisture content influence on fire prevention deeply. Vertical composite structure belts, Artificial tending strength belt, good stand condition belt have effective fireprevent.Base on these conclusions, summarizes the Afforestation techniques for ridge, field boundary, surrounding the graveyard,different location in forst,road etc. In the shortest possible time produce fireproof effect of fire prevention belts.