Study On Canopy Fuel Loading In Sub-Compartment Of Miaofeng Mountain Forestry Farm

This research studied six kinds of main trees in Miaofengshan Forest farm of Beijing.Sampling,field investigation and the standard branch method were used to study the load of Fuel in forest small class canopy,and the following conclusions were obtained:(1)We have collected the total biomass of the branch and the biomass of each part(active branch,branchlets and Big Branch.The branches were divided into three types:litter lhr,litter 10hr and litter 100hr,and the biomass models of different tree branches were obtained,as shown in table 4-6.There were differences in the biomass of the branches of different lengths and different basal diameters.There was a correlation between the biomass and the independent variable(length and base diameter).The significant level is 0,which is less than the significant level threshold 0.001.As the correlation coefficient of the r2 model was greater than 0.9,meaning the fitting degree was good.Therefore,if the length and diameter of a branch are obtained,the total biomass of the branch and the biomass of each part can be estimated according to the model.(2)The regression equation of canopy biomass was obtained by regression analysis of different arbor diameter and tree height and biomass,as shown in table 4-8.There is a correlation between canopy biomass.The fitting degree was good,and the significance was less than 0.05.Therefore,the canopy biomass of the arbor and the biomass of each part can be estimated by the height and diameter of a single tree.(3)Using the forest resources survey data,we have estimated the canopy Fuel load and different types of fuel load in each small class in the forest farm.Table 4-10 shows the number of each small class,the composition of small class tree species,the dominant tree species and the corresponding canopy Fuel load.(4)To study Miaofengshan Forest Farm,the Fuel load level distribution map(Fig 4-1)during the 2017-year forest fire peiod in the study area is made.This provides a more intuitive observation of the amount of Fuel,which offers a reference for the control of Fuel.Through the above figure we can clearly and intuitively see that one small forest canopy load is too large.It need to be cleared or requires special attention.