Change Analysis And Trend Study Of Regional Forest Tree Cutting Volume And The Cutting Structure

Deforestation is a production activity in the process of forest management.On the one hand,though deforestation,people use timber products to gain economic benefits for forest management units,on the other hand,forest resources as a means of artificially adjust the structure of the forest,through the reasonable cutting could adjust the reality unreasonable forest structure.First of all,this thesis made an investigation and analysis on the forest harvesting management mode in our country and the domestic and foreign research present situation of deforestation for references.In longquan as the study area,in forest tree cutting as volume,the thesis analyzed the dynamic change of six aspects mainly from the overall situation of the cutting,the cutting of the origin of forest stand structure,the structure of the tree species and forest category structure,the cutting type and cutting operations.Secondly the thesis from the policy system,economic development and household characteristics to extract the main factors,using multiple regression model to analyze factors that affect forest felling;Finally the thesis use a Winters additive model for the Regional Forest Tree cutting structure for trend analysis.After the analysis,we can get the following conclusions:(1)The logging is active in the longquan,which is for a little effects on the structure of forest resources of the forest.there are 9040 the felling licensees distributed per year on average,involved in the cutting area of forest land area of 6.8%.(2)The cutting of the main tree species is Chinese fir trees,accounted for 76.65% of the whole cutting trees,main cutting forest land is plantation,accounted for 89.30%;Forest category of timber forest,accounting for 92.96%;Main cutting type of final felling,accounting for 80.53%;Logging is given priority to with clear cutting,accounting for 82.92%.(3)The whole longquan cutting structure change indicators are declining,but the accumulation of per unit area of the cutting on the rise,longquan forest by the quality to the good development trend by the analysis.(4)The wood cutting volume and wood clear cutting volume are linked to the accumulation of the cutting quota,forestry output and per capita income;And the quantity of bamboo cutting volume,timber thinning amount of selective and forestry output value has a positive correlation;Final felling timber volume and accumulation of cutting quota,forestry production were positively correlated;(5)By the Winters additive model on the cutting structure analysis of the trend,it is concluded that the seasonal rise in longquan logging activities,whichas the highest peak in April and July.