Study On The Forest Health Assessment Of Quercus Aliena Var.acuteserrata In The Xiaolongshan National Nature Reserve

At present our country forest coverage rate and the forest area is especiallyplantation area sustained growth, make plantation forest single structure and lessbiodiversity and the stand lower stability problem, so how to improve the health levelof the forest, how to improve the biodiversity of the forest and productivity andbecome the new problems we face. The forest ecosystem health evaluation as acurrent forestry and ecological protection of new research area, although at present isstill controversial, but it can be to work out the science of forest protectioncountermeasures provide scientific basis, to improve the level of sustainable forestmanagement have an important effect, have higher theoretical and practicalsignificance.Based on the investigation, to establish a suitable health assessment indexsystem for Quercus aliena var.acuteserrata in the Xiaolongshan National NatureReserve to provide theoretical basis and methods for health management and earlywarning.16plots were selected in the Xiaolongshan National Nature Reserve.Discussed the impact of the main factors of regional forest health, and the resultsindicated that:1．From the forest structure, plant diversity, plantation stability.in line withmaneuverability, scientific, comparability, the principle of acceptable, in numerousindex were crown density, biomass, leaf area index, net productivity, Shannon-Wienerindex, pielou index, dominance index, richness index, diseases and pests degree,altitude, slope of12indexes to evaluate health in the Xiaolongshan National NatureReserve.2. Preliminary construction area Quercus aliena var.acuteserrata in theXiaolongshan National Nature Reserve health evaluation index of the screening, usinga qualitative and quantitative method, and uses the current widely application ofdetermining weight method, the principal component analysis, analytic hierarchyprocess (ahp) model with Matlab determine the organizational structure, plantdiversity, plantation stability three aspects12health evaluation indexes weights.3. In the study area Quercus aliena var.acuteserrata survey data and the index weight calculation analysis, the selection of16plots, the result was that a largeportion of forests were in health level.4. Through the research area Quercus aliena var.acuteserrata in healthevaluation result, in the Xiaolongshan National Nature Reserve. It should be naturalQuercus aliena var.acuteserrata eventually structure. Analyze the influence thehealth level of direct factor is the structure and low stand tree species diversity, it isnecessary to stand structure and diversity to control.