Dissertation > Excellent graduate degree dissertation topics show

Study on Modeling of Competition Indices of Pinus Tabulaeformis Individual Treesat Badaling Area

Author: ZiLaiBi·MaiMuTiMing
Tutor: YangHua; ZhaoGuangLiang
School: Beijing Forestry University
Course: Forest Management
Keywords: Pinus tabulaeformis central tree competitor competition indexof individual trees competition models
CLC: S791.254
Type: Master's thesis
Year: 2012
Downloads: 59
Quote: 0
Read: Download Dissertation

Abstract


In this research, Pinus tabulaeformis at Badaling national forest park was the research’s object, purpose is gain the best individual competition model of Pinus tabulaeformis. It has realistic means in individual tree modeling research,growth and yield study、undergrowth study,thinning phenomenon、 simulate various kinds of tending and select cutting etc.This study important to badaling pinus forest’s space structure study, and important to perfect the ecosystem of this area.Pinus tabulaeformis in this area is about38years old in average of this area,stand density is800-1200tree/hm2, gradient is about50°,height above sea level is about500-800m,average annual temperature is about6-7℃,annual precipitation is about500mm.On the basis of mathematic and theoretic methods,the rightness sample radius is7.5m.the number of central tree is328in three sample plot’s or all Pinus tabulaeformis in three samples, edge effects eliminated by shifting methods.All the trees in this area is competitieve trees,also i ncluded the trees obtained from shifting.To enhance the accuracy of the competition index,we selected the best individual competition index from nine indexes related or unrelated to distances.This index is CI1(CI1=the DBH of the central tree xthe average distance of the nearest eight tree/the average DBH of the nearest eight tree)The DBH individual competition model of the Pinus tabulaeformis is:CI1=-0.285D+0.003D2-0.0002D3, R2is0.944; the hight model is CI1=-0.755H+0.018H2, R2is0.885; the crown model is CI1=-1.172C, R2is0.887according to error percentage testing method,accuracy is about96.397%,according to regression method this models also proper.

Related Dissertations

  1. Study on Quantitative Characteristic and Biodiversity of Pinus Tabulaeformis Plantation Communities in Dongshan Mountains, Taiyuan,S791.254
  2. Induction of Embryogenic Callus of Chinese Pine (Pinus tabulaeformis Carr.),S791.254
  3. Characteristics of Solar Radiation and Its Distribution above the Canopy of the Pinus Tabulaeformis,S791.254
  4. Centralized program of EU competition law on corporate regulation and its Reference,D996
  5. Research on the the Chinese the Railcom service marketing strategy,F626
  6. Analysis and Research of Qujing Cigarette Factory competitive intelligence system (CIS),TP311.52
  7. The Ecological Responses of Pinus Tabulaeformis Forests in Taiyue Mountains to Harvesting,S718.5
  8. Study on Photosynthesis, Transpiration and Drought Tolerance of the Seedlings of Ten Provenances of Chinese Pine (Pinus Tabulaeformis Carr.),S791.254
  9. Study on the Resistant Mechanism of Chinese Pine to Red Turpentine Beetle,S763.3
  10. Research on REAL Estate of Wuhan,F293.3
  11. The Study of Enterprise’s Counterintelligence,F272
  12. Study on the Soil Water Characteristics of Pinus Tabulaeformis Plantation of Daqing Mountain,S714
  13. The Research and Realization of the Model of Customer Relationship Management System,TP311.52
  14. Variable Growth Intercept Models and Stand Dominate Height Growth Process for Chinese Pine (Pinus Tabulaeformis) Natural Forest in the Guandishan Forest Region,S791.254
  15. Study on Culture Characteristic of Ectomycorrihizal Fungi and Mycorrihizal Synthesis of Pinus Tabulaeformis in Daqing Mountain,S718.81
  16. Dalian fortunes Building Competitive Strategy Research Ltd.,F279.26
  17. Differentiation Marketing Strategy Research of the Xinyangping Dairy Group in Chengdu Market,F426.8
  18. Studies on the Relation between Density and Undergrowth Diversity of Pinus Tabulaeformis and Populus Davidana Forests in DA WO PU,S718.5
  19. Simeon Marketing Strategy and Tactics,F274
  20. On the relationship between China's travel will launch a marketing strategy,F719
  21. The Pinus tabulaeformis soilless cultivation lightweight matrix formulation screening studies,S791.254

CLC: > Agricultural Sciences > Forestry > Forest tree species > Coniferous > Loose > P. tabulaeformis
© 2012 www.DissertationTopic.Net  Mobile