Dissertation > Excellent graduate degree dissertation topics show

Studying on Biomass and Distribution Pattern of Herbaceous Plants in Desert Region of Inner Mongolia

Author: ShuYang
Tutor: LiuZhaoGang
School: Northeast Forestry University
Course: Forest Management
Keywords: Herb Model Biomass Distribution pattern Aerial photographs
CLC: S812
Type: Master's thesis
Year: 2008
Downloads: 85
Quote: 0
Read: Download Dissertation

Abstract


Desertification has become the world's concerns, and the herb has an irreplaceable role in the sand sand work. Inner Mongolia is the most extensive area of ??desertified lands in China provinces, to change this situation, it is necessary to correctly evaluate the proposed solutions productivity. Based on the survey data Inner Mongolia 磴口县 region, direct harvest method for biomass herbs, the use of linear and non-linear regression model was constructed individual biomass model, and predict the survey area population biomass and plots herbaceous biomass; five aggregate indices and the I-wao M , * - (?) regression model, and Taylor power law analysis of a variety of species distribution patterns and for the first time using poly the block index M * / (?) and the aerial photograph extraction herbaceous coverage build herbaceous biomass prediction model. The results show that 1) representative of the results of the large plots, high prediction accuracy; 2) the impact of herbaceous biomass by the study of the study area is mainly affected by the canopy, plant height and diameter at ground factor, the individual biomass of each species The amount of the model are as follows: reed W = 12.4732 0.3459 (D CW) H; Saudi Inula W = 0.3101CW 1.6338 ; Salsola W = 0.0360CW 2.3964 ; Sand meters W = 0.0087 (D 2 H) 0.7999 (CW 2 D) 1.5857 ; Cleistogenes W = 0.4293 (CW 2 H) 0.8037 ; Sand whip W = 4.1019 (D 2 H) 0.4592 ; frost the quinoa W = 0.1957CW 1.5742 ; can be seen from the above to select the optimal biomass model, crown width (CW) is the primary factor of herbaceous biomass; 3) of the study area herb reed populations showed the highest value of 29.98, the Saudi Inula times 18.40; 4) aggregate indices results show the various groups mainly clustered distribution, a small number of low-density plots distributed randomly and evenly distributed; IwaoM * (?) regression confirmed rejection among the reeds, Saudi Inula Salsola and Sand whip populations of plants, of Shami and dasyphylla populations were individual group distribution; Taylor power law of the test results to prove all the greater the population density, the greater the degree of aggregation; 5) aggregation number λ results show more than 90% of the aggregate distribution is caused by external factors and species characteristics; 6) poly block index and aerial photograph method to draw the region herbaceous biomass model: W * = 9.6907 0.0022 [N * x, Ms] and W * = -6.3370 2.2451C this article about Inner Mongolia individual biomass of the herbaceous model, the total biomass prediction model and analysis of the level of population distribution pattern of the study area, directly reflects the population advantage and made scientific biomass prediction methods apply to the evaluation of the productivity of the region, in order to further research community characteristics, as well as the future, Inner Mongolia, desertification control, revegetation and to propose effective business decisions provide a strong scientific basis and reference.

Related Dissertations

  1. Research on Magnetic Field Sensor Based on GMI Effect and Geomagnetic Matching Algorithm,P318
  2. EDM Electrode Wear Mechanism and Control Research,TG661
  3. Experimental Study on Pyrolysis and Combustion Characteristics of Paint and Tar Based Single Hazardous Wastes,X705
  4. Powered Activited Carbon-UF for Treating Micro-polluted Surface Water,X703
  5. Design and Research on Stabilization Loop of Gyro Stabilized Pod Control System,V241.5
  6. Satellite Attitude Control Methods Using Only Magnetorquers,V448.222
  7. Investigation of Turbine S2 Stream Surface Direct Problem Aerodynamic Optimization Design,V235.11
  8. Temperature Drift Modeling and Compensation of Fiber-Optic Gyroscopes,V241.5
  9. Research on Models and Simulation of Electromagnetic Railgun Exterior Trajectory,TJ399
  10. The Technological Parameter Analysis and Influencing Factor Research on RUV4 Automobile Ignition Coils,U463.64
  11. The Study of Control Algorithm for Automotive Power Window Based on Lin Bus,U463.6
  12. The Research of Residential Community Design of Vanke Model,TU984.12
  13. Numerical Simulation of Biomass Direct Reburning,TK16
  14. Experimentation Research for Deoxidize Reaction Process of NO_X Adopt Different Reburnning Fuels,TK227.1
  15. Study of Updraft Biomass Air Gasification and Tar-Reducing Technology,TK6
  16. The Equivalent Circuit Model of Radial Vibration Mode Piezoelectric Transformer and Its Application,TM406
  17. Research on Compensation of Hysteresis in Piezoceramic Actuators,TM282
  18. The Design and Accomplishment of Simulition Platform for Voltage Clamp Experiment Based on Cell Electrophysiological Model,R318.0
  19. A Study of the Application of TBLT to English Teaching in Rural Middle School,H319
  20. Quantitative evaluation model based on information entropy of the classroom observation,G632.4
  21. High school politics,the new curriculum reform classroom teaching model to integrate exploration,G633.2

CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Grassland Science,prairie school
© 2012 www.DissertationTopic.Net  Mobile