Dissertation
Dissertation > Economic > Agricultural economy > China 's agricultural economy > Agricultural sector economy > Forestry

Sustainable Management on Natural Forest in Daxinganling Region

Author LiChangSheng
Tutor FengZhongKe
School Beijing Forestry University
Course Forest Management
Keywords Natural forest sustainable management landscape index yield regulation resource dynamic
CLC F326.2
Type PhD thesis
Year 2008
Downloads 294
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The sustainable management of natural forest has become an important study subject in the modern world’s forestry development. Mangui Forestry Bureau in Daxinganling of Neimeng was as the study area, where was the better region for the sustainable management of natural forest in China. Data of 4 times forest management inventory, forest map, forest inventory database, 128 plots, 384 standard trees and 21 stem analysis trees almost 50 years were collected. Data of forest continuous inventory and other district of Daxinganling were collected as reference. In this paper, first, the correction pretreatment of raster images of the forest resources’ spatial data in Mangui Forestry Bureau was done, the spatial images was vectored, and the properties database of the forest resources was loaded and the spatial distribution images were created by using ArcGIS. After that, the dynamic of land area, forest area volume, area volume of dominant stand, stand area volume of age classes, volume of composed tree species and stand canopy density were analyzed. Then, the Landscape Shape Index, Mean Shape Index, Area-Weighted Mean Shape Index, Double Log Fractal Dimension, Mean Patch Fractal Dimension, Area-Weighted Mean Patch Fractal Dimension, Shannon’s Diversity Index, Shannon’s Evenness Index, Simpson’s Diversity Index, Simpson’s Evenness Index, Modified Simpson’s Evenness Index and Modified Simpson’s Diversity Index were calculated. The dynamic landscape of Mangui Forestry Bureau was analyzed by the analysis of the dynamic space of forest landscape the interval of which was 30 years. Moreover, sustainable models of softwood and hardwood in that area were established. Regulation control of sustainable management was done for the forest resource. The public benefit forests were devised into water-reserving forest, soil and water conservation forest, road protection forest, natural reserve forest, environment protection forest and tourist forest. Commercial forests were devised into quick growth and high productivity forest and common timber. Finally, the techniques of forest sustainable management on forest harvest, forest thinning, forest regeneration, seedling production protection of disease and insect and wetland management were suggested.The novelty of this paper was that: (1 )It took stand as spot in forest landscape, and the types of forest landscape consisted of land type, stand type and its age group. The main reasons were that lands of clearcutting and fire had been regenerated and closed. It had no much change on forest coverage. The proportion of poplar and birch increased. But the average volume per hectare decreased a lot. (2) Using Ma’s distance defined forestry sustainability. Concepts of sustainable, basic sustainable and non-sustainable were defined. After several decades’ utilizing, the distance was almost one time leaved the sustainable goal. The secondary forest of Mangui Forestry Bureau had begun . (3) By the support of ForStat 2.0, beginning with the real production, to construct the real age series, target age series, regulation period, the upper limit of uncut age series, stable yield restriction, target area error restriction, and total volume restriction at the end of period, each of them determined the structure of that linear programming model. The result of the experimentation in Mangui Forestry Bureau proved that, the cut area and volume dropped by stages, and the preserved volume moved up in conk, as a result, the sustainable forest age structure was reached.

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