Dissertation > Agricultural Sciences > Forestry > Forest management,forest measurement science, forest management > Forest measurement science ( measuring tree learning )

Study on the Tree Volume Table Compilation of Cunninghamia Lanceolota in Kaihua Forest Farm

Author LiLin
Tutor ZhengXiaoXian
School Beijing Forestry University
Course Forest Management
Keywords Standing Volume Table Volume model Theoretical Volume Equation Suitability testing
CLC S758
Type Master's thesis
Year 2011
Downloads 37
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Volume table is one of the most important forest management forestry Table is important to enhance the level of forest management. There are a lot of problems in the use of the current volume table, continue to use the original volume table will lead to considerable error, re-preparing the volume table is one of the urgent work of forestry staff. Technology and methods of preparation of the last volume table takes a lot of resources and manpower, and improve the accuracy of volume table capacity is limited, can not meet the requirements of the management of forest resources at the present stage. And continuously push forward with the reform of China's forestry, forestry management direction toward more intensive development in urgent need of the preparation of the forest management unit within the high-precision forestry List. Kaihua County Forest Chinese fir (Cunninghamia lanceolata) Standing Volume Table in the preparation of different volume table preparation methods and models to compare, summarize draw a set of the most simple and effective methodology for the preparation of the volume. Carried out at the beginning of the study, a summary and analysis of the theory and technology of the preparation of the volume table today. Developed on the basis of the volume table prepared by the pilot program. Under the pilot program, to obtain the the research required 182 fir DBH - tree height - Volume measured data. Study, using different preparation method preferred by the multi-model, the resulting the optimal volume model of the savage forest fir, and prepared accordingly uncivilized forest fir tree volume table. Selected used binary volume equation for comparison, think Yamamoto binary variable parameters volume equation the highest accuracy. In addition, the validation by the research, the conifers theory binary volume equation to meet the accuracy requirements on volume equation also applies to the preparation of the civilized fir Binary Volume Table. In the preparation of a volume table, the sub-tree height curve and direct fitting two ways to set up a standing timber integrable models, precision comparison, the direct use of the logistic derivative model to be able to obtain high-precision volume model. Rhizome volume table for root diameter - the DBH equation and root diameter - Volume equation used for the preparation of the root diameter volume table to select the optimal power function root diameter volume model. Research on the volume table prepared using different methods and different model, while accuracy basis for judging its theoretical basis and biological interpretation of the analysis. Application and verification of the volume equation study has theoretical significance achieved good results, and will be able to improve the accuracy of the volume table to simplify the preparation of volume table. The use of volume models prepared electronic volume calculation program, provides convenience for forestry work.

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