Analys Of The Relationship Between The Korean Pine Volume,DBH And HCB

This paper mainly studies the Pinus koraiensis in the Liangshui Nature Reserve,to investigate the volume algorithm of Korean pine. According to the actual situation in the region, we selected 50 plots as the research object. We selected 653 Natural Korean pine tree and field measurements of their diameter at breast height, under branch height and volume. Then use the data processing software such as SPSS 17.0 and EXCEL.This paper first analyzes the volume(V) and diameter at breast height (DBH), height under branch(HCB), width(CW) correlation between the four factor. The decisive coefficient R2 and 1 degree evaluation to the most significant correlation with the volume of the DBH and height under branch.1、A finite element model of the volume of Pinue koraiensisThe diameter at breast height as the independent variable, the volume as the dependent variable, with 6 kinds of common curve model has been one of th e most outstanding equation V=0.223-0.33D+0.002D2-(3.551E-7)D32、The two element model of Pinus koraiensis volumeThe DBH and height under branch as the independent variable, the volume as the dependent variable, with 6 kinds of common curve model,the optimal equation through the correlation index of the size of R2V=0.525-0.034D-0.083H+0.00D2+0.008H2-0.00006012D2H+0.00001376D3According to the optimal model, in accordance with the requirements of the tree volume table, we work out single entry volume table and general volume table. Finally, tested by 10 sample data. Refer to the above repectively single entry volume table and general volume then calculate the average relative error. The analysis results show that the relative error is less than general volume table of single entry volume table. General volume table estimation precision is higher than single entry volume table,The two error is less than 5% to meet the accuracy requirements of forestry production volume estimation.Provide a theoretical basis for more trees in this paper as cold water area measurement of Korean pine.