关键词: 油松, 人工林, 冠幅重叠系数, 合理经营密度, 密度经营度, 森林间伐及抚育

Abstract:

This paper takes pinus tabulaeformis plantation in Luonan County as the research object,studies the reasonable management density of pinus tabulaeformis plantation in Luonan County of Shaanxi Province,and provides theoretical reference for the adoption of appropriate tending operation and management measures in the future.Based on the data of standard plots in the distribution area of pinus tabulaeformis plantation in Luonan County,the regression relationship between DBH (diameterat breast height) and crown width of pinus tabulaeformis was fitted by Origin software.On this basis,the theoretical density and suitable management density of different diameter grades were calculated by the expression of half-peak width.The optimal regression model of the relationship between crown width and DBH of Pinus tabulaeformis Plantation in Luonan County is:C_D=-0.50669+0.79871×D^0.62976,R² is 0.987 38,mean square residual is 0.017 78;and the table of reasonable management density is worked out,and the reasonable management range of density management degree of Pinus tabulaeformis Plantation in the study area is(0.52,0.94).Finally,according to the data calculated,the management density table suitable for Pinus tabulaeformis Plantation in Luonan County is worked out,which provides the basis for local forest management.

Key words: Pinus tabulaeformis, plantation, crown overlap coefficient, reasonable management density, forest density management