以洛南县油松人工林为研究对象,研究陕西省洛南县油松人工林的合理经营密度,为以后采用合适的抚育作业与经营措施提供理论参考。依据在洛南县油松人工林分布区域布设的标准地资料,用Origin软件对油松胸径与冠幅进行回归关系的拟合;在此基础上,运用半峰宽表达式推算林分不同径阶的理论密度和适宜经营密度,得出洛南县油松人工林冠幅与胸径关系的最优回归模型为:C_D=-0.50669+0.79871×D^0.62976,R²为0.987 38,均方残差为0.017 78;编制出合理经营密度表,得出研究区内油松人工林的密度经营度合理经营区间为(0.52,0.94);最后根据所计算出的数据,编制出适合洛南县油松人工林的经营密度表,可为当地的抚育营林工作提供依据。

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.