欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
根据北京山区调查的246块油松人工林固定样地资料,运用理论生长方程,建立了油松人工林林分高和断面积的生长模型,并对其生长过程进行了精度评价及预测检验。结果表明：Compertz、Mitscherlish、Logistic方程拟合油松人工林林分高生长过程时,方程渐近参数受立地指数的影响,将立地指数作为方程自变量时,预测精度最高的是Mitscherlish方程;将立地指数、林分密度指数引入Korf理论生长方程中拟合油松人工林林分断面积生长过程,其模拟精度R2达0.98;对两个模型进行χ2检验,发现观测值和预测值差异不显著,拟合效果良好。研究结果可对北京地区油松人工林的生长动态进行精确预测,为油松人工林的科学经营提供理论依据。
英文摘要：
Growth models of stand height and basal area for Pinus tabulaeformis plantation in Mountainous region of Beijing were established by theoretical growth equations in accordance with data from 246 sample plots.Simulation of stand height by Compertz,Mitscherlish,Logistic equations shows that asymptotic parameters for the equations are impacted by site index.When site index is selected as an independent variable of equations,the prediction accuracy of Mitscherlish equation is the highest.Site index and stand density index are introduced to Korf growth equation to forecast growth process of stand basal area,with a simulation precision of 0.98.Chi-square test of the two models reveals that the actual value is fitted well with the predicted value.The results could be applied to the growth forecast of P.tabulaeformis plantations in Beijing region in order to provide a theoretical basis for the scientific management of P.tabulaeformis plantation.
同期刊论文项目
同项目期刊论文
期刊信息
位置：