黄山松单木竞争分析及模型建立  

Study on individual tree competition analysis and development model of the Pinus taiwanensis

作　　者：华伟平[1] 丘甜 江希钿[2] 盖新敏 黄烺增 

机构地区：[1]武夷学院,福建武夷山354300 [2]福建农林大学林学院,福建福州350002 [3]宁德市林业局,福建宁德352100

出　　处：《森林与环境学报》2017年第2期201-206,共6页Journal of Forest and Environment

基　　金：福建省自然科学基金项目(B0010019);南平市科技计划项目(N2014Z01)

摘　　要：以黄山松为研究对象,确定了378棵对象木,并利用固定半径法确定了黄山松对象木与竞争木的样圆半径为7.5 m,通过计算与距离有关的竞争强度,得到不同立地质量等级下对象木平均竞争强度。通过对10个备选方程拟合对比,选取拟合效果较好的倒数方程作为描述对象木胸径与平均竞争强度的关系,构建了与立地质量有关的竞争强度模型,即CI=f_a(I_1,I_2,I_3,I_4)+f_a(I_1,I_2,I_3,I_4)/D。经拟合并检验,相关指数为0.932,平均相对误差绝对值7.4%,平均系统误差1.1%,说明拟合效果较好,可用于描述不同立地质量等级下黄山松林分竞争强度。The paper identified 378 object trees by taking Pinus taiwanensis Hayata as the research object,used the fixed radius method to detemiine that the radius of circle sample of the object tree and competitive tree was 7.5 m,and got the average competitive intensity under various site quality levels by calculating the competitive intensity associated with distance. By fitting the 10 alternative equations,the competitive intensity relationship w-as built related to site quality w-hich was correlation index was 0.932, absolute relative error absolute value was 7.4%,average system error was 1.1%. These suggested the model was fitted better to be used to describe the competitive intensity of natural P. taiwanensis under different site quality grade.

关 键 词：黄山松 单木竞争 立地质量 哑变量 竞争模型 

分 类 号：S758.58[农业科学—森林经理学]