【摘要】 编制山东省“欧美107杨”（Populus×euramericana‘Neva’）人工林单形和多形地位指数表，以期为该区域杨树人工林质量优化提供基础数表参考。本文利用山东省15地市的93株平均优势木解析木数据获得了706对树高—年龄数据，选择Richards函数作为树高导向曲线，根据各龄阶树高变动系数确定基准年龄，采用差分法展开导线曲线得到单形和多形指数曲线模型，通过Marquardt迭代法进行参数估计，将指数级和各龄阶分别代入单形和多形指数曲线模型，得到山东省“欧美107杨”人工林单形和多形地位指数表，使用成对T检验法及与真值差一级个数比例■对编制的地位指数表的适用性进行检验。结果表明：（1)Richards函数拟合的决定系数为0.878，相对总误差为0.17%，作为树高导向曲线拟合度较好；（2）确定基准年龄为8a，指数级距为2 m，龄阶距为1a,7个指数级（10～22);(3）编制的单形和多形地位指数表均通过适用性检验，两者的■值分别为87.05%和89.21%，多形地位指数表的预测精度高于单形地位指数表。基于差分法编制的“欧美107杨”人工林单形和多形地位指数表均能客观地评价山东省“欧美107杨”人工林立地质量。更多还原

【Abstract】 This study develops anamorphic and polymorphic site index tables for the Populus×euramericana’Neva’plantation in Shandong Province,aiming to provide a foundational reference for optimizing the quality of poplar plantations in this region.Using 93 analytic and average dominant trees (providing 706 height-age pairs) collected across 15 cities in Shandong Province,selecting the Richards function as the height guide curve,this study determines the reference age based on coefficients of variation in tree height for each age class,and applies the difference method to develop the guide curve,resulting in both anamorphic and polymorphic site index curve models.It estimates parameters using the Marquardt iterative method,and applies height data for the exponential function and each age class to the respective single form and polymorphic index curve models.Consequently,it creates the anamorphic and polymorphic site index tables for Populus euramericana plantations in Shandong province,the applicability of which is evaluated using the paired T-test and ■.The results show that (1) The Richards function demonstrates a good fit as a tree height guide curve,with a coefficient of determination of 0.878 and a relative total error of 0.17%;(2) The reference age is determined to be 8 years,with an exponential class interval of 2 meters and an age class interval of 1 year,comprising 7 exponential classes (10 to 22);(3) Both anamorphic and polymorphic site index tables pass the applicability test,with ■ values of 81.03%and 89.21%,respectively,and the forecast accuracy of the polymorphic site index table is higher than that of the anamorphic site index table.Both anamorphic and polymorphic site index tables for Populus euramericana plantation based on the difference approach can objectively assess the site quality of these plantations in Shandong Province.更多还原