辽宁省刺槐人工林立地指数表的编制

Construction of Site Index Chart of Robinia pseudoacacia Plantation in Liaoning Province

应用１５９株刺槐优势木解析木资料，在比较多个树高生长模型基础上，选择Ｒｉｃｈａｒｄｓ生长方程作为辽宁省刺槐优势高生长模型。在分析优势高生长过程特性的基础上，确定基准年龄为１２ａ，立地指数级距为２ｍ，在５～１５ｍ范围内划分为５个指数级，用差分法展开导向曲线编制了单形立地指数表。应用分组整理后解析木资料，拟合出最优多形立地指数模型，并解决了立地指数曲线不过指数点的问题，编制了多形立地指数表。检验结果表明，所编单形与多形立地指数表精度均较高，且以多形立地指数表精度更高，适用性更强，说明了辽宁省刺槐人工林优势高生长多形性的客观性。

In this paper, 159 dominant stem-analysis data of Robinia pseudoacacia were used to construct single-form and polyform site index charts, Richards function was taken for dominant height growth model of Robinia pseudoacacia in Liaoning province On the basis of analysing the characteristics of dominant height growth, 5 index classes were divided out within 5～15 m (standard age was 12 years and site index class distance was 2 m), and single-form site index chart was constructed after derived curve was expanded by difference method The optimum polyform site index model was fitted by means of the adjusted stem-analysis data and the problem that site index curve did not pass the index point was solved, polyform site index chart was constructed The examination results indicated that the accuracy of single-form and polyform site index charts were both high; however, the accuracy of polyform site index chart was higher than that of single-form and the chart was more practical, it showed that dominant height growth was polyformed