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本文以皖南山区中部杉木林90块实测样地为资料,按照数量化理论(Ⅰ)的数学模型,用不带交互项与带交互项的反应表,以定型程序上机电算,分别编成立地质量数量化得分(评定)表。 通过对复相关系数、残差相对值分布及林分达标准年龄时的检验,认为在该地区采用立地质量数量化评定法对杉木丰产林进行宜林地选择、生产力预估及经营管理是可行的。 带交互项模型虽对复相关系数提高甚微,但预测值更接近于实际。梯形得分表便于使用单位根据当地的情况自行选定。
In this paper, 90 plots of Cunninghamia lanceolata in the middle part of southern Anhui mountain are used as data. According to the mathematic model of quantitative theory (Ⅰ), the reaction table without interaction item and interaction item is used. Quality Quantified score (rating) table. Based on the test of the complex correlation coefficient, the distribution of the residual relative value and the standard age of the stand, it is considered that it is feasible to adopt the site quality quantitative assessment method to select the suitable forestland, productivity and management in Chinese fir plantation. . Although the interaction model with the correlation coefficient increased slightly, but the predicted value is closer to the actual. Trapezoidal score table to facilitate the use of units according to the local circumstances of their own choice.