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基于福建省福建柏主产区72株优势木的解析数据,按照地位指数(SI)与林分优势高(H)均能表示为年龄(T)显示表达式的原则,构建多形地位指数模型,保证基准年龄时优势高与地位指数的一致性。得到多形地位指数曲线模型的2种表达形式:H=1/((0.035305+0.044454/SI)×(1-20/T)+(1.988836+35.49874/SI)×(1/T2-1/20/T)+(20/SI/T)),SI=(0.044454×(1-20/T)+35.49874×(1/T2-1/20/T)+20/T)/(1/H-0.035305×(1-20/T)-1.988836×(1/T2-1/20/T))。经检验,所拟合的模型精度高,具有实用价值,可在林业生产上用于评价福建柏人工林的生产力。
Based on the analytical data of 72 dominant woods in the main producing areas of Bojian, Fujian, Fujian Province, both the status index (SI) and stand superiority (H) can be expressed as the expression of age (T), and the polymorphic status index model , To ensure that the superiority of the benchmark age is consistent with the status index. Two kinds of expressions of the polymorphic index curve model were obtained: H = 1 / (0.035305 + 0.044454 / SI) × (1-20 / T) + (1.988836 + 35.49874 / SI) × (1 / T2-1 / 20 /T)+(20/SI/T)),SI=(0.044454×(1-20/T)+35.49874×(1/T2-1/20/T)+20/T)/(1/H-) 0.035305 × (1-20 / T) -1.988836 × (1 / T2-1 / 20 / T)). After testing, the fitted model has high precision and practical value, and can be used for evaluating the productivity of Fokienia hodginsii plantation in forestry production.