古田县马尾松人工林分出材率表的编制

应用古田县近年来伐区调查实际造材数据,以林分平均胸径和平均高为自变量,分别以林分总出材率和规格材出材率为因变量,选择理查德方程建立马尾松人工林分一元和二元材种出材率模型。经拟合结果分析,以林分平均胸径D和平均高H的组合D2H作为自变量,其拟合效果和预估精度要高于只用一个平均胸径或平均高的单因子林分材种出材率模型。并编制了林分一元和二元材种出材率表。

Making Forest Stand Outturn Percentage Table of Pinus massoniana Plantation of Gutian County

Using investigation actual data of Gutian cutting area in recent years, taking forest stand average DBH and average high as independent variables, and forest stand overall outturn percentage and dimension stock outturn percentage as dependent variable, choosing Richard equation, this study established unary and binary outturn percentage model of Pinus massoniana forest stand, results showed, fitting effects and forecast accuracy of outturn percentage model which using forest stand average DBH D and average high H combination of D2H as independent variables were higher than model only using single average DBH or average high. Furthermore, unary and binary outturn percentage table of forest stand has been made.