尤溪国有林场杉木人工林林分材种出材率表的编制

Working out Cunninghamia lanceolata Plantation Stand Species Outturn Percentage Table of Youxi National Forest Farm

采用尤溪国有林场近年来伐区调查设计资料,选择杉木林分平均胸径和平均高为辅助因子,应用多方程分析对比法研制杉木人工林林分一元和二元材种出材率表。结果表明,林分材种出材率与平均胸径D及D2H之间的关系,以Y=aeb/x方程效果最佳,但规格材的拟合效果不如总出材率;采用平均胸径和平均高2个因子编制的林分二元材种出材率表,精度要高于只用平均胸径1个因子的林分一元材种出材率表。所编数表简便实用,在森林资源调查中有应用价值。

Cunninghamia lanceolata plantation stand one-dimensional and binary volume species outturn percentage table by taking design and investigation datas in Youxi National Forest Farm in recent years,and Cunninghamia lanceolata average dbh and height as assistant factor,the results showed Y=aeb/x equation effect was best for the relation between D and D2H,but the simulization effect of standard timber was worse than that of total outturn percentage;the precision of stand binary volume species oututrn percentage table worked out by average dbh and height was higher than that of stand one-dimensional species outturn percentage table worked out by only average dbh.The simple and practical table owned the application value in the forest resource investigation.