中条山栓皮栎材种出材率表的编制与应用

Construction and Application of the Assortment Outturn Table for Quercus variabilis Stands in Zhongtiao Forest Region

根据中条山森林经营局当地市场情况，将栓皮栎材种分为规格材、非规格材和薪材废材三类，编制了材种出材率表，采用理查德方程和二次多项式分别拟合规格材出材率、薪材废材出材率与胸径的关系，相关系数分别为０．９４４８和０．９４１６，并用“１００％－规格材出材率－薪材废材出材率”获得非规格材出材率。

Based on the timber market situation,the merchantable timber for Quercus variabilis is divided into three types:standard timber,non standard timber and firewood waster The Richards equation is chosen to predict the outturn of standard timber from d b h ,and the quadratic multinomial to firewood waster Their correlatoin coefficients are respectively 0 944 8 and 0 941 6 And then the outturn of non standard timber is got from total volume and above two types outturns The table has been used for local forest management