天然长白松林林木高产结构的研究

Study on High Production Structure of Nature Pinus Sylvestris. Var. Sylvestrif Orms(Takenouchi)Cheng et.C. D. Chu Forest Tree

以林分树冠投影图为依据，利用数量化理论探讨了天然长白松成熟林林木高产结构．其各因素的高产结构下限指标为：每公顷株数大于６５０株，郁闭度大于０．８，平均胸径大于４１．０ｃｍ。最高产量林木结构指标为：每公顷株数８５０～１０５０株，郁闭度０．８～１．０，平均胸径４１．０～４５．０ｃｍ．

High production structure of nature Pinus sylvestris var sylvestrif orms(Takenouch)Cheng et.C.D. Chu nature forest with quantitative theory based on crown of inquired tree projection drawing of stardingbrest.The high production lower limit of every element is: numbers of per hectare >650,canOpy density>0.8, per D.B.H>41.0cm, The highest production structure elements are: per hectare: 850～1050pear,canopy density:0.8～1.0,per D.B.H:41.0～45.0cm