山杨、桦树地径与直径相关关系的研究  

RELATIONSHIP BETWEEN DIAMETER AND DIAMETER AT BUTT END OF Populus davidiana AND Betulu platyphylla

作　　者：赵海珍[1] 郑辉[1] 陈东来[1] 孟庆潭 

机构地区：[1]河北农业大学林学院,保定071000 [2]唐山市林业局,唐山063000

出　　处：《河北林果研究》2001年第1期14-16,共3页Hebei Journal of Forestry and Orchard Research

摘　　要：利用 10块山杨、桦树 (简称杨桦 )天然混交次生林标准地的实测资料 ,对两树种地径与直径的关系进行了研究 ,并建立了相应的线性模型 ,其相关系数均在 0 99以上 ,拟合效果良好 。The relationship of diameter and diameter at butt end was studied with the data of ten plots of Populus davidiana-Betulu platyphylla secondary mixed forests.It could be characterized by a linear model, y=a+bx. All correlation-coefficient were above 0 99.The results provided references for research and production.

关 键 词：山杨 桦树 地径 相关关系 直径 线性模型 相关关系 混交林 森林资源保护 

分 类 号：S758.5[农业科学—森林经理学]