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| Research on tree architecture of Populus xiaozhuanica in shelterbelts with pipe model theory |
| Chen Jun1,Li Chunping1,Guan Wenbin1,Liu Yanhui1,Zhang Nannan1,Fan Zhiping2 |
1.Key Laboratory of Soil and Water Conservation and Desertification Combating of Ministry of Education,College of Soil and Water
Conservation,Beijing Forestry University,100083,Beijing;2.Institute of Applied Ecology,Chinese Academy of Sciences,110016,Shenyang:China |
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Abstract Applying the pipe model theory,tree architecture characteristics of Populus xiaozhuanica is（described）.It is a linear relation between the increasing of trunk biomass and descending of height.It is also a linear relation between leaf biomass and branch biomass that can't be affected by different way of dividing layers.And same relation exists（between） accumulated leaf biomass,branch and trunk biomass.The highest correlation coefficients were found between accumulated biomass and biomass per unit trunk.It is an exponent relation（between） accumulated trunk biomass and biomass per unit trunk,the value of exponent is from 1.1 to 1.3.（Relation） between sapwood area and total branch basal area is linear above breast-height.The pipe model for individual trees of Populus xiaozhuanica was made.Relation between diameter at breast height(D1.3) and（diameter） of heartwood（Dx） is documented: Dx=0.522exp(0.1698D1.3),r=0.9848.
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Received: 28 November 2005
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