| 生物土壤与生态 |
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| Analysis on Branching Architectures Characteristics of Pinus sylvestris var. mongolica in Different Shelterbelts |
| LI De lu; LIAO Kong tai; YAN Zi zhu; et al. |
| Gansu Key Laboratory of Desertification Combating, Gansu Desert Control Research Institute, Wuwei 733000, Gansu, China |
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Abstract The factors that influence the branching architectures of plants comprise branch length, branching angle at different branching levels, branch-stem ratio, stepwise bifurcation ratio(SBR) and overall bifurcation ratio(OBR), etc. The branching architecture characters of Pinus sylvestris var. mongolica in three different shelterbelt types were researched by using the theory of Branching Architecture. The results indicate that: ①There was very significant variation in branching architectures of Pinus sylvestris var. mongolica among the three shelterbelt types, especially remarkable in branch length and stepwise bifurcation ratio, etc.; ②There was relatively significant variation in branching architectures at different branching levels of Pinus sylvestris var. mongolica among the three shelterbelt types, that is the branches of middle-lower part in typeⅠare dominant, the branches of top-middle part are dominant in typeⅡand type Ⅲ, in addition the branching angle of typeⅠat basal level is larger than the other two types; ③The branch length, branching angle of typeⅡ changed regularly from base to top, all branching architecture parameters of middle and top part are significant than that of the lower part; ④The research results showed that the effect of typeⅡis better, type Ⅲ is middle, and typeⅠis relatively inferior.
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Received: 04 December 2006
Published: 20 January 2008
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2008, Vol. 28 
