| MODELS FOR CROWN STRUCTURE OF LARCH PLANTATION |
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| 作者姓名： | 李凤日 刘兆刚 孙金宝 |
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| 作者单位： | Li Fengri;Liu Zhaogang(Northeast Forestry University，Harbin 150040，P. R. China)Sun Jingbo(Forestry Bureau of Heilongjiang Province) |
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| 摘 要： | INTRODUCTIONToreflecttree'sgrowthactivityandcompetitioneffectsoftree'sdevelopment,someofcrownvariablescanbeusedtode-velopcompetitionindexes(Mitchelll975,BigingandWensell99O,BigingandDobbertin,l992).Thecrownsizedirectlyinfluencestree'sassimilationanditisoneofthebasicvariableforpredictingincrementoftree.TherefOre,inmanygrowthandyieldmod-els,treecrowndimensionsareoftenusedasanimportantcomponent.Crownvariablesintroducedingrowthmodelsasameanstoimprovethepredictiveabilityandaccuracyoftreeors…
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Models for crown structure of larch plantation |
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| Li Fengri,Liu Zhaogang,Sun Jingbo.MODELS FOR CROWN STRUCTURE OF LARCH PLANTATION[J].Journal of Forestry Research,1995,6(1):6-11. |
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| Authors: | Li Fengri Liu Zhaogang Sun Jingbo |
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| Institution: | (1) Northeast Forestry University, 150040 Harbin, P. R. China;(2) Forestry Bureau of Heilongjiang Province, P. R. China |
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| Abstract: | Based on the temporary plots of circle clear cutting for larch (Larix olgensis Henry) plantation, the tree and stand crown structure were studied by using the approach of branch analysis for each tree of the plot. the results of this work indicated that in stand the tree crown form is as same as different tree size (DBH and H). So the tree's crown structure can be characterized by using averaged crown taper of the stand. Therefore, the different stand conditions are correlated with stand age, site index and stand density. Estimation models of stand crown structure are developed by regression and the model can be used to develop the stand growth and management models. |
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| Keywords: | Larix olgensis Branch analysis method Crown structure Crown taper |
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