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한국생태학회 / v.27, no.1, 2004년, pp.27-33 
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( Relationship between Maximum Stem Volume and Density during a Course of Self-thinning in a Cryptomeria japonica Plantation ) |
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| 초 록 |
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| Cryptomeria japonica plantation was monitored every year during 15 years from 1983 to 1997 for stem diameter and volume. The reciprocal equation, 1/Y = A + B/N, was applied to the relationship between cumulative volume Y and cumulative number N from the largest tree in the stand each year. The parameters A and B, which means respectively the reciprocal of an asymptotic value of total stand stem volume and the reciprocal of the maximum stem volume, are related by a power function. The power functional relationship between A and B derived a linear relationship of B-points ( $N_{B}$, $V_{B}$; $N_{B}$ = B/A, $Y_{B}$ = 1/2A) of each Y-N curve on log-log coordinates. The gradient of B-point line was so steep that the Y-N curve moved parallel upward year by year. The time trajectory of mean stem volume (W) and density ($
ho$) provided evidence in favor of the 3/2 power law of self-thinning, because the gradient of W - $
ho$ trajectory on log-log coordinates approximated to -3/2 at the final stage of stand development. On the basis of the results of Y-N curves and W - $
ho$ trajectory, the time trajectory of maximum stem volume $W_{max obs}$ and $
ho$ was derived theoretically. The gradient of $W_{max obs}$ - $
ho$ trajectory on log-log coordinates is calculated to be -0.6105 at the final stage. The gradient of $W_{max obs}$ - $
ho$ trajectory was steeper than that of W - $
ho$ trajectory at the early stage, while the former is gentler than the latter at the later stage.stage.e.age.e. |
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| 키워드 |
| Cryptomeria japonica;Density;Maximum stem volume;Mean stem volume;3/2 power law of self-thinning;Y-N curve; |
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The Korean Journal of Ecology / v.27, no.1, 2004년, pp.27-33
한국생태학회
ISSN : 1225-0317
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922290515)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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