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[Growth analysis on the competition-density effect in Cunninghamia lanceolata stands]
1College of Forestry, South China Agricultural University, Guangzhou 510642.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|January 5, 2002
Summary
This study analyzes the competition-density effect in Cunninghamia lanceolata stands, revealing how stand density and biological time influence growth dynamics and stem volume over time.
Area of Science:
- Forestry science
- Ecology
- Plant physiology
Context:
- The competition-density (C-D) effect is crucial for understanding forest stand dynamics.
- Cunninghamia lanceolata (China fir) is an important timber species.
Purpose:
- To analyze the competition-density effect in Cunninghamia lanceolata stands using a reciprocal equation.
- To investigate the relationship between stand density, biological time, and growth coefficients.
Summary:
- The study employed the reciprocal equation 1/omega = A rho + B to model the C-D effect, where omega is mean stem volume and rho is density.
- Biological time (tau) increased with physical time (t), influencing growth coefficients.
- Coefficient A initially increased and then decreased with biological time, while coefficient B decreased exponentially towards zero. Growth coefficient lambda(t) decreased with stand age.
Impact:
- Provides insights into the self-thinning process and stand development in Cunninghamia lanceolata.
- Offers a quantitative model for predicting stand density and volume relationships over time.
- Contributes to sustainable forest management practices for this species.