Effects of thinning on structural complexity of Larix olgensis plantation.
Ying Yong Sheng Tai Xue Bao
; 35(7): 1744-1752, 2024 Jul 18.
Article
in En
| MEDLINE
| ID: mdl-39233402
ABSTRACT
In this paper, we collected the individual tree point cloud data in the plots of Larix olgensis plantations with different thinning intensities in Mengjiagang Forest Farm, applied the fractal analysis theory to extract box dimensions (Db) on MATLAB platform, and characterized the structural complexity of L. olgensis. We assessed the effect of different thinning intensities and tree attributes on the structural complexity of L. olgensis. The results showed significant differences in L. olgensis Db between control (CK 1.68±0.07), low and medium intensity thinning (T1, T2, T3 1.74±0.07), and high intensity thinning (T4 1.81±0.06), which indicated that the thinning intensity increased tree structural complexity. For trunk attribute, the diameter at breast height and tree height was significantly positively correlated with Db, while the height-to-diameter ratio was significantly negatively correlated with Db. For canopy attribute, crown volume, surface area, projected area, and crown diameter was significantly positively correlated with Db. Hegyi competition index was significantly negatively correlated with Db in the control and low-moderate-intensity thinning treatments, but not significantly correlated with Db in the high-intensity thinning treatment. It indicated that thinning influenced L. olgensis structural complexity, with trunk attribute and canopy attribute as the main drivers of L. olgensis structural complexity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Forestry
/
Larix
Country/Region as subject:
Asia
Language:
En
Journal:
Ying Yong Sheng Tai Xue Bao
Journal subject:
SAUDE AMBIENTAL
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: