摘要
为探究木荷混交林林木之间的竞争规律,预测优势树种未来的演替和生长趋势,以大熊山国家森林公园内木荷混交林为例,采用基于交角的竞争指数计算木荷混交林的种内和种间竞争指数,并分析其中的竞争机制。结果表明:(1)大熊山国家森林公园木荷混交林中杉木和马尾松是木荷的主要竞争树种;(2)木荷混交林的种内竞争总体上强于种间竞争,这与该混交林属于块状混交有关;(3)随着龄组的增长,木荷混交林的竞争处于下降趋势,究其原因为该林分的林木总数在“自然稀疏”的作用下不断降低,不同树种的树高差异越来越小,导致侧方挤压和上方遮盖对对象木的影响逐渐减小。
In order to explore the competition rules among Schima superba mixed forest trees and predict the future succession and growth trend of dominant tree species, taking Daxiongshan National Forest Park as an example, the competition index based on the angle of intersection is used to calculate the intraspecific and interspecific competition index of the mixed forest of Schima superba and to analyze its competitive mechanism. The result shows:(1)Chinese fir and Pinus massoniana are the main competitive species of Schima superba in the Schima superba mixed forest of Daxiongshan National Forest Park;(2)the intraspecific competition of Schima superba mixed forest is generally stronger than that of interspecific competition, which is related to the fact that the mixed forest belongs to block mixing;(3)with the growth of age group, the competition of Schima superba mixed forest is in a downward trend, the reason is that the total number of trees in the forest is decreasing constantly under the effect of "naturally thinning", and the height differences of different trees species are getting smaller and smaller, leading to the gradual reduction of the impact of lateral extrusion and upper covering on the target trees.
作者
彭玺
PENG Xi(Central South Inventory and Planning Institute of National Forestry and Grassland Administration,Changsha 410014,Hunan,China)
出处
《中南林业调查规划》
2022年第3期55-60,共6页
Central South Forest Inventory and Planning
关键词
种内
种间
竞争
木荷
混交林
intraspecific
interspecific
competition
Schima superba
mixed forest
