摘要
:通过对 4种竞争指标的比较筛选 ,以Hegyi单木竞争指标模型对天然更新的檫木林种内和种间竞争强度进行了定量分析 ,结果表明 :檫木种内竞争强度随胸径增大而逐渐减小 ;种间竞争强度大于种内竞争强度 ;竞争强度与檫木胸径之间存在显著的双曲线非线性回归关系。天然更新檫木林竞争规律的研究不仅具有生态学价值 。
A selected competition index was used to describe the law of competition in naturally regenerated Sassafras tzumu forest. The results showed that the intraspecific competition intensity of the trees reduced with the increase in diameter class and the interspecific competition was more intensive than intraspecific competition. A remarkable regression relationship between competition index and diameter class of the trees were established and used to predict the competition intensity.
出处
《江西农业大学学报》
CAS
CSCD
2001年第2期240-243,共4页
Acta Agriculturae Universitatis Jiangxiensis
关键词
檫木
种内竞争
种间竞争
竞争强度
竞争指标
天然更新林
Sassafras tzumu
intraspecific competition
interspecific competition
competition intensity
competition index
