According to field investigation data,the intraspecific competition and interspecific competition of Pinus koraiensis in broad-leaved Korean pine mixed forest in Changbai Mountains were studied by using Hegyi’s compe...According to field investigation data,the intraspecific competition and interspecific competition of Pinus koraiensis in broad-leaved Korean pine mixed forest in Changbai Mountains were studied by using Hegyi’s competition index model for individual tree.The results showed that intraspecific competition intensity of Pinus koraiensis reduced with increase of diameter scale of trees.The order of competition intensity is:Pinus koraiensis-Fraxinus mandshurica>Pinus koraiensis-Quercus mongolica>Pinus koraiensis-Pinus koraiensis>Pinus koraiensis-Tilia amurensis>Pinus koraiensis-Acer mono>Pinus koraiensis-Tilia mandshurica>Pinus koraiensis-Acer mandshurica.The relationship between competition intensity and individual size of objective tree follows closely the equation CI =AD-B.Based on the relationship,competition intensity in the forest is simulated.At the same time,some conclusions and suggestions are proposed.It is proved that Hegyi′s competition model for individual tree can provide quantitative index for study on intraspecific and interspecific relationship in plant population ecology.展开更多
Hegyi’s competition index model for individual tree was introduced to study intraspecific and interspecific competition for dominant population of evergreen broad\|leaved forest in Bijia Mountain of Longyan, Fujian. ...Hegyi’s competition index model for individual tree was introduced to study intraspecific and interspecific competition for dominant population of evergreen broad\|leaved forest in Bijia Mountain of Longyan, Fujian. The results show that the competition is more intense in intraspecies than in interspecies, which indicated indirectly that the horizontal spatial pattern of dominant populations conform to aggregated distribution. There existed difference in interspecific competitions, and the competitions can be divided into four groups according to the competition index. Relationship between the competition index and the base diameter of objective tree conformed closely to power function, and competition intensity reduced with the growth in base diameter of objective tree.展开更多
文摘According to field investigation data,the intraspecific competition and interspecific competition of Pinus koraiensis in broad-leaved Korean pine mixed forest in Changbai Mountains were studied by using Hegyi’s competition index model for individual tree.The results showed that intraspecific competition intensity of Pinus koraiensis reduced with increase of diameter scale of trees.The order of competition intensity is:Pinus koraiensis-Fraxinus mandshurica>Pinus koraiensis-Quercus mongolica>Pinus koraiensis-Pinus koraiensis>Pinus koraiensis-Tilia amurensis>Pinus koraiensis-Acer mono>Pinus koraiensis-Tilia mandshurica>Pinus koraiensis-Acer mandshurica.The relationship between competition intensity and individual size of objective tree follows closely the equation CI =AD-B.Based on the relationship,competition intensity in the forest is simulated.At the same time,some conclusions and suggestions are proposed.It is proved that Hegyi′s competition model for individual tree can provide quantitative index for study on intraspecific and interspecific relationship in plant population ecology.
文摘Hegyi’s competition index model for individual tree was introduced to study intraspecific and interspecific competition for dominant population of evergreen broad\|leaved forest in Bijia Mountain of Longyan, Fujian. The results show that the competition is more intense in intraspecies than in interspecies, which indicated indirectly that the horizontal spatial pattern of dominant populations conform to aggregated distribution. There existed difference in interspecific competitions, and the competitions can be divided into four groups according to the competition index. Relationship between the competition index and the base diameter of objective tree conformed closely to power function, and competition intensity reduced with the growth in base diameter of objective tree.
