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- W2390197757 abstract "【Objective】 The study was done in order to compare the adaption of the five tree competition models,including one Hegyi's competition index(CI) and four Bella's CIs.【Method】 One plot representing near-natural conifer and broadleaved mixed forest,sized 40 m×50 m,was established and surveyed in Jingouling forest farm,Wangqing forest bureau,Jilin province.A regression model was formed with the basal area increment in five years as the dependant variable and the CIs as the independent variables.The dependent coefficient of the model was taken as the criterion to assess the models.【Result】 The basal area of four tree species Abies nephrolepi,Picea koraiensis,Pinus koraiensis and Tilia amurensis amounted to more than 80% of the total basal area in the plot.So they were selected as the target species for the research.As for Tilia amurensis and Pinus koraiensis,the model B_1 was the most suitable,but for Picea koraiensis and Abies nephrolepi these models did not demonstrate similar trend.【Conclusion】 The competition models demonstrated different adaption among these tree species,showing that the competition model with one variable could not fully demonstrate the competition relationship for mixed forest and more work on the competition models is necessary." @default.
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- W2390197757 date "2012-01-01" @default.
- W2390197757 modified "2023-09-26" @default.
- W2390197757 title "Comparison of 5 tree competition index models." @default.
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