文献类型：期刊文献

英文题名：A Structural Equation Model Suggests That Soil Physical Properties Had the Greatest Negative Influence on the Competition Index of Dominant Trees of Pinus sylvestris var. Mongolia

作者：Zhang, Jiapeng[1,2] Jia, Zhiqing[1,2] Li, Qingxue[2,3] He, Lingxianzi[2,3] Gao, Ya[1,2] Wang, Long[1,2] Han, Dong[1,2]

第一作者：Zhang, Jiapeng;张俊佩

通信作者：Jia, ZQ[1];Jia, ZQ[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Qinghai Gonghe Desert Ecosyst & Res Stn, Gonghe 813005, Peoples R China;[3]Chinese Acad Forestry Sci, Inst Ecol Protect & Restorat, Beijing 100091, Peoples R China

年份：2023

卷号：14

期号：6

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001014625200001)】；

语种：英文

外文关键词：Pinus sylvestris var; mongolica plantation; dominant tree; intraspecies competition; site conditions; SEM

摘要：This study was conducted in a Pinus sylvestris var. Mongolia plantation within the Xiaotaojiagou watershed of the Winter Olympic venues (Chongli competition area) to explore the influence of forest growth factors, soil physical properties, soil nutrients, and other factors on the competition index (CI) of dominant trees in the plantation. A 20 m x 20 m sample square was established every 300 m, and a total of 20 plots were set. The Hegyi single-tree competition index model and structural equation model (SEM) were used to analyze the dominant tree CI and its association with the forest growth factor, soil nutrient content, and soil physical properties. The CI of Pinus sylvestris var. Mongolia showed a decreasing trend with increases in the forest growth factor, the soil nutrient content, and the soil physical properties. Soil physical properties had the greatest influence on the CI, with a significant negative correlation (p < 0.05) and a total effect of -0.91. The results indicate that the competition index of dominant trees is sensitive to changes in soil physical and chemical properties as well as growth indicators such as diameter at breast height, tree height, and crown width of Pinus sylvestris var. mongolica.