新疆农业大学学报2025，Vol.48Issue(2)：104-110,7.DOI:10.20088/j.cnki.jxau.2025.02.003
新疆天山云杉林土壤容重空间分布特征及影响因素分析
Analysis of Spatial Distribution Characteristics and Influencing Factors of Soil Bulk Density in a Picea schrenkiana var.Tian-schanica Forest in Xinjiang
摘要
Abstract
This study aims to characterize the spatial distribution of soil bulk density(BD)across soil layers in Picea Schrenkiana var.Tianschanica and identify its driving factors.The research was conducted at the Teaching and Internship Forest Farm of Xinjiang Agricultural University.The spatial distribution characteristics of soil bulk density in different soil layers of the study area and its main influencing factors were studied by using de-scriptive statistics,Pearson correlation analysis,statistical methods,and structural equation model analysis.The results indicated that the mean BD in the 0-20 cm and 20-60 cm layers were 0.668 and 0.890 g/cm3,respec-tively.The exponential model best fitted the 0-20 cm layer,while the Gaussian model best fitted the 20-60 cm layer;both models showed strong spatial autocorrelation.BD in the 0-20 cm layer displayed an alternating mo-saic of high and low values,while in the 20-60 cm layer,BD was generally lower in the western region and higher in the eastern region.In the 0-20 cm layer,BD was strongly negatively correlated with soil water content(P<0.01),and significantly negatively correlated with organic carbon,alkali-hydrolyzable N,and total N(P<0.05),and significantly positively correlated with pH(P<0.05).In the 20-60 cm layer,BD was strongly posi-tively correlated with elevation and total N(P<0.01),and strongly negatively correlated with soil organic car-bon and water content(P<0.01).BD in the 0-20 cm layer was primarily governed by soil factors,while in the 20-60 cm layer,both soil and topographic factors played a significant role.Path analysis using SEM showed that in the 0-20 cm layer,pH,total N,alkali-hydrolyzable N,soil organic carbon,and water content together ex-plained 31.9%of the variance in BD,while in the 20-60 cm layer,elevation,slope position,total N,available P,soil organic carbon,and water content together explained 87.5%of the variance.The spatial variability of soil bulk density in the study area was dominated by structural factors,and its soil bulk density was mainly controlled by water content,altitude,organic carbon,total nitrogen and other factors.关键词
土壤容重/空间分布/影响因素/天山云杉林Key words
soil bulk density/spatial distribution/influencing factors/Picea Schrenkiana var.Tianschanica分类
农业科技引用本文复制引用
黄选胜,王卫霞,董子炜,杨永亮,孙玉博,高坤,洪文彤,王博远,楚哈·加那提,迪丽拜尔·阿不都热西提..新疆天山云杉林土壤容重空间分布特征及影响因素分析[J].新疆农业大学学报,2025,48(2):104-110,7.基金项目
国家级大学生创新创业训练计划项目(202510758009) （202510758009）
新疆维吾尔自治区天山西部国有林管理局2024年特克斯分局国有林综合生态修复项目(生态监测)项目(XJXS-2024-025) （生态监测）
