摘要
【研究目的】本研究旨在揭示亚热带山地丘陵区土壤容重的空间分异特征及其驱动机制,以江西省全南县为核心研究区结合福建省南平市和安徽省岳西县的对比数据,为区域土壤资源管理与可持续利用提供科学依据。【研究方法】采用地统计学方法分析土壤容重的空间分布格局,并运用主成分分析方法识别其关键驱动因素。研究区涵盖全南县、南平市和岳西县,系统采集表层土壤样本,结合自然本底(如纬度、气温)和人类活动(如土壤类型、土地利用类型)等多维度数据进行综合分析。【研究结果】(1)全南县表层土壤容重平均值为1.22 g/cm^(3),低于全国平均水平但高于南平市(1.09 g/cm^(3)),而岳西县土壤容重平均值最高(1.41 g/cm^(3)),空间上呈现明显的“西北高、东南低”分布格局;(2)主成分分析显示,自然本底格局(纬度、气温等)和人类活动干扰(土壤类型、土地利用类型等)是影响土壤容重空间分异的主要驱动因素,共同解释了67.08%的容重变异;(3)不同土壤类型和土地利用方式下的容重存在显著差异,有机质含量较高的泥质红壤和水田等具有相对较低的容重值;(4)土壤有机质含量和社会经济水平分别作为独立主成分,是影响容重的重要驱动因子。【结论】亚热带山地丘陵区土壤容重空间分异受自然本底和人类活动共同驱动。
[Objective]This study aims to investigate the spatial variability of soil bulk density and its driving mechanisms in a subtropical hilly and mountainous region.Using Quannan County,Jiangxi province as the core study area,and incorporating comparative data from Nanping City,Fujian Province and Yuexi County,Anhui province,the research seeks to provide a scientific basis for regional soil resource management and sustainable land use.[Methods]Geostatistical methods were employed to analyze the spatial distribution patterns of soil bulk density,while principal component analysis was applied to identify its key driving factors.The study area encompasses Quannan County,Nanping City,and Yuexi County.Surface soil samples were systematically collected and analyzed in conjunction with a multidimensional dataset incorporating natural baseline factors(e.g.,slope aspect,temperature)and human activity indicators(e.g.,soil type,land use patterns).(1)The surface soil bulk density was low in the southwest and high in the southeast of Quannan County,showing an increasing spatial distribution pattern from west to east.(2)The mean surface soil bulk density of grassland was significantly higher than that of garden,forest and dry land,and the mean surface soil bulk density of paddy field showed a low value due to the higher soil organic matter content in the study area.(3)In the study area,surface soil bulk density first decreases and then increases with increasing altitude.(4)The relationship between soil type and surface bulk density showed that yellowish red soil had the highest bulk density,followed by brown lime soil,typical red soil,aquifer paddy soil,and lime-tidal soil,which had the lowest bulk density.[Conclusion]In conclusion,the spatial variation of soil bulk density in subtropical hilly and mountainous areas is jointly driven by natural background conditions and human activities.
作者
周钊
蒋婷
罗敏玄
杨涵涵
傅梓奇
黄奔
黄明
ZHOU Zhao;JIANG Ting;LUO Minxuan;YANG Hanhan;FU Ziqi;HUANG Ben;HUANG Ming(Changsha,Natural Resources Comprehensive Investigation Center,China Geological Survey,Changsha 410625,China;Jiangxi Bureau of Geology and Mineral Resources Fifth Geological Team,Xinyu Jiangxi 338000,China)
出处
《华北地质》
2025年第3期118-131,共14页
North China Geology
基金
中国地质调查项目“大别山区东段生态修复综合调查(DD20242416)”
“南平市典型红壤区地表基质调查(DD20220865)”
“洞庭湖平原东部典型河湖交错区地表基质调查(DD20240100808)”。
关键词
亚热带山地丘陵区
土壤表层容重
空间分异
驱动机制
地统计学
subtropical hilly and mountainous region
surface soil bulk density
spatial heterogeneity
driving mechanisms
geostatistics
