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天津师范大学学报（自然科学版） >

2026 , Vol. 46 >Issue 2: 35 - 44

DOI: https://doi.org/10.19638/j.issn1671-1114.20260205

地理与环境科学

环渤海地区土壤有机碳密度的空间格局及影响因素

  • 周明 ,
  • 王义东 ,
  • 郭长城
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  • 1.天津市水资源与水环境重点实验室,天津师范大学,天津 300387;
    2.天津师范大学地理学部,天津 300387
周明（2000—）,女,硕士研究生.
王义东（1982—）,男,研究员,主要从事水土环境碳循环及其地理空间分异规律方面的研究. E-mail:wangyidong@tjnu.edu.cn.

收稿日期: 2024-11-18

  网络出版日期: 2026-06-03

基金资助

国家自然科学基金资助项目（42571059）

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Spatial pattern and influencing factors of soil organic carbon density in Bohai Rim region

  • ZHOU Ming ,
  • WANG Yidong ,
  • GUO Changcheng
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  • 1. Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China;
    2. Geography Department, Tianjin Normal University, Tianjin 300387, China

Received date: 2024-11-18

  Online published: 2026-06-03

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摘要

为探明有机碳密度的空间分异规律及其影响机理,以环渤海地区为研究区域,基于 SoilGrids250 m、HWSD、WISE30sec 和 GSDE 土壤数据集,利用 ArcGIS 技术分析土壤有机碳密度和储量的空间分布特征,通过相关性分析和随机森林法探究土壤理化性质、气候和地形因子对土壤有机碳密度的影响. 结果表明:① 环渤海地区深度为 [0,30] cm、（30,100] cm 和（100,200] cm 的土壤有机碳密度均呈现自西南部向东北部逐渐增加的趋势;② 4 个数据集估算的土壤有机碳密度存在空间异质性,主要表现在辽宁省东部和河北省北部;③ 不同土地利用方式下的土壤有机碳储量存在差异,旱地的土壤有机碳储量最高,其次为林地、草地和城乡用地;④ 全氮、温度、降水和归一化植被指数等是影响土壤有机碳密度的主要因素.

关键词： 环渤海地区; 土壤有机碳; 有机碳密度; 相关性分析; 随机森林

本文引用格式

周明 , 王义东 , 郭长城 . 环渤海地区土壤有机碳密度的空间格局及影响因素[J]. 天津师范大学学报（自然科学版）, 2026 , 46(2) : 35 -44 . DOI: 10.19638/j.issn1671-1114.20260205

Abstract

To elucidate the spatial variation patterns and influencing mechanisms of soil organic carbon density, the Bohai Rim region was selected as the studied area. Based on the soil datasets of SoilGrids250 m, HWSD, WISE30sec and GSDE, ArcGIS technology was used to analyze the spatial distribution characteristics of soil organic carbon density and storage. The effects of soil physicochemical properties, climate, and topographic factors on soil organic carbon density were explored through correlation analysis and random forest methods. The results showed that: ① In the Bohai Rim region, soil organic carbon density gradually increased from the southwest to the northeast at depths of [0, 30] cm, (30, 100] cm, and (100, 200]cm; ② There was spatial heterogeneity in soil organic carbon density estimated from the four datasets, mainly manifested in the eastern part of Liaoning Province and the northern part of Hebei Province. ③ There were differences in soil organic carbon storage under different land use types. The soil organic carbon storage in dry land was the highest, followed by forest land, grassland, and urban and rural land. ④ Total nitrogen, temperature, precipitation and normalized difference vegetation index were the main factors influencing soil organic carbon density.

Key words： Bohai Rim region; soil organic carbon; organic carbon density; correlation analysis; random forest

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