热带地理 ›› 2018, Vol. 38 ›› Issue (5): 668-677.doi: 10.13284/j.cnki.rddl.003075
任向宁1,3,董玉祥1,2,王秋香4
出版日期:
2018-09-05
发布日期:
2018-09-05
作者简介:
任向宁(1978―),男,河北正定人,博士生,主要研究方向为土地资源开发利用与保护,(E-mail)xnren@scau.edu.cn。
REN Xiangning1,3,DONG Yuxiang1,2,WANG Qiuxiang4
Online:
2018-09-05
Published:
2018-09-05
摘要:
土壤有机碳库动态变化对区域乃至全球碳平衡具有显著影响,快速城市化地区社会经济迅速发展中土地利用/覆被变化剧烈,其农田耕层土壤有机碳库变化问题倍受关注。选择珠三角核心区为研究区域,基于1980与2015年农田耕层土壤有机碳含量数据,以乡镇为单元分析农田耕层土壤有机碳库储量的时空变化特征,并通过地理探测器定量识别其影响因素的主导因素。结果表明:1)珠三角核心区农田耕层土壤有机碳库储量1980―2015年间损失巨大,损失量达67.16%,同时其空间变化具有典型的城镇集群指向特征,即距离城镇集群越近,损失程度越大;2)珠三角核心区农田耕层土壤有机碳库储量的时空异质性变化受到气候变化、地形状况、水文环境、社会经济发展、土地利用变化和农田景观变化等多种因素的影响,且其影响力存在较大差异,各因素贡献力(q统计量)介于0.004~0.256之间;3)珠三角核心区农田耕层土壤有机碳库时空变化主导影响因素的贡献力表现为农田景观变化>二三产增长胁迫>水网密度>土地结构变化。
任向宁,董玉祥,王秋香. 珠三角核心区农田耕层土壤有机碳库储量时空变化特征及其影响因素识别[J]. 热带地理, 2018, 38(5): 668-677.
REN Xiangning,DONG Yuxiang and WANG Qiuxiang. Temporal and Spatial Variation of Soil Organic Carbon Storage in the Core Area of Pearl River Delta and Identification of Influencing Factors[J]. TROPICAL GEOGRAPHY, 2018, 38(5): 668-677.
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