水土保持研究2025，Vol.32Issue(4)：26-32,7.DOI:10.13869/j.cnki.rswc.2025.04.005
沮河(黄陵段)河岸带有机碳组分分布特征及其影响因素
Distribution characteristics and influencing factors of organic carbon fractions in the riparian zone of Juhe River(Huangling Section)
摘要
Abstract
[Objective]This study aims to reveal the spatial distribution differences of soil organic carbon fractions in different regions of the riparian zone,explore the relationship between environmental factors and their distribution patterns,and provide a scientific basis for understanding the characteristics of soil carbon storage changes in the riparian zone.[Methods]This study used the surface soil of the riparian zone in the Juhe River(Huangling Section)as the research subject.The riparian zone was divided into four sections along the river flow:Section Ⅰ(natural ecological zone),Section Ⅱ(agroforestry symbiosis zone),Section Ⅲ(industrial and mining development zone),and Section Ⅳ(social living zone).By comparative analysis of the soil organic carbon fractions at different points in each section(including total organic carbon(TOC),particulate organic carbon(POC),and mineral-bound organic carbon(MAOC))and their physicochemical properties(e.g.,nitrate-nitrogen,ammonia-nitrogen,total phosphorus,available phosphorus,and water content),combined with correlation analyses,the influence of environmental factors on the distribution of organic carbon was investigated.[Results](1)The TOC content of surface soil in different sections ranged from 3.46 to 10.41 g/kg in Section Ⅰ,4.76 to 11.29 g/kg in Section Ⅱ,1.98 to 8.65 g/kg in Section Ⅲ,and 4.69 to 11.04 g/kg in Section Ⅳ.The average TOC content of each section followed the order Section Ⅳ>Section Ⅱ>Section Ⅰ>Section Ⅲ.(2)Significant differences were observed in the TOC,POC,and MAOC contents of surface soil among different sections,with consistent trends in their variations.(3)Correlation analysis showed highly significant positive correlations among soil organic carbon and its fractions and significant positive correlations with ammonia nitrogen and water content.[Conclusion]The distribution of soil organic carbon in the riparian zone was influenced by a variety of environmental factors,reflecting differences in ecological functions among different sections of the riparian zone.关键词
沮河/河岸带/土壤有机碳/有机碳组分Key words
Juhe River/riparian zone/soil organic carbon/organic carbon fractions分类
农业科学引用本文复制引用
涂龙杰,李鹏,王博,孟永霞,周世璇,张明辉,王宇晨,刘家亮..沮河(黄陵段)河岸带有机碳组分分布特征及其影响因素[J].水土保持研究,2025,32(4):26-32,7.基金项目
国家自然科学基金黄河水科学研究联合基金重点项目(U2243201) （U2243201）
陕西省2023年重点研发计划(2023-ZDLSF-65) （2023-ZDLSF-65）
