摘要
土壤中Fe0含量及其分布与土壤的理化性质关系密切.本研究选择云南省景洪市热带森林土壤为研究对象,测定4条土壤剖面的Fe0含量及其理化参数,探究森林红壤Fe0的分布特征及其影响因素.结果表明:总体上,土壤Fe0含量随深度增加而减小;SWC、SOC、TN、S、TP、Eh、Ba、CIA与土壤Fe0含量呈显著正相关(P＜0.01),BD、pH与土壤Fe0含量呈显著负相关(P＜0.01);同时对0～40 cm、40～80 cm和80～140 cm的土层进行PCA分析,结果显示,0～40 cm 土壤样点的主要影响因子为Eh、SWC、Fe0、SOC、TP、S、TN,40～80 cm、100～140 cm 的土壤样点的主要影响因子为 Ba、BD、pH、CIA.本研究为了解云南热带森林红壤Feo的分布特征及其影响因素研究提供了参考,也为土壤生态环境保护提供了数据和理论支持.
Abstract
The content and distribution of Fe0 in soil are closely related to the physical and chemical properties of soil.In this study,the tropical forest soil of Jinghong city,Yunnan province was selected as the research object,and the Fe0 content and physicochemical parameters of 4 soil profiles were determined to explore the distribution characteristics and influencing factors of Fe0 in forest red soil.The results showed that the Fe0 content in soil decreased with increasing depth.SWC,SOC,TN,S,TP,Eh,Ba,CIA were significantly positively correlated with soil Fe0 content(P＜0.01),BD and pH were negatively correlated with soil Fe0 content(P＜0.01);At the same time,PCA analysis was performed on 0～40 cm,40～80 cm and 80～140 cm soil layers.The results showed that the main influencing factors of 0～40 cm soil samples were Eh,SWC,Fe0,SOC,TP,S and TN.The main influencing factors of 40～80 cm and 100～140 cm soil samples were ba,BD,pH and CIA.This study provides a reference for understanding the distribution characteristics and influencing factors of Fe0 in Yunnan tropical forest red soil,and also provides data and theoretical support for soil ecological environment protection.
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