林地和旱地磁性特征对比研究  

Study on the Comparison of the Magnetic Properties Between Woodland and Dryland

作　　者：赵国永 韩艳[1] 张帅 张荣磊 乔强 孟嘉宁 ZHAO Guoyong;HAN Yan;ZHANG Shuai;ZHANG Ronglei;QIAO Qiang;MENG Jianing(College of Geographic Sciences/Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution,Xinyang Normal University,Xinyang 464000,China;Key Laboratory of Climate Change and Environmental Evolution of Xinyang City,Xinyang Normal University,Xinyang 464000,China)

机构地区：[1]信阳师范学院地理科学学院/河南省水土环境污染协同防治重点实验室,河南信阳464000 [2]信阳师范学院信阳市气候与环境演变重点实验室,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2022年第2期269-273,共5页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(41602187);河南省高等学校重点科研项目(22A610012);黄土与第四纪地质国家重点实验室开放基金项目(SKLLOG2039);山东省水土保持与环境保育重点实验室开放基金项目(STKF-201928)。

摘　　要：以驻马店泌阳县农业区的旱地和林地土壤剖面为研究对象,采用环境磁学方法对其进行系统的磁性特征分析。结果表明:(1)旱地和林地主要载磁矿物为低矫顽力亚铁磁性矿物,同时含少量高矫顽力磁性矿物。(2)旱地和林地磁畴大小接近,处于0.2~1.0μm之间。(3)退耕还林之后的林地在自然状态发育时间约20 a,但是其磁性特征未发生明显变化,说明短时期内退耕还林之后林地的自然成土过程并未改变之前土壤的磁性特征。(4)相较于林地,旱地亚铁磁性矿物含量高,说明人类活动导致亚铁磁性矿物含量增加;同时,旱地磁性矿物向下迁移深度大,说明人类活动促使磁性矿物向下迁移。The soil profiles of woodland and dryland in Biyang County,Zhumadian,Henan province,are studied.The magnetic characteristics are carried out by means of environmental magnetism.The results are as follows:(1)The main magnetic minerals in dryland and woodland are low-coercivity ferrimagnetic minerals.Simultaneously,a small amount of high-coercivity magnetic minerals are also appeared.(2)The magnetic domain of both is approximate,ranging from 0.2 to 1μm.(3)After returning farmland to forest,forest land has been developed in its natural state for about 20 years,however,the magnetic characteristics are not changed significantly,indicating that the natural soil-forming process does not change the magnetic characteristics in a short period of time.(4)Compared to woodland,the content of ferrimagnetic minerals in dryland is higher,suggesting that the increased content is closely related to human activities.Meanwhile,the deeper downward migration of magnetic minerals in dryland indicates that human activity has accelerated the process.

关 键 词：林地 旱地 环境磁学 人类活动 

分 类 号：X53[环境科学与工程—环境工程]