豫南山区四县(市)森林土壤化学质量评价  

Evaluation of Forest Soil Chemical Quality in Four Counties(Cities)in the Mountainous Area of South Henan

作　　者：张萌 沈雅飞[1,2,3] 孙鹏飞 王丽君 曾立雄 陈天[1] 肖文发 田耀武 程瑞梅[1,2,3] ZHANG Meng;SHEN Yafei;SUN Pengfei;WANG Lijun;ZENG Lixiong;CHEN Tian;XIAO Wenfa;TIAN Yaowu;CHENG Ruimei(Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Con-servation Institute,Chinese Academy of Forestry,Beijing 100091,China;Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China;National Orientation Observation and Research Station of Forest Ecosystem in the Three Gorges Reservoir Area,Zigui 443699,China;Henan University of Science and Technology,Luoyang 471000,China)

机构地区：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091 [2]南京林业大学南方现代林业协同创新中心,南京210037 [3]湖北秭归三峡库区森林生态系统国家定位观测研究站,秭归443699 [4]河南科技大学,洛阳471000

出　　处：《陆地生态系统与保护学报》2022年第1期82-90,共9页Terrestrial Ecosystem and Conservation

基　　金：科技部基础工作专项(2014FY120700);中国林业科学研究院基本科研业务费专项(CAFYBB2021ZE003)。

摘　　要：【目的】研究豫南山区四县(市)森林表层土壤化学性质差异,揭示森林土壤化学质量的特征,旨在为豫南山区未来森林土壤管理和植被恢复提供科学依据。【方法】在豫南山区四县(市),采集森林表层土壤样品,测定土壤pH值、电导率、有机碳含量以及8种金属元素含量共11个化学指标,采用主成分分析方法对森林表层土壤的化学质量评价。【结果】1)研究地区森林表层土壤pH值的变异系数较小,总体上呈中性,其中信阳市最低,内乡县最高;土壤的镁含量变异系数最大,在豫南山区四县(市)各采样点之间有强烈的空间变异性。同时,森林表层土壤pH、有机碳、镁、锰、钠及锌含量都有显著的空间差异(P<0.05),而其它土壤化学性质无显著的空间差异(P>0.05)。2)影响豫南四县(市)森林表层土壤化学质量的主要因素有土壤有机碳含量、电导率、铁含量、钠含量、钾含量。森林表层土壤化学质量排名为:鲁山县>信阳市>内乡县>桐柏县。【结论】土壤有机碳含量是影响豫南四县(市)表层森林土壤化学质量的关键因子,因此在未来森林土壤管理过程中,应采取适当措施提高土壤有机碳含量,以提高森林土壤的化学质量。【Objective】Our study aims to reveal the characteristics of forest soil chemical quality in four counties(cities)in mountainous areas of southern Henan by investigating the differences in the chemical properties of forest topsoil in the areas,which would provide a scientific basis for future forest soil management and vegetation restoration.【Method】Forest topsoil samples were collected in four counties(cities)in mountainous areas of southern Henan.A total of 11 chemical indicators such as soil pH-value,organic carbon content,electrical conductivity,and content of 8 metal elements were measured.The principal component analysis was used to determine the chemical quality of forest topsoil in the four counties(cities).【Result】1)The variation coefficient of pH-value of forest topsoil in the study area was relatively small,and the overall pH-value of the soil in the study area was generally neutral.Among them,Xinyang City had the lowest soil pH-value and Neixiang County had the highest soil pH-value.The variation coefficient of soil Mg content was the largest,indicating that there was a strong spatial variability in soil Mg content among the sampling points in the four counties(cities)in the mountainous area of southern Henan.At the same time,there were significant spatial differences in the contents of pH,organic carbon,Mg,Mn,Na and Zn in forest topsoil(P<0.05),but there were no significant spatil differences in other soil chemical properties(P>0.05).2)The main factors affecting the chemical quality of forest topsoil in the four counties(cities)were soil organic carbon content,electrical conductivity,Fe content,Na content and K content.The chemic-al quality of forest topsoil in the studied four counties(cities)was ranked as:Lushan County>Xinyang City>Neixiang County>Tongbai County【Conclusion】The soil organic carbon content is a key factor affecting the chemical quality of forest topsoil in the four counties(cities)in southern Henan.Therefore,in the process of future soil management,appropriate measures

关 键 词：豫南山区 土壤化学质量 最小数据集 主成分分析 

分 类 号：S714.5[农业科学—林学]