中亚热带季风气候带森林土壤pH和养分空间分布——以乐昌市为例  

Spatial Distribution of Forest Soil pH and Nutrients in Mid-subtropical Monsoon Climate Zone--A Case Study of Lechang City

作　　者：叶洋 李莹莹 张亮彪 赵志明 齐也[2] 丁晓纲[2] YE Yang;LI Yingying;ZHANG Liangbiao;ZHAO Zhiming;QI Ye;DING Xiaogang(Guangzhou Yonghe Forestry Co.,Ltd,Guangzhou,Guangdong 510520,China;Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China)

机构地区：[1]广州永荷林业有限公司,广东广州510520 [2]广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东广州510520

出　　处：《林业与环境科学》2025年第1期77-85,共9页Forestry and Environmental Science

基　　金：广东省林业科技创新项目(2023KJCX021);广东省生态林业建设项目“林地土壤调查”;广东省林业科技计划项目(2019-07)。

摘　　要：为了科学管理中亚热带季风气候带的土壤养分,保护土壤生态环境,实现土壤可持续利用,以韶关市乐昌市森林土壤为研究对象,随机布点、专题布点和林分布点相结合采集165个土壤样点,检测土壤pH、有机碳和大量元素含量,并运用相关性分析和克里金插值法探究不同土壤层各指标之间的相关性及空间分布格局。相关性分析结果显示,土壤pH与有机碳含量呈负相关关系,有机碳与全氮(TN)、全磷(TP)含量呈正相关,全氮与全磷含量也为正相关,其中有机碳与全氮在不同土壤深度始终保持强相关性(P<0.01)。空间分布图显示,每个指标在不同土壤深度的空间分布格局相似,高值和低值的分布区域也相近。结果表明,乐昌市森林土壤表层大多呈强酸或酸性,pH随着土壤深度加深而升高;表层有机碳含量丰富,均在中等及以上水平,随着土壤深度加深而递减;表层全氮含量丰富,均在中等及以上水平,随着土壤深度加深递减;表层全磷含量匮乏,均在中等及以下水平,随着土壤深度加深递增;表层全钾(TK)含量丰富,绝大多数区域处于中等及以上水平。To scientifically manage the soil nutrients in the mid-subtropical monsoon climate zone,protect the soil ecological environment,and achieve the sustainable utilization of soil,the forest soil in Lechang,Shaoguan city was selected as the research object,and 165 soil samples were collected by random distribution,specific distribution and forest distribution methods.The soil pH,organic carbon content,and macroelements content(TN,TP,TK)were detected,and the correlation and spatial distribution pattern of each index in different soil layers were explored by correlation analysis and the Kriging interpolation method.The results of correlation analysis showed that soil pH value was negatively correlated with organic carbon content,organic carbon was positively correlated with total nitrogen and total phosphorus content,and total nitrogen was also positively correlated with total phosphorus content.Among them,organic carbon and total nitrogen always maintained a strong correlation at different soil depths(P<0.01).The spatial distribution map indicates that the spatial distribution pattern of each index in different soil depths is similar,and the distribution areas of high and low values are also similar.The results showed that the surface layer of forest soil in Lechang city was mostly strong acid or acidic,and the pH increased with the deepening of soil depth.The organic carbon content in the surface layer is abundant,classified as medium or above levels,and similarly decreases with soil depth.The total nitrogen content in the surface layer is also rich,consistently at medium or above levels,and likewise decreases with soil depth.In contrast,the total phosphorus content in the surface layer is deficient,categorized as medium or below,and increases with soil depth.The total potassium content in the surface layer is abundant,with the majority of regions classified as medium or above.

关 键 词：中亚热带季风气候带 土壤PH 有机碳 大量元素 空间分布 

分 类 号：S714[农业科学—林学]