西南林业大学学报2025，Vol.45Issue(11)：61-69,9.DOI:10.11929/j.swfu.202501029
华南低丘红壤区森林土壤养分特征与肥力评价
Nutrient Characteristics and Fertility Evaluation of Forest Soil in Hilly Red Soil Region of South China
摘要
Abstract
This study focused on the soil systems from 4 forest types(coniferous forest,coniferous-broadleaved mixed forest,bamboo forest,and broadleaved forest)in the hilly red soil region of Zhaoqing City,Southern China.Adopting a combination of stratified random sampling and geostatistical point layout methodolo-gies,we systematically established 447 sampling sites across the study area.Through quantitative determination of soil organic carbon(SOC),total nitrogen(TN)and total phosphorus(TP)concentrations,spatial distribution pat-terns were mapped using the Kriging interpolation method.Concurrently,a comprehensive soil fertility assess-ment was conducted to investigate the fundamental characteristics of forest soil fertility in Zhaoqing City,with particular emphasis on identifying the dominant nutrient elements governing soil quality in this subtropical red soil region.The results showed that the contents of SOC,TN and TP in the study area were the highest in the sur-face soil layer(0-20 cm),decreasing with soil depth and exhibiting significant surface aggregation.The SOC,TN and TP in each soil layer belong to the moderate to high variability,showing strong spatial heterogeneity.The SOC storage within the 0-100 cm profile was the highest in coniferous forests and the lowest in broadleaved forest,while soil TN and TP storage were highest in bamboo forests and the lowest in coniferous forests.Soil fer-tility evaluation revealed that 4 forest types exhibited moderate fertility levels,with soil quality indices ranked as follows:bamboo forest(0.462)＞coniferous and broadleaved mixed forest(0.434)＞coniferous forest(0.432)＞broadleaved forest(0.291).TN and SOC were identified as the primary limiting factors for soil fertility in Zhaoqing City's forest ecosystems.关键词
土壤肥力/养分/红壤/空间分布/克里金插值法/森林类型/肇庆市Key words
soil fertility/nutrient/red soil/spatial distribution/Kriging interpolation method/forest type/Zhaoqing City分类
农业科技引用本文复制引用
Zou Zuyou,Gao Longhui,Yang Jincheng,Zhang Zhongrui,Qiu Quan,He Qian,Ding Xiaogang,Su Yan..华南低丘红壤区森林土壤养分特征与肥力评价[J].西南林业大学学报,2025,45(11):61-69,9.基金项目
广东省生态林业建设项目"林地土壤调查"资助 （）
广东省林业科技创新项目(2023KJCX021)资助. （2023KJCX021）
