亚热带山地马尾松–甜槠针阔混交林土壤养分空间分布特征与合理取样  

Spatial Distribution Characteristics of Soil Nutrients and Reasonable Soil Sampling in Subtropical Pinus massoniana-Castanopsis eyrei Mixed Forest

作　　者：文春玉 徐明[1] 聂坤 杨雪[1] 唐雪娅 魏珊 张健[1] WEN Chunyu;XU Ming;NIE Kun;YANG Xue;TANG Xueya;WEI Shan;ZHANG Jian(College of Life Sciences,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学生命科学学院,贵阳550025

出　　处：《土壤》2023年第6期1244-1250,共7页Soils

基　　金：国家自然科学基金项目(31960234,31660150)资助。

摘　　要：为了掌握亚热带山地针阔混交林土壤养分空间分布特征,选取黔中地区的马尾松-甜槠针阔混交林(PCF)和马尾松纯林(PF,对照)为研究对象,采用相邻网格法调查并采集土壤样品,结合经典统计学和地统计学方法,分析了土壤养分指标的空间分布特征。结果表明:①PF与PCF土壤pH、有机碳(SOC)、全氮(TN)、全磷(TP)、速效氮(AN)、有效磷(AP)和速效钾(AK)均存在显著性差异(P<0.05);②相较于PF,PCF土壤pH、SOC、TN、AN、AP和AK的空间异质性分布特征更为明显;③交叉验证分析结果表明,PCF和PF的合理采样数与采样面积分别为24个、600 m^(2)和17个、425 m^(2)。克里格插值结果表明,亚热带山地针阔混交林土壤养分表现出片状或斑块状空间分布特征,均一性较差。In order to master the spatial distribution characteristics of soil nutrients and reasonable soil sampling in coniferous and broad-leaved mixed forests of subtropical mountains,in this study,Pinus massoniana-Castanopsis eyrei mixed forest(PCF),Pinus massoniana pure forest(PF,control)in central Guizhou were selected as research objects,the adjacent grid method was used to investigate and collect soil samples,and the spatial distribution characteristics of soil nutrients were analyzed by using classical statistics and geostatistical analysis methods.The results showed as follows:1)Significant differences were found in soil pH,organic carbon(SOC),total nitrogen(TN),total phosphorus(TP),available nitrogen(AN),available phosphorus(AP)and available potassium(AK)between PF and PCF(P<0.05).2)Compared with PF,the spatial heterogeneity of all soil nutrients in PCF was more obvious.3)Cross-validation analysis showed that the appropriate sampling number and sampling area of PCF and PF were 24,600 m^(2) and 17,425 m^(2).The results of kriging interpolation showed that soil nutrients of subtropical mountainous coniferous and broad mixed forests were characterized by flaky or patchy distribution with a poor uniformity.

关 键 词：针阔混交林 森林土壤 异质性 空间分布 

分 类 号：S714.8[农业科学—林学]