凤阳山典型林分土壤有机碳特征  

Soil Organic Carbon Characteristics of Different Forest Types in Fengyang Mountain

作　　者：陈美玲 赵友朋 张金池 王宇浩 孟苗婧[2] 刘鑫[2] 李翀 谢德晋 Chen Meiling;Zhao Youpeng;Zhang Jinchi;Wang Yuhao;Meng Miaojing;Liu Xin;Li Chong;Xie Dejin(Nanjing Forestry University,Nanjing 210037,P.R.China)

机构地区：[1]南京林业大学林学院,南京210037 [2]南京林业大学,南京210037 [3]南京林业大学林学院、南方现代林业协同创新中心(南京林业大学)、江苏省水土保持与生态修复重点实验室(南京林业大学),南京210037

出　　处：《东北林业大学学报》2022年第10期69-75,共7页Journal of Northeast Forestry University

基　　金：江苏省自然科学青年基金项目(BK20200785);江苏省林业科技创新与推广项目(LYKJ[2021]30);百山祖国家公园科学研究项目(2021ZDLY01);江苏高校优势学科建设工程项目(PAPD)。

摘　　要：2016年8月份,在浙江省凤阳山海拔1300~1400 m选取4种主要林分类型(常绿阔叶林、针阔混交林、杉木林、竹林)为研究对象,每种林分设置3个标准样地(20 m×20 m);用“S”型方法在每个标准样地内布设5个样点,按照2个土层深度(h)0<h≤15 cm、15 cm<h≤30 cm分别采集土样;测定土壤基本理化性质、有机碳质量分数、颗粒有机碳质量分数、矿质结合态有机碳质量分数,分析土壤有机碳特征及其与理化性质相关性。结果表明:除竹林外,随土层加深,土壤有机碳质量分数呈减少趋势,存在表层富集现象。在0<h≤15 cm土层,常绿阔叶林转化为竹林后,常绿阔叶林土壤有机碳质量分数显著高于竹林(P<0.05);杉木林、竹林的土壤细颗粒有机碳质量分数,与常绿阔叶林的土壤细颗粒有机碳质量分数差异显著(P<0.05)。杉木林和常绿阔叶林的土层深度对土壤有机碳质量分数、颗粒有机碳质量分数影响显著(P<0.05),常绿落叶林和针阔混交林的土层深度对土壤细颗粒有机碳质量分数影响显著(P<0.05)。从垂直剖面看,4种林分在0<h≤30 cm土层,矿质结合态有机碳质量分数,由大到小依次为阔叶混交林(11.18 g·kg^(-1))、针阔混交林(9.76 g·kg^(-1))、竹林(9.45 g·kg^(-1))、杉木林(8.25 g·kg^(-1))。在15 cm<h≤30 cm土层,常绿阔叶林、杉木林,与竹林的土壤pH差异显著(P<0.05),杉木林与竹林之间的土壤密度、非毛管孔隙度均差异显著(P<0.05)。在15 cm<h≤30 cm土层,土壤总氮质量分数与土壤细颗粒有机碳质量分数呈极显著正相关(P<0.01);土壤有机碳质量分数、土壤细颗粒有机碳质量分数、土壤颗粒有机碳质量分数,与土壤总孔隙度、毛管孔隙度呈极显著正相关(P<0.01),与土壤密度呈极显著负相关(P<0.01)。森林类型由常绿阔叶林部分转化为杉木林和竹林后对土壤有机碳稳定性产生影响,主要是因为不同林分类型的土壤总氮质量分数、总�In August 2016,four main forest types(evergreen broad-leaved forest,mixed coniferous and broad-leaved forest,Chinese fir forest and bamboo forest)were selected in Fengyang Mountain,Zhejiang Province at an altitude of 1300-1400 m.Three standard plots(20 m×20 m)were set up for each stand,and five samples were collected by using the“S”pattern method,and soil samples are collected respectively according to the depth of two soil layers(h)0<h≤15 cm and 15 cm<h≤30 cm;The basic physical and chemical properties,organic carbon mass fraction,particulate organic carbon mass fraction and mineral bound organic carbon mass fraction of soil were measured to analyze the characteristics of soil organic carbon and its correlation with physical and chemical properties.With the deepening of soil layers,except bamboo forests,the soil organic carbon content decreased,and there was a phenomenon of enrichment in the surface layer;In the soil layer of 0<h≤15 cm,the soil organic carbon mass fraction of evergreen broad-leaved forest was significantly higher than that of bamboo forest(P<0.05);The content of soil fine particulate organic carbon in Chinese fir and bamboo forests was significantly different from that in evergreen broad-leaved forests(P<0.05);The soil depth of Chinese fir forest and evergreen broad-leaved forest had significant effects on soil organic carbon content and particulate organic carbon mass fraction(P<0.05),while the soil depth of evergreen deciduous forest and coniferous broad-leaved mixed forest had significant effects on soil fine particulate organic carbon content(P<0.05).From the vertical profile,the four kinds of forests in the 0<h≤30 cm soil layer,the content of mineral bound organic carbon in descending order are the current broad-leaved mixed forest(11.18 g·kg^(-1)),the coniferous and broad-leaved mixed forest(9.76 g·kg^(-1)),the bamboo forest(9.45 g·kg^(-1)),and the Chinese fir forest(8.25 g·kg^(-1)).In the 15 cm<h≤30 cm soil layer,the soil pH values of evergreen broad-leaved forest,Chines

关 键 词：林分类型 阔叶混交林 针阔混交林 杉木林 竹林 土壤理化性质 土壤有机碳 

分 类 号：S714.2[农业科学—林学]