长白山东部4种林分类型土壤有机碳及养分特征研究  

Characteristics of Soil Organic Carbon and Nutrients Under Four Forest Stands in Eastern Part of Changbai Mountains

作　　者：刘玲[1] 王海燕[1] 戴伟[1] 杨晓娟[1] 李旭[1] 

机构地区：[1]北京林业大学水土保持学院,教育部水土保持与荒漠化防治重点实验室,北京100083

出　　处：《水土保持通报》2013年第3期79-85,共7页Bulletin of Soil and Water Conservation

基　　金：国家重点基础研究发展计划项目"天然森林和草地土壤碳储量及时空格局"(2011CB403201);国家林业局公益性行业科研项目"我国典型森林类型健康经营关键技术研究"(20100400201)

摘　　要：以长白山东部长白落叶松天然林、长白落叶松人工林、天然阔叶混交林、天然针阔混交林4种林分类型为研究对象,对比分析了土壤有机碳(SOC)的垂直分布特征,以及与土壤理化性质的相关性。结果表明,4种林分下土壤有机碳含量及其差异程度随土壤深度增加均呈现逐渐减小的趋势。0—60cm土层土壤有机碳含量大小依次为天然针阔混交林(33.64±17.48g/kg)>长白落叶松天然林(25.30±15.09g/kg)>天然阔叶混交林(22.13±13.74g/kg)>长白落叶松人工林(19.23±12.35g/kg);天然针阔混交林0—60cm土壤有机碳密度为21.44±8.31kg/m2,显著高于其他3种林分类型,长白落叶松人工林最小,为14.29±1.59kg/m2。对不同土层土壤有机碳和土壤理化性质进行相关分析,结果表明,整个土壤剖面有机碳含量与自然含水率、全N、全P、全K、速效K均呈极显著或显著正相关,与土壤密度呈极显著负相关;不同林分类型土壤有机碳含量和碳密度与全N均呈显著或极显著正相关,与土壤理化性质相关性存在较大差异。Soil organic carbon（SOC）and its correlations with soil properties were studied under the four stand types of Larix olgensis natural forest,Larix olgensis plantation,natural mixed broad-leaved forest,and natural mixed coniferous and broad-leaved forest in the eastern part of Changbai Mountains.Results showed that the SOC contents had significant differences among different soil layers under the four stand types.The SOC content gradually decreased with the increase of soil depth,and SOC was mainly distributed in the topsoil（0—20cm）.The average SOC content under the stand types followed the order of natural mixed coniferous and broad-leaved forest（33.64±17.48g/kg） Larix olgensis natural forest（25.30±15.09g/kg） natural mixed broad-leaved forest（22.13±13.74g/kg） Larix olgensis plantation（19.23±12.35g/kg）.The SOC density in 0—60cm layer under natural mixed coniferous and broad-leaved forest was 21.44±8.31 kg/m2,higher than that under the other three stand types.In different soil layers,the correlations between the SOC density and soil physiochemical properties were different.The SOC content had significant negative correlations with soil bulk density,but positive correlations with soil moisture,soil total N and P,and available K.For different stand types,SOC had positive correlations with soil total N,but had great differences in correlation with soil properties.

关 键 词：土壤有机碳 林分类型 土壤性质 逐步回归分析 

分 类 号：S714[农业科学—林学]