林业科学Issue(8)：162-167,6.DOI:10.11707/j.1001-7488.20140823
海拔对神农架表层土壤活性有机碳含量的影响
Effects of Elevation on Surface Layer Soil Active Organic Carbon Content in Shennongjia Nature Reserve
摘要
Abstract
In this study,five typical vegetation types were selected along the elevational gradient in Shennongjia Nature Reserve,including shrubs, coniferous forest, mixed forest between coniferous and deciduous broad-leaved forest, deciduous broad-leaved forest,and evergreen broad-leaved forest. The content of soil organic carbon ( SOC ) ,water dissolved organic carbon ( WDOC ) ,labile organic carbon ( LOC ) ,and microbial biomass carbon ( MBC ) and their allocation proportions to SOC were analyzed. Furthermore,the Pearson relationship was analyzed between soil active organic carbon and plant diversity or soil physiochemical properties. The results showed that the soil organic carbon in the surface layer increased with the elevation increased, except for the deciduous broad-leaved forest. Distribution characteristics of MBC and LOC content along elevation gradient were obvious,but WDOC content was independent of the elevation gradient. The contents of the three kinds of active organic carbon in different elevational gradients were in the order of: LOC>MBC >WDOC. The allocation ratios of MBC,LOC and WDOC to SOC did not significantly alter with elevational gradient. Pearson relationship showed that SOC and MBC had a significant negative correlation with the diversity of trees and shrubs (P < 0. 05),while LOC and WDOC content had no significant correlation with plant diversity. In addition,SOC and MBC were significantly positively correlated with the content of soil moisture,total nitrogen,available nitrogen,total phosphorus and total sulfur (P<0. 01). LOC had a significant and positive correlation with the content of soil moisture,total nitrogen,available nitrogen and total sulfur (P <0. 01). There was a significant correlation between LOC and total phosphorus ( P<0 . 05 ) . The results revealed that these factors had a dominating impact on SOC,LOC and MBC. WDOC content had no obvious correlation with soil factors.关键词
神农架/海拔/活性有机碳/水溶性有机碳/易氧化有机碳/微生物量碳Key words
Shennongjia/elevation/active organic carbon/water dissolved organic carbon/labile organic carbon/microbial biomass carbon分类
农业科技引用本文复制引用
卢慧,丛静,薛亚东,杨敬元,陈克龙,李迪强,张于光..海拔对神农架表层土壤活性有机碳含量的影响[J].林业科学,2014,(8):162-167,6.基金项目
中央公益型科研院所基本科研业务费专项资金项目( CAFRIFEEP201101) （ CAFRIFEEP201101）
湖北神农架国家级自然保护区本底资源调查子项目 （）
国家自然保护区生物标本资源共享子平台(2005DKA21404)。 （2005DKA21404）
