水土保持学报2017，Vol.31Issue(2)：184-190,214,8.DOI:10.13870/j.cnki.stbcxb.2017.02.031
喀斯特小流域土壤有机碳密度及碳储量空间分布异质性
Spatial Heterogeneity and Distribution Characteristics of Soil Organic Carbon Density and Soil Organic Carbon Storage in a Small Karst Watershed
摘要
Abstract
In order to elucidate the distribution characteristics of soil organic carbon density and the spatial distribution pattern of soil organic carbon storage in a small Karst watershed,using the combination of field sampling,laboratory determination,and Geo-statistics analysis,2 755 profiles which were investigated in detail and 23 536 soil samples were selected,the spatial heterogeneity and distribution characteristics of soil organic carbon density and soil organic carbon storage in a small Karst watershed were studied quantitatively.The results showed that the content of soil organic carbon and the average soil organic carbon density in the surface layer (0-20 cm) of the watershed was 25.07 g/kg and 5.23 kg/m2,respectively;the content of soil organic carbon and soil organic carbon density in the profile (0-100 cm) in the watershed was 20.71 g/kg and 10.21 kg/m2,respectively;the content of soil organic carbon and soil organic carbon density in two layers showed medium intensity variations.Soil organic carbon storage was 1.48 × 108 kg in the first 10 cm soil layer,2.65)× 108 kg in the first 20 cm soil layer,3.43 × 108 kg in the first 30 cm soil layer,and 5.39 × 108 kg in the 0-100 cm soil layer.The Nugget C0 of organic carbon storage in each layer increased with the increase of soil depth,being the maximum in the 0-100 cm soil layer.The organic carbon storages of four different soil layers were low in the middle,higher in the surrounding borders,and the lowest in the south.Elevation,slope,bare rock and gravel content were the main factors affecting the spatial heterogeneity of soil organic carbon storage in the watershed.关键词
喀斯特/有机碳储量/有机碳密度/空间异质性/小流域Key words
Karst/soil organic carbon storage/soil organic carbon density/spatial heterogeneity/small watershed分类
农业科技引用本文复制引用
张珍明,周运超,黄先飞,田潇..喀斯特小流域土壤有机碳密度及碳储量空间分布异质性[J].水土保持学报,2017,31(2):184-190,214,8.基金项目
国家重大科学研究计划项目(2013CB956702) （2013CB956702）
“百”层次人才计划[黔科合人才(2015)4022号] （2015）
贵州省基础研究项目(QKH-JZ-2014-200203) （QKH-JZ-2014-200203）
