川中丘陵区紫色土表层土壤有机碳分布及影响因素  

Organic Carbon Density and Distribution in Purple Topsoil of Sichuan

作　　者：邓良基[1,2] 何鹏[1,2] 高雪松[1,2] 苟曦[1,2] 

机构地区：[1]四川农业大学资源环境学院,四川雅安625014 [2]四川省土地信息重点实验室,四川雅安625014

出　　处：《山地学报》2006年第B10期1-5,共5页Mountain Research

基　　金：四川省教育厅自然科学重点项目资助（2003A009）

摘　　要：以2004～2006年间野外采样数据，采用土壤类型法对川中丘陵区（内江、资阳和遂宁三市）紫色土表层土壤有机碳密度及储量进行估算，分析了土壤有机碳密度的分布差异。据统计研究区紫色土面积为9070．19km^2，研究结果：表层土壤有机碳密度介于3．32kgC／m^2～1．71kgC／m^2间，具有高度的变异性，表层土壤有机碳储量为1．84Tg。并对影响紫色土有机碳分布的母质、地形和土地利用方式等因素进行了分析：不同成土母质上发育的表层土壤有机碳密度有差异，但均与母岩及其风化物有较强的相关性；主要土属从丘顶到丘脚土壤有机碳密度均逐渐增高；不同土地利用方式下土壤有机碳密度不同，但基本遵循疏林地〉荒草地〉坡耕地的规律。Base on field data between 2004 and 2006, soil type （Neijiang, Ziyang and Suining）, Comparing the difference of topsoil organic carbon density distribution. Research area is 9 070.19 km^2. The results showed that carbon density of different soil types ranged from 3.32 kg C/m^2to 1.71 kg C/m^2. In total, about 1.84 Tg C was stored in topsoil. The amount of carbon varied significantly at different districts in research area. Comparing the effect factors of parent material, terrainand land use. There were different SOCD（ soil organic carbon density） a- mong different parent materials. The SOCD of main soil genus were increase from knoll crownto knoll base. there were different SOCD on different land use, open woodland 〉 grassland 〉 culture lands.

关 键 词：表层土壤 土壤有机碳密度 分布 影响因素 

分 类 号：S159.2[农业科学—土壤学]