期刊论文

中文

生态环境学报

1674-5906

2013

22

11

1780-1784

10.16258/j.cnki.1674-5906.2013.11.016

31100381:国家自然科学基金 41001141:国家自然科学基金 11YJ20:湖南农业大学***项目

本校为第一机构

土壤活性碳组分是土壤健康变化的指示器。选取湘东丘陵区3种不同母质发育的林地土壤(紫色土、板岩红壤和花岗岩红壤),研究土壤颗粒有机碳(POC)和溶解性有机碳(DOC)的剖面分布规律,并分析POC、DOC与土壤有机碳(SOC)、土壤质地的关系。结果表明:土壤剖面POC、DOC质量分数分别介于0.29~3.87 g·kg~(-1)和15.01~311.34 mg·kg~(-1),随剖面加深而大幅降低。土壤剖面POC储量介于8.61~16.54 t·hm~(-2),以花岗岩红壤最高,板岩红壤最低;而DOC储量介于380.76~1184.83 kg·hm~(-2),以板岩红壤最高,紫色土最低。POC占SOC的比例(POC/SOC)介于6.42%~46.25%,其中紫色土和板岩红壤POC/SOC随土层加深而降低,而花...

The labile fractions of soil organic carbon (SOC) are sensitive indicators of soil health. In the present study, two labile fractions of SOC, such as particulate organic carbon (POC) and dissolved organic carbon (DOC) were selected from three woodland soils derived from different parent materials (purple soil, red soil derived from granite and red soil derived from slate) in the hilly region, eastern Hunan Province. The purpose is to analysis the soil profile distributions of POC and DOC, and their correlations to SOC and soil texture in the th...