SPATIAL AND TEMPORAL DYNAMICS OF SOIL ORGANIC CARBON IN RESERVED DESERTIFICATION AREA -A Case Study in Yulin City, Shaanxi Province, China

编号 zgly0000346526

文献类型 期刊论文

文献题名 SPATIAL AND TEMPORAL DYNAMICS OF SOIL ORGANIC CARBON IN RESERVED DESERTIFICATION AREA -A Case Study in Yulin City, Shaanxi Province, China

学科分类 220.1040;森林土壤学

作者 CHENGShu-lan  NIUHai-shan  WANGLin  ZHANGFeng  GAOJun-qin  TIANYu-qiang 

作者单位 GraduateSchoolofChineseAcademyofSciences  InstituteofGeographicSciencesandNaturalResourcesResearch 

母体文献 Chinese Geographical Science;中国地理科学: 英文版 

年卷期 2004,14(3)

页码 245-250

年份 2004 

分类号 S157 

关键词 时空转换  土壤学  有机碳  土壤退化 

文摘内容 Soil organic carbon (SOC) was considered to be a key index in evaluation of soil degradation and soil C sequestration. To discuss the spatial-temporal dynamics of SOC in arable layer in reversed desertification area, a case study was conducted in Yulin City, Shaanxi Province, China. Data of SOC were based on general soil survey in 1982 and repeated soil sampling in 2003. Soil organic carbon content (SOCC) was determined by K2Cr3O2-FeSO4 titration method, and soil organic carbon density (SOCD) was calculated by arithmetic average and area weighted average method, respectively. On average, SOCC and SOCD of the arable layer in the study area from 1982 to 2003 had increased 0.5 Ig/kg and 0.16kg/m2, respectively. Considering main soil types, the widest distributed Arid-Sandic Entisols had lowest values and increments of SOCC and SOCD during the study period; while the second widest Los-Orthic Entisols had higher values and increments of SOCC and SOCD, compared to the mean values of the whole region. The results indicated that reversed desertification process was due to the modification of land use and management practices, such as natural vegetation recovery, planting grass, turning arable land to grassland, and soil and water conservation etc., which can improve SOCC and SOCD and thus enhance soil C sequestration。