摘  要根据2007年在江西省余江县采集的568个土壤样点数据，结合余江县1:50000地形图，等高线，在全县范围内依据地势高低在南、中、北部选定合适大小的三个研究区域，利用Arcgis软件与经典统计学和地统计学知识相结合的方法，分析土壤有机碳含量的空间分布特征，对样区内土壤有机碳储量进行估算。通过平均坡度不同的三个研究区与土壤有机碳储量进行对比，揭示了坡度因素对土壤有机碳储量的影响。结果表明：北部研究区内的土壤有机碳平面和曲面储量分别为6.24×107 kg和6.63×107 kg，平均土壤有机碳密度为5.52 kg m-2；中部研究区的土壤有机碳平面和曲面储量分别为9.89×107 kg和9.90×107 kg，平均土壤有机碳密度为2.73 kg m-2；南部研究区的土壤有机碳平面和曲面储量分别为9.86×107 kg和1.13×108 kg，平均土壤有机碳密度为3.45 kg m-2。坡度对土壤有机碳储量在不同地形区的影响效果不同，在丘陵岗、低矮丘陵地带有显著影响，而在平原地区影响较弱。71142

毕业论文关键词：坡度  土壤有机碳储量  空间分布  土壤有机碳密度

Estimation of Soil Organic Carbon Pool Based on Surface Area

Abstract According to the collected of 568 soil sample data in Yujiang County, Jiangxi Province in 2007, combined with Yujiang County 1:50000 topographic map, contour,  within the scope of whole county ,based on the terrain height select the three study regions with appropriate size from the south, middle and north part,using a combination of ArcGIS software and the classical statistics and geostatistical knowledge. Analysis the space distribution characteristics of soil organic carbon storage , estimate the soil organic carbon storage of study areas. By comparing the three study areas with the different average slope gradient, the soil organic carbon storage was compared, and the effect of slope gradient on soil organic carbon storage was revealed. The results showed that the northern study area of soil organic carbon flat and curved storage were 6.24×107 kg and 6.63×107 kg, average soil organic carbon density was 5.52 kg m-2; central in the study area of soil organic carbon flat and curved storage were 9.89×107 kg and 9.90×107 kg, average soil organic carbon density was 2.73 kg m-2; the Southern study area of soil organic carbon flat and curved storage were 9.86×107 kg and 1.13×108 kg, average soil organic carbon density was 3.45 kg m-2 .Slope of soil organic carbon storage in different terrain areas have different effects, in the hilly and gully region, the low hilly region has a significant impact, while in the plain area, the impact is weak.

Key Words: Slope   Soil organic carbon storage  Space distribution  Soil organic carbon density

目  录

摘要 I

Abstract II

目  录 III

图清单 IV

表清单 IV

1前言 1

1.1研究意义 1

1.2国内外研究进展 1

2研究方法 2

2.1研究区概况 2

2.2数据来源 3

2.3 研究方法 4

2.4 所用软件 5

3结果与讨论 5

3.1描述性统计分析 5

3.2样区曲面面积和平面面积的计算