中文摘要：

选取丹江鹦鹉沟小流域典型土地利用类型进行土样采集,研究不同土地利用类型下土壤团聚体的粒径分布特征和团聚体有机碳含量与粒径的相互关系,运用情景模拟法计算不同土地利用类型下的土壤团聚体有机碳储量转移矩阵。结果表明：不同土地利用类型土壤团聚体含量大致呈现伴随粒径的减小而减小的趋势,且主要集中于大粒径（2~10mm）的范围内。经ANONA检验,农地与林地,林地与草地之间土壤团聚体不同粒级有机碳含量存在显著差异（P〈0.05）,其典型用地之间的土壤团聚体有机碳粒径分布的变异性属于中等变异,且团聚体有机碳与小粒径（〈1mm）的土粒结合更加紧密,有机碳储量的粒径分布呈现出近似正态分布的状态。

英文摘要：

The objectives of this study were to explore the distribution characteristics of soil aggregate particle size under different land use types and the relationship between organic carbon content of soil aggregate and particle size by using the method of scenario simulation to calculate transfer matrix of soil aggregate organic carbon under different land use types in the Yingwugou Watershed of the Dan River. Results showed that soil aggregate content had a decreasing trend with decreasing particle size under different land use types, and focused on large size（2-10 ram）. The ANOVA showed that organic carbon in different soil aggregate size had significant difference between farmland and forest land, forest land and grassland （P 〈0. 05）, the variability of organic carbon in different soil aggregate size belonged to medium variation, while small particle size（〈1 mm） and aggregate organic carhon were closed integration, as while as, the particle size distribution of organic carbon storage was approximate normal distribution.