土壤2013，Vol.45Issue(2)：326-331,6.
亚热带典型小流域水稻土土壤体积质量预测模型构建与评估
Estimation of Soil Bulk Density for Paddy Soils in a Typical Catchment in Southern Subtropical China
摘要
Abstract
Soil bulk density is vital for national carbon inventory and hydrological modeling study.In this study 19 intact paddy soil cores at a depth of 0-1 m located in Jinjing Town of Hunan Province in subtropical region were collected.By utilizing soil organic carbon content,texture and soil depth as prediction parameters,a regressive model for estimating soil bulk density was developed and compared to existing models.Results indicated that:i) soil bulk density is significantly influenced by soil organic carbon content with r =-0.81,followed by soil depth and texture,but influenced less by soil clay content.Loam and silt loamy were accounted for most of studied soil textures.The bulk density ranged from 0.79 to 1.66 g/cm3 with an average of 1.27 g/cm3 for topsoil,but varied between 1.32 and 1.80 g/cm3 with an average of 1.58 g/cm3 for subsoil,and ii) the adjusted determined coefficient of derived model was 0.75 with 0.01 of ME and 0.10 of RMSE,respectively.This study also found that the Kaur (2002) and Manrique (1991) models could make good predictions of soil bulk density,but still not as good as the model developed in this study.Thus,the soil bulk density prediction model developed in this study will play a crucial role in estimating carbon stock of paddy fields as well as in applying hydrological models in the region.关键词
稻田/体积质量/回归模型/碳储量/水文模型Key words
Paddy soil/ Bulk density/ Regressive model/ Carbon inventory/ Hydrological model分类
农业科技引用本文复制引用
邹刚华,李勇,李裕元,彭佩钦..亚热带典型小流域水稻土土壤体积质量预测模型构建与评估[J].土壤,2013,45(2):326-331,6.基金项目
中国科学院创新团队项目(KZCX2-YW-T07)和"百人计划"项目资助. （KZCX2-YW-T07）
