【摘要】 采集了长沙市东郊第四纪红土和花岗岩风化物两种母质发育的耕型红壤样品,通过室内分析获得了土壤的颗粒组成和土壤有机质含量。利用诺谟图法、修正诺谟图法、EPIC模型、几何平均粒径模型和Torri模型分别估算了两种母质发育红壤的可蚀性因子K值,并将估算结果与江西省鹰潭市中国科学院红壤生态试验站通过自然降雨实测方法获得的K值进行了比较。结果显示,Torri模型和几何平均粒径模型比较适合估算长沙市东郊第四纪红土发育红壤的可蚀性K值,Torri模型、几何平均粒径模型和EPIC模型比较适合估算长沙市东郊花岗岩风化物发育红壤的可蚀性K值。更多还原

【Abstract】 Soil samples of two cultivated red soils developed from weathered parent materials of quaternary red earth and granite were collected in eastern suburbs of Changsha City.Soil particle composition and soil organic matter were obtained by means of laboratory analysis.Then,soil erodibility factor K value was calculated using Nomogragh model,modified Nomogragh model,EPIC model,geometric mean particle model and Torri model.Finally,the calculated soil erodibility value was compared with the measured soil erodibility factor K value by the Red Soil Ecological Experimental Station of the Chinese Academy of Science in Jiangxi Province.Results showed that Torri model and geometric mean particle model are more suitable for calculating the K value of red soils developed from quaternary red earth in the eastern suburb of Changsha City,whereas EPIC model,geometric mean particle model and Torri model are suitable for calculating the K value of red soils developed from weathered granite materials.更多还原