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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。
The cultivated red soil samples with cultivated Quaternary lateritic and granite weathering materials in the eastern suburbs of Changsha were collected and the soil particle composition and soil organic matter content were obtained through laboratory analysis. By using the nomogram method, the revised nomogram method, the EPIC model, the geometric mean particle size model and the Torri model, the erodibility factor K values of two parental red soils were estimated respectively. The results were compared with those of the Chinese Academy of Sciences The red soil ecological experiment station was compared with the K value obtained by the natural rainfall measurement method. The results show that the Torri model and the geometric mean particle size model are more suitable for estimating the erodible K value of Quaternary lateritic red earth in the eastern suburbs of Changsha. The Torri model, geometric mean particle size model and EPIC model are more suitable for estimating the granite Erosion erodibility K value of weathering developing red soil.