【摘要】 通过对黄土丘陵区五省(区)七县(市)柠条林地、农地,人工草地及母质的有机质含量,水稳性团粒含量等20多种土壤抗蚀性指标测定比较和多元统计数学分析得出在该区柠条林地的土壤抗蚀性最强,草地次之,农地和黄土母质最弱;同一剖面,表层土壤抗蚀性明显强于下层,且随着土层深度增加土壤抗蚀性减弱;在林地中,随着林龄的增大土壤抗蚀性增强;侵蚀性黑垆土、栗钙土和灰钙土的抗蚀性强于黄绵土和灰褐土,在黄土丘陵区从东向西,土壤抗蚀性有增强大趋势;水稳性团粒含量和有机质含量的变化规律与实际相符,其它指标则表现无规律。更多还原

【Abstract】 Determines the anti-erodibility indices of soils on different covered hill-lands of loess plateau in 7 counties of 5 provinces. By multivariate analysis, the anti-erodibility of soils nuder different vegetation forms showed signi -ficant variation. the order of anti-erodibility follows: Peashurd land soil> grassland soil > farm land soil and loess parant material. On the same soil profile, the anti-erodibilty showed deereasing tendency with the depth of the soil, the surface layer is much higher that of the subsoil. On peashrub land, the anti-erodibility of soils increased with the age of the shrubs. The anti-erodibility of ortho dark loessial soil, ortho chestnut soil and ortho sierozem was higher than that of yellow loessial soil and ortho grey-drab forest soil. An increasing tendency was found from the east to the west on hill area of loess plateau. the anti-erodibility of soils also varied correspondingly with the water stable aggregate and organic matter contents. Other indices do not reflect precisely the anti-erodibility of soils.更多还原