简介：我们在一条森林道路的不同部分测量了erodibility和土壤总数的吝啬的重量直径(MWD)。表层土的样品从cutslope，fillslope，估计质地的道路表面和森林地面，体积密度，潮湿，CaCO3和有机物被收集。土壤总数稳定性被湿sieving决定。道路表面上的土壤erodibility分别地比在fillslope和cutslope上高2.3和1.3倍。森林土壤有最低erodibility。cutslope和道路表面的总数稳定性分别地低、很低。在有CaCO3和沙内容的cutslopeerodibility之间有一种重要否定关系。Cutslopeerodibility与增加淤泥，泥土和潮湿内容增加了。在fillslopes上，MWD与增加岩石碎片盖子，植物盖子，崽盖子，有机物和沙增加了。在fillslopeerodibility和有机物之间有强壮的否定关联，沙和MWD。在悬钩子属植物hyrcanusL下面赤裸的土壤和土壤的erodibility之间没有重要差别。并且Philonotismarchica(Hedw)Brid。

简介：Soilaggregatestability,animportantindexofthephysicalcharacteristicsofasoil,canprovideagoodindicationofasoil’serodibility,anddeservesspecialconsiderationinregionswithcoldclimate.Theobjectiveofthisstudywastostudytheeffectoffreeze-thawonsoilwater-stableaggregatesintheblacksoilregionofNortheastChina.Samplesofatypicalblacksoilintheregionwerecollectedtomeasurewater-stableaggregatesafterfreeze-thawunderdifferentconditions(i.e.,initialmoisturecontents,freezethawcyclesandfreezingtemperatures)bywet-sievingintoeightparticlesizegroups(>10,10–6,6–5,5–3,3–2,2–1,1–0.5,and0.5–0.25mm).Freeze-thawhadthemosteffectonaggregatestabilitywhenthesampleshadaninitialmoisturecontentof400gkg-1.Thewater-stableaggregatesofthefourlargerparticlesizegroups(>5,5–3,3–2,and2–1mm)reachedapeakstabilityvalue,butthoseofthetwosmallerparticlesizegroups(1–0.5and0.5–0.25mm)reachedaminimumvaluewhenthesoilmoisturecontentwas400gkg-1.Water-stableaggregatesofthefourlargerparticlesizegroupsdecreasedwhilethoseofthetwosmallerparticlesizegroupsincreasedwiththeincreaseoffreeze-thawcycles.Astemperaturesfell,thewater-stableaggregatesofthefourlargerparticlesizegroupsdecreasedwhilethoseofthetwosmallerparticlesizegroupsincreased.