雷公山4种森林类型的土壤可蚀性K值及影响因素.pdf

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1、贵州农业科学2014，42(7)：64～67GuizhouAgriculturalSciences[文章编号]1001—3601(2014)07—0385—0064—04雷公山4种森林类型的土壤可蚀性K值及影响因素吴小波，王震洪～，何建敏，曹荣权(1．贵州大学林学院，贵州贵阳550O25；2．贵州大学生命科学学院，贵州贵阳550025)[摘要]为揭示雷公山土壤可蚀性状况，采用EPIC模型对雷公山4种森林类型土壤可蚀性K值进估算。商时分1斤了土壤可蚀性K值的影响因素。结果表明：4种森林类型土壤可蚀性K值的变化范围0．

2、27。8~0303，K值的变异系数均小于10，空间变异性为弱变异性；4种森林类型土壤可蚀性K值大小．序为乔木林>乔灌过渡林>灌木林≈马尾松林；样方坡度在17。～31。，坡度与土壤可蚀性K值的Pearson，关系数为0．017，线性相关不密切；生物结皮可增加土壤有机质含量、粉砂含量，当生物结皮达到60时可低土壤可蚀性K值；EPIC模型指标的相关分析表明，可蚀性K值与砂粒含量呈极显著负相关，与粉砂含呈极显著正相关，与粘粒含量呈显著正相关，与有机碳含量相关性不显著。[关键词]土壤可蚀性K值；雷公山；森林类型；坡度；生物结

3、皮；EPIC模型[中图分类号]$714．7[文献标识码]ASoilErodibilityK—FactorandItsInfluencingFactorsofFourForestTypesinLeigongMountainwuxiaobo，WANGZhenhong弘，HEJianmin，CAORongquan(1．ForestryCollege，GuizhouUniversity，Guiyang，Guizhou550025；2．CollegeofLifeSciences’GuizhouUniversity，Guiya

4、ng，Guizhou550025，Chino)Abstract：InordertorevealtheconditionofthesoilerodibilityinLeigongMoutain，EPICmodelwasusedtoestimatethesoilerodibility(K—factor)offourforesttypesinLeigongMoutain’andthelnfluencingfactorsofsoilerodibilitywasalsoanalyzed．Results：Thespatialv

5、ariabilityofsoilerodibility(k-factor)ofthosefourforesttypeswasrelativelyweak，withtherangefrom0．278to0．303’andthevarlancecoefficientwaslessthan10．Thesizeofsoilerodibility(K—factor)ofthosefourforesttypespresentedthe．order：Arbor1and>shrub—treetransitionalforest>s

6、hrubland≈Pinusmassonianaforest·Therangeoislopewas17～31。，thePearsoncorrelationcoefficientofslopewithsoilerodibility(k—factor)waso·O1butthelinearcorrelationofslopewithsoilerodibility(k—factor)wasnotclose．Biologicalcrustcouldincreasesoilorganicmattercontentandsoi

7、lsiltscontents，whenbiologicalcrustreached6O，，itcoulda1soreducesoilerodibility(K—factor)．ThePearsoncorrelationsoftheindicatorsofEPICmodelshowdthatthecorrelationofsoilerodibility(K—factor)withsandcontentswasobviouslynegaUve，butwn．nshowedDositivewithsiltscontents

8、andclaycontents．CorrelationofK—factorwithorgamccarboncontentwasnotsignificant．．————一一Kevwords：soilerodibility(K—factor)；LeigongMoutain；foresttype；slope；biologicalcrust；EPICmodel行为顺