贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2014年
7期
64-67,72
,共5页
吴小波%王震洪%何建敏%曹荣权
吳小波%王震洪%何建敏%曹榮權
오소파%왕진홍%하건민%조영권
土壤可蚀性K值%雷公山%森林类型%坡度%生物结皮%EPIC模型
土壤可蝕性K值%雷公山%森林類型%坡度%生物結皮%EPIC模型
토양가식성K치%뢰공산%삼림류형%파도%생물결피%EPIC모형
soil erodibility(K-factor)%Leigong Moutain%forest type%slope%biological crust%EPIC model
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值进行估算,同时分析了土壤可蚀性 K 值的影响因素。结果表明:4种森林类型土壤可蚀性 K 值的变化范围为0.278~0.303,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值大小顺序为乔木林>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相关系数为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%时可降低土壤可蚀性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,与粉砂含量呈极显著正相关,与粘粒含量呈显著正相关,与有机碳含量相关性不显著。
為揭示雷公山土壤可蝕性狀況,採用EPIC模型對雷公山4種森林類型土壤可蝕性 K值進行估算,同時分析瞭土壤可蝕性 K 值的影響因素。結果錶明:4種森林類型土壤可蝕性 K 值的變化範圍為0.278~0.303,K值的變異繫數均小于10%,空間變異性為弱變異性;4種森林類型土壤可蝕性 K值大小順序為喬木林>喬灌過渡林>灌木林≈馬尾鬆林;樣方坡度在17°~31°,坡度與土壤可蝕性K值的Pearson相關繫數為0.017,線性相關不密切;生物結皮可增加土壤有機質含量、粉砂含量,噹生物結皮達到60%時可降低土壤可蝕性K值;EPIC模型指標的相關分析錶明,可蝕性 K值與砂粒含量呈極顯著負相關,與粉砂含量呈極顯著正相關,與粘粒含量呈顯著正相關,與有機碳含量相關性不顯著。
위게시뢰공산토양가식성상황,채용EPIC모형대뢰공산4충삼림류형토양가식성 K치진행고산,동시분석료토양가식성 K 치적영향인소。결과표명:4충삼림류형토양가식성 K 치적변화범위위0.278~0.303,K치적변이계수균소우10%,공간변이성위약변이성;4충삼림류형토양가식성 K치대소순서위교목림>교관과도림>관목림≈마미송림;양방파도재17°~31°,파도여토양가식성K치적Pearson상관계수위0.017,선성상관불밀절;생물결피가증가토양유궤질함량、분사함량,당생물결피체도60%시가강저토양가식성K치;EPIC모형지표적상관분석표명,가식성 K치여사립함량정겁현저부상관,여분사함량정겁현저정상관,여점립함량정현저정상관,여유궤탄함량상관성불현저。
In order to reveal the condition of the soil erodibility in Leigong Moutain,EPIC model was used to estimate the soil erodibility(K-factor)of four forest types in Leigong Moutain,and the influencing factors of soil erodibility was also analyzed.Results:The spatial variability of soil erodibility(k-factor)of those four forest types was relatively weak,with the range from 0.278 to 0.303,and the variance coefficient was less than 10%.The size of soil erodibility(K-factor)of those four forest types presented the order:Arbor land > shrub-tree transitional forest> shrub land≈Pinusmassoniana forest.The range of slope was 17~ 31°,the Pearson correlation coefficient of slope with soil erodibility(k-factor)was 0.017, but the linear correlation of slope with soil erodibility (k-factor)was not close.Biological crust could increase soil organic matter content and soil silts contents,when biological crust reached 60%,it could also reduce soil erodibility(K-factor).The Pearson correlations of the indicators of EPIC model showed that the correlation of soil erodibility(K-factor)with sand contents was obviously negative,but which showed positive with silts contents and clay contents.Correlation of K-factor with organic carbon content was not significant.