宁南山区土壤干燥化后不同人工林土壤-叶片-凋落物C、N、P化学计量特征

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中图分类号：S718.43 文献标志码：A 文章编号：1673-923X（2025）09-0141-10

Abstract：【Objective】Inordertoprovideareferenceforthereforestationofplantationforestandregionalecologicalconstruction aftersoildesiatioioticactestfbdousd insoilavlioogad thisstudylbsdoti Huiautonomousregionwereselected：Amygdalusdavidianapureforest，Caraganakorshinskii+AmygdalusdavidianaRobinia pseudoacaciaixedforest，oplarpureforest，Hppophaerhamnoidespureforestandpoplar+Hippophaehamnoidesixedforest andsampleswereakenfromfeldampleplotsndteontentsofoilflageapomorharbon（C）itrogen（Nndospou （P）weredeteredidoorsinthdiferentplantationsandthestoiciometricatioswerecalulated.【ResultSignifcantcoelations werefoudbetweesoil-apoo，ndtetiraganaohinskimygdalusdanRobna mixedforestandpoparpureforest;soilCcontentandC：Pvaluesweresignificantlyigherinmixedforesttaninpurforestndsoil NandPcontentasellasN：PvalueereghestinCaraganakorshinskii+AmygdalusdvidianaRobniapseudoacaciamixedforest. The C：PvalueandN：Pvalueofleavesanditer werethehighest inthepureforestofAmygdalusdavidiana pureforest，andleafand apoplasticN：PvalueweresignifcantlyigherthansoilialfveplantationforestTeN：valueofplantationforestundersoilring conditions was 4.89，which was higher than 34.3% of the N：P value under normal moisture conditions.【Conclusion】After soil drying， thegrowthofptationforstintgionisosphorusited，ndthelativeavlabilityofrogndcreasssoeed plantationmodelofpoplar+Hippophaehamnodesmaybemoresuitableforplantationforestintheregion.Itissugestedtoiprove soil structure and fertilityby adding organic materials in the mountainous area of Ningnan.

Keywords： C，N，Pcontent; soil; leaf，litter; stoichiometric characteristics;Ningnan mountainousarea

生态化学计量学（Ecological stoichiometry）是研究多元素平衡和系统能量循环的理论。（剩余14683字）