不同林龄梭梭叶片－枯落物－土壤碳氮磷生态化学计量特征

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中图分类号：S718.5 文献标志码：A 文章编号：1673-923X（2026）02-0111-13

Abstract：【Obectie】oeealthangsistoicometryharacteristicsofleaf-litersoilinteractiosofHaloxylonmmodedron plantationsandtheir influencing mechanisms.【Method】Using Haloxylonammodendron plantations withdiferentstandages （3， 6，11，16and35yearsold）intheJilantaidesertareaofInerMongoliaasthestudyojects，thechangesincarbon（C）itrogen （N） phosphorustrinloylmmodendns，itedlandhteratiossealed【ule resultsshowedthat：1）Standagehadasignificanteffctonleaf，literandsoilC，NandPcontentsandstoichiometricratios （P<0.05 ）

Theaveragebonrogenndspostetsfloylonmmodendrones，itedlreindea > litter > soil. The C：N C：P and N：P were in the order oflitter > leaves > soil;2） At the depth of 0-20cm ，soil C：N was significantly negatively correlated with leaf C：N and C：P， and extremely significantly negatively correlated with litter C：p and ΔN：P soil C：P was significantly negatively correlated with leaf C ：N， C：P， litter C：P and ΔN：P and soil ΔN：P was significantly negatively correlated with litterC：P.SoilC：N， C：P， and ΔN：P werenot significantly correlated with leaf/litter C：N C：P，and ΔN：P at 20-60cm （2 soildepth;3）Limitingfactorsforliterandleaves wereinconsistentbetweenshallowanddeepsoils.At thedepthof 0-20cm ，soil C：P and pHwere important factors affecting nutrient content and stoichiometry of Haloxylon ammodendron leaves; soil C：N and soil bulk density （BD）were importantfactorsaffectingnutrientcontentandstoichiometryofHaloxylonammodendron liter.Atthedepthof 20-60cm soil total nitrogen （STN） and were important factors affcting nutrient content and stoichiometry of Haloxylon ammodendron leaves andliterespecively【Conclusion】esearchsultsareenefialforfurtherclarifingthteractionpatesandmecnisf carbon，itrogen，andposphorusinteleaf-litersoilinteractionsofHaloxylonammodendronplantationsindetareas. Keywords：Haloxylonammodendron;standage，ecologicalstoichiometry;nutrientlimitation;desertregion;Jilatai

生态化学计量是研究生物地球化学过程中的能量平衡和元素限制的重要科学[1。（剩余22443字）