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不同经营措施下桉树人工林土壤肥力质量演变及代谢产物特征研究.docx

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不同经营措施下桉树人工林土壤肥力质量演变及代谢产物特征研究 【Abstract】Thesoilfertilityqualityevolutionandmetabolicproductcharacteristicsofpoplarplantationunderdifferentmanagementmeasureswerestudiedtoprovidetheoreticalbasisforsustainabledevelopmentandmanagementofartificialpoplarplantation. 【Keywords】poplarplantation;soilfertilityquality;metabolicproductcharacteristics 1.Introduction Asanimportanttimbertreespecies,poplariswidelyplantedfortimberproductionandecologicalrestoration.However,thecontinuousexploitationandimpropermanagementofpoplarplantationhaveledtoadeclineinsoilfertilityandecologicalenvironmentdegradation.Therefore,itisofgreatsignificancetostudytheevolutionofsoilfertilityqualityandmetabolicproductcharacteristicsunderdifferentmanagementmeasuresinpoplarplantation. 2.MaterialsandMethods 2.1Studysite Thestudysiteislocatedinapoplarplantationinacertainregion.TheclimaticconditionsareXX,withanannualaveragetemperatureofXX℃andanannualprecipitationofXXmm. 2.2Experimentaldesign Fourdifferentmanagementmeasuresweresetinthepoplarplantation:A)traditionalmanagement(nofertilizationormanagementmeasures);B)chemicalfertilizationmanagement(applicationofnitrogen,phosphorus,potassiumfertilizers);C)organicfertilizationmanagement(applicationoforganicfertilizers);D)integratedmanagement(combinationofchemicalandorganicfertilization). 2.3Samplecollection Soilsampleswerecollectedatdifferentdepths(0-10cm,10-20cm,20-40cm)ineachmanagementmeasureplot.Eachplothadthreereplicatesamples.Thesampleswerethenanalyzedforsoilphysicalandchemicalproperties,suchassoilorganicmatter,totalnitrogen,availablephosphorus,availablepotassium,pH,etc. 2.4Metabolicproductcharacterization Metabolicproductsinsoilwerecharacterizedusingtechniquessuchasgaschromatography-massspectrometry(GC-MS)andliquidchromatography-massspectrometry(LC-MS).Themetabolicproductsmainlyincludedorganicacids,phenoliccompounds,andaminoacids. 3.ResultsandDiscussion 3.1Soilfertilityqualityevolution Theresultsshowedthatthesoilorganicmattercontent,totalnitrogencontent,availablep