華北高產(chǎn)糧區(qū)土壤溫室氣體排放及碳氮平衡研究.pdf

1、中國農(nóng)業(yè)大學碩士學位論文華北高產(chǎn)糧區(qū)土壤溫室氣體排放及碳氮平衡研究姓名：高秀文申請學位級別：碩士專業(yè)：生態(tài)學指導教師：吳文良20030601’AbstractBecauseofthepopulation，plowlandandwaterresourceetc，thehighergrainoutputisstillveryimportantManyenvironmentproblemshaveappearedbecauseoftheexc

2、essiveapplicationofNfertilizerintheNorthernChinaPlainwithhighproductivi吼forexample，N20concentrationincreaseintheatmosphereBecauseofthedecompositionofsoilorganiccarbon，C02concentrationinatmospherehasalsoincreasedTheexperi

3、mentsitewaslocatedinHuantaiCountyofShandongProvinceSoilgreenhousegasesemissionandcarbonnitrogenbudgetintheagoeeosystemofthisregionwerestudiedbythemethodofonsitesurveyfieldexperimentandbiogeochemistrymodelsimulationTheres

4、earchresultsaleasfollows：IC02andN20emissionfromsoilinthegrainfieldsofthisregionchangedregularlywiththechangeoftheseasonThegasfluxeswerehighestinthesummerandlowestinthewinterThepeakvalueofC02fluxappearedinJuly30，anditwas3

5、3869‘m2d～TheC02emissionwasexponentiallycorrelatedwithairtemperatureandsoiltemperatureTherewasnoobviousrelationbetweenC02emissionandsoilmoistureThepealcvalueofN20fluxappearedinJune30，anditwas35l，31lag’mzh一Thesoilmoisturew

6、asthemostimportantinfluencefactorofN20Comparedwiththegrainfields，theseasonalchangeextentsweresmallerforC02andN20emissionintheprotectedvegetablesfieldsbecauseofthecomplicatedfarmlandmanagementandinnermicroclimate2TheDNDCm

7、odelresultscapturedtheseasonalchangecharacteroftwogreenhousegasesemissionTheMmulationresultswereinagreementwiththefielddataThecarbonnitrogenbudgetinthewholeregionwerealsosimulatedbyDNDC，andtheresultsshowedthetotalSOCstor

8、ageinNrmlandofHuantaiCountywas14x10’kgin2001andforeveryhectare，theaverageSOCstoragewas45I1521kg。hm～TheinputsofcarbonandnitrogenwerehigherthantheiroutputsFromthepointofsubstanabledevelopment，thisregionshouldincreasetheman