土壤容重数据的不确定性对有机碳密度估算的影响.pdf

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TheInfluenceoftheUncertaintyCausedbySoilBulkDensityon
SoilOrganicCarbonDensityCalculation
LIXiuzhi1, HUCongyue1, WANGDecai2, HANGuangzhong1
(,NeijiangNormalUniversity,Neijiang641112,Sichuan;
,HenanAgriculturalUniversity,Zhengzhou,450002,Henan)
Abstract:Soilbulkdensityisoneofmostimportantphysicalpropertiesofsoilandisanessentialparameterinsoilorganiccarbon
density(SOCD),therearesomeuncertaintiesintheestimationanddeterminationofsoilbulkdensityin
China,
thisstudy,wecollectedsoildataformajortypesofsoilsinChinafromtheSecondNationalSoilSurveyofChina,thedatabaseforthe
ChineseSoilTaxonomyandsoilsurveydataoftypicalareasinordertoexploretheuncertaintyofsoilbulkdensityanditsinfluenceon
:first,aseriouslackof
bulkdensitydataintheexistingsoildatabase;secondly,themeasurementdeviationcausedbysomenonsoilsubstances,suchasgrav

rootanditsover/under
ingsoilbulkdensitypredictedfromPTFsortheemendationofsoilbulkdensitybyintroducingcorrectionparametersproposedinthis
papertoisolatetheeffectofgravelorrootsignificantlyimprovedtheperformanceofSOCDmodels.
Keywords:soilbulkdensity;uncertainty;soilorganiccarbondensity;gravel;root
(EF GHI)