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1、西南农业大学硕士学位论文metalsintheareaWiththebasicquality'sindexesofthenutritioncontentofwater,Vc,solublesugar,aminoacid,wholeprotein,totalphosphorus,totalkaliumandtheindexesofmicroetementnutr记ntsubstanceofFe,Mn,Cu,Zn,Ca,MgandS,comprehensivelycomparisonswiththegenericumorous
2、stemmustard,Chinesecabbageandstemofluttucewasdidinthispaper.ItshowedthatthequalityofstemwasbeterthantheaveragequalityofitinChongqing.And,bytheindexesofnutrientsubstance,iwasalsoshowedthatitwasbeterthanluttuceandChinesecabbageinPandKThecontentofMn,FeandMginstemwasa
3、bundant,whilethecontentofCa,CuandZnwaslower.Thecontentofnitratewaswhollylowerinstem,which73.3percentbelongedtogoodleveland26.7percenttocommon.ThecontentofheavymetalswaswhollylowersuchasHg,As,CdandPh,whiletheaveragecontentofCrwasinmoredangerouslevel(0.39mg.kg1).The
4、investigationalsoshowedthatdiferentcapabilityofheavymetalsaccumulationwasinstem.ThedistinctionwasCd>H护Cr>Pb>As.Respectively,thediferentqualitiesonstemwereshowedwiththediversewaysofusingsoilinthisstudy.Therehadnodistinctefectsonstemfromthequalitiesofenvironmentwhol
5、ly.Nevertheless,thecontentoforganicandCuinwaterinfluencedbasicnutrientsubstancetosomeextend.A[so,somerelationsbetweenpH,contentoffluorine,Asinwaterandheavymetalsinstemwasshowedtoo.Thereweresignificantcoeficientsbetweenthecontentofsomenutrientsubstanceinstemandsome
6、indexesofthequalityofsoil.Byregressionanalysis,therelationshipofthecontentofKinstemandthequalityofsoilcanhedescribedbyanequation,whichdetermined妙thecontentofNandKinsoilandthecontentofKinsoilcontributedmosttoitwith0.429**.ThecontentofPinstemwasdeterminedbytheconten
7、tofPinsoilwiththecontributedcoeficientfor0.508**inthedescribedequitation.Therelationofcontaminationinstemtothequalityofsoilwasnotsignificantwholly.However,thecorrelationbetweenthecontentofCdinsoilandthecontentofCrinstemwassignificant,andthelinearcorrelationcoeffic
8、ientwas-0.516.Bycomparedthestem'saccumulationcoefficientsinplant-soil,theresultsshowedthattheheavymetalinstemmainlyrootedinsoilinthisstudy.Theresultssho
