堆肥對土壤重金屬賦存形態(tài)及生物有效性的影響.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文堆肥對土壤重金屬賦存形態(tài)及生物有效性的影響姓名：吳飛龍申請學(xué)位級別：碩士專業(yè)：植物營養(yǎng)指導(dǎo)教師：蘇德純20070601AbstractThepotexperimentsWereappliedtostudytheeffectofcompostonspeciafionofCd、PbinsoilwhichinfluencedbioavailabilityundertheoiL∞edrapesricerotationan

2、dtwocroppingoilseedrapeswithaccumulatoroilseedrapeandnunaceumulatoroilseedrapesTheresultsshow：1Oilseedrapesricerotationexperiment(1)CompostdecreasedthebioavailabflityofCd、Pbinsoil，anddeclinedCd、PbuptakeofbothoiC∞gdrapesa

3、ndriceLaterbatchricehadlowerCd、Pbadsorption，whiletheformerbatchplantedoilseedrapesButitwasnosignificantdifferentofriceCd、Pbadsorptionwhiletheformerbatchwereaccumulatorornonaceumulatoroilseedrapes(2)SpeciafonofCd、Pbinsoil

4、hadchangedafterplantingoilseedrapesTheconcentrationsofacidextractableCd、PbandoxidizablePbinplantingoilseedrapesWefOsignificantlylowerthaninnoplantingoilseedrapesSpeciafionofCd、PbinsoilwasalsoinfluencedbyricegrowingAftcl“

5、ricegathered，theconcentrationsofreducibleCd、Pbnsailhaddeclined，aswhiletheconcentrationsofoxidizablePbhadincreased(3)CorrelationbetweenCd、PbuptakeofriceshootandsoilCA、Pbspeciationvariableaflergrowingoilseedrapeswereperfor

6、medTheresultsshowthatCduptakeofricehasthesignificantpositivecorrelationwithsoftacidextractableCd、PbhasthesignificantcorrelationwithsoiloxidizableCd，andhasthesignificantcorrelationwithsoilreduciblePb2Twocroppingoilseedrap

7、esexperiment(1)CompostdecreasedthebioavailabilityofCAinsoft，anddeclinedCduptakeofoilseedrapesBecausethespeciationofCdinsoilWasinfluencedbycompostTheconcentrationofreducibleCdinsoilhadincreasedwMletheconcentrationofacidex

8、tractableCdhaddeclined。(2)SpeciationofCdinsoilhadchangedaftertwocroppingoilseedrapesTheconcentrationofacidextractableCdinplantingoilseedrapesWaslowerthaninnoplantingoilseedrapeswhiletheconcentrationsofoxidizableandresidu