多菌靈在土壤中的降解、吸附和移動(dòng)性.pdf

1、浙江大學(xué)農(nóng)業(yè)與生物技術(shù)學(xué)院碩士學(xué)位論文多菌靈在土壤中的降解、吸附和移動(dòng)性姓名：宋敏申請學(xué)位級(jí)別：碩士專業(yè)：農(nóng)藥學(xué)指導(dǎo)教師：虞云龍20100101AbstractCarbendazimisarepresentativebenzimidazoliccompoundToevaluatethesafetyofcarbendazimapplication，studieswereconductedonaccumulationanddegradati

2、onrateofcarbendaziminsoilsafteritsrepeatedapplicationsindifferentconcentrations，itsadsorptiondesorptionandmobilityonfivesoilsfromZhejiang，ChinaandthemaininfluencefactorsTheresultsweresummarizedasfollows：Theresidualconcen

3、trationsofcarbendazimweremeasuredtobe1014，0427，0278O169mg／kgatthelevelof094aikg／ha，1325，0727，0660，0641mg／kgatthelevelof188aikg／ha，4712，2409，1668，1531mg／kgatthelevelof470aikg／ha。respectively15dafterfirst，second，third，four

4、thcarbendazimapplicationsTheresultsindicatedaccumulationofcarbendaziminsoilwasnotobservedandthedegradationratewasenhancedwiththeincreasingofapplicationtimesThehalflivesfordegradationofcarbendazimweremeasuredtobe238，48，25

5、，24，O8dattheconcentrationof094aikg／ha，121，62，14，15，06dattheconcentrationof188aikg／ha，122，39，19，09，09dattheconcentrationof47aikg／ha，respectivelyTheresultsrevealedthatthedegradationhalflivesofcarbendazimweredecreasedwithit

6、sapplicationfrequencyAtinitialperiodofexperiments，repeatedcarbendazimapplicationscausedallenhanceofitsdegradation，andnosignificantdifferencebetweenalltreatmentsWasobservedthereafterTheadsorptionanddesorptionisothermsofca

7、rbendazimonallsoilscouldbedeScribedwellwiththeFreundlichequationTheK≯svaluesofcarbendaziminloam，heavyloam(Jiaxing)，mediumloam(Pan。a11)，heavyloam(Jinhua)，andsandyloamsoilsweremessedtobe202，183，170，912，and223，andthecorresp

8、onding蟛峪valueswere255，213，163，811and273，respectivelyTheresultsindicatedthatadsorptioncapacityoffivesoilstocarbendazimshowedanorderofloamheavyloam(Jiaxing)mediumloamheavyloam(Jinhua)sandyloamTheregressionanalysesshowedsoi

9、lorganicmattercontent(OM)andpHplayanimportantroleinadsorption—desorptionofcarbendazimonsoilsTheamountsofcarbendazimadsorbedonsoilswereincreasedwithincreasingOMTheeffectofpHonadsorptiondesorptionofcarbendazimonsoilswashi曲

10、lycorrelatedwithsoilOMTheadsorptionofcarbendazimwasdecreasedonloam，heavyloam(Jiaxing)andmediumloamsoilscontaininghighOM，andincreasedonheavyloam(Jinhua)andsandyloamsoilscontaininglowOM，withthedecreasingpHSimultaneouslythe