酰胺類除草劑對土壤微生物活性的影響以及P450對酰胺類除草劑的降解行為研究.pdf

1、浙江大學(xué)碩士學(xué)位論文酰胺類除草劑對土壤微生物活性的影響以及P450對酰胺類除草劑的降解行為研究姓名：邵波申請學(xué)位級別：碩士專業(yè)：環(huán)境科學(xué)指導(dǎo)教師：劉維屏2003.5.1⑧浙江大學(xué)碩十學(xué)位論文ABSTRACTInfluenceofChloroacetanilideherbicidespretilachlor，butachloracetochlorandmetoalchloronsoilcatalaseandpolyphenoloxidas

2、eactivitieswasinvestigatedatconcentrationofO、1、10、50、100pg昏1respectivelyResetsshowthatherbicideshavedifferenteffectsonthistwosoilenzymes，theyhavestrongereffectoncatalasethanonpolyphenoloxidase，particularlyforpretilachlor

3、；thehigherconcentrationofherbicidesthemoreeffecttolandenzymeSowecallusecatalaseaSindexenzyme，toexploreandjudgetheeffectofpesticidetosoilecologicalenvironmentTheeffectsofthesefourChloroacetanilideherbicidestosoilrespirati

4、onwerealsostudiedinthispaperResultsshowthatsoilrespirationhadhighsensitivitytofourChloroaeetanilideherbicidesAtthebeginningofapplysoilrespirationwasinhibitedbytheherbicidess仃onglyinhibitiondegreeis220％352％Thesoilrespirat

5、ionCanrecovergraduallyandalsoshowsomestimulationeffect，andtheyhavenoapparenteffectafter34daysJudgingbysoilrespirationwecanconcludethatChloroacetanilideherbicidesarelowtoxicityornoactualharmnesspesticideinotherwordsthatth

6、eyarealmostharmlesstosoilmicroorganismCytochromeP450wasextractedfromrice，andmetabolickineticsofcytochromeP450tobutachlormetoalchlorandtheirenantiomersalestudiedTheresultsshowthatcytochromeP450candegradebutachlormetoalchl

7、orandtheirenantiomersrapidlythedegradationhalflifetimebetween1468to15052minThedegradationratelowerasthepesticideconcentrationhigher(20pgml～，30pgml’1and40pgml。1)，thecorrespondinghalflifetimelongerThedegradationrateofthese