污水灌溉條件下冬小麥生長及重金屬分布規(guī)律的試驗研究.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文污水灌溉條件下冬小麥生長及重金屬分布規(guī)律的試驗研究姓名：邵洪波申請學(xué)位級別：碩士專業(yè)：農(nóng)業(yè)水土工程指導(dǎo)教師：馮紹元2002.3.1AbstractFieIdexDerimentandindoorexperimenthavebeendonetesearchontheeffectofsewagelrrtgationonwinterwheatgrowthandheavymetaldistributioninthisth

2、esisinBeijingSeveralCUlICIUSiOUSllavebeendrawnasfclllows：1Tileresultsundersewageirrigationcomparedtofleshirrigationindicateastbllows：(1)IheDroductionofwheatisincreasedby96％undersewageirrigation；(2)drymatterandleafareaind

3、exof’tilewheatismuchhigherduringnourishmentgrowthstage，whiledrymatterandleafilreaindexofthewheatunderfleshtreatmentissignificantlowerduringproductivegrowthstage；13)heavemetalfromswageenrichedinthesoilstratuminthedepthof0

4、430cm，andtilerootlengthundersewagetreatmentlslargerthanthattinderfreshtreatment一2，TheresidualquantityofheavymetalsuchasLead，ArsenicandCadminm，isnmchdd、Ierentindifferentpartofthecrop，whichintherootishigherthatinthestalkan

5、dleave，which111thesDkeisthelowestSoitisconsideredthatrOOtwhichactasasortofbarrierretardstileupwardstransfo／TOofheavymeta】suchasLead，ArsenicandCadmium，andprotectstileovergroundpartsofthecropfromtoxinHeavymetalconcentratio

6、ninthespikeofwheatmeetstheNationalFoodSanitationStandard3ApplianceschemeofwinterwheatsewageirrigationtechnologyiscontingentonthewatersupplyofirrigationareaandtheconsequenceofwateroptimizingintyptcalyearThel_ecommendatory

7、sewageirrigationschemeofwinterwheat，inthetypicalyearof50％，isthreetUlleS’irrigation：irrigationpriortoinsemination，winterirrigation，andJointiugirrigation，theleve[1s604040m3respectivelywhichisnominatedas“scheme一644”forshonT

8、herecommendatorysewageirrigationschemeinthetypicalyearof75％，isfourtimes’：irrigationpriortoinsemination，winterirrigation，jointingirrigationandtasselirrigation，thelevelis604040，40m’respectivelywhichisnominatedas“scheme6444

9、”forshort4Cadmiumsorptionexperimentindicatedthatthesorptionisotherisalinearcurvewhenvariablc00lppm5SaturatedexperimentofcadmiumionindicatedthatconsistencyofCadmiuminsurfacesolutionisdynamicmovementwithsorptioninsurfaceso

10、il，andconsistencyofsorptionisreduced、、tthdistributingdepthincreasingTheresultsofunsaturatedexperimentisthatthequantityofCadmiumsorptioninsoiliscorrelativewithraw—solutionconsistency，buttherelationisunlinearbetweenthequan