污水灌溉對(duì)作物和土壤的影響研究.pdf

1、分類(lèi)號(hào)：墨至2：壘UDC：魚(yú)圣圣密級(jí)：壘玨級(jí)一一學(xué)校代碼：10712研究生學(xué)號(hào)：SY20040628西蛙農(nóng)林針捉大學(xué)2007屆攻讀碩士學(xué)位研究生學(xué)位(畢業(yè))論文污水灌溉對(duì)作物和土壤的影響研究學(xué)科專(zhuān)業(yè)農(nóng)業(yè)水土工程研究方向節(jié)水灌溉理論與新技術(shù)研究生鐘凌指導(dǎo)教師蔡煥杰教授完成時(shí)間2007年6月中國(guó)陜西楊凌SE黝GEIRRIGATIONONCROPANDSOILABSTRACTInrecentyears，boththeshortageandth

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5、metalinsidecropsshowsthatthenumberinnerspringwheatale嬲f(shuō)ollowing，PbCrwhilethenumberislargestinrootBesidesthatthereismuchmoreheavymetalinthepartsofflowerleafandrootthaninthestemandseedAfterIrrigation(heavymetalcontentsarel

6、essinsewagewater)heavymetalallfallsofftOSOmeextentinsoil，thePb，Craccumulationarerelatedtothekindoffoulwaterinthemaizeandthewheat；Thefoulwatereffectphysiologyofthemaizeandthewheat，broadirrigationmaypossiblymakeoutputincre

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8、irrigationinitialstagetransfusioneffectplaysmainroleforsoilmiddleCuionconcentrationdistribution，theCuionishitbythepromptirradiationwithsoiltransfusioninsoil；Later，thetransfusioneffectarenotalreadynotable，distributionofCu