| Dissolved organic matter in relation to nutrients (N and P) and heavy metals in surface runoff water as affected by temporal variation and land uses - A case study from Indian River Area, south Florid | |
| Yuangen; Yang; Zhenli; He; Yanbo; Wang; Jinghua Fan; Zhanbei Liang; PeterJ.Stoffella | |
| 2013 | |
| 发表期刊 | Agricultural Water Management
 |
| 卷号 | 118页码:38-49 |
| 摘要 |
Transportofdissolvedorganicmatterinrunoffwaterplaysacriticalroleintheincreasedinputsofnutrients(NandP)andmetals(Fe,CuandZn)inwater,andthedepositionofmucksedimentsintheSaintLucieEstuaryandIndianRiverLagoon,Florida.Theobjectivesofthisstudyweretoinvestigatethevariationofdissolvedorganiccarbon(DOC)anddissolvednitrogen(DN)insurfacerunoffwaterwithvaryinglanduses,andtoexploretheirpossiblerelationswiththeleachinglossesofnutrientsNandP,andmetalsFe,Cu,andZnfromdifferentlanduses.Forthis,surfacerunoffwaterfromtwomajoragriculturalproductionsystems(citrusgroveandvegetablefarm)insouthFloridawascollectedweeklyusingpre-installedautosamplersduringJan.2008–Mar.2010.Meanwhile,runoffwaterfromtwelvefieldsiteswithvaryinglanduses(suchasranch,golfcourse,andforest)wascollectedmonthlyusingagrabsamplerfromAug.2008toApril,2010,andsoilswerecollectedatthedepthof0–15cmand15–30cmtwiceayearfromautosampler-installedlocationsandonNov.25th,2008fromgrabsamplinglocationsaswell.Inthefield,watersamplesweremeasuredforelectricalconductivity,dissolvedoxygen,andtemperature;inthelaboratory,watersampleswereanalyzedforpH,totalsolids,turbidity,DOC,DN,totalP(TP),andmetalsCu,FeandZnwithorwithoutpassinga0.45mfiltermembrane.Afterpassinga2mmsieve,freshsoilsampleswereanalyzedformoisture,pH,electricalconductivity,0.5MK2SO4solutionextractableDOC/DN,andMehlich3extractableP,Fe,Cu,andZn.SpatialandtemporalvariationsintheconcentrationsofDOCandDNinrunoffwaterwereobserved,withthegreatestaverageconcentrationsofDOCandDNfromranch(∼28and∼2.3mgL−1)andthelowestfromgolfcourse(∼16mgL−1)forDOCandfromforestandnurseryforDN(∼1.5–1.6mgL−1),respectively.TemporalfluctuationsofDOCandDNinrunoffwaterfromvaryinglanduseswereingoodaccordwithrainfallintensityandfrequencyofrainfall.TemporalvariationsofTPandmetalsFe,Cu,andZnwereinfluencedbyclimaticconditionaswell.CitrusgroveexportedgreateramountsofDOCandDNinrunoffwater(27.6and3.51mgL−1ofmedianvalue)thanvegetablefarms(13.8and2.26mgL−1ofmedianvalue).AnnualcumulativeloadsofDOCandtotalNin2008,2009or2010were>20kgha−1,greaterthanthoseofTP(<13.5kgha−1)andmetalsFe,Cu,andZn(<1.5kgha−1).RanchsoilhadthehighestextractableDOCconcentration(>100mgkg−1),accountingfor1%ofitstotalorganiccarbon.SoilextractableDNhadsignificantcorrelationswithextractablePandCu/Zninsoils.Inconclusion,soiltotalorganiccarbonpoolanditsavailabilityhadanimportanteffectonDOCandDNinrunoffwater.LandusetypeandrainfalleventwerethetwoinfluentialfactorsaffectingconcentrationsofDOCandDN,andtheexportofnutrientsNandP,andmetalsinrunoffwater. |
| 关键词 | Agricultural Fields golf Course ranch dissolve Dorganic Carbon water Flow watershed |
| 收录类别 | SCI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/11111 |
| 专题 | 环境地球化学国家重点实验室 |
| 作者单位 | 1.University of Florida,IFAS,Indian River Research and Education Center,2199 South Rock Road,Fort Pierce,FL34945,USA 2.Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China |
| 推荐引用方式 GB/T 7714 | Yuangen；Yang；Zhenli；He；Yanbo；Wang；Jinghua Fan；Zhanbei Liang；PeterJ.Stoffella. Dissolved organic matter in relation to nutrients (N and P) and heavy metals in surface runoff water as affected by temporal variation and land uses - A case study from Indian River Area, south Florid[J]. Agricultural Water Management,2013,118:38-49. |
| APA | Yuangen；Yang；Zhenli；He；Yanbo；Wang；Jinghua Fan；Zhanbei Liang；PeterJ.Stoffella.(2013).Dissolved organic matter in relation to nutrients (N and P) and heavy metals in surface runoff water as affected by temporal variation and land uses - A case study from Indian River Area, south Florid.Agricultural Water Management,118,38-49. |
| MLA | Yuangen；Yang；Zhenli；He；Yanbo；Wang；Jinghua Fan；Zhanbei Liang；PeterJ.Stoffella."Dissolved organic matter in relation to nutrients (N and P) and heavy metals in surface runoff water as affected by temporal variation and land uses - A case study from Indian River Area, south Florid".Agricultural Water Management 118(2013):38-49. |
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