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＊(:39270442)(:93-Ⅱ-041)、＊宋祥甫 邹国燕 吴伟明 金千瑜 应火冬(,310006) ,,(KNTP2.0840.248mg/L),,N、P,,,.,1.4m,20%、40%、60%,84,KN29.0%、49.8%58.7%,TP32.1%、42.0%49.1%.. ;;;、.,,、,,,.,90%[1],,[2].,[3,4],,[5],.[6],,(),.,[7,8],、、,、,,N、P,,,,,1993,[9,10].,,,(,)———N、P,.1 1.1 (,1),、、4m×3m×1.5m(),18m3,12m2.1.4m,18519989 ACTASCIENTIAECIRCUMSTANTIAEVol.18,No.5Sept.,1998DOI:10.13671/j.hjkxxb.1998.05.00816000L.1 Fig.1 Sketchmapoftheexperimentalfacilities1.2 ,KN()、TP()2.0840.248mg/L.46.1.3 (,)20%、40%、60%(6850、3325、2300L)4.1.4 19947—10.61(),74[7],20cm×15cm,,.720,2.721.1.5 、;KN、TP、pH、COND()、TM()、TURB()、DO()、CODMn()、BOD5()、SS()10(KN、TP,).14,.84.1.6 ,;,.40cm(5),.KN、TP.2 2.1 (1),,1 Table1 Comparativestudyontheyieldsandmaincommercialcharacteristicsofriceonfloating-bedswithdifferentcoveragerates＊,%,/,cm,g/m2,g/m2(1)(2)(1+2)＊＊2023.094.0486.21070.0235.91305.9980.74022.293.0430.7991.1205.01196.1870.96021.091.0386.3919.1149.11069.0743.8 ＊;＊＊490 18434.4g/m21190.3g/m2.,,,,,20%60%,25.9%22.2%.N、P,N、P,,60%KNTP4.71g0.57g,20%14.03g1.7g.2.2 KNTP 23,(2 KNTable2 ComparativestudyontheremovalrateofKNbyriceonfloating-bedswithdifferentcoveragerates,%,L/KN,mg/Lg/KN,mg/L＊g/KN,g/g/m2＊＊＊＊＊,%016260141002.04833.8862.34433.0500.835— 02016440135002.04834.2611.74023.49010.7714.48829.04015960128002.04833.2611.23115.85517.4053.62649.86016560131402.04834.5111.02113.41621.0952.93058.7 ＊ ;＊＊KN;＊＊＊KN.3 TP＊Table3 ComparativestudyontheremovalrateofTPbyriceonfloating-bedswithdifferentcoveragerates,%,L/TP,mg/Lg/TP,mg/Lg/TP,g/g/m2,%016260141000.2484.0330.2854.0190.014—0 2016440135000.2484.0770.2042.7541.3230.55232.14015960128800.2483.9580.1772.2801.6780.35042.06016560131400.2484.1070.1582.0762.0310.32049.1 ＊2)、———N、P[11],,,KNTP,(),60%KNTP,58.7%49.1%,20%29.0%32.1%.KNTP,,,60%KNTP2.93g0.32g,20%4.488g0.522g.,N、P,,,.4915:、———,,,、、,[3,6],,,,N、P,,KN、TP[3,6],,,.2.3 KNTP2 KNFig.2 ComparisonbetweenofKNconcentrationsinwaterwithdifferentcoverageratesoffloating-beds3 TPFig.3 ComparisonbetweenofTPconcentrationsinwaterwithdifferentcoverageratesoffloating-beds23,,()KNTP,、、,TP.KNTP,KNTP,,KNTP,KNTP.,KNTP、、,,,N()PKN、TP,KNTP;,N、P,KNTP,N、PN、P,N、PKNTP,N、P,N、P,,,KNTP,N、P(4、5,2).,N、P,492 18、、,(2,3).4 NFig.4 Comparisonofthedynamicofnitrogenaccumulationinriceplantsonfloating-bedsatdifferentcoveragerates5 PFig.5 Comparisonofthedynamicofphosphoraccumulationinriceplantsonfloating-bedsatdifferentcoveragerates3 ,,、(),,,,———N、P,,,,,,,,.,,,,、,,,.,,,,,,.1 ..,1993,1(1):1—232 ....:,1990:1—123 ,,..,1989,9(2):188—1954 ,,.11.,1995,11(1):26—295 RiemerDN.Introductiontofreshwatervegetation.Westport:AVI,1984:696 ,, ..,1996,41(6):547—5514935:、7 ,, ..,1991,24(4):8—138 ,,..,1996,10(4):227—2349 ,,..,1993:48—4910 Xiangfusong,WaichiAgata,GuoyanZouetal.Bio-productionandwatercleaningbyplantgrownwithfloatingculturesys-tem.6thInternationalConferenceontheConservationandManagementofLakeKasumigaura'95,1995:426—42911 , ....:,1990:13—24STUDYONTHEREMOVALEFFECTANDREGULATIONOFRICEPLANTSONFLOATING-BEDSTOMAINNUTRIENTSNANDPINEUTROPHICATEDWATERBODIESSongXiangfu,ZouGuoyan,WuWeiming,JinQanyu,YengHuodong(ChinaNationalRiceResearchInstitute,Hangzhou 310006)ABSTRACT Experimentswerecarriedoutinartificially-eutrophicatedwaterbodiesincementpondswiththeconcentrationsofTPat0.248mg/LandKNat2.084mg/Landwithoutanyinterferencefromnaturalenvironment.Onthesurface,ricewastransplantedonfloating-bedsforthepurposeofremovingnutrientsfromwaterbyadsorptionofricerootssothatexcessivenutrientscouldbeutilizedusefully.Atthemeantime,watercouldbepurifiedandthebenignrecyclingofwaterbodiescouldbemaintained.Whenthefloating-bedcoverageratesweresetupat20%,40%and60%inabout1.4mofwaterdepth,fortheperiodof84daysfromtelleringtoharveststage,theremovalratesofTPandKNinwaterreached32.1%,42.0%and49.1%,29.0%,49.8%and58.7%,respectively.Theresultsshowthatthede-signisnotonlyfeasiblebutalsoeffective,providingthescientificbasisforapplyingterrestrialeconomicplantsonflaotingbedstopurifyeutrophicatedwaterbodies.Keywords rice,floating-beds,eutrophicatedwaterbody,N,P,removalefficiencies.1997-01-081997-09-29494 18