29草型湖泊沉水植物收割工程对生态改善的试验尚士友

196200311TransactionsoftheCSAEVol.19No.6Nov.2003,,,,,(,010018):,,:,,,,;,,,;,,,:;;;;:X171.4;S963.22:A:100226819(2003)0620095206:2003205216:2003208213:(30160022);(2002EC000128):,,,,0100181,,200211,30,,,,,,,,1999200389GSCC1.4H,,33km2,3850t(),63.525t6.545t,,1989,,,45m[1],9GSCC1.4,,,,,,,100%,()22.5kg/m2[2],,,,,,,,,,[3],,2,40474103N,1084310857E,1018.5m,2.53108m3,80%0.81.2m,293km2,19787104t199743.8104t,200252104t,30%35%,19702002,1.74mg/L,0.07mg/L,83.5[4],59(Potamogetonpectinatus)(Myriophyllumspicatum),,,100%,8.5104ta-1(),875gm-2()200197.5km2,96.2%,,,713mma-1360mm,,30199619871119871996TM(:km2)Table1AnalysisofdifferentsatelliteremotesensingregionsinLakeWuliangsuhai(1987and1996)km21987204206128.3194.8826.1921.0307.761996209205107.13112.9728.4624.761.1022.69-21.18+18.09+2.27+3.73+1.10+14.9333.19GSCC21.4H9GSCC21.4H,,,,3.1.11),,,2)0.62.5m,0.11m/s,,3.1.21),,:(6)(7),(9),2),3),,[5]3.1.39GSCC21.4H9GSCC21.4H,,:2.8km/h,1.4m,1.2m,6m,0.55m,1800m2/h,()9t/h,0,5%,14.7kW,9kg/hm2,5t115,()13t(),1201560t()9GSCC1.4H11.2.3.4.5.6.()7.8.9.19GSCC-1.4HFig.19GSCC-1.4Hhydrophytesreaper6920033.23.2.119992003,33km2,3850t(),63.525t6.545t510,120130d1,1,2,,82%,,13%17%,,,3.2.2,,,,:900900m2,,,0.7m,,30%,,713mma-123mma-14,1088.59t,65.75t;,759.9t,37.8t;328.7t,28.0t,2.03mg/L,0.38mg/L,2.8108m3,568.4t,106.4t,40.295t[6],140.2mg/L,0.02mg/L,512.4t,53.8t22Table2BalanceofTNandTPoflakeWuliangsuhaiswaterbodyandthecalculationoftransferringNandPbyharvestingaquaticplantsinrecentyearst5104tTN568.41088.6759.9328.7512.4841.1825TP59.465.837.828.053.881.885,,,(),(Potamogetonpectinatus)1.65%,0.17%,5104t()825t85t,80.31%89.82%[7],5104t(),662.56t,76.35t,,,4104t()49%,83.8t[8],3.194104t()[9],::(1);(2),5796:,,2001,65050m2,33(0.7m)Table3Contrastexperimentrecordofharvestingaquaticplants(thecutteris0.7meterbelowthewatersurface)/2/DW/m/1#052261.600.97062270.650.815082203.020.721,8%102243.751.162#062273.530.815102243.751.163#052261.520.97102243.751.164#102243.751.165#082203.320.721,8%102243.751.166#072213.460.720,8%102243.751.16:10246,110gm-2(),,,,,,,0.7m,0.7m,,,,,,,,610,60%,,,,,0.35m2,2%4%,,,,,75%,,1m,198945%,199995%,,,,,,[1],,,5560d,23,2002610,1483116gm-2(),,,,,,6,,,,8.5104ta-1(),60%,5104t()15.25%,13.35%,,,,,[10],,,4,22Fig.2Flowchartofproductionofhydrophytesfeedstuff8920034Table4Contrastofnutrientelementsbetweenafewkindsofsubmergedplant,lucerneandgreenhay%8.7515.252.1823.5714.826.670.1635.257.2516.602.9521.7716.867.890.3534.57()9.5515.141.2634.436.571.410.3133.06()9.337.922.5533.744.820.760.1241.6471),,8.5104t(),,,,9GSCC1.4H,80%,2)4.6108m3(),,,,,512.4t53.8t(),328.7t28t,5104t()825t85t,,3),5560d,2,,4),359GSCC1.4H,5104t(),1750,806,,108104ta-1(),,3.78,5),,,[][1],,,.[M].:,2001,120145.[2],,.[J].(),1998,4(8):970972.[3],.[J].,1999,10(1):109112.[4],,,.[M].:,1990,509512.[5],,,.[J].,1998,14(4):119123.[6].[J].,2002,24(1):5458.[7],.()[J].,1997,10(4):3435.[8],,.[J].,2002,23(4):8183.[9],,.[J].,2002,23(3):8084.[10],,.[J].,1997,18(1):6165.996:ExperimentalstudyonimprovingecologicalconditionsthroughharvestingsubmergedplantsinavegetationrichlakeShangShiyou,DuJianmin,LiXuying,ShenQingtai,Houfuxiang,WuLibin(CollegeofMechanicalandElectricalEngineeringofInnerMongoliaAgriculturalUniversity,Huhhot010018,China)Abstract:Theexperimentwasconductedbysettinguparesearchsiteinatypicalvegetationrichlake,lakeWuliangsuhaiinIn2nerMongolia,andcarryingoutafairlylargescaleharvestingprojectofthesubmergedvegetation.ExperimentalresultsshowedthatharvestingsubmergedvegetationandtransferringtheelementalnutrientsNandPwillslowtheaccumulationofinternalnutri2entloadsoflakesandwillmaketheinputandoutputoftheelementalnutrientsgraduallycomeintobalance.Thistechniqueno2ticeablypreventedBioaccumulationandisakeytechniqueinreducingeutrophicationofvegetationrichlakes.Thesystematichar2vestingofsubmergedvegetationguaranteesthefunctionofimprovingwaterqualitybysubmergedvegetationanddoesnotresultinalgaeoverfloworinfluencethereproductionofsubmergedvegetation.Thetechniqueofharvestingsubmergedvegetationandtrans2ferringtheelementalnutrientsofNandPcancontinueindefinitely.Whileharvestsubmergedvegetation,biologicalrestorationcanalsobeaccomplished.Atthesametime,agoodsourceofhigh2proteinhydrophyteanimalfeedisrealized.Thistechniqueal2lowsforharmonybetweenlakemanagementanddevelopmentofaquaticresourceswhilealsopromotingsustainabledevelopmentoftheenvironmentandtheregionaleconomy.Keywords:vegetationrichlake;LakeWuliangsuhai;eutrophication;submergedplant;harvestingproject0012003