江西千烟洲人工针叶林下狗脊蕨群落生物量

1,2131,21,21,2(1,100101)(2,100049)(Woodwardiajaponica)(Netprimaryproductivity,NPP)(Specificleafarea,SLA)(Leafareaindex,LAI),W1=0.021H1.545(R2=0.790)W1=2.518(D2H)0.616(R2=0.894;H,D)367.8gm-2(52932gm-2),1631gm-2(6722763gm-2),4.7%(1.55%13.2%)20.7%(7.6%32.1%)NPP266.6gm-288.67gm-2a-1,73.7%;212.6gm-2SLA(Leavesdaymuttercon2tent,LDMC)144.0cm2g-131.99%,;S=21.9226-0.152L2+0.0009L3(9.0L()23.5;1.4W()5.9)LAI1.8APRELIMINARYSTUDYONBIOMASSOFWOODWARDIAJAPONICACOMMUNI2TYUNDERACONIFEROUSPLANTATIONINSUBTROPICALCHINAMAZe2Qing1,2,LIUQi2Jing13,XUWen2Jia1,2,LIXuan2Ran1,2,andLIUYing2Chun1,21InstituteofGeographicScienceandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China,and2GraduateUniversityofChineseAcademyofSciences,Beijing100049,ChinaAbstractAimsThepurposeofthestudywastodeterminethebiomass(includingfineroots),NPP,spe2cificleafarea(SLA),leafareaindex(LAI),andsoilnutrientsofWoodwardiajaponicacommunityunderar2tificialconiferousforestinJiangxiProvinceinsubtropicalChina.MethodsPlantsinquadratswereharvestedanddryweightwasmeasured.Leafareawasmeasuredbyscan2ning,andSLAwasrepresentedbytheratioofdrymattertoleafarea.LAIofthepopulationwasestimatedbySLAandleafbiomass.ImportantfindingsTherelationshipsbetweenabovegroundbiomass(W1)andgeometricparametersofW.japonicawereestablished(W1=0.021H1.545(R2=0.790)andW1=2.518(D2H)0.616(R2=0.894),H:height;D:diameter).Thebiomassofherbageandshrubunderconiferousplantationwas367.8gm-2(52-932gm-2),4.7%ofcanopylayer.Theaccumulatedlitterunderforestwas1631gm-2(672-2763gm-2).Theabove2andunder2groundbiomassofW.japonicacommunitywere266.6gm-2and212.6gm-2,respectively.Intotal,thebiomassofW.japonicapopulationapproximatelyaccountedfor73.7%ofthewholeherbaceouslayer.Therewasasignificantnegative2correlationbetweenSLAandleavesdrymattercontent(LDMC).Aleafarea(S)modelwasestablishedintheformofS=21.9226-0.152L2+0.0009L3(9.0L:maxlengthofleaf23.5;1.4W:maxwidthofleaf5.9).LAIofW.japonicapopula2tionwasestimatedas1.8m2m-2.Soilwatercontentaffectedbiomassofthecommunity.Apositivecorrela2tionbetweenbiomassandsoilnitrogenconcentrationorsoilorganicmatter(SOC)wasidentified.KeywordsWoodwardiajaponica,biomass,biomassmodel,leafareamodel,SLA,LAI,X:2006211201:2007209213:(973)(2002CB412506),,3AuthorforcorrespondenceE2mail:[e-mail]2mailofthefirstauthor:[e-mail]2008,32(1)8894XJournalofPlantEcology(ChineseVersion),,(,2002),(,1995),,;,(,1982;,1997;,2000),(,2002;,2003),(Leafareaindex,LAI)LAI(,2004)LAI,LAI,(,2004)(,2007),LAI,,(Woodwardiajaponica),,,,,,,,,LAI,,11.1,1150413E,264448N200hm2100m,2050m,17.9,1489mm,1406h,4349MJm-2,323d,,,(,1989)(1985),(Pinuselliottii)(Cunning2hamialanceolata)(Pinusmassoniana)(Cinnamomumcamphora)(Schimasuperba)(Liquidambarformosana),(Citrusreticulata);(Quercusfabri)(Loropetalumchinense)(Lespedezafor2mosa)20,80%,15cm(Arundinellasetosa)(Helicteresangustifolia),,20,(Dryopterischampioni)(Adiantumflabellulatum)(,2005),1.21.2.12005200689,18(12,6)7(1,0.75;20054,20063)1Table1SiteconditionsofWoodwardiajaponicacommunityForesttypePinuselliottiiforest12345P.massonianaforest67AspectSUNSHASHASUNSHASHASHASlope15131335315Canopydensity0.900.850.900.850.920.800.95SUN:SunnyslopeSHA:Shadyslope1:89(Lophatherumgracile)1m1m,,80,;,1/440cm,4,0.28mm,,(Netprimaryproductivity,NPP),3NPP,35(,2001),NPP(4)1.2.2,,,,(W)(L)51,(50dpi),,(L)(W)SPSS,4,(R2),1)S=a+bX+cX2(XLW)2)S=aXb(XLW)3)S=a+bX(XLW)4)S=a+bX1+cX2(X1L,X2W)(L:;W:)1.2.3,1/440cm,10cm,500g,4(10cm)2,22.12.1.115.8gind.-1,5.2gind.-1(2),67cm,131cm24,5,3,11;6575cm,26.5g(3),(B),D2HHDCH1,R20.662Table2GeneralvariablesforWoodwardiajaponicaindividualBiologicitemsMinMaxMeanStandarderrorNumberAbovegroundbiomass(g)0.614.55.23.3370Diameter(mm)1.677.384.391.2170Height(cm)1613167.724.670Crownwidthsize(cm)154929.47.6370Petiolelength(cm)13593311.53703Table3CorrelationmatrixforWoodwardiajaponicaDHCH1D2HBD1.000.770.670.680.900.83H1.000.770.890.890.86C1.000.660.720.82H11.000.810.73D2H1.000.92B1.00D:Diameter(mm)H:Height(cm)C:Crownwidthsize(cm)H1:Petiolelength(cm)B:Above2groundbiomass(g)4,,(R2)0.773,,90324Table4BiomassmodelofWoodwardiajaponicaModelR2FpW1=-17.465+2.824D+0.201H+0.407C-0.139H10.865103.820.001W1=-18.351+2.809D+0.14H+0.42C0.859134.200.001W1=-13.751+3.33D+0.221H0.818150.240.001W1=-14.387+0.225H+0.51C0.811144.220.001W1=-13.836+6.75C0.692152.860.001W1=-7.646+0.347D0.748201.750.001W1=-15.55+1.068H0.683146.560.001W1=4.112+0.732(D2H)0.844367.230.001W1=2.518(D2H)0.6760.894574.490.001W1=3.156+0.869(D2H)+-0.003(D2H)20.847185.550.001W1=0.715D2.0110.816301.230.001W1=1.3911.659D0.794262.300.001W1=1.391e0.506D0.794262.300.001W1=e(0.33+0.506D)0.794262.300.001W1=0.021H1.5450.790256.390.001W1=e(4.233+(-6.71)/D)0.773231.200.001D:Diameter(mm)H:Height(cm)C:Crownwidthsize(cm)H1:Petiolelength(cm)W1:Freshweight(Watercontent:66.9%)1TherangesofvariablesformodelapplicationswereshowninTable1(D2H),(,1997)(16cmH131cm),W1=0.021H1.545(R2=0.790);W1=2.518(D2H)0.616(R2=0.894),(16cmH131cm;0.17cmD0.74cm),,(,1997)2.22.2.19,144.0cm2g-1(128.8185.1cm2g-1)31.99%(29.97%33.44%),68.01%