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:2004-08-17;:2004-12-13:(2001BA606A-02):(1965-),,,,2001,,12.,,(,810001):,:;010cm,,;,,;,,,:;;;:S812:A:100026311(2005)0220009207BiomassDistributionPatternofDegradedGrasslandinAlpineMeadow.LIUWei,ZHOUHua2kun,ZHOULi(NorthwestPlateauInstituteofBiology,ChineseAcad2emyofSciences,Xining810001,China):GrasslandofChina,No.2,2005,pp.915.Abstract:TheexperimentwasconductedinKobresiahumilismeadowindifferentdegradedlevel.Theresultsindicatedthatundergroundandabovegroundbiomassde2creasedwiththeaggravationofgrasslanddegradedlevel,andundergroundbiomassmainlydistributesatascaleof010centimeters,andtheirsizesaresignificantlar2gerthantheothers,andplantrootstrendedtogatherinsoilsurfacelayer.Biomassofsedgesandgrassesdeclinedandbiomassofforbsincreasedwiththeaggravationofgrassland2degradedlevel.Totalabovegroundbiomasswasfarlessthantotalunder2groundbiomassinlightandmediumdegradedgrassland,andtherewasfewdiffer2encesbetweenheavyandextremedegradedgrassland,especially,itisalmostthesameinextremedegradedgrassland.Keywords:Alpinemeadow;Degradedgrassland;Biomass;Distributionpattern927220053Vol.27No.2GrasslandofChinaMar.2005©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[14][5][612][1315],,,,11.137293745N1011210133E,3900m,,,,,,(Kobresiahumilis),,:(Kobresiapygmaea)(Scirpusdistigmaticus)(Ely2musnutans)(Poaspp.)1.2200382025()0.25m26,,;,[16](10cm),6,,25cm25cm40cm,,,1.3,,;;22.1,,,,35[1719],,,11Table1Plantcommunityfeatureindifferentdegradedgrassland(g/m2)(%)(%)215.642.798478.91196.593.177237.48155.511.41509.24141.383.65354.08012005272©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1),(F=4.54,P0.05,df=3,20)(2),,,,,2Table2Percentageofplantgroupindifferentdegradedgrassland72.3617.4610.1842.9727.4029.6325.306.3768.330.331.9197.762.32.3.1040cm,(2),,,112621648134040cm3,,:010cm1020cm2030cm3040cm(F=801080,P0101,df=3,20;F=211232,P0101,df=3,20;F=631836,P0101,df=3,20;F=71729,P0101,df=3,20),1020cm2030cm3040cm,,(F010=141304,P0101,df=3,20;F1020=261408,P0101,df=3,20;F2030=141095,P0101,df=3,20;F3040=181357,P0101,df=3,20):010cm,,,;1020cm2030cm,,;3040cm,11©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3),,,,,90119%92141%93139%,,86188%,,,,,010cm,3Fig.3Belowgroundbiomassdistributionindifferentdegradedgrassland212005272©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[20],,[21,22],,[23]2.3.24,4Fig.4Belowgroundbiomassofplantgroupsindifferentdegradedgrassland,,:(F=19.17,P0.01,df=3,20;F=18.47,P0.01,df=3,20);,(F=120.76,P0.01,df=2,15;F=9.05,P0.01,df=2,15);,;,(F=14105,P0101,df=2,15)(2),,,(3),,,;,,;,,,,3Table3Belowgroundbiomasspercentagesofplantgroupsindifferentdegradedgrassland82.8714.182.9578.1313.418.4657.386.4836.142.719.4587.8431©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:121891711461731119,,,,16[23],,2.4.2,(4),;,;,,,,4Table4Biomassdistributionsofdifferentplantgroupsindifferentdegradedgrassland:14.76(575.7039.01)10.46(98.479.41)3.73(20.495.49)31.16(423.5113.59)8.38(72.698.67)4.90(45.879.37)14.84(73.774.97)6.67(8.331.25)3.46(46.4613.43)9.43(0.660.07)5.87(2.290.39)1.07(21.2719.82)3311,;040cm,010cm,90119%92141%93139%86188%,312,,,,3.3,,3.4:,::;:;:412005272©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1].[J].,2001,10(2):22227.[2],,,,.[J].,2001,9(2):79282.[3],,.[J].,1997,(3):7211.[4],.CNP[J].,1998,6(2):90298.[5].-[J].,2001,10(4),13220.[6].[J].,2002,11(1):24230.[7].[A].(1)[C].:,1985112223.[8].[A].(1)[C].:,1985164273.[9].[A].[C].:,1988.61271.[10],,.[J].,1991,11(4):3332340.[11]SingyJS,YadavaPS.Seasonalvariationincompo2sition,plantbiomassandnetprimaryproductivityofattropicalgrasslandatKuruksherva[J].IndiaEc2ologicalMonograph,1974,44:3512376.[12],,1[J].,2002,11(2):59265.[13]SteenE.Rootandrhizomedynamicsinaperennialgrasscropduringananimalgrowthcycle[J].Jour2nalofAgriculturalResearch,1985,15:25230.[14],.[A].(2)[C].:,198811322138.[15],,.[J].,1992,9(2):24228.[16]W1(,).[M].:,1985.[17]1[J].(),2000,31(5):5082512.[18].[J].,1999,30(6):129.[19].[J].,2001,15(2):49252.[20],,,.[J].,1999,(4):31236.[21],,.[A].[C].:,1988.73281.[22].[J].,1998,19(1):36242.[23],,.[J].,1998,22(3):2222230.[24],.[J].,1999,7(3):1982203.51©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.