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Regulatory Effects of Stip grandis on Above-ground Biomass of Plant Community in Grazing Ecosystem

大针茅对放牧生态系统植物群落地上生物量的调控作用



全 文 :书!24" !1#
 Vol.24  No.1
! " # $
ACTA AGRESTIA SINICA
   2016$  1%
  Jan.  2016
犱狅犻:10.11733/j.issn.10070435.2016.01.001
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:S812    ABCDE:A     AFG@:10070435(2016)01000111
犚犲犵狌犾犪狋狅狉狔犈犳犳犲犮狋狊狅犳犛狋犻狆犵狉犪狀犱犻狊狅狀犃犫狅狏犲犵狉狅狌狀犱犅犻狅犿犪狊狊狅犳
犘犾犪狀狋犆狅犿犿狌狀犻狋狔犻狀犌狉犪狕犻狀犵犈犮狅狊狔狊狋犲犿
HUJing1,2,HOUXiangyang1,SARula1,LIXiliang1,2,WANGZhen1,DINGYong1
(1.InstituteofGrasslandResearchofChineseAcademyofAgriculturalScience,Hohhot,InnerMongolia010010,China;
2.GraduateSchoolofChineseAcademyofAgriculturalScience,Beijing100081,China)
犃犫狊狋狉犪犮狋:AgrazingdensityexperimentwasconductedinthetypicalsteppeofInnerMongolia.Basedon
theinfluenceofgrazingon5dominantspeciesinindividual,populationandcommunitylevel,respectively,
theexperimentexploredtheregulatoryeffectsof犛狋犻狆犵狉犪狀犱犻狊onabovegroundbiomassingrazingecosys
tem.Resultsshowedthat:Inindividuallevel,heightsofbunchgrass(犛狋犻狆犵狉犪狀犱犻狊and犆犾犲犻狊狋狅犵犲狀犲狊
狊狇狌犪狉狉狅狊犪)werenotaffectedbylightandmoderategrazing,whileheightsofrhizomegrass(犔犲狔犿狌狊
犮犺犻狀犲狀狊犻狊,犃犵狉狅狆狔狉狅狀犿犻犮犺狀狅犻and犆犪狉犲狓犽狅狉狊犺犻狀狊犽狔犻)weredecreasedwithgrazingtreatment.Therewas
apositivecorrelationbetweenplantheightandindividualbiomassingrazingecosystem.Inpopulationlev
el,犛狋犻狆犵狉犪狀犱犻狊wasnotsensitivetograzing,butthepopulationbiomassof犔犲狔犿狌狊犮犺犻狀犲狀狊犻狊,犃犵狉狅狆狔狉狅狀
犿犻犮犺狀狅犻,犆犾犲犻狊狋狅犵犲狀犲狊狊狇狌犪狉狉狅狊犪and犆犪狉犲狓犽狅狉狊犺犻狀狊犽狔犻showedpositivecorrelationtotheirrichness.In
communitylevel,communitybiomasswasregulatedbybiomassof犛狋犻狆犵狉犪狀犱犻狊,whichhasthehighgraz
ingtolerance.Inlightandmoderategrazingtreatment,犛狋犻狆犵狉犪狀犱犻狊wasthebeneficiarywithintheredis
tributedresource.Compensatorygrowthof犛狋犻狆犵狉犪狀犱犻狊bufferedthedisturbanceofgrazing,andregula
tedthecommunityproductionandfunctionalstability.
犓犲狔狑狅狉犱狊:犛狋犻狆犵狉犪狀犱犻狊;Grazingecosystem;Typicalsteppe;Abovegroundbiomass;Individualpopula
tioncommunity
HIJK
:20141105;LMJK:20150302
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Authorforcorrespondence,Email:dingyong228@126.com
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Table1 Speciesandabovegroundbiomasscharacteristicsinungrazingplot
KG
Species
_S9K`
Abovegroundbiomass/g·m-2
_S9K`ظ
Alocation/%
_S9K`ظ¹Ö
Cumulativealocation/%
<º]ë
犆犞/%
YZ[犛狋犻狆犵狉犪狀犱犻狊 124.87 51.77 51.77 27.18
v-犔犲狔犿狌狊犮犺犻狀犲狀狊犻狊 34.70 14.39 66.16 52.54
z{|-犃犵狉狅狆狔狉狅狀犿犻犮犺狀狅犻 36.30 15.05 81.21 60.41
klm-犆犾犲犻狊狋狅犵犲狀犲狊狊狇狌犪狉狉狅狊犪 10.00 4.15 85.36 85.21
wxy-犃犵狉狅狆狔狉狅狀犮狉犻狊狋犪狋狌犿 9.26 3.84 89.20 71.94
‘XRemainingspecies 26.07 10.80 100.00 40.40
  ü:g&‘X»OP9K`ظué3%TKGã6
Note:Remainingspeciesconstitute<3%oftotalcommunitybiomassdrymatter
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hm-2·a-1)6SR7.5(2.50sheep·hm-2·a-1),
¿M>?uŽÓÖn2hm2。>?2%n¿$T6
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SR4.5ÑniA>?Óù,SR6.0Ñn&A>?Ó
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-Ô&Ý

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=8.51+10.3犌 (犚2=0.98),â&犎犲nÔ&Ý,犌
n>?Ý
[17]。
ÔdLevins9\ŸÞAºâ²ßGO9\Ÿ
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:犅犔=1/r((犘犻犼)2,â&犅犔 nGO9\ŸÞA;
犘犻犼nGO犻L!犼“”SHIAØàú“”HIA
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;狉n>?–A?9。
9\Ÿ²ß&HIAT²ßÒân

HIA=

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Table2 ANOVAanalysisfortheeffectofgrazingrate(G)andspecies(S)onindividualbiomassandheight
ê©5mFixedfactor 犱犳
rs Height MN9K`Individualbiomass
犉 犘 犉 犘
>? Grazing(G) 5 78.060 <0.001 8.552 <0.001
KGSpecies(S) 4 93.109 <0.001 70.199 <0.001
>?Ý×KG G×S 20 6.207 <0.001 3.032 <0.001
  EF-.JKMNrs69K`D>?TVŠ
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m-rsLSR0.0,SR3.06SR4.5ÓùœîJg
PO…†Øº

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(犘<0.05),ISR3.06SR4.5ÓùœTJrs
Aغ

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KrsTUV6h…

nv-

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(犘<0.
05),ò=•T>?é(SR7.5)ÿv-6z{|-

ë1)。
èë2Lã,YZ[MN_S9K`D>?–
ATVŠ6h…

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(SR7.5),L‘
X>?Óù&©ögPO…†Øº

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S9K`L&•A>?š›œ©…†‚ƒ

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69.7%,85.35%,49.20%683.97%,z{|-=
¾‚ƒ72.61%,95.40%,88.40%696.46%,kl
m- = ¾ ‚ ƒ 86.90%,95.80%,74.44% 6
90.50%;wxy-GO9K`LÜ>?Óù&T
DÒغ

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=1 %&$c~+,z{2|u
Fig.1 Theeffectofgrazingonplantheight

!1# Æ Ç?:YZ[D>?9\]^JKOP_S9K`Tabcd
=2 %&$c~+,st,12|u
Fig.2 Theeffectofgrazingonindividualbiomass
=3 +,st,1Wz{9>r
Fig.3 Thecorrelationanalysisof
individualbiomassandheight
  õYZ[e,‘ý4GHIJKTGO9K`
AÞJ…†T‡ˆ‰‰]

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‘&OP9K`LSR3.0,SR0.0Óùœ…†s
éSR7.5(SR0.0vsSR7.5:犘=0.01;SR3.0vs
SR7.5:犘<0.01;ë7A)。Àì>?–ATí
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Table3 ANOVAanalysisoftheeffectofgrazingrate(G)andspecies(S)onpopulationbiomassandrichness
ê©5m
Fixedfactor
犱犳
GO9K`Populationbiomass GOA Richness
犉 犘 犉 犘
>?Grazing(G) 5 8.136 <0.001 2.748 0.017
KGSpecies(S) 4 130.964 <0.001 37.569 <0.001
>?Ý×KGG×S 20 6.870 <0.001 2.468 0.001
=4 %&$c~+,e-a€2|u
Fig.4 Theeffectofgrazingonrichnessofplants

!1# Æ Ç?:YZ[D>?9\]^JKOP_S9K`Tabcd
=5 %&$c~+,e-,12|u
Fig.5 Theeffectofgrazingonpopulationbiomass

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Fig.6 Thecorrelationanalysisbetweenpopulationbiomassandrichness
=7 %&$+,-.,1w,e‚ƒ2|u
Fig.7 Theeffectofgrazingoncommunitybiomassandalocationofplant

!1# Æ Ç?:YZ[D>?9\]^JKOP_S9K`Tabcd
  JKOP%9Ÿ`n¬êÔ&`JKOP_
SP+9K`ã6

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AœJKOP%9Ÿ`_SP+9K`T<ðó
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OPT)*

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=8 %&$+,-.„…,1w
†‡12|u
Fig.8 Theeffectofgrazingoncommunitybiomass
andnetprimaryproduction
3 ˆ‰
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犛狋犻狆犪犵狉犪狀犱犻狊
v-
犔犲狔犿狌狊犮犺犻狀犲狀狊犻狊
YZ[
犛狋犻狆犪犵狉犪狀犱犻狊
|-
犃犵狉狅狆狔狉狅狀犮狉犻狊狋犪狋狌犿
klm-
犆犾犲犻狊狋狅犵犲狀犲狊狊狇狌犪狉狉狅狊犪
wxy-
犃犵狉狅狆狔狉狅狀犮狉犻狊狋犪狋狌犿
SR0.0 0.972 0.976 0.972 0.970 0.929 0.946
SR3.0 0.963 0.909 0.963 0.872 0.928 0.953
SR4.5 0.973 0.897 0.973 0.904 0.888 0.981
SR6.0 0.906 0.689 0.906 0.885 0.877 0.956
SR7.5 0.926 0.801 0.926 0.726 0.648 0.649
4 p‰
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OP9¤¥¦§¨©ª•«Tabcd

”•AB
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/

ÙC]^TJÁgh`
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ment,2014,28(1):18
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ÝT/0Ⅱ.j?-_SP+`6%899¤¥nøùµF
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———
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