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Rhizosphere Effects and Ecological Stoichiometry of Different Landscape Plants in Xi’an

西安市不同园林植物根际效应及生态化学计量特征研究



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,2016,36(4):0766-0776
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犚犺犻狕狅狊狆犺犲狉犲犈犳犳犲犮狋狊犪狀犱犈犮狅犾狅犵犻犮犪犾犛狋狅犻犮犺犻狅犿犲狋狉狔
狅犳犇犻犳犳犲狉犲狀狋犔犪狀犱狊犮犪狆犲犘犾犪狀狋狊犻狀犡犻’犪狀
LUOMeng,LIUChanghai
(ColegeofLifeSciences,Yan’anUniversity,Yan’an,Shaanxi716000,China)
犃犫狊狋狉犪犮狋:Twelvedominatelandscapeplants,犌犪犾犻狌犿狅犱狅狉犪狋狌犿,犆犪狀狀犪犻狀犱犻犮犪,犐狉犻狊狋犲犮狋狅狉狌犿,犘犪犲狅狀犻犪犾犪犮狋犻
犳犾狅狉犪,犔犻犵狌狊狋狉狌犿犾狌犮犻犱狌犿,犗狊犿犪狀狋犺狌狊犳狉犪犵狉犪狀狊,犆犻狀狀犪犿狅犿狌犿犮犪犿狆犺狅狉犪,犕犪犵狀狅犾犻犪犵狉犪狀犱犻犳犾狅狉犪,犘犺狅狋犻狀
犻犪狊犲狉狉狌犾犪狋犪,犖犲狉犻狌犿狅犾犲犪狀犱犲狉,犈狌狅狀狔犿狌狊犼犪狆狅狀犻犮狌狊,犔狅狀犻犮犲狉犪犼犪狆狅狀犻犮犪and犞犻犫狌狉狀狌犿狅犱狅狉犪狋犻狊狊犻犿狌犿inXi’
an,NorthernChina.However,thedistributionofsoilnutrientsintherhizosphereandnonrhizosphereareas
andecologicalstoichiometryoflandscapeplantsinthisregionhavebeenlargelyunknown,Thispaperdis
cussestherhizosphereeffectsandecologicalstoichiometryoftwelvelandscapeplantsinXi’an.Theresults
wereasfolows:(1)thecontentofsoilC,N,andPinrhizospherewerehigherthanthatofnonrhizosphere,
whilepHwaslowerthanthatofnonrhizosphere.ThesoilC,N,andPofdifferentlandscapeplantsshowed
significantenrichmentandpHshowedsignificantloss.(2)ThecontentofsoilC,N,andPpresentedtheob
vious“surfaceaggregation”,whichgradualydeclinedwiththeincreasingsoildepth.(3)Thecontentofsoil
C,N,andPinthesameorgansshowedarbors>shrubs>herbs,andinthesamelandscapeplantsshowed
leaf>stem>root,whichsuggestedthatthelandscapeplantshaditsownabsorptionmigration,accumula
tioncharacteristics.(4)Astosoilstoichiometric,soilC/Nshowedarbors>shrubs>herbs,andhadnosig
nificantlydifference(犘>0.05),soilC/PandN/Pshowedherbs>arbors>shrubs,thelowerC/PandN/P
preliminaryshowedthelandscapeplantsmoreeasilyrestrictedbyNandPinthesoilunderthenaturalcon
ditions;Astoplantstoichiometric,leafC/Nshowedshrubs>herbs>arbors,C/P,N/Pshowedherbs>
shrubs>arbors,andhadnosignificantlydifference(犘>0.05).(5)Correlationanalysisshowedthattheleaf
C,N,C/N,N/PhadsignificantcorrelationwithsoilC,N,C/N,N/P(犘<0.05),whichilustratedthede
mandfornutritionelementsofthelandscapeplantsbasicalyconsistentwithsoilnutrients,whilethecon
tentofsoilPhadnoeffectwithplantleavesP.
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i1 789:;Table1 Thegrowthcharacteristicsofdifferentlandscapeplants
Šˆ
Item
µL
Height/m

Crown/cm
áŒ
Diameter/cm
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Growthyear
ÇÈ
Arbor
]eop犗狊犿犪狀狋犺狌狊犳狉犪犵狉犪狀狊 2.7~3.6 3.2~4.3 12.3~13.4 14±3
qr犆犻狀狀犪犿狅犿狌犿犮犪犿狆犺狅狉犪 4.8~6.2 3.5~4.9 14.2~15.6 16±1
stu犕犪犵狀狅犾犻犪犵狉犪狀犱犻犳犾狅狉犪 5.2~6.4 3.1~4.8 11.5~12.3 8±2
ÞÈ
Shrubs
vw犘犺狅狋犻狀犻犪狊犲狉狉狌犾犪狋犪 1.3~1.6 0.5~0.8 2.3~3.4 7±2
xyz犖犲狉犻狌犿狅犾犲犪狀犱犲狉 1.9~2.7 1.3~1.9 6.3~7.8 12±1
]e{|犈狌狅狀狔犿狌狊犼犪狆狅狀犻犮狌狊 0.8~1.4 0.9~1.4 4.2~5.4 7±2
}~犞犻犫狌狉狀狌犿狅犱狅狉犪狋犻狊狊犻犿狌犿 0.7~2.3 0.7~1.6 3.5~3.8 13±1

Herbs
def犌犪犾犻狌犿狅犱狅狉犪狋狌犿 0.7~1.2 0.6~1.1 0.6~0.8 6±1
ghi犆犪狀狀犪犻狀犱犻犮犪 0.4~0.8 0.4~0.7 0.8~1.4 7±2
jk犐狉犻狊狋犲犮狋狅狉狌犿 0.3~0.6 0.3~0.5 0.3~0.6 5±1
lm犘犪犲狅狀犻犪犾犪犮狋犻犳犾狅狉犪 0.8~1.1 0.2~0.4 0.2~0.4 6±1
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1.犔犻犵狌狊狋狉狌犿犾狌犮犻犱狌犿;2.犗狊犿犪狀狋犺狌狊犳狉犪犵狉犪狀狊;3.犆犻狀狀犪犿狅犿狌犿犮犪犿狆犺狅狉犪;4.犕犪犵狀狅犾犻犪犵狉犪狀犱犻犳犾狅狉犪;
5.犘犺狅狋犻狀犻犪狊犲狉狉狌犾犪狋犪;6.犖犲狉犻狌犿狅犾犲犪狀犱犲狉;7.犈狌狅狀狔犿狌狊犼犪狆狅狀犻犮狌狊;8.犞犻犫狌狉狀狌犿狅犱狅狉犪狋犻狊狊犻犿狌犿;9.犌犪犾犻狌犿狅犱狅狉犪狋狌犿;
10.犆犪狀狀犪犻狀犱犻犮犪;11.犐狉犻狊狋犲犮狋狅狉狌犿;12.犘犪犲狅狀犻犪犾犪犮狋犻犳犾狅狉犪.Thesameasbelow.andindicatedsignificantdifferentbetween
rhizosphereandnonrhizospheresoilatlevelof0.05and0.01,respectively
Fig.1 Contentsofsoilnutrientsinrhizosphereandnonrhizospheresoilofdifferentlandscapeplants
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Table2 Contentsofnutrientsandenrichmentratioinrhizosphereand
nonrhizospheresoilofdifferentlandscapeplants
Šˆ
Item
‚
Rhizosphere(R)
·‚
Nonrhizosphere(S) R
/S ¼½ßEnrichmentratio/%
C݇ Totalcarbon/(g·kg-1) 15.5±2.1a 13.3±2.8b 1.17↑ 14.19    
N݇ Totalnitrogen/(g·kg-1) 1.35±0.21a 1.08±0.16b 1.25↑ 20.00    
P݇ Totalphosphorus/(g·kg-1) 1.25±0.11a 1.14±0.17a 1.10↑ 8.80    
pH 6.29±0.16b 6.47±0.44a 0.97↓ -2.87    
  ¤:³c#$‚·‚Z[¥¦ÏŽ³°œ‘’²º»(犘>0.05)。
Note:Thesamelettersofrhizosphereandnonrhizospheresoilindicatenosignificantdifferenceatthe0.05level.
”2 ²³GH#$Z[C、N、P\pHë´ì
Fig.2 AveragecontentsofsoilC,N,PandpHofdifferentlandscapeplants
077 ! " # $ % &                   36
g·kg-1;Z[N݇¥†jL`1.18~1.52g·
kg-1,Z[ P݇¥†jL`0.85~1.23g·
kg-1,Z[pH쥆jL`0.58~0.69;Z[C、
NFP݇¬ß°¸`fß(def、ghi、jk
Flm
)>ÇÈ(]eÞÈ

vw

xyz

]e{|F}~
),
ÅZ[
pH¬ß°¸`ÇÈ(]eu
)>ÞÈ(vw、xyz、]e{|F}~)>


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ghi

jkFlm
)。
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²³GH#$Z[–ŠÝ‡
(C、NFP)wZJƒL
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~10cmZJ)µ,ƒJ(40~50cm)Z[–ŠÝ‡


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12.69~15.23(´ ì`14.20),Z[C/Pë´ìÒ
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1.28),ÞÈZ[N/P¥†jL`1.14~13.39(´
ì`1.28),fßZ[N/P¥†jL`1.29~1.43
(´
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21.96(´ ì`19.55),ÞÈeøC/N¥†jL`
19.53~24.36(´ ì`22.05),fßeøC/N¥†
”3 Z[C、N、PÏЊш‰
Fig.3 TheverticaldistributionofsoilC,N,P
ofdifferentlandscapeplants
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277 ! " # $ % &                   36
jL`19.42~22.88(´ ì`21.78),eøC/Në
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N/Pë´ìÒÓ°¸`fß>ÞÈ>ÇÈ,dSí
´º»
(犘<0.05)。
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犉=34.21);eøN/PZ[N/PØÁº»€£¥
Žž
(狔=2.368e-1.574狓,犘<0.01,犚2=0.899,
犉=42.06)。
i4 789:;<`ao;Table4 Thestoichiometryofsoilandplantleavesofdifferentlandscapeplants
Šˆ
Item
Z[Soil
C/N C/P N/P
eø Leaves
C/N C/P N/P
ÇÈ
Arbor
]eop犗狊犿犪狀狋犺狌狊犳狉犪犵狉犪狀狊 10.94±0.56 14.95±1.38 1.37±0.26 16.27±1.02 346.45±12.56 21.29±1.36
qr犆犻狀狀犪犿狅犿狌犿犮犪犿狆犺狅狉犪 11.67±0.89 15.00±1.96 1.29±0.14 19.65±1.13 303.53±16.89 15.45±2.03
stu犕犪犵狀狅犾犻犪犵狉犪狀犱犻犳犾狅狉犪 9.85±1.15 11.54±1.34 1.17±0.36 21.96±0.95 359.69±17.23 16.38±2.56
´ì Mean 10.93±0.97a 13.99±164a 1.28±0.28b 19.55±1.06b 343.93±15.89c 17.79±1.87c
ÞÈ
Shrub
vw犘犺狅狋犻狀犻犪狊犲狉狉狌犾犪狋犪 11.03±2.13 14.33±0.89 1.30±0.15 23.65±1.59 403.62±19.18 17.07±1.89
xyz犖犲狉犻狌犿狅犾犲犪狀犱犲狉 10.59±0.98 14.71±1.23 1.39±0.19 19.53±1.87 356.13±23.41 18.24±1.67
]e{|犈狌狅狀狔犿狌狊犼犪狆狅狀犻犮狌狊 9.12±1.02 10.86±1.47 1.19±0.24 24.36±2.05 412.69±15.85 16.94±1.88
}~犞犻犫狌狉狀狌犿狅犱狅狉犪狋犻狊狊犻犿狌犿 9.66±0.78 10.97±1.54 1.14±0.31 20.67±2.14 409.82±26.47 19.82±2.04
´ì Mean 10.10±1.14a 12.72±1.31b 1.25±0.25b 22.05±1.92a 395.57±21.47b 18.02±2.03b

Herb
def犌犪犾犻狌犿狅犱狅狉犪狋狌犿 10.06±1.23 12.96±1.05 1.29±0.23 23.88±1.95 402.67±28.34 16.86±1.59
ghi犆犪狀狀犪犻狀犱犻犮犪 9.76±0.56 14.00±0.96 1.43±0.31 19.42±1.56 405.29±16.89 20.87±0.98
jk犐狉犻狊狋犲犮狋狅狉狌犿 10.30±0.97 14.58±0.85 1.42±0.18 22.38±1.84 388.23±17.36 17.35±0.87
lm犘犪犲狅狀犻犪犾犪犮狋犻犳犾狅狉犪 11.12±1.32 15.23±2.03 1.37±0.19 21.43±1.36 414.58±21.74 19.35±1.55
´ì Mean 10.31±1.13a 14.20±1.19a 1.38±0.21a 21.78±1.51a 402.69±18.34a 18.61±1.41a
i5 `ao;Table5 Pearson’scorrelationcoefficientsamongsoilandplantstoichiometryofdifferentlandscapeplants
eøLeaves(狔) Z[Soil(狓) øYESFittingequation 犚2 犘 犉
C C 狔=23.856狓-15.237 0.956 <0.01 36.58
N N 狔=0.569狓+13.694 0.859 <0.01 45.13
P P - 0.314 >0.05 -
C/N C/N 狔=1.237狓-1.056 0.769 <0.01 34.21
C/P C/P - 0.158 >0.05 -
N/P N/P 狔=2.368e-1.574狓 0.899 <0.01 42.06
  ¤:.Žà0.01Ä뛺»;.Žà0.05Ä뛺»;ó³。
Note:.Correlationissignificantatthe0.01level(2tailed);.Correlationissignificantatthe0.05level(2tailed).
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