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Changes of Growth Characteristics of Kentucky bluegrass under Water-nitrogen Interaction

水氮交互作用下草地早熟禾生长特性的变化



全 文 :!23" !6#
 Vol.23  No.6
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ACTA AGRESTIA SINICA
   2015$  11%
  Nov.  2015
犱狅犻:10.11733/j.issn.10070435.2015.06.014
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:Q944.3    [\]^_:A     [`aZ:10070435(2015)06122607
犆犺犪狀犵犲狊狅犳犌狉狅狑狋犺犆犺犪狉犪犮狋犲狉犻狊狋犻犮狊狅犳犓犲狀狋狌犮犽狔犫犾狌犲犵狉犪狊狊狌狀犱犲狉
犠犪狋犲狉狀犻狋狉狅犵犲狀犐狀狋犲狉犪犮狋犻狅狀
SUNJialin1,ZHANGWeicheng1,ZHENGHaixia1,CHENYajun1,
QINLigang2,ZHANGLu1,LIU Wei1
(1.HorticultureColege,NortheastAgriculturalUniversity,Harbin,HeilongjiangProvince150030,China;
2.AnimalScienceColegeAgricultureUniversity,Harbin,HeilongjiangProvince150030,China)
犃犫狊狋狉犪犮狋:Waterandnitrogenarethekeyfactorsinthegrowthofturfgrassandturfquality.Indailypro
ductionandconstructionprocessing,lawnoftenlimitedbythistwofactors.Therefore,thestudyofhow
toregulatetheratiobetweenwaterandnitrogen,andunderstandthemostappropriateandeconomicalwa
terandnitrogenconditionsinturfestablishmentprocessisofgreatsignificance.Threenitrogensupply
levelsandthreewaterconditionswereusedinthisexperiment,toevaluatethegrowthcharacteristicsand
turfqualityofKentuckybluegrass(犘狅犪狆狉犪狋犲狀狊犻狊).Theresultsshowed:lighterwaterstresswithhigh
concentrationofnitrogen,promotedthegrowthoftheundergroundbiomass,increasedleaflength,leaf
width,internodelength,tilers.Leafgreencolorindexiscloselyrelatedtorootlengthandroot/shootra
tio.Moderatewaterandlighterwaterstressenhancedthebiomassofundergroundandabovegroundwith
theincreasednitrogensupply,lowernitrogenconcentrationincreasedthegrowthofKentuckybluegrass
underseriouswaterstresscondition.Therefore,wecoulddrawaconclusionthatthenitrogenshouldbe
appliedaccordingtolocalconditions,includingdifferentwaterconditions;andtheuseoflessamountofni
trogencanhaveahigherqualityofturfunderseveredrought.
犓犲狔狑狅狉犱狊:Water;Nitrogen;Kentuckybluegrass;Growthcharacteristics
CDEF
:20150216;GHEF:20150715
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Table2 Thegrowthcharacteristicsof犘狅犪狆狉犪狋犲狀狊犻狊underdifferentwaterandnitrogeninteractiontreatments
¾@
Treatments
³&
Leaflength/cm
³ 
Leafwidth/mm
rù&Ð
Internodelength/mm
xZ×
Tiler/perplant-1
³´Ä×
Leafgreencolor
MW×HC 38.8±0.31C 2.9±0.141C 1.33±0.060B 9.0±0.816B 7.48±2.608A
MW×MC 39.0±1.93B 3.1±0.081B 1.37±0.065B 8.7±0.957B 7.08±3.044A
MW×LC 34.8±0.42E 1.9±0.238E 1.01±0.077C 5.0±0.816D 6.20±2.479A
LS×HC 42.6±0.60A 3.2±0.081B 1.76±0.080A 11.3±0.816A 8.26±0.057A
LS×MC 42.2±0.89A 3.5±0.095A 1.66±0.112A 10.6±0.957A 8.7±0.100A
LS×LC 37.5±0.73CD 2.7±0.057C 1.26±0.077B 7.6±0.577C 8.33±0.251A
SS×HC 35.2±1.11E 2.4±0.057D 1.26±0.084B 4.6±0.957D 7.53±0.986A
SS×MC 36.8±0.95D 2.3±0.170D 1.30±0.072B 6.6±0.577C 6.63±0.152A
SS×LC 33.2±0.46F 1.7±0.095F 0.73±0.070D 3.0±0.816E 6.00±0.200A
¾@
Treatment
×&
Rootlength/cm
?—Gº
Abovegroundbiomass/g
?ÍGº
Belowgroundbiomass/g
×to
Root/shoot
MW×HC 48.9±0.953B 2.53±0.204A 2.08±0.129A 0.82±0.009BC
MW×MC 47.4±1.123B 1.63±0.074C 1.32±0.065C 0.81±0.045BC
MW×LC 43.2±1.550C 2.08±0.394B 1.60±0.285BC 0.76±0.055C
LS×HC 42.8±1.485C 2.32±0.100AB 1.74±0.078B 0.75±0.026CD
LS×MC 42.7±1.556C 1.75±0.042BC 1.18±0.038CD 0.69±0.028D
LS×LC 39.3±1.224D 1.53±0.491C 1.03±0.166D 0.66±0.071D
SS×HC 49.9±1.393A 1.89±0.362BC 1.70±0.326BC 0.89±0.012AB
SS×MC 50.8±1.039A 1.56±0.207C 1.45±0.208C 0.93±0.060A
SS×LC 48.7±1.123AB 1.92±0.253BC 1.64±0.234BC 0.86±0.029B
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Note:Differentcapitallettersmeansignificantdifferenceatthe0.05level
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Table3 TwowayANOVAoneachindexof犘狅犪犘狉犪狋犲狀狊犻狊underdifferentwaterandnitrogeninteractiontreatments
Ä:
Index
Œx¾@
Watertreatments
¦w¾@
Nitrogentreatments
Ô¯’¢
Interaction
犱犳 犳 犘 犱犳 犳 犘 犱犳 犳 犘
³&
Leaflength/cm
2 118.94 <0.0001 2 68.36 <0.0001 4 3.95 0.0179
³ 
Leafwidth/mm
2 203.43 <0.0002 2 146.93 <0.0001 4 7.48 0.0003
rù&Ð
Internodellength/mm
2 105.68 <0.0003 2 126.71 <0.0001 4 3.26 0.0264
xZ×
Tiler/perplant-1
2 111.62 <0.0004 2 64.89 <0.0001 4 2.75 0.0485
×&
Rootlength/cm
2 122.97 <0.0005 2 22.18 <0.0001 4 2.14 0.1035
³´Ä×
Leafgreencolor
2 429.80 <0.0001 2 70.31 <0.0001 4 6.71 0.0028
  Ô:犘<0.05È6aê!",犘<0.01È6aêé!"
Note:significantdifferenceatthe0.05level,verysignificantdifferenceatthe0.01level
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Table4Thecorrelationanalysisbetweeneachindexof犘狅犪犘狉犪狋犲狀狊犻狊underwaterandnitrogeninteractiontreatments
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Index
³&
Leaflength
³ 
Leafwidth
rù&Ð
Internodelength
xZ×
Tiler
×&
Rootlength
?—Gº
Aboveground
biomass
?ÍGº
Underground
biomass
×to
Root/shoot
³&
Leaflength
1 0.946 0.947 0.985 -0.407 0.169 -0.141 -0.505
³ 
Leafwidth
1 0.913 0.939 -0.341 0.053 -0.217 -0.490
rù&Ð
Internodelength
1 0.921 -0.311 0.107 -0.123 -0.369
xZ×
Tiler
1 -0.417 0.196 -0.119 -0.52
×&
Rootlength
1 0.086 0.535 0.959
?—Gº
Abovegroundbiomass
1 0.873 0.026
?ÍGº
Undergroundbiomass
1 0.502
×to
Root/shoot

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(犘<0.05)
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Table5 TwowayANOVVAonbiomassof犘狉狅犘狉犪狋犲狀狊犻狊underwaterandnitrogeninteractiontreatments
Ä:
Index
Œx¾@
Watertreatments
¦w¾@
Nitrogentreatments
Ô¯’¢
Interaction
犱犳 犳 犘 犱犳 犳 犘 犱犳 犳 犘
×to
Root/shoot
2 60.38 <0.0008 2 6.08 0.0066 4 1.00 0.4251
?—Gº
Abovegroundbiomass/g
2 3.52 <0.0006 2 14.73 <0.0001 4 3.30 0.025
?ÍGº
Undergroundbiomass/g
2 12.86 <0.0007 2 25.64 <0.0001 4 5.24 0.003
  Ô:犘<0.05È6aê!",犘<0.01È6aêé!"
Note:significantdifferenceatthe0.05level,verysignificantdifferenceatthe0.01level
v6 “X{*+7‘lm¤¥½¾¿|}
ó‚d=ó]@ÃÉHÄe~
Table6Linearregressionofwaterandnitrogen
interactiveprocessingonleafgreencolorwitheach
indexof犘狉狅犘狉犪狋犲狀狊犻狊
Ä:
Index
OˆU
Linearregression
³&
Leaflength/cm
犳=0.9256狓+31.0526(犚2=0.4208犘=0.0587)
³ 
Leafwidth/mm
犳=0.1842狓+1.2927(犚2=0.4697犘=0.0416)
rù&Ð
Internode
length/mm
犳=0.0808狓+0.7098(犚2=0.3498犘=0.0934)
xZ×
Tiler/per
plant-1
犳=0.8916狓+0.8887(犚2=0.5108犘=0.0305)
×&
Root
length/cm
犳=1.7430狓+33.280(犚2=0.9528犘<0.0001)
?—Gº
Aboveground
biomass/g
犳=0.1395狓+0.8971(犚2=0.8310犘=0.0006)
?ÍGº
Underground
biomass/g
犳=-0.0852狓-0.9046(犚2=0.3625犘=0.0862)
×to
Root/shoot
犳=0.0387狓+0.5151(犚2=0.9399犘<0.0001)
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