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Vol.23 No.5
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犚犲狊狆狅狀狊犲狅犳犚狅狅狋犌狉狅狑狋犺狋狅犖狌狋狉犻犲狀狋犔犲狏犲犾犻狀犃犾犳犪犾犳犪犛犲犲犱犾犻狀犵犛狋犪犵犲
XUEZheng,ZHANGKun,TANGHaiyang,SHENYixin
(ColegeofAnimalScienceandTechnology,NanjingAgriculturalUniversity,Nanjing,JiansuProvince210095,China)
犃犫狊狋狉犪犮狋:Forclarifyingtheeffectsoffertilizerontherootgrowthofalfalfa(犕犲犱犻犮犪犵狅狊犪狋犻狏犪)seedlingin
southernChina,apottrialwascarriedouttostudyrootsystem growth with4cultivars (Icon,
WL525HQ,SupersonicandWL903)treatedbyfiveconcentrationsofnutrientsolution(0.1,0.2,0.3,
0.4and0.5timesHoaglandsolution).Theresultsindicatedthattheaveragerootlength,rootnumber,
rootvolumeandrootsurfaceareaofplanttreatedby0.1and0.2timesHoaglandsolutionweregreater
thanthosetreatedby0.4and0.5timesHoaglandsolution.Butaveragerootdiameter,rootdryweight,
plantheightandstemdryweightincreasedsignificantly(犘<0.05)withtheconcentrationofHoaglandso
lutionincreasing.Theeffectofnutrientsolutionconcentrationonrootshootratiowasnosignificantdiffer
enceamongtreatmentssuggestingthattheabilityoflateralrootgrowthinalfalfaseedlingstagewasstron
geratthelowerconcentrationofnutrientsolution,andthehighlevelofnutritionpromotedthegrowthof
abovegroundandrootdrymatteraccumulationsignificantly.
犓犲狔狑狅狉犱狊:Lateralroot;Drymatteraccumulation;Rootsystem;Nutritionlevel;Alfalfa
EFGH
:20140902;IJGH:20141217
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áânB¥¿öB Hoagland¹N[6](P1)。
Ò+ | ë Hoagland á â n + l ÿ k n 2.5
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Table1 ThenutrientformulaofHoagland
®F
Elements
<@9
(
z{×
)
Compounds(AR)
Ìë
Concentration
*ë®F
Major
elements
_KØsÙCa(NO3)2·4H2O 945mg·L-1
ØsÚ KNO3 506mg·L-1
Øs* NH4NO3 80mg·L-1
rsÛËÚ KH2PO4 136mg·L-1
ÛsÜ MgSO4·7H20 493mg·L-1
lÿkn òKÛsÐlFeSO4·7H20 5.56g·L-1
Na2FeEDTA +ÛÝ_+sÛÞEDTA·Na 7.46g·L-1
ë®F
Trace
elements
ß<Ú KI 0.83mg·L-1
à s H3BO3 6.2mg·L-1
Ûsá MnSO4·4H2O 22.3mg·L-1
ÛsâZnSO4·7H2O 8.6mg·L-1
ãsÞNa2MoO4·2H2O 0.25mg·L-1
ÛsäCuSO4·5H2O 0.025mg·L-1
å<æCoCl2·6H2O 0.025mg·L-1
1.2 fgMNYUV
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mentsInc.,Canada)ç¾z{,JÕL¼u、L
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(Duncan)Kp½;iDorgz{,DorK
L0.05。
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0.4=0.5[áân^XB¼%p、¼\Â
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4eGYBì=+©ÜCd^XáânÜ
¨Îìrñ
(
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80.2[áân^XDoWrs,Ò~3eGY
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Table2 EffectsofdifferentconcentrationsofHoaglandsolutionontherootmorphologyofalfalfaseedling
GY
Cultivars
áânܨ
Concentrationof
nutrientsolution
/mol·L-1
¼ÜC
Rootdryweight
/mg
L¼ÓØ
Averageroot
diameter/mm
L¼u
Averageroot
length/cm
¼%p
Rootnumber
¼\Â
Rootvolume
/cm3
¼P/Â
Rootsurface
area/cm2
¬3Icon
0.1 8.7c 0.57b 65.10a 68.7a 0.19a 11.59a
0.2 16.1b 0.62ab 59.41a 59.7a 0.17ab 11.31a
0.3 16.5b 0.64ab 44.03ab 55.4a 0.15abc 8.70ab
0.4 36.0a 0.72a 42.38ab 52.0a 0.14bc 8.58ab
0.5 35.5a 0.72a 30.80b 34.3b 0.12c 6.73b
WL525HQ
0.1 7.7c 0.61b 67.75a 69.0a 0.20a 14.54a
0.2 16.0b 0.63b 57.43ab 57.0ab 0.16ab 9.48b
0.3 20.9b 0.66b 46.81bc 54.9ab 0.15b 8.58b
0.4 39.6a 0.80a 36.60cd 34.3bc 0.14b 7.53bc
0.5 34.2a 0.81a 29.67d 44.3c 0.12b 6.07c
ж¶
Supersonic
0.1 7.3c 0.58c 68.72a 72.9a 0.19a 12.45a
0.2 18.5b 0.61bc 51.20b 69.2a 0.18a 10.47ab
0.3 21.3b 0.64abc 46.49b 50.9b 0.17ab 9.39bc
0.4 34.9a 0.66ab 39.43b 48.0b 0.14b 7.86c
0.5 34.8a 0.69a 40.14b 48.4b 0.13b 7.75c
WL903
0.1 8.9d 0.59b 75.12a 73.3a 0.22a 14.09a
0.2 18.5c 0.61b 55.44b 53.3b 0.15b 10.15b
0.3 27.0b 0.62b 39.49c 43.0bc 0.14b 8.96b
0.4 43.5a 0.73ab 25.14d 34.4c 0.14b 6.52c
0.5 44.4a 0.87a 21.28d 31.1c 0.14b 5.92c
ò:XÄp½ÌwéBCWXPó犘<0.05KLDor
Note:Differentsmallettersinthesamecolumnindicatesignificantdifferenceatthe0.05level
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Table3 Correlationcoefficientsamongroottraitsofalfalfaseedling
L¼u
Averagerootlength
¼%p
Rootnumber
¼\Â
Rootvolume
¼P/Â
Rootsurfacearea
L¼ÓØ
Averagerootdiameter
-0.435 -0.447 -0.243 -0.384
L¼u
Averagerootlength
1 0.584 0.583 0.818
¼%p
Rootnumber
1 0.368 0.507
¼\Â
Rootvolume
1 0.692
ò:@gÄÃr(犘<0.01)
Note:significantcorrelationatthe0.01level
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Fig.1 EffectsofdifferentconcentrationsofHoaglandsolutionontherootmorphologyofalfalfaseedling
ò
:0.1S,0.2S,0.3S,0.4S=0.5SzÆPó0.1,0.2,0.3,0.4=0.5[ Hoaglandáânܨ
Note:0.1S,0.2S,0.3S,0.4Sand0.5Sindicate0.1,0.2,0.3,0.4and0.5timesofHoaglandsolution,respectively
459
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Table4 EffectsofdifferentconcentrationsofHoaglandsolutionontheplantheight,
shootdryweightandrootshootratioofalfalfaseedling
GY
Cultivars
áânܨ
Concentrationof
nutrientsolution/mol·L-1
ì
Plantheight
/cm
+©ÜC
Shootdryweight
/mg
¼ÙÈ
Rootshoot
ratio
¬3Icon
0.1 5.47c 23.2e 0.38a
0.2 8.54b 50.7d 0.32ab
0.3 9.51b 67.3c 0.24b
0.4 11.81a 110.4b 0.33ab
0.5 13.19a 125.4a 0.29ab
WL525HQ
0.1 6.14c 22.2d 0.36ab
0.2 8.39bc 56.2cd 0.29b
0.3 9.31ab 66.6bc 0.32ab
0.4 10.32ab 103.8ab 0.39a
0.5 11.79a 118.3a 0.30ab
ж¶
Supersonic
0.1 6.73d 24.1d 0.31a
0.2 9.57c 67.5c 0.28a
0.3 11.14bc 78.2c 0.27a
0.4 11.96b 111.7b 0.31a
0.5 13.97a 139.3a 0.25a
WL903
0.1 6.78c 26.8c 0.33a
0.2 9.41b 70.9b 0.27a
0.3 11.54ab 72.1b 0.37a
0.4 12.31a 128.4a 0.34a
0.5 13.28a 137.6a 0.32a
ò:XÄp½ÌwéBCWXPó犘<0.05KLDor
Note:Differentsmallettersinthesamecolumnindicatesignificantdifferenceatthe0.05level
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