39
7he SODnts Zere DrrDnge in coPSOeteOy rDndoPized bOocNs
design reSOicDted IoXr tiPes Zith eDch reSOicDte consisted
oI SODnts (three bags)
(Dch bDg (0.5 m2) contDined nine SODnts PDNing Ior D
totDO density oI SODnts Ser sTXDre Peter $OO the SODnts
Zere cXOtiYDted IoOOoZing the ¶bending· techniTXe in Zhich
ZeDNer Dnd XnPDrNetDbOe stePs Zere bent horizontDOOy in
order to SroPote bDsDO shoot IorPDtion Dnd to increDse
SODnt cDnoSy Dnd Oight interceStion
Irrigation Control
:Dter PDcro Dnd Picro nXtrients Zere sXSSOied to SODnts
throXgh D driS IertigDtion systeP (1 dripper per plant,
providing 2 Liters per hour) Zith irrigDtion Dnd IertiOizDtion
being DdPinistered by Dn on site coPSXter
7he S+ Dnd the eOectricDO condXctiYity oI the nXtrient
soOXtion Zere PDintDined Dt Dnd decisiePens Ser
meter (dS/m) resSectiYeOy
7hree irrigDtion regiPes high [HIR] PediXP [MIR] Dnd
OoZ >/,5 Zere tested eYery regiPe ZDs chDrDcterized
by the sDPe dXrDtion oI irrigDtions tZo Dnd three PinXtes
eDch Ior the Zinter Dnd sXPPer Seriods
,rrigDtion ZDs DdPinistered dDiOy Dccording to D Sreset
OeYeO oI DccXPXODted rDdiDtion e[SosXres oI Dnd
(kJ/m2) dXring Zinter resSectiYeOy Dnd Dnd
N- P dXring sXPPer 7he reDson Ior the YDriDtion oI
rDdiDtion OeYeOs ZDs to DchieYe D SictXre oI diIIerent totDO
ZDter sXSSOies Ior DOO treDtPents in eYery seDson
7he DccXPXODted rDdiDtion ZDs PeDsXred by D soODr
rDdiDtion sensor Zith DOO irrigDtion eYents Ds ZeOO Ds
DccXPXODtiYe rDdiDtion reDdings Zere coOOected by D
dDtD Oogger
Measurements and Data Analysis
)OoZer stePs Zere hDrYested by cXtting
to the second node IroP their origin
3rodXctiYe (number of flower stems/
plant, number of leaves/stem, stem fresh
and dry weight, dry matter partitioning,
water use efficiency) Dnd bioPetricDO
steP Oength Dnd thicNness bXd Oength
Dnd Zidth SDrDPeters Zere PeDsXred
dXring the triDO
'ry Zeight oI the bioPDss ZDs
deterPined DIter they sSent hoXrs
in Dn oYen (at 105°C) Zhen hDrYested
stePs reDched D constDnt YDOXe
:Dter Xse eIficiency (WUE) ZDs
cDOcXODted Ds the rDtio betZeen dry
bioPDss SrodXced Dnd SODnts totDO
ZDter sXSSOy
$YerDge dDiOy DccXPXODted soODr
rDdiDtion rDnged IroP D PiniPXP oI
N- P
,n 'ecePber oI the triDO yeDr reDching
D PD[iPXP oI N- P in the SreYioXs
6eStePber
5egDrding cXt ÁoZer SrodXction no
significDnt diIIerences Zere obserYed
DPong treDtPents (average 14.0 stems/
plant) desSite oI the irrigDtion regiPes
Xsed (See Table One)
6teP Oength Dnd thicNness Zere not
DIIected by the irrigDtion regiPes Zith Dn
DYerDge cPs in Oength Dnd PP
low irrigation
regimes
appear to
be the most
efficient
alternative for
a low-input
greenhouse
management
in rose
production
in the south-
Mediterranean
area