3.2.2.1 Warm
glasshouse
early
andlate during
the prapapt1ce Tho rly Gta( 11th - 23rd
May)
COIUiisted of 9 ntahta•tarttng
ut cotylDdoD o:xpnnsioo andfinishing prior to r 1D1 tiat1Cift COII'Wiatod of the next 1 4
nights.
By
d the lnte
stage (24th
May - 7th June)y all the kept in the glasshouse, wile n.t ni t tbe planta l"eCeiving a wara t tmont
stayed
1ntho
glnsahouoo,
tbo e recoiv1l'l a cold tre r to acold room kept :lt
4°C.
While tbo pln.nts m tie co ld the plants wre covered with black polythene with the dark riod nvernging 1 5 hoursFifty plants were allocated at r-andom to ouch of the four treatl'.nalta
and on 3 occasions during tho app lication of the treatments 5 plant saq>lea
were taken from each tl'eatmon t and their fresh and dry weights recorded .
3 . 2. 2 . 2 Natural alassboUBe
No control of minimul:l glasshouae temperature was maintained 1n this
gl�sohouse in tbo hope that the •an d::tily teq'lernture
would be such that
both single ;uut da.lble infloresconcoa would be initi:�tod. .my ditferencoa1n yiold between these two types of plant COll ld not theroforo be due to tornpo� turo effects. The plents in t hi s houao were pl..<tced under blr1ek
polythene covers nt the sn.me t imP as too plro.nts 1n the wnrm
house.
On 8th June tllo pl!'llltG from this house wcro r\ iaO'Ved to the \mrm glasshouse and by 7th July it waa poe ible to detortdao r-Jbnt type of inflorescence ench plant from t natural house wns to hnve. 22 had single inflorescences alXl 38 double inflorescences and they wero reforredto
as the single and double tl'eatmenta .3 . 2 . 3 Post treatment stage
All trent nts eoaaed CID 8th J'uno and tl'OJil thon an all pl:mta received
tiB sane temperature regS. as
prevloual.y
out U.nod (3.2.1 ). The six trea tmenta nre preoonted in Table 3. a.Tablo 3 . 2 Treatments applied to study the effects o:! teq»rature duri.ng prop�gut ion on the yield of s inglo-truss toma.tooa .
Treatment Code Gl.nssbousc
w�re tct:Jper:;.ture oorly a.nd lnte ':r.U"m
warn tempernture oa.rly cold temperature late want
cold tcr.1p0r�ture early warm tCJnl)erature late
C/W
warmcold tonq�nture early and lnte
C/C
wnmsill(;le inf lorescence 1
natural
"
natural -
double inflorescence
At the budo visible stage ach treatment wns planted into 9 11 tre black polythene bags contll1n1Dg a
�:50
peat sand �t plus a completefort ilizer mi."< ( Appendi.x 22) , which required tertng 011117 . On 7th Jul.y , wl1en the
single
nnd doubleplanta
ecu ld be ident ified, 1 5 pl.<tnta wereaoloctod at rnndom fraa tho re ining plants of &�eh trentmont olld a l loontecl nt
rantbm
to n diffel"mt block. From this date till the end of theexperiloont ( 6th October) a rondom1zed block deoion of 15 blocka oach cc:utnini.ng 1 pl:u:lt per treatment as usod. The SJXl.Cing used provided an
2
area of 0.2 11 per
plant.
From the start of tho experiment unt i l 7th July each treatment was kept
011 a s mobilo bench and the so were shifted to a different poa 1 tioa 1n the gl.asabcuse each day to ll1intm1ze poa 1t ional effects .
by 6t� October . 'nle fresh we1ght and DWllber of fru1 t was reeorded nt
ooch hnrvoot. On the finnl harvest dnto the aboVe {:."1'04.md pnrts of the
p lont were rotl"..oved nnd divided into len.ves and stet:.1B nnd oven dried :tt
0
1 00 C and tho dry we ights recorded.
3.3
3.3.1 Introduct ion
The dn.tn w0re
analysed
1n a. nUJllb&r orwe.yn.
Tho :rosul to of the :fou rtreatments from the vnrm glnsshouse we ana�sod, whoro npplicnble, as a 2 x 2 f:<.etor iu l oxporiment. Where the reaulta of the G troatmm ts wore oxn!3ined togetber, thm ei thor an
analysis
of rinnce used orsie;n.Uicant rclnticmshipa the r1ous parrunotera re
sought.
Thet to t vas used to cnlculnt significant d1tferoncos where two means were COZIJpared and Tukey's w proco&lre wns u ed where
mre
thnn tuo means "WOre 1nvoolved.3 . 3 . 2
propagation an. yield, number nnd on t,oeight ot fruit .
The results of the nna� is of ri ce cnrriod out an the relovnnt d11tn are presentod 1n Table 3 . 3 (Appendices
23-25) .
58 .
Tabla 3,3
propagnt ion an yield, number men.n of :trult .
�rly Lnte c c p 0, 01 Yield
(g)
55S 787 640 735 51.4 Frui t Number 7 , 51 1 . 2
S,6
10. 2
0,72Yor-n. fruit -�-eight ( [; )
78 . 5 71 . 2 77 . B 7'2 . 9 4 , 36 5 . 80
•:• S
i
gnii'icrmt differences for coq>aring either onrly or lute rneens .1"he cold troatnent
early
or significru1tly incron.acd (P< 0. 01 )yield
nnd nUJilbor
o:f fl"U it nndsignificant�
reaood llD:::.n fruit \tVight .Cola treatment early ;>roducOd the greater roapcmso in oach cnse. Tber were no
stgn1ficnnt
interacticma.3.3.3 Troatment effects on fruit y ield.
'I11a results of the analysis O'l variance caiTiod out cm the relovant dntu are pre 1n rizod fOl'lll 1n
Table 3.4
( Appon.cix 26) .
Tablo
3,4 Trentr::m:t at'!ects on fru it yie ld , �H.cnificant d ifferences Treatment Yield (g) ·. ,j\7 ii/C C/'..' C/C 541 635 739 834 1 57G p 0. 05 p 0. 01 81 8 7 1 27 . 7Tho
t;/":
and 1 treatments bad n s ignificant ly (P< 0, 01 ) J.o;:·er yie ldthon the
C/W,
C/C und2
trentment a , whil thBW/C
trontoent had as ignificant� (P< o. 01 ) lowor yield than the C/C and 2 tr t:aonts.
Relat ionship between yield and frui
t
llUE!bCr pa:· plnnt.'!110ro wns a s ignificant ( P < o. 01 ) oorrelntial ( r = o. 07) between yield and fruit mwber per plant for the 6 tron nts
( Fig.
3.1 ).3 . 3 . 5 Reln t ianship botv:een mean weight nnd nunbor of fruit per plant . Thero w:-.s a significant (P<. 0.
05)
negative re�tiallDhip ( r = -o, 88) between menn ';.>eight and number of frui t pe r plant for the G tre"� tmel'ltS (Fig .3.2).
3 . 3 . 6 Shoot clry matter ca1tont
of
young •wt
100The monn shoot dr'J matter ccmtcmts
( fresh wt x
1>
c4 5 plantsat
3 hanost
dates tor each of the 4 treat tagrot'Jil
:1n tm warmg
schouse aroin temperature levela am 2 after the chl1lDC8. '11lo period prior to tho chnDp we.a tgnatec! the early stage and that
nftor the ehnr.ao
tbD lat stage.900
8 00
,... bD ._, '0700
M 4> ·n ;:....600
1 00
90 ,... bD ._, +> .c: bD -M�
+>80
-M ;:l S-1 'H � cd 4> :;;;70
X X r =0 . 9 7
XP < 0 . 01
Fig.3 . 1 .
X X Fig.3 . 2 .
7
8
9
Fru it number1 0
Relat ion between y i e l d and fru i t number .
r =
-0. 88
P <. 0 . 05
X
X7
8
9
1 0
Fruit number1 1
1 1
Re lat i on between mean wei ght and number o f fru i t .
1 2
Ts.ble 3.5 :3hoot dry mattor content of
yC>tlllg
pl:::ntsIhto
Coml!lents
wii/C
Trc:�tl!lal
t;;.��
c.. __...,._. __
23/5
E::-.rly st·· �-1
nieht
bofore chnnr;e 7. 9 7. 9 1 1 . 0 10. £)30/5 Lnte
stnge
6.5 8 . 8 G.G 8. 0l;/6 Lnto stf\go -1
nicht o£ treatment
loft 7. 0 1 0. 7 G. 5 10.9