الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
The study was carrid out in two consecutive seasons of 1991/1992<
1992/1993 on one Rose variety namely Mercedes at the Experimental
Station of the Faculty of Agricultural at Moshtohor, Zagazig University.
This investigation included two parts, the first part studied the
effects of GAJ, kinetin, Pac1obautrazol and ethrel. The second part aimed
to study the effect of plant density under open land. The most important
out look of the present investigation were:
The first part.
1- Tne number of leaves per flower stem was increased significnatly by
spraying Mercedes rose with kietin 200 ppm followed by GAJ 300
ppm or kinetin 100 ppm and at cart by pacrobutrazol 100 ppm and
ethrel 100 ppm.
2- Different GA3’ kinetin, paclobutrazol and ethre1 treatments resulted in
an significant increase of fresh weight of flower stem with leaves. The
heaviest weight was obtained when treating plants with 200 or 100 ppm
kinetin followed by 300 ppm GA3 and at last by GA3. paclobutrazol at
200 ppm and ethrel 100 ppm.
3- There was a positive linear correlation between the GA3. kinetin and
paclobutrazo] conceutration and the dry weight of flower stem with
leaves while a negative correlation was occurred with ethrel with
winter and spring flush.
4- Highest number of flower per plant was increased significantly by
application’ Mercedes’ rose with paetobatrazal at 200. 100 ppm
followed by 200 ppm of kinetin and GA) at 300 ppm with winter flush.
While kinetin at 200 ppm, Paclobutrazol 200ppm. GA3 200pp1l1and
ethrell00 ppm, respectively with spring flush.
5- The addition of GA) and kinetin at different concentrations generally
resulted in an increase in flower stem especially: with the highest
concentration. But the addition of ethrel gave least length as the control
plants especially with the high concentration. While the treatments with
paclabut razol especially at low concentration produced the taller thau
any other treatmcnts and the control plants in the two !lushs.
(,_ flowcr stem thickness exceeded as paclobutrazal concentration
increased also this increase was pronounced with the highest level of
kinetin application, on the other band tile lowest level of ethre]
treatment had obvious effect.
7- Spraying Mercedes rose with GA3, kinetin, paclobUlrazol and ethrel
resulted in an increase in the diameter ofthe !lowers in most cases and
8- Hinebavoitehstflufrsehsehs.weights of flowers in the winter flush were obtained from
trealing Mercedes rose with 200 ppm paclobutrazal, 200 ppm kinetin
and 300 ppm GA3 ’ respectively. Whiel the application of 200 ppm
ethrel gave the least results in this respect. As for spring !lush kinetin
200ppm produced the maximum fresh weight followed by
paclobutl1\zol 200 ppm, kinetin 100 ppm, GA3 300 p.p.m and last by
eOthnretlhe\OotOhper.p.smid.e the highest cOllcentration of ethre’ (200 ppm) reduced
the fresh weight of flower in the winter and spring flush.
9- The mean dry weight of flowers was increased by GA3, kinetin,
paclobutrazal and ethral treatments. Heaviest dry weight were
produced from spraying plants with 200 ppm/paclobutrazol, 200 ppm
kinetin followed by paclobutrazal at 100 ppm. GA3 300 ppm kinetiu
’00 ppm and ethrel 100 ppm, respectively at winter flush. While the
treatments. by kinetin 200 ppm, paclobutl1\zal 200 pp’” and GA3 at 300
ppm, respectively, gave the best results with spring flush.
10- The nitrogen content was increased in the two seasons espcially: with
the high concentl1\tion of both kinetin and paclobutrazal. While the low
concentration of ethrel lead \0 an increase in the total nitrogen content
in opposite of the high concentrtion.
11_ Spraying Mercedes rose with GA3. kinetin, paclobutraZOl and etnrel
increased the carbohydrate content Higher value was produced with
200 ppm paclobu\fllZol followed by etbrallOO ppm, kinetin 100 and
200 ppm in the first and second seasons.
12- The addition of kinetin at 100 or 200 ppm gave the the maximum value
of chlrophyll ”A” followed by paclobutrazol 200 ppm and at the last by
13-paMc1oosbt utorfaztohleata1p0p0liepdpmk.inetin and paclobatrazol treatments increased
chlorophyll B but ethrel addition decreased it in this respect.
The results of the present research show that in order to get good
quality of both flowering and vegetative characters with Mercedes mose. it
is advisable to practice the following .
A- Us•ing Foliar application with GA3 at 300 ppmwas more effective on
flowering and growth characters than 200 ppm.
B- Treating with foliar application ofkinetiu at 200 ppm that resulted in
good quality concerning flowering and vegetative growth.
C- Using paclobutrazal with the high.concentration of 200 ppm gave the
best results in improving the flowering qualities such as number and
diameter of flowers, fresh and dry weights of flower stem.
D- Using foliar application with ethrel at low concentratiou (100 ppm) was
more effective on growth and flowering than high concentration (200
ppm).
The second part:
I_ There was a negative linear correlation between increased plant density
per m
1
and the number of leaves per flower stem. Plant density at 1
0
or
16 plantslm2 produced the max:imumnumber of leaves per flower stem
compared than to 20 or 24 plants/m2
.
2_ The population of 10 or 16 plantslm1caused in a significant increase in
the fresh and dry weight of flower stem with leaves in both flushs
3- Plant density at 20 or 16 plantslm2 produced the maximum number of
flowers per plant compmed with 10 or 24 plantslm
4- The highest numher of flowrs per m2 was obtained with 20 plantslm
2
followed by 24 16 plants/m2, respectively, While 10 plants/ln
2
produced the least one in this conceOl.
5- 20 plantslm2 gave the longest flower stem while 16 or 24 plants/m
2
produced the next value in this concern, On the other hand 10 plants/m
2
prodnced the shortest flower stem In winter flush, While 24 plantslnl
2
gave the longest flower stem followed by 20, 16 plants/m
2
, respectively
6- aTthseprdinifgfefrluensht . plant density produced the same result on flower stem
7_ dAiasm’ feoterr.mean diameter of a flower, population 10 or 16 plants/m
2
gave
the maximum diameter of a flower while 20 or 24 plantslm
2
gave the
next value in this concem.
8- Heviest fresh and .dry weight of flowers were obtained from 1
0
or 16
plants/m2, While 24 plants/m2 produced the least fresh and dry weights
of flowers in winter flush, While 20 or 24 plantslm2 gave the maximum
dry weight of flowrs in the spring flush.
9- The highest nitrogen content was produced with 16 plantslm
2
, while 1
0
or 20 plants/m2 gave the next value in this concern, The minimum
nitrogen content gave with 24 plantsJm2
.
10- 16 plantslm2 gave the highest value of total carbohydrate in both
seasons, whiel24 plants/m2 produced the least value in this concern in
11-boththe smeaasxoinms.um value of chlorophyll A and B produced by 10 orl6
planOtsnlmb2asiins bootfh tsheeasseonsre. sults, the following recommendation could be
presented sixteen plantslm2 is a siutable planting distance for better
production of cut flowers from mansedes Rose plants.