This research aimsto study the effect of single and mixed infection of Potato Y Virus (PVY) and Cucumber mosaic virus(CMV) on the number of leaves, number of branches, plant height and stem circumference of tomato plants (cv.Elegro and Local). The ex
periment was carried out in 2012 in a greenhouse in Tartous. Results show that the interactions in both varieties to virus infections are different. The mixed infections cause slight and weak effects compared to single infections. This is probably due to the antagonistic relationship between Potato Y virus and Cucumber mosaic virus and their effects on mean number of leaves, mean number of branches, mean height of plants, and mean stem circumference. Tomato plants' stems were (Elegro 106.42, 16.75, 103.58 cm, 4.84cm.; Local 94.42,15, 87.17 cm, 4.59 cm, respectively). Consequently, the timing of mixed infection playsarole in appearance, development and effect on other viruses.
The research was performed in AL-Gab region, Hama Province during the agricultural
season 2012-2013. The investigation was carried out to assess five varieties of muskmelon
from central Asia "Gezel Zametsha, Ak Gorbek, Pakeraman, Kara Kaon, Ak Kash
", plus
control (Ananas Hollar)
The results showed that two varieties "Ak Kash and Kara Kaon " had better leaf area,
while the variety of "Ak Gorbek" had more number of feminine blossoms on the plant and
higher percentage of node blooms. "Kara Kaon" Which gave high productivity 6850 Kg/Dunm
in comparison with the control 4724 Kg/Dunm to "Ananas Hollar".
A strong Correlation link had been found out between the area of leaf surface and
productivity. The number of feminine blossoms and the percentage of the node productive
blooms. But a strong negative link was found between the number of picked fruit and average
weight of the fruit.
This study aimed to obtain seedlings balanced and superior in growth, by searching
the effect of seed size on the growth and development of seedlings of carob tree
( Ceratonia siliqua L.) developing in containers Minirhizotron in the growth room in
Research Center in Bouka-Lattakia. Seeds were divided into three categories (large-size
LS, control CS, small-sized SS) and studied several quantities indicators of growth and
development of the total shoot and root of the seedlings for a period of three months.
For a radical system, results indicated a high significant superiority in the large
seeds values for the main root of the overall growth rate such as length (cm) and the speed
of growth (cm/3days) and secondary roots (total number, total length/cm) height to control
and small seeds. And the significant superiority of the seeds of the control on the small
seeds.
It has also given large seeds higher values regarding all indicators related to the shoot
system such as average diameter and average height and average number of phalanges
stem and leaves, and ending with the dry weight of shoots.
Results for the study of periodic growth curves for the main root and main stem of
the three treatments indicated the presence of a great similarity in the overall appearance of
these curves, which refers that the appearance is not affected by this change in the amount
of seed size. On the other hand, the phenomenon was observed in contrast growth
Antagonism clearly between the totals shoot and root with any end to the growth of main
root accompanied by a junior at the end of the main stem growth and vice versa.
This research aims to study the effect of different treatments of potato plants with a
feeding organ on the growth and yield of potato crop and on the quality of tubers. The
Romano variety of potato was used, and the commercial organic feeder "plan
t energy
1000" was applied in four treatments. The treatments were: a control and three ways for
treating the plants with the organic feeder: by roots, foliage spray, and by both in one
treatment.
The completely randomized design was adopted in this experiment. The experiment
was implemented in the nursery farm of Tishreen University in the spring planting season
of 2012.
The results showed that treating potato plants with the organic feeder led in general
to an increase in the growth, which was reflected in the increase in the fresh weight, total
leaf area and its indication, as well as in the quality and number of tubers, total production
and marketing quality. These results were clearer in the case of the joint treatment: root
feeding and foliage spray together. This treatment showed significant superiority in
increasing production and improving its quality.
The study was conducted on six varieties of cucumber: Napleon, Ampres,
Sendian, Prence, Samara and Baladi. To study the responses of these varieties
to drought stress, on the seed germination and seedling growth under different
Polyethylen glycol
concentrations (0 control, 10 mM, 20 mM and 40 mM PEG).
The results of this research showed a some varieties to its tolerance to drought
stress. The varieties Ampres, Prence and samara showed more resistance to
drought stress. It s indicated with increasing seed germination and growth of
seedlings with the higher concentration of PEG in compared to another
varieties.
The effect of green manure and biofertilizer by using (Lupinus albus and
Lupinus albu s + Rhizobium) on some soil properties and potato growth and
production during two successive seasons of 2007/2008 and 2008/2009 was
studied. The results showed
that green manure provided the soil with 3.75
kg/m2 green organic matter including (398 g dry matter and 14 g nitrogen),
while lupinus albus + Rhizobium provided the soil with 4.55 kg/m2 green
organic matter including (581 g dry matter and 22.3 g nitrogen) and improved
soil chemical properties. The results showed as well that biofertilizer significant
improved potato growth parameters: plant and tuber dry matter, foliage
surface, foliage index, plant length, plant elements content (N,P,K,Ca and Mg),
tuber number and their content of nitrate and protein .The results showed as
well that biofertilizer significant improved marketing potato yield.
This study was carried out in the nursery gardens of Tishreen University in the
early spring period in 2014, to study the effect of different levels of dry organic manure in
the growth and productivity of potato plants (class Spunta), in randomized
complete
design, study included six treatments: control ( cow organic manure amount of 4 kg/m2)
and five treatment with five levels of dry organic manure (100-150-200-250-300 g/m2)
.The results showed an increase in stem height, number of stem, foliage area, production
and percent of standard tubers by adding dry organic manure at level of 250 g/m2 while
Treatment with 300g/m2 contributed an increase of folige area, height of plant and stem
number while causing reduced plant production,tuber average weight and production of
standard tubers.The result showed also no significant differences between the control and
the treatment of 250 g/m2dry organic manure in each of the folige area, production and
standard tubers
The study was carried out at Tishreen University nursery during the spring of 2015
in order to evaluate the effect of the bio-fertilizer EMI on the growth and production of
Sponta Potato Solanum tuberosum. Four treatments were used as follows: cont
rol, with
water irrigation, spraying and irrigation, spraying.
The results showed that the use of bio-fertilizer EMI improved the growth of plants,
so the surface foliage, foliage index and plant height were increased significantly
comparing with the control.
The results also showed that the spraying and irrigation treatment was the best with a
tuber average weight of 117.7 g/tube obverse (102.7, 115, 109 g/tuber), and a yield of
5864 kg/d obverse (4151, 5569, 5398 kg/d) for treatment (control, water irrigation,
spraying).
The investigation was conducted during 2013-2014 in Al-Moroj - Baniyas - Tartous.
The effect of grafting cucumber (Hybrid Amir F1 and Potenza F1) on (TZ 148 F1)
rootstock on growth and production was studied. The experiment contained 4 treatments
(ungrafted Amir F1 and Potenza F1, and grafted ones on Cucurbita hybrid).
The results showed that grafted cucumber (Amir F1) on (TZ 148 F1) was significantly
superior to other treatments in leaf area (15368.79 cm2.plant-1) and total production (21.58
kg .m-2). Grafting cucumber (Potenza F1) on (TZ148 F1) leaded to a significant decrease in
each of plant height (113.25 cm), number of secondary branches (7.5 branch . plant-1),
number of female flowers (94.13 flower . plant-1), number of fruits (38.13 fruit . plant-1)
and total production (14.61 kg .m-2). The earliness in grafted cucumber (Amir F1 and
Potenza F1) on (TZ 148 F1) (0.19 and 0.28 kg .m-2 respectively) was significantly
decreased compared to ungrafted plants (0.43 and 0.54 kg .m-2 respectively). Grafting on
(TZ 148 F1) didn't affected the fruit qualitative characteristics.
The research was carried out in the fields of Akar plain in Tartous
province during two seasons (2013, 2014) to study the effect the three
multiplication methods (Slips as control, Seedling, Cut-seed tuber) on
growth and yield of two locally sprea
d sweet potato varieties. The
experimental design was a randomized complete block with three
replications. Data were analyzed using the statistical program GenStat 12.
