This research studied the impact of planting location and cooking time
periods of (5, 10, 15, 20 and 40 minutes) on the antioxidant effect, and on the
total Phenols and Flavonoids contents using five different samples of Syrian
onions. The results
showed that the total Phenols, total Flavonoids and
antioxidant activity contents were between (279-583)mg/100g dry wt, (80-180)mg/100g dry wt, and (60-75%) respectively. In addition, boiling for
different periods resulted in increased total Phenols from (383 to789)mg/100g
dry wt and in total Flavonoids from (124 to 205)mg/100g dry wt as well as an
increase of (77% to 88%) of antioxidant activity as measured using the DPPH
method.
Yhis study was investigated at Agriculture Faculty of Damascus university
during the agricultural season of 2012/2013 in order to determine the effect of
foliar spray with seaweed extract (5 and 10 g/l) and GA3 (50 and 100 ppm) on
the growth and p
roduction of local red onion (Baladi) at different levels of
irrigation (100, 75, and 50% of field capacity). Onion bulblets were planted in
pots and plants were treated when they had 3-4 leaves and every two weeks
until full vegetative growth.
The experiment was carried out to assess the germinability and seedling
growth rate of some treated vegetable seeds (i.e. onion, carrot, and tomato) with
aerated - aqueous solutions.
Seeds were treated for 24 hours with 0.1% of both succinic acid
and
nutrient solution, and the seeds to medium ratio was 1:5.
The soaking solution was continuously aerated by an air pump. At the end
of treatment, the seeds were dried up at room temperature to eliminate the
excess superficial moisture.
A pots experiment was carried out using two soil types (clay loam and sand
soil) to study the interaction between VA-mycorrhizal (My) and some soil fungi
under the effect of rock phosphat on growth of onion plant.
The interaction between mycorrhiz
al (My) and other soil fungi increased
the fresh weight of root in comparison with mycorrhizal (My) alone, however
the differences were not significant except for (Saccharomyces+Mycorrhiza)
(Sac+My) similar results were obtained in sandy loam soil.
The percentage of root colonization on the growth of onion plant was not
effected by the interaction between mycorrhiza (My) and other osil fungi
(Actinomucor, Aspergillus, Penicillium, Saccharomyces) (Act, Asp, P, Sac). This
value, however was high in the second harvest in treatment mycorrhiza (My)
and (My+Sac) (My+Act) The VAM- fungus alone and their interaction with
other soil fungi increased the plant growth.
This study has been carried out using the onion and pepper seeds to
determine the effects of the aqueous medium temperature, during treatment
with oxygen, on the germination percentage seed vigor and for determining the
period needed for the treat
ment with the oxygen as well.
The treatment period has taken ١٢-٣٦ hours according to the kind of crop
and the medium temperature, which varied between ١٠-٣٠ °C.
Results of the study indicated that the treatment of seeds with oxygen, in an
aqueous medium, improved the germination percentage and the seed vigor. The
period needed for the treatment of the seeds with oxygen differs according to
the kind of crop and the temperature of the medium and varies between ١٨-٢٤
hours with respect to the onion seeds, and between ٢٤-٣٦ hours regarding the
pepper seeds. The period needed for treatment with oxygen decreases with the
rise of temperature.
