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Register a new userتقويم حساسية غراس بعض الأنواع الحراجية لإجهادي الملوحة والجفاف
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جامعة الفرات رسالة ماجستير
Publication date
2012
fields
Agricultural Engineering
and research's language is
العربية
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تم تنفيذ البحث عام 2011-2012 في مركز أبحاث جامعة الفات بالمريعية وذلك بهدف دراسة استجابة غراس بعض الأنواع الحراجية المستخدمة في التشجير لكل من اجهادي الملوحة والجفاف
No English abstract
References used
مشنطط هيثم . 1997- بيئة المحاصيل الحقلية - منشورات جامعة حلب
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This research aims at studying the effect of irrigation with different levels of NaCl on
the growth and development of Syrian pears (Pyrus syriaca). The results showed that:
1. Salt stress reduced chlorophyll content (a,b and a+b) in salt treatment
s compared to
the control , which contained 67.48 mg/g (a), 111.62 mg/g (b) and 204.76 mg/g (a+b),
while 1750 ppm of NaCl treatment contained 49.34 mg/g (a), 49.86 mg/g (b) and 158.77
mg/g (a+b) respectively. Treatment with 500 ppm of NaCl increased significantly
chlorophyll content compared to other salt treatments.
2. Leaves content of proline increased with increasing NaCl levels. It reached 870.8
ng/g when irrigation water contained 1250 ppm of NaCl, while it decreased in other salt
treatments. Leaves dry matter increased with the increase salt levels (24.50% for the
control, and 44.86% for 1750 ppm of NaCl).
The present investigation was carried out at the Agricultural Scientific
Research Center in Swieda to study the effect of deficit irrigation on the growth
of four apple seedlings rootstocks genotypes and to estimate their ability to
drought tolera
nce particularly in light of the lack of water sources and no rain.
Two irrigation levels: 100% (control) and 75% of water requirements were
applied. The shoot length, leaves number, leaves area, the distribution of the
roots in soil, the depth of irrigation water in the soil and the consumption of
water in each level were measured. Results showed that irrigation with 75% of
field capacity on studied genotypes caused reduction of shoots length, decline of
leaves number and area and the depth of root comparing with the control.
There were significant differences between studied genotypes in terms of vigor
where the genotypes C and S2 were superior than A and B.
The aim of this study is to evaluate the role of Bauhinia variegate, Bouganivillea
glabra, Ligustrum vulgare and Ficus brnjamina as bioaccumulators for Nickel. The
concentration of Nickel in the studied plant leaves, bark, wood and soils in Al-Fors
an
Garden (Lattakia City) was determined. The results showed that the Nickel concentration
in the Ficus brnjamina leaves and bark was significantly high (11.04 and 12.37 ppm)
respectively compared to other studied plants, whereas the nickel concentration was
approximately the same in the other studied parts, and approximately the same as its
natural concentration in plants. Our results also showed that the nickel concentration in the
studied soil did not exceed the international norms of children gardens (about 57ppm), but
it was very low regarding the park soils. The relationship between the nickel concentration
in Ficus brnjamina wood and Bouganivillea glabra bark was the most significant.
In this study, we review the possibility of production both ethanol and methanol from
OMW(OMW: Olive Mill Wastewater), fermented using pathogenic bacteria and isolated
marine bacteria. The results showed that when using Salmonella sp. bacteria, the
highest
values of methanol (5658.308 μg /l) appear at 7.5% concentration of the OMW, and the
higher concentration of ethanol (49.132 μg/l) at a concentration of 17.5% fermentation of
OMW. While Pseudomonas sp. produced the highest concentration of methanol (603.76μ
g/l) and ethanol (688.71μg /l) at 17.5% for OMW.
The results of this research showedthe ability of the bacteria isolated from sea water
in producing the above mentioned alcohols; for example the X3 bacteria displayed a direct
correlation between high concentrations of OMW (15 , 35 , 50)% and the high
concentrations of produced methanol (UL, 130.406μg/l, 1353.244μg/l ), apposite to
ethanol which was under the detection limits (under limited: UL).
This study was carried out in a protected area at Rangeland and Dry
Environment Research Station, belongs to ACSAD and Aleppo university in
the Muslumieh, Aleppo, during 2004, by cultivating 11 plant species belong to
three different families, Fab
aceae (3 species), Poaceae (7 species) and Rosaceae
(one species), using 4 moisture Levels (5, 10, 15 and 20 mm), and 6 seeding
depths (0, 1, 2, 3, 5 and 7 cm). Results showed that the seeds of all the
investigated species failed to germinate at the moisture level of 5 mm, while
Onobrychis sativa (36.2%), Agropyron elongatum (53.9%), Agropyron cristatum
(36.1%), Phalaris tuberose (41.1%), Dactylis glomerata (12.2%) and
Sanguisorba minor (1.12%) germinated under 10 mm humidity. The seeds of all
investigated species germinated at the higher moisture levels (15 and 20 mm),
but the germination ratio varied between the species. The seeds of all studied
species were capable of germinating when placed at the soil surface and seeding
depth of 3 cm. The seeds of Agropyron elongatum (73.3%), Agropyron cristatum
(13.3%), Phalaris tuberosa (36.7%) were capable of germinating at depth of 5
cm. The seeds of all studied species failed to germinate at a the planting depth
of 7 cm.
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