Get In Touch

Address Location on map

Lecturers

Home // Lecturers // Omar Altaher Omar Alhlak

Omar Altaher Omar Alhlak


Permanent Lecturer

Qualification: Doctorate

Academic rank: Assistant professor

Specialization: بيئة نباتية - البيئة

Department of Environmental Science - Faculty of Science - Zintan

Publications
Accounting for plastic waste with Zintan waste dump and its impact on the environment, man and plant حصر النفايات البلاستيكية بمكب نفايات الزنتان وتأثيره على البيئة والانسان والنبات
مقال في مجلة علمية

Abstract

Plastics have an important and vital role to play in today’s life. While there is no industrial product without one type of plastic, the increasing volume and accumulation of Plastics waste and the damage it does to human beings and the environment has led to growing concerns in the world. The increasing and accumulated volume of plastic waste has resulted in damage that has filled the world’s continents, seas, and oceans by containing unresolved polymeric and chemical materials. Then he sorted some waste and found a plastics ratio of about 30.4% of the total household garbage. The results also showed the number of individual waste products at 0.023 kg/person. / Today. The amount of waste. Produced per year is 21,718 tons. The volume of plastics is estimated at 6.602 tons per year. Vegetation close to the landfill site was also affected, leading to its removal

عمر الطاهر عمر الهلاك، (07-2023)، HNSJ, 2023, 4(7); https://doi.org/10.53796/hnsj4714: مجلة العلوم الإنسانية والطبيعية، 7

Inventory and study of some annual plant species in the City of Zintan حصر و دراسة لبعض الأنواع النباتية الحولية داخل مدينة الزنتان
مقال في مجلة علمية

Summary

This study was conducted during the months of February and March of the year 2023 within the Zintan city plan.

of which.

then, he counted (56) species of naturally growing annual plants.

these species belong to (45) genera distributed over (22) families.

the results also showed the life forms of species present in the study area, where the number of above-surface plants was (3) with a percentage of (5.3%).

) and the number of terrestrial plants (1), with a rate of (1.8%), and the number of semi-terrestrial plants (10) species, with a rate of (17.9%), while the largest number was seasonal plants (therophytes, which reached (35) species, with a percentage of (62.5%) and based on the number of plant species, four species were dominant in the study area, which is the most abundant species (asteraceae), with (13) species, followed by (brassicaceae) represented by (8) species, then poaceae).

it is represented by (6) types of annual plants, followed by the leguminous family (faboidceae), which is represented by (5) species.

it was also found that perennial plants are represented by (13 species), and annual plants are represented by (43 species) belongs to Mediterranean Sea.



عمر الطاهر عمر الهلاك، (04-2023)، الاكاديمية الافريقية لدراسات المتقدمة: الاكاديمية الافريقية لدراسات المتقدمة، 2

علاقة النبات بالتربة في منطقة غابة الكشاف الزنتان
مقال في مجلة علمية

هدف الدراسة الي تقييم الغطاء النباتي الطبيعي وتحليله لمعرفه المجتمعات النباتية السائدة والتي لم تتأثر بالتحضر ونشاط الأنسان الزائد في المنطقة، ودراسة علاقة الغطاء النباتي بالبيئة المحيطة. والنتائج التي تم الحصول عليها من هذه الدراسة يمكن تلخيصها على النحو التالي. تم تحليل الكساء النباتي باستخدام عشرة مواقع (0.50×0.50سم) لمعرفة إنتاجه النباتات والسائد منها وتصنيفها. تبين من الدراسة وجود ارتباط قوي بين عوامل التربة وتوزيع الكساء النباتي على الحاجز الرملي وكانت أهم العوامل كربونات الكالسيوم وملوحة التربة. وتشير عمليات الرصد الحقلي للغطاء النباتي لفصل الربيع – 2022م حيث تم تسجيل أربعين نوع نباتي تنتمي الي سبعة عشر عائله نباتيه، ويقطن بالمنطقة عدد من الأنواع النباتية السائدة والتي بها الكثير من التباين في النوع والكثافة. معظم النباتات المسجلة ذات طابع مستديم، جميع الأنواع التي سجلت خلال الدراسة الحالية لها العديد من الأدوار والأهمية البيئية والاقتصادية.

عمر الطاهر عمر الهلاك، (10-2022)، مجلة الجامعي: مجلة الجامعة، 35

Response to salt stress of two wetland grasses of forage potentialities
Journal Article

Abstract

The growth of two wetland forage grasses Leptochloa fusca (L.) Kunth. and Echinochloa stagnina (L.) P. Beauv. was investigated under NaCl salinity regarding the morphological traits, plant chemical composition, photosynthesis and the antioxidant enzymes POD and CAT. Plants of both species were irrigated with 0, 50, 100, 200, 300 and 400 mM NaCl in a sand/perlite mixture of 1:1 (v/v). Salinity negatively affected morphological traits and plant biomass of both species, particularly E. stagnina. Soluble sugars and proline within limits, protein contents of the foliage were increased to different extents by increasing salinity, but insoluble sugar decreased. K+/Na+ ratio of shoot and root of both species was decreased as a consequence of Na+ accumulation and restricted K+ uptake. NaCl salinity adversely affected photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency of both species particularly E. stagnina. Tolerance of L. fusca and E. stagnina to salinity stress can be based on stomatal closure and reduction in leaf area, in order to minimize water loss via transpiration and increase the activity of some antioxidant enzymes to detoxifying ROS generated during stress.


Omar Altaher Omar Alhlak, د. ممدوح سراح ود. هبة شعبان, (01-2021), المجلة البرازيلية لعلم النبات: دار العلوم, 35