كلية الزراعة طرابلس

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نفتخر بما نقدمه للمجتمع والعالم

322

المنشورات العلمية

185

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933

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857

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البرامج الدراسية

بكالوريوس علوم زراعية
تخصص الزراعات المائية

إيمانا من كلية الزراعة بأهمية البحر واستغلال ثرواته الهائلة مصدرا مهما للبروتين الحيواني...

التفاصيل
بكالوريوس علوم زراعية
تخصص الهندسة الزراعية

1.       استخدام النظريات الهندسية وتطبيقاتها المختلفة مع العلوم الزراعية...

التفاصيل

من يعمل بـكلية الزراعة طرابلس

يوجد بـكلية الزراعة طرابلس أكثر من 185 عضو هيئة تدريس

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منشورات مختارة

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دراسة القيمة الغذائية ونسب بعض المعادن لأربيان الأجاج Artemia salina L., 1758 بسبخة ابي كماش.

Abstract Due to scarcity of ecological studies concerning salt lakes and salt marshes in Libya, this study was carried on Abu-Kammash sebkha during winter and spring seasons of 2006 ; that have high density of Artemia. Cysts of Artemia were collected from the water and the edges of Abu-Kammash, and the external and internal diameters of cysts were measured, also the cysts hatching properties were estimated; nutrional value have been also conducted for cysts and larvae (instar I) and adults. The results show fluctuations in the measurements of the diameters of encapsulated and capsulated cysts. The diameters of encapsulated cysts were higher in spring than in winter and vice versa for capsulated cysts. The thickness of alveolar layer was double in spring (12.39%) than in winter (6.76%). The percentage of hatching was nearly the same during the first 24 hours, but different during the 48 and 72 hours of the experimental time. The percentage and efficiency of hatching were higher in spring than in winter. The study of nutrional value for Artemia individuals indicated that the percentage of protein was higher than any of the other contents (organic and inorganic), and the protein percentage of larvae was higher than the cysts and mature individuals of Artemia. The lipid content of Artemia( cysts, larvae, adults) was low. This problem can be avoided by using enrichment when Artemia used in aquaculture. The concentration of iron was higher than cupper which indicates that respiratory pigment of Artemia is hemoglobin rather than hemocyanin; where as the concentration of magnesium in adult Artemia was higher than in young stages; with due to environmental media.
Magda Saleh Elwalid(1-2022)
Publisher's website

Assessing the value of soil inorganic carbon for ecosystem services in the contiguous United States based on liming replacement costs

Soil databases are very important for assessing ecosystem services at different administrative levels (e.g., state, region etc.). Soil databases provide information about numerous soil properties, including soil inorganic carbon (SIC), which is a naturally occurring liming material that regulates soil pH and performs other key functions related to all four recognized ecosystem services (e.g., provisioning, regulating, cultural and supporting services). However, the ecosystem services value, or “true value,” of SIC is not recognized in the current land market. In this case, a negative externality arises because SIC with a positive value has zero market price, resulting in the market failure and the inefficient use of land. One potential method to assess the value of SIC is by determining its replacement cost based on the price of commercial limestone that would be required to amend soil. The objective of this study is to assess SIC replacement cost value in the contiguous United States (U.S.) by depth (0–20, 20–100, 100–200 cm) and considering different spatial aggregation levels (i.e., state, region, land resource region (LRR) using the State Soil Geographic (STATSGO) soil database. A replacement cost value of SIC was determined based on an average price of limestone in 2014 ($10.42 per U.S. ton). Within the contiguous U.S., the total replacement cost value of SIC in the upper two meters of soil is between $2.16T (i.e., 2.16 trillion U.S. dollars, where T = trillion = 1012) and $8.97T. States with the highest midpoint total value of SIC were: (1) Texas ($1.84T), (2) New Mexico ($355B, that is, 355 billion U.S. dollars, where B = billion = 109) and (3) Montana ($325B). When normalized by area, the states with the highest midpoint SIC values were: (1) Texas ($2.78 m−2), (2) Utah ($1.72 m−2) and (3) Minnesota ($1.35 m−2). The highest ranked regions for total SIC value were: (1) South Central ($1.95T), (2) West ($1.23T) and (3) Northern Plains ($1.01T), while the highest ranked regions based on area-normalized SIC value were: (1) South Central ($1.80 m−2), (2) Midwest ($0.82 m−2) and (3) West ($0.63 m−2). For land resource regions (LRR), the rankings were: (1) Western Range and Irrigated Region ($1.10T), (2) Central Great Plains Winter Wheat and Range Region ($926B) and (3) Central Feed Grains and Livestock Region ($635B) based on total SIC value, while the LRR rankings based on area-normalized SIC value were: (1) Southwest Plateaus and Plains Range and Cotton Region ($3.33 m−2), (2) Southwestern Prairies Cotton and Forage Region ($2.83 m−2) and (3) Central Great Plains Winter Wheat and Range Region ($1.59 m−2). Most of the SIC is located within the 100–200 cm depth interval with a midpoint replacement cost value of $2.49T and an area-normalized value of $0.34 m−2. Results from this study provide a link between science-based estimates (e.g., soil order) of SIC replacement costs within the administrative boundaries (e.g., state, region etc.). arabic 19 English 114
Garth Groshans, Elena Mikhailova, Christopher Post, Mark Schlautman, Hamdi Zurqani, Lisha Zhang(12-2018)
Publisher's website

Phenotypic and molecular characterization of small ruminant breeds in Libya – Field Guide

التوصيف المظهري و الجزيئي لسلالات المجترات الصغيرة في ليبيا - الدليل الحقلي
Abdulkarim Emhemed Ahtash, A. A-Marimi, A.K. Mahmoud, Ali Nefzaoui, Barbara Rischkowsky, A. Shryha A. Termanini, Markos Tibbo(1-2010)
Publisher's website

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