نظرة عامة حول البروبوليس، خصائصه واستخدامه من طرف النحل

دباب مختارية,  تومي بن علي فوزية, 

الملخص: البروبوليس هو مادة صمغية ذات طبيعة راتنجية يجمعها النحل من راتنج بعض الأشجار الصنوبرية ومن براعم النباتات من أجل استخدامها في ترميم خلاياه وحماية مستعمرته. للبروبوليس تاريخ قديم وباع طويل في استعماله كعلاج منذ عهد الحضارة الفرعونية القديمة، ليكتشف فيما بعد غناه بالعناصر الفعالة وخصائصه البيولوجية المميزة، وذلك بعد تطور البحث العلمي وأدواته. ويختلف تركيب البروبوليس وخصائصه حسب المنطقة الجغرافية والظروف المناخية السائدة في مكان جمعه. يستخلص البروبوليس عادة في الكحول الإيثيلي المطلق، أو بنسبة 70°، وهذه المستخلصات الكحولية هي الشكل الدوائي للعكبر الذي يستخدم في العلاج عامة.

الكلمات المفتاحية: البروبوليس ; العناصر الفعالة ; الخصائص البيولوجية ; المستخلصات الكحولية

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Variation and relationships among agronomic traits in Algerian sympatric

Chebouti Abderrezak,  Meziani Nassila,  Laib Mohamed, 

Résumé: Legumes of the genus Medicago have particular ecological and agro-pastoral importance in the Mediterranean regions. This work was initiated in order to develop local species by identifying and selecting suitable cultivars. The main objective of this study is to assess the variation and relationships among agronomic traits in four sympatric populations of Medicago minima and Medicago truncatula collected in different sites of Djelfa. The trial was conducted during the 2016/2017 cropping season. The study focused on dry matter yield and pod and seed production. Populations were sown on 22 December 2016 at a density of 100 scarified seeds/ row of 1 m long spaced by 1.5 m. A randomized block design with 03 replications was used. Results obtained show that the populations of the three species differ significantly for all measured variables. Analysis of variance showed significant difference between populations. Higher degree of variation for the most of agronomic traits was observed among sympatric populations of M. minima and M. truncatula. From the obtained results, several populations had good biomass and high yield of seed and pod. These populations could be developed and exploited in pastures in Algeria.

Mots clés: Medicago truncatula, Medicago minima, seed yield, forage yield, variability.

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Écologie et anthropisation des habitats naturels de trois micros bassins versants adjacents du centre du Togo

Bawa Demirel Maza-esso,  Folega Fousseni,  Atato Abalo,  Diwediga Badabaté,  Wala Kperkouma,  Akpagana Koffi, 

Résumé: The assessment carried out in the watershed landscape of three watersheds in central Togo is a contribution to the sustainable management of habitats. 122 sampling points made up of 5 ha plots following a 1000 m grid was regularly generated and then superimposed on the vector of the study area thanks to the QGIS software. The resulting grid was imported into the Collect Earth complex and constellation of spatial platforms (Google Earth, Bing Map, and Yahoo Map) with high-resolution images (Spot, IKONOS, Digital Globe ...). Then a floristic inventory was carried out from 30 plots of 900 m2 following a regular 100 m grid in the Agbandi community forest (FCA). According to the IPCC land classification system, 47,54%; 22,95% and 8,19% represent respectively the occupancy rates of cultivated land, wetlands/prairies and forest land for an accuracy rate of 98,36%. Spatial exploration also reveals that 55,73% of the sample plots are not accessible; however 15,57% and 13,93% of the plots are located respectively between 2-3 km and 3-5 km from the tracks. The FCA florula is composed of 131 species divided into 117 genera and 43 families. Fabaceae and Rubiaceae are the most important families. Sudano Zambézian and Sudano Guinean species dominate this flora. Four plant groups composed of Vitellaria paradoxa savannahs; Tectona grandis open forests; Isoberlinia doka and Pterocarpus erinaceus have been identified. This study, which is the first of its kind, opens perspectives for modeling forest production and productivity of these ecosystems protected by endogenous values.

Mots clés: sustainable management ; Collect Earth ; watershed ; forest ; Togo

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Evaluation de la performance de dix-huit modèles d’estimation de l’évapotranspiration de référence dans les conditions subhumides de la Mitidja

Belkhiri Farouk Eddine , 

Date de réception: 28-12-2019    Date de publication: 06-04-2021    pages  5-32.   

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Estimation de la production laitière chez les brebis Tazegzawt durant le premier mois d’allaitementEstimation de la production laitière chez les brebis Tazegzawt durant le premier mois d’allaitement

El Bouyahiaoui Rachid ,  Hidra Hayette ,  Djaout Amal , 

Date de réception: 07-04-2020    Date de publication: 06-04-2021    pages  33-42.   

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IMPORTANCE NUTRITIONNELLE ET AGRO-ECONOMIQUE DES PRODUITS ISSUS DU FIGUIER DE BARBARIE : REVUE DE LA LITTERATURE.

Mazari Azzedine ,  Mahdeb Amokrane , 

Date de réception: 10-05-2020    Date de publication: 06-04-2021    pages  43-63.   

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LES EXPLOITATIONS OLEICOLES EN ALGERIE ; QUELLE PERFORMANCE ECONOMIQUE ?

Amrouni Sais Haoua ,  Fethallah Rabah ,  Fahas Mohamed , 

Date de réception: 10-05-2020    Date de publication: 06-04-2021    pages  65-76.   

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Amélioration de l’efficience d’utilisation du phosphore et de potasse par la culture du blé dans les régions sahariennes

Laaboudi Abdelkader ,  Mouhouche Brahim , 

Date de réception: 11-05-2020    Date de publication: 06-04-2021    pages  77-95.   

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Valorisation technologique des dattes de faible valeur marchande par la production du sirop

Djafri Kaouthar ,  Khemissat Elhayfa ,  Bergouia Meriem ,  Hafouda Sabrina , 

Date de réception: 28-07-2020    Date de publication: 06-04-2021    pages  97-114.   

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