https://dspace.univ-ouargla.dz/jspui/handle/123456789/18590 2026-05-09T15:31:18Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/19251 Titre: CONTRIBUTION DE LA GEOSTATISTIQUE MULTIPARAMETRIQUE POUR LA CARTOGRAPHIE DE L’APTITUDE DES EAUX SOUTERRAINES A L’IRRIGATION (CAS DU MOYEN CHELIFF OCCIDENTAL) Auteur(s): ABDENNOUR Mohamed Amine; BRADAI Abdelhamid; DOUAOUI Abdelkader Résumé: This work deals with the physico-chemical quality of groundwater intended for irrigation and the prediction of their salinity in the mid-western Cheliff plain. Under a semi-arid climate, irrigation is unavoidable for most crops. As a result, groundwater is under increasing pressure. In addition to the quantitative problem, water quality does not always comply with irrigation standards as defined by individual schools. The evaluation of the quality of these waters was carried out by analyzing 63 boreholes, the aim of which was to find out their irrigation skills. A study on the spatial variation of electrical conductivity was carried out by applying geostatics, the spatial structure of which is determined by studying the variogram, three classes of salinity were found in this plain; (C3) medium quality; (C4) poor quality; and a quality not recommended for irrigation (C5). Water salinity maps were mapped using Arcgis software10.2. The mapping of the salinity of water by ordinary kriging has shown that the class (C3) largely dominant in the plain, It is a class qualified as very high salinity to be used with great care because it has an effect on the soil and the plant, However, the mapping of this salinity by multiparametric geostatistics allowed us to geolocate the location of the three groups in the study area. Description: Algerian Journal of Arid And Environment (AJAE) 2018-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/19246 Titre: ÉVALUATION DES CONDITIONS ET DES CADENCES DE TRAITE DANS DES FERMES OVINES LAITIÈRES EN TUNISIE Auteur(s): SADAK Youssef; ALOULOU Rafik; HAMDI Hania; GHAZOUANI Mohamed Résumé: Milking of Sicilo-Sarde dairy sheep breed in Tunisia remains always manual by calling qualified milkers who have become more and more rare. Some flocks using mechanical milking, but its use is still inefficient or inadequate. This study aimed to evaluate the technical and hygienic milking conditions in two dairy sheep areas in the North of Tunisia. Technical and hygienic milking conditions were evaluated on seven flocks of dairy sheep farming (four public farms, three of which use machine milking in pot, and three private farms). The diagnosis of the milking equipment had revealed a relatively satisfactory situation of the milking machines functioning. The pulsation rate had varied between 80 and 105 cpm. Also, the average milking cadence observed for mechanical milking was relatively low (65 ewes/hour/ milker), but it was acceptable for manual milking (50 ewes/hour/ milker). However, farms with mechanical milking did not have a milking hallway that disturbed ewe circulation and contention during milking. For hygienic milking practices, udder preparation and teat disinfection after milking were not carried out in all farms. These results indicate that a great improvement in hygienic practices should be made in dairy sheep farms. The study of the comparative impacts of mechanical milking of Sicilo-Sarda ewe on mammary health, teat integrity and milking comfort is needed to identify the appropriate settings for a best development of this system in Tunisia. Description: Algerian Journal of Arid And Environment (AJAE) 2018-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/19252 Titre: ENDOPHYTIC FUNGI AND FOLIAR EPIPHYTES OF Peganum harmala L. (ZYGOPHYLLACEAE) OF DAYATE AIAT (LAGHOUAT, ALGERIA) Auteur(s): OUZID Yasmina; SMAIL-SAADOUN Noria; HOUALI Karim Résumé: Whether epiphytes or endophytes, fungi live in complex interaction with the plants where both partners benefit. Our study was carried out on a spontaneous medicinal plant of the region Laghouat (Algeria): Peganum harmala. Our interest in this work has focused on the diversity of mycoendophytes and epiphytes in the leaves of this species. Ten healthy subjects were harvested in April 2015 at random. For the epiphytes, leaf suspensions were seeded on PDA and incubated at room temperature. As for mycoendophytes, surface sterilization of leaves was performed to remove epiphytic organisms that remain at the phylloplane. The fragments are seeded on PDA medium and incubated at room temperature. The microscopic identification revealed that the phyllosphere fungi of Peganum harmala belonged much more to the phylum Ascomycota. The genera listed indicate an abundance of the genus Penicillium and Rhizopus for the epiphytes, Cladosporium and Alternaria for mycoendophytes. This diversity is estimated by the global Shannon index with 1.78 for the epiphytes and 1.08 for the foliar endophytic fungi of this plant. Moreover, the overall ratio of similarity Sorensen is 0.62 between the fungal communities epiphytic and endophytic of these leaves. Significant interactions are described between different fungal taxa through a correlation matrix indicating the impact of these interactions on fungal biodiversity in leaves of Peganum harmala. Description: Algerian Journal of Arid And Environment (AJAE) 2018-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/19249 Titre: ARCHITECTURE RACINAIRE DE L’ARGANIER DE TOUIREF BOU AAM (TINDOUF, ALGERIE) Auteur(s): ACI Louiza; SMAIL-SAADOUN Noria; SAIDI Fairouz Résumé: In desert regions, development of root system and its orientation are not only closely linked to the physico-chemical composition, but also to the geomorphology of its substratum. The absorption of water represents a vital challenge for the botanical species. The argan tree is a strong example of adaptation in the conditions of aridity. Our study concerns the region of Tindouf (Algeria), where the argan tree remains in its most Southern and the most oriental area. It is with the aim of determining the root architecture of this species that the roots of twelve individuals, chosen at random to Touiref Bou Aam, were exposures. Biometric measures were made on the observed roots and samples of soil were taken for physico-chemical evaluations. The geomorphology was a support to understand the ecological situation and behavior of this species. The obtained results classified the individuals studied in two different groups separated according to the present correlations. A first group with numerous deep and little branched out roots evolving in a sands and unrefined silt predominant soil was observed on the realized PCA. This group is more centered on the anchoring of the tree. On the other hand, the second group contains samples with thick, very branched out superficial roots and some deep roots with a predominant sands and fine silt soil with an important retention capacity. A first representation of the space root distribution was performed. It allows to understand the root behavior of the argan tree in front of the extreme aridity of its environment. Description: Algerian Journal of Arid And Environment (AJAE) 2018-06-01T00:00:00Z