DSpace Collection:https://dspace.univ-ouargla.dz/jspui/handle/123456789/84312024-03-29T02:10:31Z2024-03-29T02:10:31ZEFFECTS OF SULLA CROP (Hedysarum coronariumL.) CONDUCTED IN DIRECT AND CONVENTIONAL DRILLINGS, ON THE PHYSICO-CHEMICAL PROPERTIES OF CLAY SOIL UNDER TUNISIAN SEMI-ARID CLIMATEBOUAJILA KhedijaBEN JEDDI Faysalhttps://dspace.univ-ouargla.dz/jspui/handle/123456789/88292019-05-08T11:47:21Z2015-06-01T00:00:00ZTitre: EFFECTS OF SULLA CROP (Hedysarum coronariumL.) CONDUCTED IN DIRECT AND CONVENTIONAL DRILLINGS, ON THE PHYSICO-CHEMICAL PROPERTIES OF CLAY SOIL UNDER TUNISIAN SEMI-ARID CLIMATE
Auteur(s): BOUAJILA Khedija; BEN JEDDI Faysal
Résumé: The sulla crop (Hedysarum Coronarium L.) variety Bikra 21 was conducted in direct and conventional drillings, for treating the effects of this crop on some physicochemical properties of sloping land (6%). The experimental area is situated at Bou Salem (higher semi-arid) in the governorate of Jendouba (north-west of Tunisia). The organic sulla restitution has contributed to improve the contents of organic matter principally in layer. Indeed, the rates exceeded 3% in direct sowing as well as in the conventional one. However, the field in direct drilling was characterized by higher nitrogen contents (from 0.35 to 0.40 %). The presence of sulla improved soil structural stability (from 1.22 to 1.97 %) in direct drilling. Therefore, the cation exchange capacity was improved in layer, and was found better under the conditions of the direct drilling (from 60.2 to 65 meq/100g of soil) than in the conventional one (from 59 to 63.3 meq/100 g of soil). It should be noted that the presence of residues, especially on the surface supported the permeability of the ground, was mainly in direct drilling where the permeability was higher (17.83 cm/h in the surface of direct drilling versus 13.92 cm/h in the conventional one).
Description: Algerian Journal of Arid And Environment (AJAE)2015-06-01T00:00:00ZETUDE COMPARATIVE DES ACTINOBACTERIES DE LA RHIZOSPHERE DE DEUX CULTIVARS DE PALMIER DATTIER SENSIBLE ET RESISTANT AU BAYOUDLAMARI LyndaBOURAS NoureddineBOUDJELLA HadjiraSABAOU Nasserdinehttps://dspace.univ-ouargla.dz/jspui/handle/123456789/88282019-05-08T11:47:44Z2015-06-01T00:00:00ZTitre: ETUDE COMPARATIVE DES ACTINOBACTERIES DE LA RHIZOSPHERE DE DEUX CULTIVARS DE PALMIER DATTIER SENSIBLE ET RESISTANT AU BAYOUD
Auteur(s): LAMARI Lynda; BOURAS Noureddine; BOUDJELLA Hadjira; SABAOU Nasserdine
Résumé: This report deals with the qualitative and quantitative distribution of the actinobacteria in the rhizosphere of two date-palm cultivars, one sensitive and one resistant to fusariosis, and with the antagonistic capacity of these microorganisms against the fungal pathogen Fusarium oxysporum f. sp. albedinis. The highest actinobacterial densities are noticed in the rhizospheric soils of the susceptible cultivar. However, we observed that the dominant species are present in the roots of resistant cultivar, and some strains tested were very effective against F. o. albedinis. Differences in the composition of genera and species are found between cultivars. Actinobacteria are mainly represented by the genera Streptomyces and Nocardioides with a net decrease in the percentage of Streptomyces, especially from endorhizosphere, going from resistant cultivar to healthy susceptible cultivar or mainly sick.Numerically, the most important species are related to Streptomyces chartreusis, Streptomyces gannmycicus and Nocardioides albus.
Description: Algerian Journal of Arid And Environment (AJAE)2015-06-01T00:00:00ZEtude du potentiel de contamination des eaux de la nappe phréatique de la région de Ouargla (Sahara septentrional Est Algérien)SLIMANI RabiaGUENDOUZ Abdelhamidhttps://dspace.univ-ouargla.dz/jspui/handle/123456789/88362019-05-08T11:50:30Z2015-06-01T00:00:00ZTitre: Etude du potentiel de contamination des eaux de la nappe phréatique de la région de Ouargla (Sahara septentrional Est Algérien)
Auteur(s): SLIMANI Rabia; GUENDOUZ Abdelhamid
Résumé: Ouargla’s basin (Southeast of Algeria), is currently suffering from natural and anthropogenic groundwater degradation. This work was carried out in order to study the vulnerability and risk of contamination through the aquifer mapping and chemical parameters.The hydro-chemical study showed that the waters of the aquifer have a chemical facies dominant sodium chloride and sodium sulfate. The water temperature varies between 17.2°C and 29.4°C, the pH ranges from 6.33 to 9.16 and the electrical conductivity oscillates between 1.91 and 263 dS.m-1. These results reflect a strong mineralization of water in the region.The results obtained of the indices of organic pollution (IPO) and contamination index (CI) show an organic pollution that affects more than 64% of the measurement points and a mineral pollution of 73 %. The degree of vulnerability recorded increase from upstream to downstream of the basin in the direction of groundwater flow toward the north (Sebkhet Safioune) and the other to the West (Sebkhet Bamendil)
Description: Algerian Journal of Arid And Environment (AJAE)2015-06-01T00:00:00ZMCHANGEMENTS CLIMATIQUES ET RESSOURCES EN EAU EN ALGÉRIE: VULNÉRABILITÉ, IMPACT ET STRATÉGIE D’ADAPTATIONNICHANE MohamedKHELIL Mohamed Anouarhttps://dspace.univ-ouargla.dz/jspui/handle/123456789/88322019-05-08T11:50:55Z2015-06-01T00:00:00ZTitre: MCHANGEMENTS CLIMATIQUES ET RESSOURCES EN EAU EN ALGÉRIE: VULNÉRABILITÉ, IMPACT ET STRATÉGIE D’ADAPTATION
Auteur(s): NICHANE Mohamed; KHELIL Mohamed Anouar
Résumé: The climate changes for a long time ceased being a scientific curiosity. They constitute the major environmental question which dominates our time and the major challenge to which must answer the environmental organizations of control. Water, one of the most important raw materials in Algeria. Because of its importance, it is essential to know its vulnerability with the climate changes, in Algeria. In Algeria, the vulnerability with the climate changes is expressed through several aspects: demographic explosion, probable reduction in the water run-offs, scarcity of the resources, the degradation of the hydraulic infrastructures, threats at wetlands… etc. Face this situation, Algeria took quantitative and qualitative measures adaptive within the framework of a durable management of this invaluable resource for the future.
Description: Algerian Journal of Arid And Environment (AJAE)2015-06-01T00:00:00Z