Browsing by Author "SOUILEM, Zineb"

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    Caractéristiques physico-chimiques des sols rhizosphériques cultivés d'arachide (Arachis hypgaea L.) dans la région de Ghardaia (cas de sebseb)
    (Faculté Science de la Nature et de la Vie et Sciences de la Terre - Université de Ghardaïa, 2024) SOUILEM, Zineb; LABGAA, Imene
    This study focuses on the analysis of the physicochemical characteristics of rhizospheric and non-rhizospheric cultivated groundnut soils (Arachis hypgaea L.) in the Ghardaïa region, case of Sebseb. It aims to compare the two soils in order to understand the effect of cultivation on soil quality improvement. The results showed that the majority of the soils were moderately alkaline (pH 8.05), with 20% of the samples in the pH range of 5.5 to 7.5. Salinity degradation was minimal and only 6.6% of the samples had electrical conductivity (EC) values greater than 1 dS m 1. The calcium carbonate content showed that the soils were moderately calcareous with an average of 6.5%. Soils were poor in organic matter (OM), only 3.3% of soils had organic matter levels above 2%. For potassium and sodium, their presence in the soil studied was moderate (SR64.01393, SNR64.52691) and (SR 98.77868, SNR 96.71689). For phosphorus, its presence in rhizospheric soil was higher than in non-rhizospheric soil (SR 61.87074, SNR56.25754). We noted that rhizospheric soil contains a higher total nitrogen (NT) concentration than non-rhizospheric soil (SR 0.04780574, SNR 0.02267073. Indeed, the T-Student Test results show significant disparities at the significance threshold α = 0.05 between the two soil types studied. The results of the correlation analysis showed the existence of positive correlations between pH and soluble potassium (KS) as well as between electrical conductivity (CE) and total and soluble sodium. On the other hand, there are significant negative correlations between pH/MO, MO/KS and pH/NT parameters
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    Contribution à l’étude de la faune scorpionique de la région de Ghardaïa (Algérie)
    (Faculté Science de la Nature et de la Vie et Sciences de la Terre - Université de Ghardaïa, 2017) LAHRECH, Ahlem; SOUILEM, Zineb
    Our research is to know both the quality and quantity of scorpions in Ghardaia, this research is applied on three station:Mansoura as reg,Sebseb represent a palm and Metlili as an urban station. During seven month, we gather 100 sample of scorpions, all being from the same family of Buthidae, which are Androctonus amoreuxi, Andrcotnus australis, Androctonus aeneas, Buthus saharicus et Buthacus samiae. That is 17.85% of the species declared in Algeria. Andrcotnus australis is the most existing one in the region of Ghardaya (60%) followed by Androctonus amoreuxi with 34%, where as the three other species B. samiae, A. aeneas and B. saharicus are less than 3%. the results of Relative abundance of species reveals that A. australis is the most dominant sample in both urban station and palms. on the other side A. amoreuxi is more existing in the reg with 76.67% . concerning the origin of A. aeneas is the reg but found in urban station with a least percentage (05%). for B. samiae and B. saharicus are rare in our research. The value of Shannon-Weaver Index in Ghardaia Showed that this region is a diverse of Scorpionic fauna in which there is unbalance between species. The reg is the most diverse (1.11bits) where as in the palms there is certain balance in species. At least The factorial analysis of the correspondences, applied to the species caught in the region of Ghardaia, reveals the existence of three species / biotopes affinity groups. A. amoreuxi in palm,A. aeneas in urban biotope, the two other species B. samiae and B. saharicus in the reg. Andrcotnus australis is an omnipresent species