https://dspace.univ-ouargla.dz/jspui/handle/123456789/3997 2026-05-02T03:32:33Z 2026-05-02T03:32:33Z DJERROUDI–ZIDANE Ouiza EDDOUD Amar KELLILI Mohamed https://dspace.univ-ouargla.dz/jspui/handle/123456789/6742 2019-05-09T10:55:37Z 2011-12-01T00:00:00Z

Titre: EFFET DES EXTRAITS AQUEUX DE VEGETAUX SUR LES NEMATODES PHYTOPARASITES DU GENRE Meloidogyne spp. Auteur(s): DJERROUDI–ZIDANE Ouiza; EDDOUD Amar; KELLILI Mohamed Résumé: The ability to fight against Meloidogyne sp nematodes was tested using aqueous extracts of four spontaneous cultivated plants with virtues nematicidal. The results showed that Meloidogyne behave differently towards plant extracts. These data indicate that the inhibition rate of the outbreak increases when the solution concentration is high. Thus, among the plants tested, it is the root and leaf extracts of Punica granatum which showed a strong inhibition of the outbreak while the rates obtained were 91.7% and 90.3% after (08) days of exposure respectively. Concerning the influence of these plants on juvenile’s mortality, there is increase of mortality rate according to exposure and concentration time. It reached 71.3% and 70% respectively for root and leaf extracts of Lawsonia inermis and 69.6% for root extracts of Arachis hypogaea after 72 hours of exposure. Description: Revue des bioressources

2011-12-01T00:00:00Z CHAABENA Ahmed LAOUAR Meriem GUEDIRI Ouarda BENMOUSSA Ali ABDELGUERFI Aïssa https://dspace.univ-ouargla.dz/jspui/handle/123456789/6740 2019-05-09T10:56:26Z 2011-12-01T00:00:00Z

Titre: QUELQUES POPULATIONS SAHARIENNES DE LUZERNE PERENNE (Medicago Sativa L.) FACE A UN STRESS HYDRIQUE Auteur(s): CHAABENA Ahmed; LAOUAR Meriem; GUEDIRI Ouarda; BENMOUSSA Ali; ABDELGUERFI Aïssa Résumé: This topic covers some Saharan populations and an introduced variety of perennial alfalfa (Medicago sativa L.) subjected to moisture stress materialized by different concentrations of PEG-400 in order to compare their degree of drought resistance. For this, we selected fourteen (14) populations and a variety introduced (Italian) for 05 irrigation solutions with different concentrations of PEG (1%, 5%, 10%, 20% and 50%) in addition to the control (distilled water). The results show that the threshold for adaptation to drought depends on the growth phase and the population itself. Similarly, an osmotic pressure of approximately 142.8682 bar (50% PEG) of irrigation solution shows a total cessation of all development processes in most populations, although there is that growth stops well before others and beyond. Also, most people are more sensitive (low levels of the used parameters) to zero pressure (distilled water) at low osmotic pressures. We found very highly significant differences between populations for the studied parameters. Subsequently, the Principal Component Analysis (PCA) and hierarchical ascending classification (HAC), allowed us to identify 04 groups of population based on their resistance to drought, taking into consideration all the results obtained for the different parameters: · Group 1 (very low resistance): Italy; · Group 2 (low resistance): Janet, In Salah, Hassi Laabid, Ouargla and Saudia; · Group 3 (medium resistance): Aoulef and Tamentit; · Group 4 (high resistance): Chott, Hassi Ben Abdallah, Blidet Amor, Temacine, Nezla, Meggarine and Lioua Description: Revue des bioressources

2011-12-01T00:00:00Z BOUALLALA M’hammed CHEHMA Abdelmadjid https://dspace.univ-ouargla.dz/jspui/handle/123456789/6743 2019-05-09T10:55:05Z 2011-12-01T00:00:00Z

Titre: BIODIVERSITE ET PALATABILITE DES PLANTES DES PARCOURS CAMELINS A TALH « ACACIA RADDIANA » DANS LA REGION DE TINDOUF (ALGERIE) Auteur(s): BOUALLALA M’hammed; CHEHMA Abdelmadjid Résumé: So far few studies have been carried on plants palatability within dromedary rangelands. Hence, our contribution focuses mainly on the floristic richness study and classification of dromedary rangelands plants of Acacia raddiana in the region of Tindouf according to their degree of palatability. For this purpose, thirty samples were collected within variable geomorphic units, namely tributary streams and wadis. The results show that the richest rangeland in species is the wadi with superficial silting. Besides, the analysis of the biological spectrum shows an overall prevalence of the therophytes. Moreover, the analysis of the palatability spectrum shows an overall prevalence of the plants with high and average appetency. This dromedary rangelands richness in various plants, integrate a wide range of palatability reflecting the selective feeding behavior of the dromedary. Indeed, it better consumes available resources in its natural environment and contributes to biodiversity conservation.

2011-12-01T00:00:00Z TRABELSI Hafida CHAABENA Ahmed TOUATI Aicha https://dspace.univ-ouargla.dz/jspui/handle/123456789/6744 2019-05-09T10:55:23Z 2011-12-01T00:00:00Z

Titre: CINETIQUE DES PLANTES SPONTANNEES APRES L’ABANDON D’UN CHAMP CEREALIER; CAS DE LA REGION DE OUARGLA Auteur(s): TRABELSI Hafida; CHAABENA Ahmed; TOUATI Aicha Résumé: Changing the floristic component is particularly interesting in the agroecosystem. In arid areas, the introduction of cropsunder pivot, induced floristic diversity is significant. Our work lies in the impact of introductions of plant species on the floristic composition of biodiversity after the establishment of a crop under pivot followed by a stop. For this, we used three pivots at different ages of abandonment: 01 year, 02 years and 3 years at the region of Hassi Ben Abdallah in Ouargla. Surveys conducted during the sampling period, from the month of February (2005) until March (2005), led to inventory 22 species distributed in 10 botanical families. The analysis of results highlighted the predominance of the species Bromus rubens in three study sites, with a very high degree of presence. In addition, stations 1 and 2 show a low floristic diversity compared to station 3, which reflects a wide variation in the floristic component, it is probably related to the age of abandonment and human actions. Description: Revue des bioressources

2011-12-01T00:00:00Z