https://dspace.univ-ouargla.dz/jspui/handle/123456789/27376 2026-04-10T13:15:17Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27416 Titre: SOURCES ET ORIGINES DE LA POLLUTION DE L’EAU DU FLEUVE NIGER AU NIVEAU DE LA VILLE DE NIAMEY Auteur(s): ADAMOU MARAFA M; TANKARI DAN BADJO A; ABDOU GADO F Résumé: The Niger stream, main source of provision in water of the city of Niamey, is threatened by various and multiform pollutions following the dismissals in the stream of the urban worn-out waters without previous treatment. The main objective of this survey is to diagnose the management of the sewages in the sources of their production and to study the features of the outlets of the dismissals of waters used of the city of Niamey clearing in Niger stream. To make itself/themselves, the gait assigned for this survey is based on the investigation of the land and the in-situ measures of the physico-chemical parameters as well as the debit of the dismissals of the worn-out waters. The investigation shows that the city of Niamey doesn't have any station of purification of the urban worn-out waters functional. Besides, on a number of nineteen (19) establishments investigated, only a minority of establishments, to the number of five (5), have functional purification station, of which one only is in stop of working. To the descended this survey the results watch that the city of Niamey rejects until 13 540 m3j-1 of waters used through thirty-two (32) points of the dismissals identified along the strands of the Niger stream in the city of Niamey. To these outlets, does the in-situ measures show that the pH varies from 5 to 8,45. The electric conductivity (THIS) varies 220 μS cm-1 to 8 095 μS cm-1; the Totals of the Salt Dissoutses (SDR) vary 112 ppm to 4 070 ppm and the chloride of sodium (NaCl) varies between 0,45% and 15,9%. The results descended of the investigation of the land testify a bad management of waters used since the sources where they are generated. As for the results gotten by the different measures, the value of some parameters to know EC, NaCl and SDR passes the one fixed by the World organization of Health (WHO), while the one of pH is on this side of the fork fixed by this one. To the look of these results, measures of treatment of these worn-out waters must be taken before their tipping in the Niger stream. Description: Revue des BioRessources 2020-12-31T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27415 Titre: GESTION DE LA FERTILITE DES SOLS DANS LES OASIS DE LA REGION DE GHARDAÏA (SAHARA SEPTENTRIONAL D’ALGERIE) Auteur(s): KHENE B; ARABA F; OTMANI R Résumé: In arid conditions, the rational management of soil fertility and water resources is crucial for the agro-ecological sustainability of fragile oasian systems. Their vulnerability is amplified by other aspects (various crops combined, salinization of soils, excessive evapotranspiration, and diverse parasites). The objective of this study is to establish, through an investigation on a sample of 58 farms, an analysis of the oasian farmer’s practices of their soils fertility management (organic amendments, crops rotation, and mineral in puts). A diversity of practices is carried out by farmers, both conservative and non-conservative of soil fertility on the relationship with available resources, strategies deployed and room for improvement. Positive trend is observed among oasian farmers to valorize animal and vegetable biomass produced on their farms and in the same time reduce their dependence on mineral fertilizers which prices have become exorbitant and not adapted to the physicochemical and biological characteristics of their soils Description: Revue des BioRessources 2020-12-31T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27413 Titre: EFFET D'UNE COMPLEMENTATION DES PATURAGES STEPPIQUES PAR DES REBUTS DE DATTES SUR LES PERFORMANCES PRODUCTIVES DES BREBIS OULED DJELLAL ET LA CROISSANCE DE LEURS AGNEAUX Auteur(s): ABAIDIA Abdelghafour; MEBIROUK-BOUDECHICHE Lamia; CHAKER-HOUD Kahina Résumé: It is known that feeding during the steaming period of ewes has a significant effect on the weight performance of lambs at birth. Consequently, the present study was carried out to determine the effect of supplementing with date scraps on the weight variations of Ouled Djellal sheep grazing steppes during the steaming period, and on the growth of their lambs. Thus, one hundred (100) multiparous ewes were synchronized then subjected to reproduction and randomly divided into two groups. The diet was based on forage from a meadow and barley stubble during the summer period. Two months before giving birth, the females of the experimental group were supplemented daily after return from pasture with date scraps (‘hachef ghars’) at the rate of 400 g / animal / day after an adaptation period of 15 days. The impact of this complementation was estimated by measuring the variation in the body condition of females (NEC), in addition to the weight at birth and the growth of their lambs (weight at D0, at D28, at D63 and at D90 of life). The statistical analysis using SAS (2004) revealed that the body condition of supplemented females was improved by 0.18 points, compared with a decrease of 0.20 point for the control group (P <0.05). This situation had a positive impact on the weights of the lambs since the weights from birth to D90 of lambs for supplemented females were significantly higher (P <0.05) than those of control lambs. As the diet at this stage of life is exclusively milk, date scraps help amelioration milk production for supplemented females. In conclusion, supplementation of females at the end of gestation with date scraps seems to have a positive effect both on their body conditions and on the growth of their lambs Description: Revue des BioRessources 2020-12-31T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27412 Titre: THE SERUM BIOCHEMICAL PROFILE OF THE RABBIT OF THE ALGERIAN POPULATION IN THE SEMI-ARID REGIONS OF AURES (BATNA) AT DIFFERENT PHYSIOLOGICAL STAGES Auteur(s): MOUMEN Souad; BOUCHAREB Chahrazed; ADJROUD Hamida Résumé: One hundred and twenty local Algerian female rabbits in first parity were used in this present study at the experiment farm of the University of Batna 1. The animals were divided into four equal groups with 30 replicates (empty female, pregnant female, pregnant-lactating female and lactating female only). Natural mating was used, the kits were weaned at 28 days. Four blood samples were collected on females at different physiological stages. The physiological status affected significantly (p < 0.05) cumulative BCS, milk yield, litter size and litter weight of does at birthing. Total protein, albumin, globulin, uric acid and creatinine concentrations as well as T3 and progesterone levels were higher (p < 0.05) in does of P-L group (5.70±1 g/dl, 2.98±0.07 g/dl, 1.88±0.06 g/dl, 34.9±3.4 mg/dl, 1.3±0.4 mg/dl, 44.3±0.93 ng/dl, 18.98±1.5ng/ml) respectively. The physiological status increased significantly (p < 0.05) total lipids, triglycerides and total cholesterol in does of P, P-L and L groups compared with their concentrations in E group. The physiological status affected alanine aminotransferase (ALT), aspartate aminotransferase (AST) and Alkaline phosphatase activities in does during pregnancy and suckling period (5.65±0.1UI/L, 22±1.3UI/L vs 5.45 ±0.22, 20.35±4.3UI/L). Does of P, P-L, and L groups had higher (p < 0.05) leptin levels. Insulin and glucose concentrations were increased in P and P-L groups compared to E and L groups. Description: Revue des BioRessources 2020-12-31T00:00:00Z