https://dspace.univ-ouargla.dz/jspui/handle/123456789/10022 2026-04-24T09:57:59Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/10024 Titre: ANALYSE DESCRIPTIVE ET FACTEURS D’ÉVOLUTION DES NUMÉRATIONS CELLULAIRES INDIVIDUELLES DU LAIT CHEZ DES PETITS TROUPEAUX BOVINS HORS SOL DANS LA RÉGION DE MONASTIR (TUNISIE) Auteur(s): SADAK Youssef; MIGHRI Leila Résumé: The objective of this study is to analyze the variation of individual cell counts (CCI) of cows during an entire lactation while insisting on the effect of main variables of evolution. The monitoring was conducted on a sample of 40 non-grazing cattle farms in the region of Monastir (Tunisia). Mammary health diagnosis was performed by the method of direct cell count on individual cow milk using a cell counter of type Fossomatic4000. It appears from this study that CCI distribution, according to two rules estimation, gives two different results for the samples of healthy milk. In fact, 48% of samples correspond to a normal or healthy milk with CCI ≤ 200000 cell. / ml, while 57% of the samples are from healthy udders with CCI ≤ 300000 cell. / ml. It also noted that 66% of cows have arithmetic CCI > 200000 cell. / ml, whereas 52% of cows present geometric CCI > 200000 cell. / ml. In this overall context, and to better assess the distribution of CCI, it was used quartiles diagram which confirmed the reliability of using the geometric method for the study of CCI. In addition to the variation of CCI according to the study methodology, changes can result from physiological factors related to the cow. Indeed, the CCI are lower in the beginning of lactation for primiparas compared with the end of lactation and multiparas. For the relation between milk production and CCI, this latter was recorded lowest at peak lactation of cows. These results coincide exactly with those reported in previous studies Description: Algerian Journal of Arid Environment 2015-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/10035 Titre: COMPOSITION AVIFAUNISTIQUE DANS UN REBOISEMENT DE PIN D’ALEP A CHBIKA (AIN MAÂBED-DJELFA, ALGERIE) Auteur(s): SOUTTOU Karim; SEKOUR Makhlouf; ABABSA Labed; GUEZOUL Omar; CHOUKRI Karima; DOUMANDJI Salaheddine Résumé: In this study 38 birds species were listed in the main forest of Chbika by the method of the EFP and that of the IPA These species was distributed between 6 orders and 15 families whose 30 species were inventoried by the EFP and 26 species by the IPA the common species between both methods is 19. The order of Passeriformes was best represented with 10 families and 27 species. The dominant species counted by the EFP method was the Coal Tit (Periparus ater) and the Chaffinch (Fringilla coelebs) with 58 individuals each species (16.4%). While the Common Crossbill (Loxia curvirostra) and Crested Lark (Galerida cristata) were most counted by the I.P.A. methods with respectively 13.6% and with 12%. Description: Algerian Journal of Arid Environment 2015-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/10033 Titre: EFFET DE LA CONTRAINTE SALINE SUR LA GERMINATION ET LA CROISSANCE DE QUELQUES PROVENANCES ALGERIENNES D’ARGANIER (Argania spinosa L.) Auteur(s): NASRI Souhila; BENMAHIOUL Benamar Résumé: In arid and semi-arid areas of the Mediterranean basin, the salinization of the soil constitutes one of the most important abiotic factors limiting plant growth and the productivity for many cultures. The introduction of tolerant plants to salinity is one of the techniques recommended to develop the soil touched by this phenomenon. The argan belonged to these species with great potential. This work aimed to compare the comportment of three provenances of argan collected from Tindouf and subjected to the saline stress since the stage of germination. The seeds coming from Merkala, Oued-Bouyhadine and Oued-El Gahaouane. The saline constraint was induced by the application of various NaCl concentrations: 0; 4; 8 and 16 g.l -1. The effect of the saline stress on germination showed a variability of tolerance between the various provenances tested. The seeds resulting from Oued Bouyadhine are most resistant to salt, where the rate of germination was about 66.7 % in the presence of the highest salt concentration tested. Therefore, the effect of saline constraint on the growth of young sowings was analyzed. Results showed that the different growth parameters studied, vary according the provenance studied. Indeed, the aerial part is more sensitive to salt than the root part for all provenance tested. Moreover, the provenance of Merkala is shown most sensitive to the salinity stress. Description: Algerian Journal of Arid Environment 2015-12-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/10026 Titre: TECHNIQUES DE CONSERVATION DES EAUX ET DU SOL DANS LE BASSIN VERSANT D’OUED SIDI SALAH (SFAX-TUNISIE): ESSAI D’EVALUATION Auteur(s): FOURATI Marwa; BOUAZIZ Riadh; El AMRI Asma; MAJDOUB Rajouene Résumé: The watershed of Oued Sidi Salah (Sfax, Tunisia) had a change in the agricultural landscape which has affected the dynamics of the river system and has aggravated the water erosion. This erosion appears differently in the study area. Faced to those plagues, many works of Water and soil Conservation were present. This work aims to study and analyze the existing development in the watershed by using tools of the geographic information system. After development of multi resources database using a set of softwares, different thematic maps were obtained. These allowed not only having an update of the data and making a spatial analysis of the environment, but also the ability to overlay several themes at once. An evaluation test of these works, their shape and their effectiveness has been presented and accompanied by some recommendations on actions taken and planned. This work has tried to focus on the need of having a global view of environment degradation problems throughout the watershed. This task will allow to find the right solutions and to distribute tasks according to priority areas Description: Algerian Journal of Arid Environment 2015-12-01T00:00:00Z