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Journal articles on the topic 'Productivité de l'eau'

Author: Grafiati

Published: 26 July 2023

Last updated: 31 July 2025

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1

Bengeni, D., P. Lim, and A. Belaud. "Qualité des eaux de trois bras morts de la Garonne variabilité spatio-temporelle)." Revue des sciences de l'eau 5, no. 2 (2005): 131–56. http://dx.doi.org/10.7202/705125ar.

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Pendant deux années, des mesures et analyses d'eau ont été faites mensuellement sur une station de la Garonne et sur trois bras morts différant par leur communication avec le fleuve. La variabilité spatio-temporelle a été dressée à partir de 14 variables physico-chimiques susceptibles d'influer les équilibres chimiques de l'eau et la vie aquatique. Les données ont fait l'objet d'une Analyse en Composantes principales précédée par une analyse de variance entre saisons et entre stations de mesures afin de déterminer l'importance des hétérogénéités spatiale et temporelle des données. L'eau du fle

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2

González-Camacho, Juan Manuel, Jean Claude Mailhol, and Françoise Ruget. "Impacts locaux attendus de l'augmentation du CO2 dans l'atmosphère sur la productivité de l'eau du maïs dans la Drôme, France." Irrigation and Drainage 57, no. 2 (2008): 229–43. http://dx.doi.org/10.1002/ird.332.

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3

Mandi, L., J. Darley, J. Barbe, and B. Baleux. "Essais d'épuration des eaux usées de Marrakech par la jacinthe d'eau (Charges organique, bactérienne et parasitologique)." Revue des sciences de l'eau 5, no. 3 (2005): 313–33. http://dx.doi.org/10.7202/705134ar.

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Cette étude est destinée à tester expérimentalement les capacités d'épuration des eaux usées par lagunage à macrophytes (jacinthe d'eau : Eichhornia crassipes), sous les conditions climatiques de Marrakech. L'installation fonctionne en continu avec un débit constant à l'entrée de 10 l/min. La charge admise est de 40 g DCO/M2/j. Sous l'aspect de la production de biomasse végétale, les effluents domestiques constituent un bon substrat nutritionnel. Les taux de croissance et les productions obtenues montrent dans l'ensemble une excellent adaptation d'Eichhornia crassipesà ce milieu. Le maximum de

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4

Larocque, Guy R., Jagtar Bhatti, Paul Hazlett, André Arsenault, and Alexander Komarov. "Section spéciale: Avancées des recherches sur la productivité, la succession, l'aménagement et les cycles du carbone et de l'eau en forêt boréale." Écoscience 21, no. 3-4 (2014): viii—x. http://dx.doi.org/10.2980/21-(3-4).

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5

Dembélé, Y., S. Ouattara, and A. Keïta. "Application des indicateurs “approvisionnement relatif en eau” et “productivité de l'eau” à l'analyse des performances des petits périmètres irrigués au Burkina Faso." Irrigation and Drainage 50, no. 4 (2001): 309–21. http://dx.doi.org/10.1002/ird.21.

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6

Saunders, George. "Employment and the Productivity Slowdown: 1958-1980." Articles 40, no. 2 (2005): 219–42. http://dx.doi.org/10.7202/050131ar.

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Le ralentissement de la productivité qui se généralise dans les pays industriels d'Occident demeure un mystère. On a beaucoup écrit sur le sujet, mais cela n'a révèle que peu de choses. L'un des résultats majeurs de l'intérêt que l'on porte à la productivité, c'est d'obtenir une information meilleure et des techniques de mesure améliorés. Cet article s'inspire des mesures de la productivité totale par facteur récemment mises au point et dont dispose le Conseil économique du Canada pour examiner les rapports entre les facteurs de production, principalement celui du travail, et la productivité.

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7

Moreki, J. C., M. I. Moseki, and T. Kopano. "Current status, challenges and strategies employed to raise the population of small ruminants in Botswana:Areview." Nigerian Journal of Animal Production 48, no. 6 (2022): 332–47. http://dx.doi.org/10.51791/njap.v48i6.3321.

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Sheep and goats (small ruminants) were the first two animals to be domesticated by humans mainly for meat, milk and byproducts. Asia holds the world's largest goat population (52%), followed by Africa (39%), Europe (5%), Americas (4%), and Oceania (<1%). This review article highlighted the current status of small ruminants in Botswana, challenges and efforts being made to increase national flock population. The latest statistics estimate the population of small ruminants in Botswana to be about 2 065 705 (i.e., 1 769 811 goats and 295 894 sheep). Two production systems exist and these are t

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8

Perrier, Christine, Claude Hillaire-Marcel, and Luc Ortlieb. "Paléogéographie littorale et enregistrement isotopique (13C, 18O) d’événements de type El Niño par les mollusques holocènes et récents du nord-ouest péruvien." Géographie physique et Quaternaire 48, no. 1 (2007): 23–38. http://dx.doi.org/10.7202/032970ar.

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RÉSUMÉ Des dépôts coquilliers récents et d'âge holocène ont été récoltés dans les régions côtières de Chao et Santa, au nord-ouest du Pérou. Ces assemblages ont été analysés pour leurs teneurs en isotopes lourds (13C, 18O) dans le but de reconstituer les changements paléogéographiques et paléoclimatiques. Une attention particulière a été portée au mollusque Trachycardium procerum afin d'examiner la signature isotopique du phénomène de type El Niho enregistrée dans la coquille par des anomalies de croissance. Les données M C obtenues sur les dépôts coquilliers indiquent un haut niveau marin dès

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9

Dauda, A. B., H. A. Salele, and O. G. Orimogunje. "Influence of feeding frequency and feeding time on growth performance and feed utilisation of African catfish (Clarias gariepinus Burchell 1822) fingerlings." Nigerian Journal of Animal Production 49, no. 1 (2022): 169–76. http://dx.doi.org/10.51791/njap.v49i1.3415.

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Feeds and feeding constitute the main cost in intensive aquaculture and effective fish feeding is a major determinant of success. There is limited information on the most appropriate feeding time and the combination of feeding frequency and time that can ensure the best productivity in the culture of African catfish. This research was therefore carried out to examine the influence of feeding frequency and feeding time on the growth performance and feed utilisation of African catfish (Clarias gariepinus) fingerlings was reared for 42 days. Fingerlings of C. gariepinus with initial weight 9.0± 0

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10

Adagbasa, Efosa G., and Olusola O. Ige-Olumide. "Geospatial Analysis of Coastal Flooding Effect on Soil and Vegetation in Ilaje Local Government Area of Ondo State, Nigeria." Journal of Geospatial Science and Technology 1, no. 1 (2014): 99–111. http://dx.doi.org/10.54222/afrigist/jgst/v1i1.6.

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Soil salinity is believed to be mainly responsible for low land use as well as agricultural productivity in coastal regions of the world. The entire coastal area of Ondo State is affected by coastal flooding which causes saltwater to inundate the top and impregnates them with soluble salts, thereby rendering the soils and subsoils water saline. This study applied a Geo-information technique not only to identify and analyze floodable areas but also to access the salinity of soil and vegetation changes for a period of twenty-six years (26yrs). A random sampling method was used for soil samples.

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11

Udeh, F. U., V. C. Udeh, and P. Chukwudi. "Serum biochemistry profile and liver function indices of broiler chickens served dietary inclusion of probiotics (Saccharomyces cerevisiae) and enzyme." Nigerian Journal of Animal Production 47, no. 6 (2021): 120–28. http://dx.doi.org/10.51791/njap.v47i6.2917.

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As the use of antibiotics as growth promoters have been banned in different countries, researchers have been working hard to find alternatives to antibiotics, and also come up with other substances that can promote growth, health and productivity in broiler chickens. The study was conducted to evaluate the serum biochemistry of broiler chickens served dietary inclusion of probiotics (Saccharomyces cereviasae) and enzyme. One hundred and twenty, one day-old broiler chicks Ross strain were used for the study. The birds were randomly allotted to four dietary treatments. Each treatment contained 3

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12

Blot, Frédérique. "Le Plan Hydrologique National : continuité d'une politique de l'eau pour l'Espagne." Sud-Ouest européen 16, no. 1 (2003): 131–44. http://dx.doi.org/10.3406/rgpso.2003.2848.

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The national hydrologic plan, continuity of the spanish water policies. Regarding sustainable development, in 2001 the Spanish government passed a bill for the National Hydrologie Plan. It was declared in compliance with the new water policies based on an « integrated management » and in relevance with a solidarity expressed in great water transfers between watersheds. The study of the relationship between society and water in the Segura's river basin, beneficiary of water transfers from the Tage river since 1978, shows that the NHP is not integrated in a brand new water policy. It points out

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13

Adeleke, R. A., C. B. I. Alawa, and S. M. Otaru. "Performance of Yankasa Weaner Rams Fed Roughage and Concentrate Supplement at Different Sequences and Intervals." Nigerian Journal of Animal Production 49, no. 4 (2023): 114–32. http://dx.doi.org/10.51791/njap.v49i4.3709.

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The production and productivity of small ruminant in humid West Africa is being limited by feed constraints, which are largely due to non-strategic utilization and combination of available feed resources to develop an efficient production feeding system, rather than absolute non availability. Farmers under semi-intensive system commonly offer feed supplements to their animals in the morning before grazing fibrous grasses all day. However, results of rumen degradability studies suggested that this system should be the opposite. This study was designed to investigate the effect of changing the s

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14

Maltais, Marie-Josée, and Warwick F. Vincent. "Periphyton community structure and dynamics in a subarctic lake." Canadian Journal of Botany 75, no. 9 (1997): 1556–69. http://dx.doi.org/10.1139/b97-868.

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Periphyton species composition was analysed at 20 stations around an island in a large (1239 km2) oligotrophic lake in subarctic Quebec (Lac à l'Eau Claire; latitude 56°10′N, longitude 74°30′W) to describe the mature communities colonizing the upper littoral region and to evaluate periphyton abundance and distribution relative to the physical environment. Four major communities could be clearly distinguished in the field by their macroscopic features, specifically colour (black, brown, and green) and growth form (filamentous or encrusted), as well as by their standing stock (cover and areal Ch

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15

Esiegwu, A. C. "Growth performance, haematological and serum biochemical indices of finisher broiler chickens offered nutritional supplement of fluted pumpkin (Telfairia occidentalis) leaves extract." Nigerian Journal of Animal Production 48, no. 5 (2021): 245–56. http://dx.doi.org/10.51791/njap.v48i5.3208.

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It is obvious that farmers cannot raise chicken without supplementary nutrients in the form of vitamins, minerals and amino acids provided either as anti-stress, immune booster or for growth and high productivity. The high cost of these conventional supplementary nutrients is becoming very alarming leading to high cost of production and consequently high cost of poultry products. Whereas, leaves of most plants in our agroecological zone contain these nutrients and can be obtained at no cost, it is necessary to utilize them for similar purposes to reduce cost and enhance the wellbeing of the an

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16

COULIBALY, Béjamé, Diakalia SOGODOGO, Moussa KANTE, and Amadou DIAKITE. "Effet des techniques de récupération de l'eau et des options de gestion des nutriments sur le rendement du mil perlé dans la zone sahélienne du Mali." Notes de l'Enseignant-Chercheur 4, no. 2 (2024): 157–74. https://doi.org/10.71140/necus.42009.

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Low natural soil fertility and inappropriate water and nutrient management practices are the main obstacles to millet productivity in the Sahelian zone of Mali. To increase millet productivity in Mali, this research was conducted at the Cinzana Agricultural Research Station during the 2013 and 2014 rainy seasons. The objectives of this study were to determine the effects of water harvesting techniques and nutrient management options on: (i) pearl millet yield and (ii) harvest index. The soil water harvesting techniques evaluated were zaï, partitioned ridge, and conventional tillage (control).

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17

Morin, Guy, Tonino-Joseph Nzakimuena, and Wanda Sochanski. "Prévision des températures de l'eau en rivières à l'aide d'un modèle conceptuel : le cas de la rivière Moisie." Canadian Journal of Civil Engineering 21, no. 1 (1994): 63–75. http://dx.doi.org/10.1139/l94-006.

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Hydro-Québec is projecting to increase the hydroelectric production capacity of the St. Marguerite River by diversion of the tributaries Pékans and Carheil rivers of the Moisie River, the most productive salmon river of the whole Quebec. Along with substantial changes in hydrological regimes, this hydroelectric development is most likely to affect some physical environment factors such as the water temperature, which is of prime importance for the biotope and, in particular, for the salmon productivity. The objective of the present study is to simulate, over a long period of time, the river wa

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18

Ogunjobi, F. V., M. A. Adeyemi, and E. O. Akinfala. "Evaluation of prebiotic activity of conventional fibre feedstuffs in the diets of pigs." Nigerian Journal of Animal Production 48, no. 1 (2021): 76–90. http://dx.doi.org/10.51791/njap.v48i1.2901.

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Over the years, significant research efforts have been made to improve livestock welfare and productivity. In part, this has been achieved through the use of in-feed antibiotics to enhance production and maintain animal health. More recently, the risks of residual effects, cross- resistance and development of antibacterial resistant strains especially on animal and final consumers of animal products provided justification for prohibition, hence the continuous search for suitable and cost-effective alternatives. This study evaluated the prebiotic activity of four fibre feedstuffs in diets of pi

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