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Niamey, Niger

Abdou Moumouni University -- formerly University of Niamey from 1974-1994—is the only public university in Niger and is thus directly controlled by the Ministry of Education. Located on the right bank of the Niger River in Niamey, its students and faculty have historically been involved in protest movements in the capital. Wikipedia.

Hamidou F.,International Crops Research Institute for the Semi Arid Tropics ICRISAT | Hamidou F.,University Abdou Moumouni | Halilou O.,International Crops Research Institute for the Semi Arid Tropics ICRISAT | Vadez V.,Indian International Crops Research Institute for the Semi Arid Tropics
Journal of Agronomy and Crop Science | Year: 2013

In semi-arid regions, particularly in the Sahel, water and high-temperature stress are serious constraints for groundnut production. Understanding of combined effects of heat and drought on physiological traits, yield and its attributes is of special significance for improving groundnut productivity. Two hundred and sixty-eight groundnut genotypes were evaluated in four trials under both intermittent drought and fully irrigated conditions, two of the trial being exposed to moderate temperature, while the two other trials were exposed to high temperature. The objectives were to analyse the component of the genetic variance and their interactions with water treatment, year and environment (temperature) for agronomic characteristics, to select genotypes with high pod yield under hot- and moderate-temperature conditions, or both, and to identify traits conferring heat and/or drought tolerance. Strong effects of water treatment (Trt), genotype (G) and genotype-by-treatment (GxTrt) interaction were observed for pod yield (Py), haulm yield (Hy) and harvest index (HI). The pod yield decrease caused by drought stress was 72% at high temperature and 55% at moderate temperature. Pod yield under well-watered (WW) conditions did not decrease under high-temperature conditions. Haulm yield decrease caused by water stress (WS) was 34% at high temperature and 42% under moderate temperature. Haulm yield tended to increase under high temperature, especially in one season. A significant year effect and genotype-by-environment interaction (GxE) effect were also observed for the three traits under WW and WS treatments. The GGE biplots confirmed these large interactions and indicated that high yielding genotypes under moderate temperature were different to those at high temperature. However, several genotypes with relatively high yield across years and temperature environments could be identified under both WW and WS conditions. Correlation analysis between pod weight and traits measured during plant growth showed that the partition rate, that is, the proportion of dry matter partitioned into pods, was contributing in heat and drought tolerance and could be a reliable selection criterion for groundnut breeding programme. Groundnut sensitivity to high-temperature stress was in part related to the sensitivity of reproduction. © 2012 Blackwell Verlag GmbH. Source

Larwanou M.,International Center for Research in Agroforestry | Saadou M.,University Abdou Moumouni
Journal of Arid Environments | Year: 2011

A study was conducted in 15 village territories of 3 regions in Niger. Among these sites, 4 were control and 11 had interventions comprising of farmer-managed tree natural regeneration (FMNR), water harvesting techniques (WHT) and windbreaks. The objective of the study was to determine the state of tree vegetation in terms of species diversity and harvestable volume and evaluate the environmental trend in the sites. An inventory of the vegetation was carried out during the rainy season using radial transects from the village centre, outwards, in addition to surveys with local communities.The results showed that tree diversity is enhanced in sites with interventions, and soil rehabilitation techniques and farmer-managed tree natural regeneration favor the rehabilitation and development of trees. The number of resprouts/seedlings varied with site, soil type and intervention. The number of harvestable trees depended on factors like caring, monitoring of cutting, types of intervention and ecological zone.Harvestable volume is a function of high regeneration rate, number of harvestable individual trees and site. Vegetation is improving in all the sites and local communities using tree products for their various needs. This study contributed to setting up a reference database for these sites. © 2010 Elsevier Ltd. Source

Hamani Daouda M.,Federal University of Espirito Santo | Hamani Daouda M.,University Abdou Moumouni | Rodrigues M.E.,Federal University of Espirito Santo | Houndjo M.J.S.,Federal University of Espirito Santo | Houndjo M.J.S.,Institute Of Mathematiques Et Of Science Physiques Imsp
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2012

We consider f(T) gravity for a Weitzenbock's spherically symmetric and static spacetime, where the metric is projected in the tangent space to the manifold, for a set of non-diagonal tetrads. The matter content is coupled through the energy-momentum tensor of an anisotropic fluid, generating various classes of new black hole and wormhole solutions. One of these classes is that of cold black holes. We also perform the reconstruction scheme of the algebraic function f(T) for two cases where the radial pressure is proportional to f(T) and its first derivative. © 2012 Elsevier B.V. Source

Harouna M.,University Abdou Moumouni | Philp R.P.,University of Oklahoma
Journal of Petroleum Geology | Year: 2012

Potential source rocks from wells in the Termit Basin, eastern Republic of Niger, have been analysed using standard organic geochemical techniques. Samples included organic-rich shales of Oligocene, Eocene, Paleocene, Maastrichtian, Campanian and Santonian ages. TOC contents of up to 20.26%, Rock Eval S 2 values of up to 55.35 mg HC/g rock and HI values of up to 562 mg HC/g TOC suggest that most of the samples analysed have significant oil-generating potential. Kerogen is predominantly Types II, III and II-III. Biomarker distributions were determined for selected samples. Gas chromatograms are characterized by a predominance of C 17- C 21 and C 27- C 29 n-alkanes. Hopane distributions are characterized by 22S/(22S+22R) ratios for C 32 homohopanes ranging from 0.31 to 0.59. Gammacerane was present in Maastrichtian-Campanian and Santonian samples. Sterane distributions are dominated by C 29 steranes which are higher than C 27 and C 28 homologues. Biomarker characteristics were combined with other geochemical parameters to interpret the oil-generating potential of the samples, their probable depositional environments and their thermal maturity. Results indicate that the samples were in general deposited in marine to lacustrine environments and contain varying amounts of higher plant or bacterial organic matter. Thermal maturity varies from immature to the main oil generation phase. The results of this study will contribute to an improved understanding of the origin of the hydrocarbons which have been discovered in Niger, Chad and other rift basins in the Central African Rift System. © 2012 The Authors. Journal of Petroleum Geology © 2012 Scientific Press Ltd. Source

Mohamed A.B.,University Abdou Moumouni
Regional Environmental Change | Year: 2011

Analyses of Sahel regional and country-specific rainfall and temperature time series derived from a fixed subset of stations show the well-documented large-scale decreasing trend in rainfall that occurred between 1970 and 2000 and also, an increasing trend in summertime maximum and wintertime minimum temperatures. The evolution of summertime mean maximum temperature is almost opposite to that of rainfall, and a significant correlation is observed between the evolution of this quantity and millet yields, in comparison with correlation with summertime rainfall. It appears that quantifying future vulnerability of the Sahel zone to climate change is rather difficult because climate models have not in general shown yet a satisfactory reproduction of the observed climate variability of this area. © 2010 Springer-Verlag. Source

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