ABSTRACT
Maize is increasingly becoming important in Niger for use as food and feed. Production is however, faced with several abiotic and biotic constraints. Researchers have developed early-maturing maize varieties that are tolerant to drought, the parasitic weed Striga hermonthica and diseases that fit into the short growing production environment. The evaluation and deployment of these varieties would, however, involve costly and time-consuming field trials across the maize production zones of the country. The CERES-Maize model was applied to assess the performance of two early-maturing maize varieties under varying planting windows and nitrogen application in three agroecological zones of the country. The model was calibrated with datasets collected from field trials conducted under optimal conditions (supplementary irrigation and full nutrient supply) at three locations in northern Nigeria. The model was validated with independent data set obtained from field trials conducted in 2020 and 2021 at 4 locations in the Republic of Niger under rainfed conditions. For each variety the treatments were five nitrogen (N) rates (0, 30, 60, 90 and 120 kg ha-1). The results from model calibration and validation revealed that the model accurately reproduced the observed value for days to flowering, physiological maturity, aboveground dry biomass and grain yield with low nRMSE (0.4-12.7%) and high d-index (0.70-0.99) for both varieties. The long-term simulation results (1985-2020) showed that the maize performance was dependent on location, planting window and nitrogen rates. The variety 2014 TZE-Y yielded higher than Brico in all locations for all treatments because it takes longer to mature and accumulate higher dry matter and have higher number of kernels. Simulated yields were generally higher in the Sudan savanna agroecological zone than in the other zones because of higher rainfall and higher clay content of the soil in this zone. The response to N application was influenced by planting window in each agroecological zone. With the exception of two sites, grain yield declined with planting beyond July 14 (PW3) and response to N was not significant beyond this date in the Sudan savanna agroecological zone. Grain yield declined with planting beyond July 7 in the Sahel and Sudan Sahel agroecological zones. There was no further response to N beyond 30 and 60 kg N ha-1 when planting is delayed beyond July 7 in the Sahel and Sahel-Sudan agroecological zones, respectively.
ABSTRACT
L'impact dévastateur des accidents vasculaires cérébraux sur la qualité de vie des sujets a motivé à conduire cette étude. Le but est d'identifie lesdifférences entre les genres dans la perspective d'optimiser la prise en charge surtout sur facteurs se révélant péjoratives individuellement pour chaque groupe MéthodesIl s'agit d'une étude prospective analytique d'une durée de neuf (9) mois allant de juillet 2019 à mars 2020 aux urgences médicales de l'Hôpital National de Niamey. Etait éligible, tout patient consentant ayant développé un AVC avec une lésion objectivée au scanner cérébral.Résultats : L'étude avait inclus au total 100 sujets dont 59 ayant présenté un infarctus cérébral et les 41 autres un AVC hémorragique. Le sex-ratio était de 1. Au niveau de l'âge il n'y a pas eu de différence entre les genres (p=0,547). Les non-instruits ont été retrouvés plus chez les femmes (p=0,001). Des pressions artérielles systoliques (p=0,014) et diastoliques p=0,014) et diastoliques (p=0,02) au stade 3 de l'OMS ont concernées plus les hommes que les femmes. Les femmes ont été les plus intéressées par l'infarctus cérébral et inversement les hommes par l'AVC hémorragique (p=0,025). Le genre n'a pas eu de lien statistique avec le décès (pË0,05).Conclusion : L'étude a seulement objectivé une rela-tion entre le genre, le niveau d'instruction, la pression artérielle et le type d'accident vasculaire
Subject(s)
Gender Identity , Niger , Stroke, LacunarSubject(s)
Boutonneuse Fever/complications , Eye Infections, Bacterial/complications , Macula Lutea/pathology , Retinal Degeneration/etiology , Adult , Atrophy , Boutonneuse Fever/diagnosis , Eye Infections, Bacterial/diagnosis , Female , Fluorescein Angiography , Fundus Oculi , Humans , Retinal Degeneration/diagnosis , Tomography, Optical CoherenceSubject(s)
Eye Abnormalities/diagnosis , Retinal Vessels/abnormalities , Traction , Vascular Malformations/diagnosis , Vitreous Body/pathology , Adult , Eye Abnormalities/pathology , Female , Fundus Oculi , Humans , Incidental Findings , Morocco , Retinal Vessels/pathology , Traction/adverse effects , Vascular Malformations/pathology , Vitreous Body/diagnostic imagingABSTRACT
The aim of this study was to describe common practices and representations concerning pregnancy, childbirth and postnatal care in Niger. We interviewed everyone involved in antenatal care and delivery in 12 villages. We describe here common practices for diagnosis of pregnancy, antenatal care, normal and problem deliveries and postnatal care. Our findings raise questions about maternal health policies in developing countries, which do not always fully take into account the requirements of the population.
