Daouda Ngom

Cheikh Anta Diop University, Dakar | UCAD · Plant Biology

Citation: Diatta, O.; N'goran, A.A.-J.; Fassinou, C.; Salgado, P.; Ndiaye, O.; Diatta, S.; Ngom, D.; Tagesson, T.; Taugourdeau, S. Estimating Herbaceous Aboveground Biomass Using an Indirect Method Based on the Herbaceous Layer Characteristics. Abstract: Background: In the Sahel, one of the largest semi-arid areas in the world, pastoral livestock i...

Dalbergia melanoxylon Guill. & Perr. is a highly valued species in the Ferlo region, and its wood is used for various purposes by local populations, including firewood, service wood, and timber. This multifunctionality has weakened its populations, and it has been identified as threatened in previous research. The aim of this study was to investiga...

Le climat et la fauche influencent la production fourragère au Sahel. Cependant, l’effet combiné de ces paramètres reste à évaluer. Cette étude vise à évaluer l’effet conjoint de la pluviométrie et des pratiques de fauche sur la quantité et la qualité des fourrages. Des échantillons de phytomasse ont été prélevés au cours et à la fin de la saison d...

Soil salinization has become a major global ecosystem sustainability issue. In Senegal, promising ecosystem restoration of salt-affected lands has been reached by the implementation of ecological engineering strategies based on beneficial associations between Casuarina species and salt-tolerant symbiotic microorganisms. However, the extent of impac...

Soil salinization has become a major global ecosystem sustainability issue. In Senegal, promising ecosystem restoration of salt-affected lands has been achieved by the implementation of ecological engineering strategies based on beneficial associations between Casuarina species and salt-tolerant symbiotic microorganisms. However, the extent of the...

The full text of this preprint has been withdrawn by the authors while they make corrections to the work. Therefore, the authors do not wish this work to be cited as a reference. Questions should be directed to the corresponding author.

Soil salinization has become a major global ecosystem sustainability issue. In Senegal, promising ecosystem restoration of salt-affected lands has been achieved by the implementation of ecological engineering strategies based on beneficial associations between Casuarina species and salt-tolerant symbiotic microorganisms. However, the extent of the...

Silvopastoral systems (SPSs) have been shown to improve ecosystem resilience and provide sustainable land management solutions in the Sahel. However, accurately estimating the contribution of Sahelian ecosystems to the overall greenhouse gas (GHG) balance is a challenge, in particular regarding the magnitude of carbon dioxide (CO2) and nitrous oxid...

Plant Sciences (J. Anim. Plant Sci.) ISSN 2071-7024 1 ABSTRACT This study aims to determine the influence of F. albida and E. guineensis on rice growth and productivity. In fact, the effect of these two woody species on the physiology and yield of upland rice was assessed. Thus, a total of 40 yield squares with 20 in each sampling distance (under a...

Agriculture contributes to climate changes through land use changes and greenhouse gas emissions. Models can provide crucial insights into the extent of this contribution; however, their effectiveness relies on proper evaluation within the application context. Moreover, crop models that can simulate greenhouse gas emissions have not been extensivel...

Monitoring regeneration in woody communities and understanding the drivers of its success is crucial for gaining insight into the long-term persistence of trees in African drylands, where they play key socio-ecological roles. While fire, grazing and water availability are key factors for regeneration in these ecosystems, seed arrival, germination a...

Understanding the root traits of tree species is of great importance for selection of trees in dry zone agroforestry systems. We investigated root growth of nine dryland tree species in West Africa and assessed the effect of drought stress on biomass allocation to root systems as function of soil depth. Seedlings were planted in 2m tubes inserted i...

This study aims to determine the influence of F. albida and E. guineensis on rice growth and productivity. In fact, the effect of these two woody species on the physiology and yield of upland rice was assessed. Thus, a total of 40 yield squares with 20 in each sampling distance (under and outside the canopy of trees) was installed to evaluate rice...

The judicious combination of crops and trees of interest remains one of the most convincing solutions to increase the yield of peanut production in rural areas while preserving the most important woody biodiversity. However, the impact of trees of interest on food crops needs to be determined. Therefore, this study was carried out to evaluate the e...

Submitted 05/12/2023, Published online on 31/01/2024 in the Journal of Animal and Plant Sciences (J. Anim. Plant Sci.) ISSN 2071-7024 1 RESUME Cette étude visait à tester l'efficacité agronomique du compost de karité (Casuarina equisetifolia L.) comme amendement organique sur l'aubergine africaine (Solanum aethiopicum L.) dans un sol sablonneux à K...

Le bassin arachidier sénégalais présente différents types de parcs agroforestiers. La présente étude vise à caractériser les ligneux de deux types de parcs suivant un gradient pluviométrique. 185 relevés de végétation de dimensions 50 m x 25 m, soit 1250 m2 ont été réalisés dont 104 à Kahi, et 81 à Mérina. Les résultats montrent une richesse spécif...

L’effet de la pâture sur l’évolution de la masse herbacée et sa digestibilité au cours de l’année a été étudié à Dahra, dans le Sahel sénégalais. Dans cette zone d’élevage la strate herbacée, base de l’alimentation du bétail, a une croissance brève pendant la saison des pluies. L’étude a été conduite pendant la saison des pluies et la saison sèche...

Objectif : Au Sénégal, la dégradation, la salinisation et l’infertilité des rizières deviennent de plus en plus alarmante. Cette situation est due à l’effet conjugué de l’utilisation excessive des engrais minéraux, au déboisement et aux dérèglements climatiques. Cette étude est une contribution à l’amélioration de la productivité du riz par l’intro...

Silvopastoral systems (SPSs) have been shown to improve ecosystem resilience and provide sustainable land management solutions in the Sahel. However, accurately estimating the contribution of Sahelian ecosystems to the overall greenhouse gas (GHG) balance is a challenge, in particular the magnitude of carbon dioxide (CO2) and nitrous oxide (N2O) em...

To assess the extent to which trees in a semi-arid silvopastoral system (SPS) can offset the greenhouse-gas (GHG) emissions of the system's livestock, this study used two process-based models (STEP-GENDEC-N 2 O and DynACof) to simulate 9 years of agricultural activity and resulting emissions in a SPS that has been operating in sahelian Senegal. STE...

This research aimed to assess the area of urban area located around Mbao Classified Forest (MCF). In one part, it aims to assess the anthropization level of the forest. We proceeded to the determination of changes observed in the ground occupation from 1990 to 2020. In another part, it determines the spatial fragmentation process. To conduct this r...

Trees play a key role in drylands. Monitoring woody communities regeneration and understanding the drivers of its success is crucial to apprehend their long-term persistence. While fire, grazing and water availability are key factors for regeneration in drylands, seeds arrival, germination and seedlings recruitment are still poorly studied in natur...

Citation: Diatta, O.; Ngom, D.; Ndiaye, O.; Diatta, S.; Taugourdeau, S. Structure and Phenology of Herbaceous Stratum in the Sahelian Rangelands of Senegal. Grasses 2023, 2, 98-111. https:// Abstract: This study describes the structure and phenology of Sahelian rangelands during the rainy season. It was undertaken on a grazed plot and a fenced plot...

RESUME L'espèce Carapa procera est une plante à usage multiples dont l'huile est très prisée par la population locale. Cette étude avait pour objectif de contribuer à une meilleure connaissance de la germination, la croissance et le développement de C. procera en condition de pépinière sur différents types de terreaux. Les semences de provenances d...

This study aims to evaluate the agronomic performance of microdose fertilization on sanio millet. Specifically, the effect of microdosing on growth and production parameters of sanio millet was tested. To do this, a complete randomized block trial was set up with four blocks, each with six treatments: control (T0); 2) farm practice (T1): 10 t. ha-1...

RESUME L'espèce Carapa procera est une plante à usage multiples dont l'huile est très prisée par la population locale. Cette étude avait pour objectif de contribuer à une meilleure connaissance de la germination, la croissance et le développement de C. procera en condition de pépinière sur différents types de terreaux. Les semences de provenances d...

In order to understand the ecophysiology of sub-Sahelian tree species and to optimize their use in agroforestry, studies on tree root distribution are essential. The aim of this study was to investigate the root distribution of three sub-Sahelian tree species, Adansonia digitata, Faidherbia albida and Borassus akeassii, in three sites along a preci...

Strengthening of feed security in the Sahel is urgently needed given the climate change and growing human population. A prerequisite to this is sustainable use of rangeland forage resources for livestock. Many studies have focused on the assessment of rangeland resources during the rainy season, while only a few have focused on the dry season which...

The study was carried out in the locality of Ngouye which is an agro-pastoral area located in the Karffine region in Senegal. The breeding that is practiced is of the extensive type on natural pastures. The study aims to know the nutritional aspects of woody fodder found in the area. During our ethnobotanical survey, we identified 28 woody species,...

Agronomic performance of fertilizer microdosing on sanio millet (Pennisetum glaucum (L.) R. Br) in Lower Casamance (Senegal) Subject description. In Senegal, sanio or late type millet (Pennisetum glaucum (L.) R. Br) is a cereal cultivated mainly in Casamance and in Eastern Senegal. It is highly valued by rural populations because of its organolepti...

The main source of feed of Sahelian livestock is the annual herbaceous layer of Sahelian rangeland. The annual grass has a quick growth during the rainy season. The growth stop when the grass is flowering because of the photoperiod. The study of phenology is a key factor for the understanding of herbaceous growth. The objective of our study was to...

L'objectif de restaurer 100 millions d'hectares d'ici 2030 au Sahel n'est pas seulement un défi technique - définir les meilleurs itinéraires techniques agro-écologiques et forestiers - face à des conditions climatiques extrêmes. C'est aussi l'enjeu de (ré)concilier dans l'espace et le temps les activités de restauration écologique avec celles huma...

Plants of the Casuarinaceae family are widely known for their ability to tolerate salt stress. Casuarinaceae are able to develop symbiotic association with arbuscular mycorrhizal fungi and with the soil bacteria Frankia. The aim of this study was to evaluate adaptation mechanisms of Casuarina to tolerate salt stress when interacting Rhizophagus fas...

This study analyses the perceptions of beneficiaries on market gardening and horticultural grafting technologies of Adansonia digitata L. (baobab). The study involved a representative sample of 106 individuals. The methodological approach adopted consisted of individual surveys, group interviews and statistical estimations. The Chi-square and Pears...

Au Sénégal, la Basse-Casamance est une zone où la recherche a du terrain à explorer en raison de la situation de conflit qui y prévaut depuis de nombreuses années. C'est l'une des principales zones de production des fruits de Detarium senegalense, qui sont très importants pour la consommation humaine et pour le gain derevenus. L’objectif de cette é...

In the middle and upper Casamance, the products of the baobab tree (Adansonia digitata L.) make an important contribution to the lives of the population. However, information on the status of baobab populations in this area is insufficient. The aim of this study is to characterise the baobab parks in this area from a biophysical point of view. To d...

Like other regions of Guinea Bissau, the economy of the Cacheu region is not very diversified and is dominated by cashew nut cultivation. As the country's leading production zone, with more than 30% of the national cashew nut production, the region has seen the disappearance of a large part of its natural ecosystems, especially the Elaeis guineensi...

RESUME L’objectif de cette étude est d’évaluer l’influence de la saison des pluies sur quelques paramètres de la phytomasse herbacée. L’étude s’est déroulée dans une zone de libre pâturage où les mesures de phytomasse sont faites tous les dix jours et les pluies journalières relevées durant toute la saison des pluies pendant onze ans. Le test de co...

La communauté rurale de Téssékéré est à 97 % peule avec comme principale activité l’élevage extensif. La transhumance est pratiquée dans cette zone sur de petites ou grandes distances en fonction de la disponibilité du fourrage. Les enquêtes réalisées auprès des éleveurs de la localité ont permis d’identifier leurs pratiques pastorales et de recuei...

La biodiversité est un concept global qui sous-entend la variété et la variabilité du monde vivant à tous ses niveaux d’organisation, du gène à l’écosystème. Il apparait aujourd’hui que les écosystèmes de la terre ont été transformés de manière significative par les activités humaines, avec comme corollaire une menace permanente sur la diversité bi...

The objective of this study is to characterize and assess the risk of collapse of woody plant formations in the Fathala forest. In recent years, this forest has suffered a sharp reduction in its plant cover to the point of compromising the survival of populations of certain animal species such as the Red colobuses. The methods used are respectively...

In Lower Casamance, Pterocarpus erinaceus occupies a very important place in agroforestry parks. It is often grown in association with the most important cash crop of the area, groundnut (Arachis hypogea L.). Thus, the objective of this study is to contribute to a better understanding of the interactions between trees and groundnut cultivation in a...

Salinity is one of the main abiotic stresses limiting plant growth and development. However, the use of salt-tolerant plants combined with beneficial soil microorganisms could improve the effectiveness of biological methods for saline soil recovery. The aim of this study is to identify the Casuarina obesa/ Arbuscular Mycorrhizal fungal (AMF)/ Plant...

The find for the optimal slide of water to bring to the plot is important in order to limit the recharge of the water table close to the surface. The slide of water brought into the plots is estimated from the reading of the water height before and after each irrigation series on limnimetric scales. Monitoring of the water surface and the salinity...

Techniques based on proximal remote sensing combined with linear regression models allowed to estimate the biomass production and grain yield of rice during the crop cycle. With the availability of several photos, post-classification comparisons allowed to make a spatio-temporal monitoring of the canopy cover of the different stages of crop develop...

The general objective of this study is to describe the demographic structure and distribution according to topographic units of two woody species, Boscia senegalensis (Pers.) Lam. Ex Poir and Sclerocarya birrea (A. Rich) Hoscht in Widou Thiengoly (Ferlo) in northern Senegal. Stratified random sampling was used to carry out the study taking into con...

La communauté rurale de Téssékéré est à 97 % peule avec comme principale activité l’élevage extensif. La transhumance est pratiquée dans cette zone sur de petites ou grandes distances en fonction de la disponibilité du fourrage. Les enquêtes réalisées auprès des éleveurs de la localité ont permis d’identifier leurs pratiques pastorales et de recuei...

The general objective of this study is to describe the demographic structure and distribution according to topographic units of two woody species, Boscia senegalensis (Pers.) Lam. Ex Poir and Sclerocarya birrea (A. Rich) Hoscht in Widou Thiengoly (Ferlo) in northern Senegal. Stratified random sampling was used to carry out the study taking into con...

This work consisted of analysing the impact of protection on the Widou Thiengoly's grasslands structure. Data were collected from three selected sites by the quadrat point methodology, consisting of reading the herbaceous on a 10 m line. These sites were the 2013 defended plot (site A), the 2009 semi‐protected plot (site B) and the unprotected graz...

L'objectif de cette étude est de faire une caractérisation écologique d'un tronçon de la Grande Muraille Verte (GMV) au Sénégal. Trois sites ont été choisis suivant un transect pluviométrique croissant Nord-Ouest/Sud-Est (Koyli Alpha, Labgar et Ranérou). Le plan d'échantillonnage intègre les parcelles de reboisement dont l'environnement a été carac...

In Lower Casamance, farmers deliberately keep certain woody species in their fields to increase their crop yields and generate additional income. The objective of this study is to contribute to a better understanding of the state of agroforestry parks in Lower Casamance. To achieve this objective, vegetation surveys were carried out. Thus, a square...

L’étude a été réalisée dans les régions de Kolda et de Sédhiou, en Haute et Moyenne Casamance, dans de jeunes plantations de baobabs (Adansonia digitata L.) installées en 2014 pour raccourcir le cycle de production afin de réduire la pression exercée sur les populations adultes de baobabs, de plus en plus menacées. L’objectif était d’évaluer l’infl...

Cashew nuts are one of the main cash crops that compete strongly with groundnuts and cotton in Senegal. However, there is no clear scientific evidence to confirm or refute this argument, so this fact is not widely known. This raises a knowledge gap and justifies the need to analyze the nut quality. Raw cashew nut qualities were evaluated using the...

Soil salinization is one of the major causes of land degradation. In Senegal, this phenomenon continues to grow, making soils unsuitable for agriculture. To rehabilitate salty lands, one of the recommended strategies is the use of salt-tolerant plants. Among them, plants of Casuarinaceae family form a relationship with symbiotic microorganisms such...

Land salinization is a major constraint for the practice of agriculture in the world. Considering the extent of this phenomenon, the rehabilitation of ecosystems degraded by salinization has become a priority to guarantee food security in semi-arid environments. The mechanical and chemical approaches for rehabilitating salt-affected soils being exp...

L’agriculture occupe une place très importante dans l’arrondissement de Tendouck. Pour augmenter leurs rendements, les agriculteurs laissent délibérément dans leurs champs certaines espèces ligneuses. Cette étude a pour objectif général de contribuer à une meilleure connaissance des caractéristiques des parcs agroforestiers du département de Bignon...

Evaluer l’intensification du niébé dans les cultures de mil par une démarche de diagnostique agronomique des systèmes en association ou en culture pure.