Effet de l’arbre &lt;i&gt;Acacia senegal&lt;/i&gt; sur la fertilité des sols de gommeraies au Niger

Abdou, MM; Mayaki, Zoubeirou Alzouma; Kadri, Ahmed; Ambouta, Jmk; Lamso, Nomaou Dan

doi:10.4314/ijbcs.v7i6.13

Cited by 9 publications

(13 citation statements)

References 15 publications

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“…While the importance of A. senegal in rural economy (Guinko et al, 1996) and soil stabilization and fertility (Abdou et al, 2013;Wickens et al, 1995) is undeniable, the importance of genetic diversity of natural populations in Niger is still very poorly studied. The knowledge of the partitioning of genetic variation within species is a prerequisite for defining strategies for conservation, management and sustainable use of the species' resources.…”

Section: Introductionmentioning

confidence: 99%

Exploring genetic diversity and structure of Acacia senegal (L.) Willd. to improve its conservation in Niger

Djibo¹,

Assoumane²,

Manssour³

et al. 2017

Afr. J. Biotechnol.

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The genetic diversity of African forest resources is poorly documented while it can be the basis for adapting these resources to climatic variations. This study aimed to characterize the genetic diversity of the Acacia senegal (L.) Willd in its natural range in Niger. 252 individuals from 10 populations of the species, across three gum basins were analyzed with 9 nuclear microsatellite markers. Genetic diversity indexes are high in all the populations studied: number of allele (Na) varies from 4.00 to 5.44; allele richness (R) varies from 3.42 to 4.49; observed heterozygosity (Ho) and expected heterozygosity (He) range from 0.44 to 0.56 and from 0.46 to 0.63, respectively. The values of differentiation index (Fst) per pair of population range from 0.0057 to 0.110 and 20% of these values are not significant indicating a low differentiation between populations. In addition, molecular variance analysis shows that 93% of total variation is within populations. Through Bayesian model, a structure of population into three groups is observed. These results could form the basis for building sustainable management and conservation strategies of genetic resources of A. senegal in Niger.

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Section: Introductionmentioning

confidence: 99%

Exploring genetic diversity and structure of Acacia senegal (L.) Willd. to improve its conservation in Niger

Djibo¹,

Assoumane²,

Manssour³

et al. 2017

Afr. J. Biotechnol.

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“…Ce qui conforme aux résultats de Abdoulkadri et al, (2019) et Manssour et al, (2014), pour qui la croissance plus importante sous les arbres résulterait de l'effet de l'arbre. Aussi, cette croissance plus élevée au niveau de T3 résulterait de l'apport de la RNA sur le sol car selon Abdou et al, (2013), les teneurs en éléments nutritifs du sol sont plus élevées sous les arbres. En outre, les racines mortes des arbres se décomposent et constituent tout naturellement une part importante de la matière organique autour de ces ligneux.…”

Section: Discussionunclassified

Impact De La Combinaison Regeneration Naturelle Assistee (Rna) Et Engrais En Microdose Sur La Productivite Du Mil (Pennisetum Glaucum (L.) R. Br.) Au Niger

Manssour¹,

Abdou²,

Haboubacar³

et al. 2020

ESJ

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This study was conducted at the Dineye and Kassamma sites in the Zinder (Niger). Its objective is to determine the effect of the combination of FMNR and microdose fertilizers on millet productivity. The experimental device used is a Fisher block with ten (10) repetitions. The factor studied is soil fertilization with four (4) treatments (T): T1 consisting only of FMNR serving as a control; T2 which is a combination of FMNR and manure in microdose; T3 which is a combination of FMNR, manure and NPK in microdose and T4 which is a combination of FMNR and NPK in microdose. The growth parameters like height of the plant and the number of leaves were monitored per decade until maturity. At harvest, the yield components, namely: dry biomass, the weight of the ears and grains were evaluated. The results showed that height of the plants and the number of leaves were higher with T3. As for yields of stems, ears and grains, they were significantly higher in T3, followed by T4, T2 and T1 respectively. These results show that the combination of FMNR, organic manure and mineral manure in microdose made it possible to increase the yield of millet. This combination could therefore be popularized among agricultural producers in areas practicing FMNR to improve the productivity of their crops.

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“…Research conducted in different localities on the use of woody species in the fields shows that Faidherbia albida and Hyphaene thebaica (Moussa, 1996;Dan Lamso et al 2015), Borassus aethiopum (Kadadé, 1999) and Acacia senegal (Abdou et al, 2013) respond to farmers' concerns to improve soil fertility and agricultural production. To better understand the interactions between shrubs and soils, Dan Lamso et al (2015) conducted research on the effect of Guiera senegalensis clumps on soil fertility in the village lands of Maradi.…”

Section: Agricultural Yields and Food Securitymentioning

confidence: 99%

Farmer managed natural regeneration in Niger: the state of knowledge

Abasse¹,

Massaoudou²,

Ribiou³

et al. 2023

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Faced with environmental degradation and strong land pressure, farmers in south-central Niger have intensified their agricultural production systems. Since the 1980s, farmers in the regions of Zinder, Maradi and Tahoua have increased the number of trees and shrubs on their fields, creating new agroforestry parklands over about 5 million hectares. This regreening is not based on tree planting, however, but on farmers protecting and managing natural regeneration of woody species on their crop lands. This has been well documented over the years, but until now, there has not been a thorough review of all of the published peer-referenced as well as grey literature. This report presents the first comprehensive state of knowledge of farmer managed natural regeneration (FMNR) in Niger. Studies show the scale and dynamics of FMNR as well as its multiple impacts. It has increased crop yields (+31 kg/ha to +350 kg/ha), and that supports family food security even in drought years. FMNR has increased the income of all social categories, even the most vulnerable women, men and youth, through the sale of fuelwood and service wood. The pruning of trees in fields has also reduced the distances travelled by women to collect fuelwood. FMNR increased the availability of fodder from trees to farmers and agropastoralists, with households practising FMNR harvesting 30-45 kg of fodder per day. Economists have not calculated all the multiple impacts in monetary terms, but studies on the costs and benefits all indicate that it is economically rational for farmers to invest their labour in FMNR. The costs are modest (no equipment and little labour), and the benefits are substantial, also helping smallholder farmers adapt to climate change, while sequestering millions of tonnes carbon. As a consequence of FMNR, tree cover has been sustained without external incentives (e.g. food or cash-for-work), an outcome that distinguishes this farmer-driven practice from large-scale tree planting projects where farmers’ stewardship ended when the external incentives ended. Agroforestry landscapes are thus being created at scale due to decisions made by hundreds of thousands of individual farmers. It is hoped that information in this report that shows the clear benefits of FMNR in Niger will encourage policy makers in Africa’s drylands to invest in the promotion of FMNR. This foundational practice must form the backbone of landscape wide initiatives if the ambitious targets of the Great Green Wall, AFR100 and similar ambitious restoration initiatives are to be achieved. FMNR is a low cost sustainable land use management practice with a considerable potential for scaling, which can and must be adopted and scaled immediately.

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Effet de l’arbre <i>Acacia senegal</i> sur la fertilité des sols de gommeraies au Niger

Abstract: RESUME Six gommeraies des trois bassins gommiers du

Cited by 9 publications

References 15 publications

Exploring genetic diversity and structure of Acacia senegal (L.) Willd. to improve its conservation in Niger

Exploring genetic diversity and structure of Acacia senegal (L.) Willd. to improve its conservation in Niger

Impact De La Combinaison Regeneration Naturelle Assistee (Rna) Et Engrais En Microdose Sur La Productivite Du Mil (Pennisetum Glaucum (L.) R. Br.) Au Niger

Farmer managed natural regeneration in Niger: the state of knowledge

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