Dynamique des usages des vallées péri-urbaines de Ngaoundéré

Tchotsoua, Michel; Boutrais, Jean; Bonvallot, Jacques

doi:10.4000/books.irdeditions.8606

Cited by 3 publications

(2 citation statements)

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“…The soil used to form the 2.5 kg pots for plant development was collected from the Marza market garden basin located 3 km south of the city of N'Gaoundéré [15] . In this basin, soil samples were collected at a depth of 0-20 cm to form pots and their characteristics are presented in Table 1.…”

Section: Soil Sampling Areamentioning

confidence: 99%

Assessment of the risks of using linuron-based formulations on the growth, health and nutritional quality of Three vegetables –Phaseolus vulgaris, Solanum nigrum and Daucus carota- regularly grown in the market-gardening areas of Ngaoundéré-Cameroon

2023

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The objective of this study was to evaluate the effect of the treatment of cultivated soils with linuron-based formulations on the growth parameters, on the nutritional and health quality of green bean, black nightshade and carrot fruits regularly developing in market gardening areas of Ngaoundéré-Cameroon. The methodology consisted in developing these plants regularly cultivated on contaminated soil pots at three concentrations of linuron of 0.93mg/L; 1.87mg/L; 3.74g/L and on uncontaminated potted soils. During their growth, the sizes and the fresh biomasses of the seedlings were evaluated. Then, the linuron residues were extracted from the samples of the consumable parts by the QUErchercs method and analyzed by HPLC-UV. With regard to nutritional quality, soil contamination by linuron-based formulations led to a significant decrease in vitamin C, polyphenol and antioxidant content in the edible parts of fruits and vegetables Assessment…..

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Section: Soil Sampling Areamentioning

confidence: 99%

Assessment of the risks of using linuron-based formulations on the growth, health and nutritional quality of Three vegetables –Phaseolus vulgaris, Solanum nigrum and Daucus carota- regularly grown in the market-gardening areas of Ngaoundéré-Cameroon

2023

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“…In several tropical cities, the destruction of soil structure by the loss of vegetation due to the mismanagement of green spaces causes important damage (M. Tchotsoua 1994). For instance, in Yaoundé and Ngaoundéré in Cameroon, the ferralitic soils (Tchotsoua 1994; Tchotsoua and Bonvallot 2001), and in Ivory Coast, tropical soils (Rakotoarimanana et al 2008) of cities are subject to erosion because of the mismanagement of green spaces.…”

Section: Introductionmentioning

confidence: 99%

Effect of Vegetation Degradation on the Soil Quality of Green Spaces in a Tropical Megacity (Lubumbashi, Dr Congo): Potential Implications for Ecosystem Services

Mashagiro,

Mujinya,

COLINET

et al. 2023

Preprint

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Effect of vegetation degradation on the soil quality of green spaces in a tropical megacity (Lubumbashi, DR Congo): potential implications for ecosystem services

Mashagiro,

Mujinya,

Colinet

et al. 2023

Preprint

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Urban soils are degraded by a range of human pressures, including vegetation degradation, leading to modifications of physical and chemical characteristics, and affecting important ecosystem services. We assessed the impact of vegetation degradation in six urban green spaces (bare soils versus vegetated soils) on the physical (texture, soil bulk density and structure) and chemical (pH, CEC, OC, N, P, K, Cu and Mn) qualities of soils in a tropical megacity (Lubumbashi, DR Congo). Vegetated soils presented better physical and chemical qualities than bare soils. Vegetated soils were characterized by a high clay and silt content and a good consistency (structure), while bare soils were characterized by a high sand content and high bulk density. Vegetated soils were characterized by higher pH, OC, N, C/N, OM, CEC, P, and K. There was no significant difference in Mn or Cu between bare and vegetated soils. Cu was highly variable between sites (from 99±61 mg.kg-1 in VS-CHL to 8559±151 mg.kg-1 in BS-ZOO). Our results demonstrate that the destruction of vegetation, leading to bare soil, negatively affects soil properties and may interfere with ecosystem services provided by urban soils in tropical climates.

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Dynamique des usages des vallées péri-urbaines de Ngaoundéré

Cited by 3 publications

References 0 publications

Assessment of the risks of using linuron-based formulations on the growth, health and nutritional quality of Three vegetables –Phaseolus vulgaris, Solanum nigrum and Daucus carota- regularly grown in the market-gardening areas of Ngaoundéré-Cameroon

Assessment of the risks of using linuron-based formulations on the growth, health and nutritional quality of Three vegetables –Phaseolus vulgaris, Solanum nigrum and Daucus carota- regularly grown in the market-gardening areas of Ngaoundéré-Cameroon

Effect of Vegetation Degradation on the Soil Quality of Green Spaces in a Tropical Megacity (Lubumbashi, Dr Congo): Potential Implications for Ecosystem Services

Effect of vegetation degradation on the soil quality of green spaces in a tropical megacity (Lubumbashi, DR Congo): potential implications for ecosystem services

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