The influence of land-use on tropical soil chemical characteristics with emphasis on aluminium

Tejnecký, Václav; Křížová, Petra; Penížek, Vít; Maňourová, Anna; Sillam‐Dussès, David; Šobotník, Jan; Akama, Pierre D.; Lojka, Bohdan; Němeček, Karel; Borůvka, Luboš; Drábek, Ondřej

doi:10.1016/j.jinorgbio.2019.110962

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…La forte densité des arbres dans les milieux forestiers et terres cultivées (agroforestiers) entraine un important dépôt de litières végétales, contrairement aux sols des bâtis et les sols de cultures villageoises où le labour intensif du sol a détruit les agrégats (Wei et al, 2014) et favorise le lessivage des nutriments (Young, 1989 ;Nair, Buresh, Mugendi et al, 1999 ;Sharma et al, 2009). De ce fait, les zones de bâtis et les cultures villageoises ont des pH légèrement supérieurs à ceux des milieux forestiers et terres cultivées (Tellen et Yerima Bernard, 2018 ;Tejnecký et al, 2020 ;Terefe et Kim, 2020) à cause des fortes activités sur brûlis qui ont été réalisés après déforestation afin d'aménager les zones sollicitées. Ce type d'activité, dans les régions tropicales, augmente le pH après le brûlage (Thomaz et al, 2014 ;Filho et al, 2015;Ngo-Mbogba et al, 2015;Tejnecký et al, 2020).…”

Section: Discussionunclassified

“…De ce fait, les zones de bâtis et les cultures villageoises ont des pH légèrement supérieurs à ceux des milieux forestiers et terres cultivées (Tellen et Yerima Bernard, 2018 ;Tejnecký et al, 2020 ;Terefe et Kim, 2020) à cause des fortes activités sur brûlis qui ont été réalisés après déforestation afin d'aménager les zones sollicitées. Ce type d'activité, dans les régions tropicales, augmente le pH après le brûlage (Thomaz et al, 2014 ;Filho et al, 2015;Ngo-Mbogba et al, 2015;Tejnecký et al, 2020). Nous pouvons donc constater que le type d'occupation du sol a un impact sur le pH des sols.…”

Section: Discussionunclassified

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Evaluation du carbone organique des sols de la province de l’Estuaire (NW, Gabon) selon le type d’occupation

Ona,

Endamane,

Obiang

et al. 2023

Int. J. Bio. Chem. Sci

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Le sol est la meilleure alternative aux gaz à effet de serre car, selon le GIEC, il constitue le plus important réservoir superficiel à carbone avec plus de 1500 à 2000 Gigatonnes de carbone captés par année. Pendant longtemps, l’évaluation du potentiel de stockage en carbone organique dans les sols du Gabon a été exclusivement orientée dans le milieu forestier. Cette étude vise à évaluer le potentiel en carbone organique des sols dans la province de l’Estuaire, selon 7 types d’occupations des sols, définit par l’Agence Gabonaise d’Etudes et Observations Spatiale (AGEOS). Nous avons comparé les sols sous terres cultivées (TC ; n=11), sous bâtis (BT ; n=12), sous cultures villageoises (CV ; n=8), sous savanes et végétations basses (SVB ; n=6), sous forêts inondées (FI ; n=9), sous forêts secondaires (FS ; n=12), à ceux sous forêts matures (FM ; n =14). Les sols ont été prélevés (n=864) sur une profondeur de 0 à 100 cm avec un pas régulier de 20 cm. Les résultats d’analyses ont montré des spécificités géographique et géologique dans les sols des sites échantillonnés. En effet, tous les sols sont acides (pH<5,01), et les sites proches du littoral (BT, SVB, FI et CV) sont fortement désaturés et remaniés, subissant une forte pluviométrie annuelle (3500 mm à 3000 mm), avec des densités apparentes les plus importantes, mais les teneurs en carbone organique totale (COT) les plus faibles. Tandis que les sites plus éloignés du littoral (FM, FS et TC) reposent sur un socle cristallin, subissent une pluviométrie moins importante (2500 mm à 3000 mm), possèdent des densités apparentes les plus faibles et les teneurs en COT les plus importantes. De plus, la texture argilo-limoneuse à argileuse des sols des sites FM, FS, et TC permet un stockage plus important en COT que la texture sableuse à sablo-limoneuse des sols des sites BT, SVB, FI et CV. English title: Evaluation of the organic carbon of the soils of the province of Estuaire (NW, Gabon) according to the type of occupation Soil is the best alternative to greenhouse gases because, according to the IPCC, it is the largest superficial carbon reservoir with more than 1500 to 2000 Gigatons of carbon captured per year (IPCC). For a long time, the evaluation of the organic carbon storage potential in the soils of Gabon was exclusively oriented in the forest environment. This study aims to assess the organic carbon potential of soils in the Estuary province, according to 7 types of land use, defined by the Gabonese Agency for Spatial Studies and Observations (AGEOS). We compared the soils under cultivated land (TC; n=11), under buildings (BT; n=12), under village crops (CV; n=8), under savannas and low vegetation (SVB; n=6), under flooded forests (FI; n=9), under secondary forests (FS; n=12), to those under mature forests (FM; n=14). The soils were sampled (n=864) over a depth of 0 to 100 cm with a regular step of 20 cm. The analysis results showed geographical and geological specificities in the soils of the sampled sites. Indeed, all the soils are acidic (pH<5.01), and the sites near the coast (BT, SVB, FI and CV) are highly desaturated and reworked, undergoing high annual rainfall (3500 mm to 3000 mm), with the highest apparent densities, but the lowest total organic carbon (TOC) contents. While the sites farther from the coast (FM, FS and TC) rest on a crystalline basement, experience less rainfall (2500 mm to 3000 mm), have the lowest apparent densities and the highest TOC contents. In addition, the clayey-loamy to clayey texture of the soils of the FM, FS, and TC sites allows greater TOC storage than the sandy to sandy-loamy texture of the soils of the BT, SVB, FI and CV sites.

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Section: Discussionunclassified

Evaluation du carbone organique des sols de la province de l’Estuaire (NW, Gabon) selon le type d’occupation

Ona,

Endamane,

Obiang

et al. 2023

Int. J. Bio. Chem. Sci

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“…Despite the reduction of TOC, soil acidity is ameliorated in CA and MC and these agricultural sites have a considerably higher amount of available nutrients and higher soil pH probably due to frequent burning for weed removal and additions of sudden ash inputs onto soils, which temporarily improve the plant growth, but over time lead to a dramatic reduction of soil organic matter and thus, to the loss of self‐regulating capacity of soils (Tejnecký et al, 2020). On the contrary, chop‐and‐mulch treatment or legume‐enriched crops represent wise alternatives to increase a reserve of organic matter and nutrients, including P and N (Comte et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The ecosystem recovery is possible if a local pool of species survives (Tables 2 and 5), and depends firstly on primary productivity and secondly on decomposers' activity represented mostly by termites in the tropics (Jouquet et al, 2011). The wood presence increases the SOM proportion through the termite actions, and the vegetation removal ultimately leads to a collapse of natural food webs due to low SOM content, gradual CEC decrease, depletion of nutrients, changes in pH and mobilization of Al (Tejnecký et al, 2020). On one hand, maize provides a low income to the farmers but covers an important share of family and live stock food on the other.…”

Section: Discussionmentioning

confidence: 99%

“…The tropical rainforests of Africa currently extend from Guinea in the west to Uganda in the east, covering more than four million km 2 (FAO 2001). The soils are highly weathered, often exhibiting high aluminum (Al) toxicity, low cation‐exchange capacity (CEC), base saturation and phosphorus (P) availability (Tejnecký et al, 2020), hence not considered suitable for agricultural use unless properly managed. The common agricultural processes lead to fast soil exhaustion, best exemplified as loss of soil total organic carbon (TOC) (Guimarães et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Effect of farming on the vegetation structure, soil properties and termite assemblages in the northern Congo Basin

et al. 2022

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The growing human population requires vast amounts of supplies that are satisfied by a large agricultural expansion leading to alarming deforestation of tropical forests.Agriculture in the large part now is unsustainable as tropical soils are relatively nutrient poor, the amount of organic matter decreases fast and the soil invertebrates and microorganisms vanish over time. From a socio-economic point of view, agroforestry is a sustainable alternative to slash-and-burn practices, but its impact on termites, major macroinvertebrates responsible for the organic matter turnover, is poorly understood. Furthermore, other vegetation layers besides tree canopy are rarely included in studies despite their strong effect on soil macrofauna. Thus, we investigated the impact of human activities in Southern Cameroon by analysing the biomass of termites, the soil properties, the vegetation structure at three different classes (trees, shrubs and herbs) and the amount of raw vegetal material along a land-use gradient of primary forest -secondary forest -cocoa agroforestry -maize cropland.Within each of the habitats, two independent areas of 1 ha each were laid out for samples collection. Our results show similar trends for all variables, with a reduction of organic carbon as well as available micronutrients, plant diversity and abundance and dead plant matter stocks along the land-use intensification. The same trend is shown by the abundance and biomass of termites, best exemplified by the absence of soil-feeding termites in the maize cropland. We thus recommend for support to nature-friendly agroforestry systems preserving a large share of the original soil invertebrates.

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Soil quality: an indicator of recovery in a nature reserve in the Colombian Andes

González,

Baquero-Echeverri,

Caicedo-García

et al. 2024

Agroforest Syst

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Soils provide essential ecosystem services for the existence of ecosystems and biodiversity. It is crucial to understand their quality through the evaluation of ecological processes. However, only some studies estimate the effectiveness of ecosystem restoration based on evaluating soil quality (SQ) indicators. This research evaluated the five most common land-use scenarios in Andean ecosystems within the Natural Reserve of the Civil Society (RNSC) “La Montaña Mágica” under natural forest, coffee plantation, badlands, and active and passive restoration. The main objective was to analyze the physical, chemical, and biological characteristics concerning land use, establish the baseline for SQ indicators in different land use activities, and determine the status of restoration systems for other land uses in the study site. ANOVA and Dunnett's test evaluated SQ parameters. In passive and active restoration, soil bulk density, porosity, and the number of individuals and families of macroinvertebrates were improved. The latter presented low pH and aluminum values but increased potassium compared to other soil uses. The restoration strategies favored changes in SQ indicators due to the contribution of organic carbon, a developed root system, and the recirculation of nutrients in the edaphic system. This study provided information on changes in SQ with soil usage as a practical tool to evaluate ecological restoration methods in natural areas of the eastern Colombian Andes.

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The influence of land-use on tropical soil chemical characteristics with emphasis on aluminium

Cited by 4 publications

References 15 publications

Evaluation du carbone organique des sols de la province de l’Estuaire (NW, Gabon) selon le type d’occupation

Evaluation du carbone organique des sols de la province de l’Estuaire (NW, Gabon) selon le type d’occupation

Effect of farming on the vegetation structure, soil properties and termite assemblages in the northern Congo Basin

Soil quality: an indicator of recovery in a nature reserve in the Colombian Andes

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