Soil property variations in relation to topographic aspect and vegetation community in the south-eastern highlands of Ethiopia

Yimer, Fantaw; Ledin, Stig; Abdelkadir, Abdu

doi:10.1016/j.foreco.2006.05.055

Cited by 153 publications

(114 citation statements)

References 47 publications

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“…Referindo-se às interfaces solo-vegetação, Yimer et al (2006) destacam que a diversidade fitofisionômica relaciona-se a variação de características edáficas, especialmente a disponibilidade de nutrientes e o teor de alumínio no solo. Por outro lado, Rezaei e Gilkes (2005) sugerem que há uma estreita relação entre fitofisionomias e a variação das formas de relevo e topografia, bem como suas interferências na dinâmica da água no solo.…”

Section: Introductionunclassified

Interferências dos pedoambientes nos atributos do solo em uma topossequência de transição Campos/Floresta

Campos¹,

Ribeiro²,

Júnior³

et al. 2010

Rev. Ciênc. Agron.

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4Resumo -As condições pedoambientais promovem alterações nos atributos do solo. Sendo assim, o objetivo deste trabalho foi estudar as interferências dos pedoambientes nos atributos do solo de uma topossequência de transição Campos/Floresta na região de Humaitá, AM. Escolheu-se uma topossequência característica de sequência Campos/ Floresta, em seguida foi estabelecido um caminhamento, partindo do ambiente de campo natural até o ambiente de floresta. Esses pedoambientes foram identificados e delimitados conforme a expressão dos padrões vegetacionais. Foram coletadas 20 amostras laterais ao caminhamento, representativas de cada uma das unidades pedoambientais da topossequência (campo alto: 0,0-14 e 0,30-0,66 m; campo baixo: 0,0-0,15 e 0,27-0,80 m; zona de ecótono: 0,0-0,15 e 0,32-0,50 m; floresta: 0,0-0,15 e 0,67-100 m), totalizando 80 amostras. O critério de escolha das profundidades foi a coincidência com os horizontes diagnósticos superficiais e subsuperficiais determinados na descrição morfológica dos perfis. Foram realizadas análises físicas de textura, argila dispersa e grau de floculação, densidades do solo e das partículas, porosidade total e condutividade hidráulica. Nas análises químicas foram determinados pH em água e KCl, Ca, Mg, K, Na e Al trocáveis, P disponível, H+Al e C orgânico. Os atributos físicos e químicos do solo apresentaram-se dependentes dos pedoambientes. Com o uso das técnicas estatísticas multivariadas foi possível distinguir três diferentes ambientes que equivalem a três pedoambientes.Palavras-chave -Solos da Amazônia. Campos Naturais. Pedogênese. Abstract -The pedoenvironmental conditions promote changes in soil properties, so the aim of this work was to study Interference of the pedoenvironment on soil properties in a topossequence of the Grassland/Forest transition in the Humaitá region, AM. Was picked up a topossequence characteristic sequence Grassland/Forest, then a pathway was established, from a field environment to the natural forest environment. These pedoambients were identified and defined as the expression patterns of vegetation. Were collected 20 samples at the representative side of the profiles in each one of the pedoambiental units of the topossequence (top grassland: 0.0-14 and 0.30-0.66 m;low grassland : 0.0-0.15 and 0.27-0.80 m; ecotone zone: 0.0-0.15 and 0.32-0.50 m; forest: 0.0-0.15 m 0.67-100 as a total of 80 samples) being the criteria for sampling depths the coincidence with the surface and subsurface diagnostic horizons determined by the morphological description of the profiles. Were performed physical analysis of texture, clay dispersion and flocculation, soil bulk density and particle porosity and hydraulic conductivity. In the chemical analysis were determined pH in water and KCl, Ca, Mg, K, Na and Al contents, available P, H + Al and organic carbon. The physical and chemical soil were dependent on the pedoambients. With the use of multivariate statistical techniques was possible to distinguish three different environments that are equivalent to three pedo...

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Section: Introductionunclassified

Interferências dos pedoambientes nos atributos do solo em uma topossequência de transição Campos/Floresta

Campos¹,

Ribeiro²,

Júnior³

et al. 2010

Rev. Ciênc. Agron.

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show abstract

“…Our results indicate that TWI plays an important role in the model calibration. This topographic index, combines local upslope contributing area and slope and seems to be a key to understand much of the hydrological processes and soil properties (Sørensen et al, 2006;Yimer et al, 2006). It is reported that TWI was positively correlated with soil organic matter (Pei et al, 2010), which indirectly supports the central role of organic matter in the mobilization of As in groundwater Fendorf et al, 2010;Rowland et al, 2007).…”

Section: Logistic Regression Modelmentioning

confidence: 93%

Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

Zhang

Rodríguez‐Lado

Johnson

et al. 2012

Environmental Pollution

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a b s t r a c tShanxi Province is one of the regions in northern China where endemic arsenicosis occurs. In this study, stepwise logistic regression was applied to analyze the statistical relationships of a dataset of arsenic (As) concentrations in groundwaters with some environmental explanatory parameters. Finally, a 2D spatial model showing the potential As-affected areas in this province was created. We identified topography, gravity, hydrologic parameters and remote sensing information as explanatory variables with high potential to predict high As risk areas. The model identifies correctly the already known endemic areas of arsenism. We estimate that the area at risk exceeding 10 mg L À1 As occupies approximately 8100 km 2 in 30 counties in the province.

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“…The upper zone characterized by more steep slopes, high sand content and high precipitation, conditions that encourage Roukos et al: The effect of altitudinal zone on soil properties, species composition and forage production in a subalpine grassland in northwest soil erosion more than the other altitudinal zones. This has leaded to selectively transport clay and silt fractions from the higher altitudes down the slopes leaving behind sand fractions (Yimer et al, 2006). In high precipitation environments too much precipitation can result in nutrient leaching in sandy soils (Anderson et al, 1998) and soil stability is influenced by secondary clay minerals (Manyeverea et al, 2016).…”

Section: Slope Degree and Soil Propertiesmentioning

confidence: 99%

“…Available P was significantly (p<0.05) higher at upper zone. However, the higher available P levels suggest that more P is present in forms available for plant uptake which may be probably be due to increased phosphorus fixation and lower rates of decomposition as suggested by Yimer et al (2006).…”

Section: Slope Degree and Soil Propertiesmentioning

confidence: 99%

The Effect of Altitudinal Zone on Soil Properties, Species Composition and Forage Production in a Subalpine Grassland in Northwest Greece

Roukos¹,

Akrida-Demertzi²,

Koutsoukis³

et al. 2017

Appl Ecol Env Res

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Roukos et al. : The effect of altitudinal zone on soil properties, species composition and forage production in a subalpine grassland in northwest Abstract. The impact of altitudinal gradient on soil properties, species composition and forage production was assessed in the subalpine grassland of "Kostilata" in northwestern Greece. The area is important for endemic species and for its traditional transhumant livestock system. Soil properties, species composition and forage production were determined annually and monthly during three consecutive years (April 2013 -October 2015 from thirty experimental plots located in three altitudinal zones (i.e., lower, middle, and upper). Our results suggested that the altitudinal zo ne strongly affected soil physical and chemical properties, species composition and forage production. Indeed, altitude a.s.l. was positively correlated with soil sand content and negatively correlated with forage production. It is found that stocking rate exceeded the grazing capacity, which posed a hazard to grassland sustainability; a belief amplified by the high sand content in soil and a terrain with steep slopes, which would increase the risk of further soil erosion at all altitudinal zones.

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Soil property variations in relation to topographic aspect and vegetation community in the south-eastern highlands of Ethiopia

Cited by 153 publications

References 47 publications

Interferências dos pedoambientes nos atributos do solo em uma topossequência de transição Campos/Floresta

Interferências dos pedoambientes nos atributos do solo em uma topossequência de transição Campos/Floresta

Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

The Effect of Altitudinal Zone on Soil Properties, Species Composition and Forage Production in a Subalpine Grassland in Northwest Greece

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