Erosividade da chuva e erodibilidade de Cambissolo e Latossolo na região de Lavras, sul de Minas Gerais

Silva, Antonio Marcos da; Silva, Marx Leandro Naves; Curi, Nilton; Avanzi, Junior César; Ferreira, Mozart Martins

doi:10.1590/s0100-06832009000600029

Cited by 66 publications

(62 citation statements)

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“…The lowest losses, coinciding with the lowest rainfall and erosivity levels determined during the experimental period, were observed in February. Several authors report that the highest soil and water losses occur in December, due to high rainfall and erosivity in the central region of Brazil (CARVALHO et al, 2009;SILVA et al, 2009;SILVA et al, 2010), which was not confirmed here, probably due to the more effective plant cover. The total losses of soil and water showed the following trend: bare soil > millet under downslope tillage > millet under contour seeding> pigeon pea under downslope tillage > jack bean under downslope tillage > pigeon pea under contour seeding > jack bean under contour seeding (Table 4).…”

Section: Resultscontrasting

confidence: 51%

“…When studying how agroforestry systems reduce the intensity of erosive agents, Aguiar et al (2006) observed that sediments and water losses were concentrated during the end of the rainy period, due to the previous soil moisture. Silva et al (2009) concluded that the highest risks related to water erosion occur between November and March, due to the greater rainfall erosive potential and the preceding soil moisture.…”

Section: Resultsmentioning

confidence: 99%

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Soil cover plants on water erosion control in the South of Minas Gerais

et al. 2013

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Water erosion is responsible for soil, water, carbon and nutrient losses, turning into the most important type of degradation of Brazilian soils. This study aimed to evaluate the influence of three cover plants under two tillage systems on water erosion control in an Argisol at south of Minas Gerais state, Brazil. The cover plants utilized in the study were pigeon pea, jack bean and millet, under contour seeding and downslope tillage. Experimental plots of 4 x 12 m, with 9% slope, under natural rainfall were used for the quantification of losses of soil, water, nutrients, and organic matter. One experimental plot was kept without plant cover (reference). Higher erosivity was observed in December and January, although a great quantity of erosive rainfall was detected during the whole raining period. Contour seeding provided a greater reduction of water erosion than downslope tillage, as expected. The jack bean under contour seeding revealed the lowest values of soil, water, nutrients and organic matter losses.Index terms: Soil conservation, tillage systems, vegetal cover, erosivity. RESUMOA erosão hídrica é responsável por perdas de solo, água, carbono orgânico e nutrientes, sendo esta a principal forma de degradação dos solos brasileiros. Dessa forma, objetivou-se, com este trabalho, avaliar a influência de três plantas de cobertura, em dois sistemas de manejo, no controle da erosão hídrica em um Argissolo, no sul de Minas Gerais. As plantas de cobertura utilizadas foram o feijão-guandu, feijão-de-porco e milheto, em dois sistemas de manejo (plantio em nível e em desnível no sentido do declive), sendo que uma parcela sem cobertura vegetal foi mantida como testemunha. Para a quantificação das perdas de solo, água, carbono orgânico e nutrientes utilizaram-se parcelas de 4 x 12 m em que a maior dimensão obedeceu ao sentido do declive, de 9 %, sob chuva natural. Os meses de dezembro e janeiro apresentaram a maior erosividade, porém elevada quantidade de chuvas erosivas foram detectadas durante todo o período chuvoso. O plantio em nível proporcionou maior redução da erosão hídrica em comparação ao plantio em desnível, conforme era de se supor. O feijão-de-porco cultivado em nível obteve os menores valores de perdas de solo, água, nutrientes e matéria orgânica.Termos para indexação: Conservação do solo, sistemas de manejo, cobertura vegetal, erosividade.

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Section: Resultscontrasting

confidence: 51%

Section: Resultsmentioning

confidence: 99%

Soil cover plants on water erosion control in the South of Minas Gerais

et al. 2013

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“…Bi: horizon B incipient; Bw: horizon B weathering. Source: Silva et al (2009 (6) Soil loss (%) represents soil loss for each rainfall pattern divided by total soil loss, multiplied by 100; (7) Soil loss per rainfall event (Mg ha -1 ) represents soil loss in each rainfall pattern divided by the number of erosive rainfall events. differed between CXbd and LVdf (39.1 and 1.8 Mg ha -1 soil loss from CXbd and LVdf, respectively), for the same rainfall event with only 4 h duration and an erosive potential of 1,663 MJ mm ha -1 h -1 (EI 30 ).…”

Section: Resultsmentioning

confidence: 99%

“…These examples demonstrate the need to obtain the best correlation between soil losses and the variables that constitute the rainfall erosivity index (EI 30 ), which is hampered by the limited knowledge on rainfall physical characteristics, since soil losses are related not only to their erosive potential, but also to the location of the highest peak intensity, the moisture antecedent to the rainfall and also the moisture antecedent to the peak intensity Loyola & Prevedello, 2003;Silva et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, Silva (2004) concluded that the annual erosivity is closely related to the total precipitation, with a coefficient of determination of 97 % of the parameters in erovisity maps of Brazil. Silva et al (2009) found high correlations (94 and 98 %, respectively) between rainfall erosivity (EI 30 ) and soil loss from a typic Cambisol and a typic Latosol under natural rainfall, in five years of evaluation. In the East Central region of Minas Gerais, Silva et al (2010) studied the spatialization of rainfall erosivity and found a correlation of 86 % between EI 30 rainfall erosivity and the monthly average precipitation, at nine locations.…”

Section: Introductionmentioning

confidence: 89%

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Soil losses from typic cambisols and red latosol as related to three erosive rainfall patterns

Aquino

Silva

Freitas

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYRainfall erosivity is one of the main factors related to water erosion in the tropics. This work focused on relating soil loss from a typic dystrophic Tb Haplic Cambisol (CXbd) and a typic dystrophic Red Latosol (LVdf) to different patterns of natural erosive rainfall. The experimental plots of approximately 26 m 2 (3 x 8.67 m) consisted of a CXbd area with a 0.15 m m -1 slope and a LVdf area with 0.12 m m -1 slope, both delimited by galvanized plates. Drainpipes were installed at the lower part of these plots to collect runoff, interconnected with a Geib or multislot divisor. To calculate erosivity (EI 30 ), rainfall data, recorded continuously at a weather station in Lavras, were used. The data of erosive rainfall events were measured (10 mm precipitation intervals, accuracy 0.2 mm, 24 h period, 20 min intervals), characterized as rainfall events with more than 10 mm precipitation, maximum intensity > 24 mm h -1 within 15 min, or kinetic energy > 3.6 MJ, which were used in this study to calculate the rainfall erosivity parameter, were classified according to the moment of peak precipitation intensity in advanced, intermediate and delayed patterns. Among the 139 erosive rainfall events with CXbd soil loss, 60 % were attributed to the advanced pattern, with a loss of 415.9 Mg ha -1 , and total losses of 776.0 Mg ha -1 . As for the LVdf, of the 93 erosive rainfall events with soil loss, 58 % were listed in the advanced pattern, with 37.8 Mg ha -1 soil loss and 50.9 Mg ha -1 of total soil loss. The greatest soil losses were observed in the advanced rain pattern, especially for the CXbd. From the Cambisol, the soil loss per rainfall event was greatest for the advanced pattern, being influenced by the low soil permeability.Index terms: rainfall erosivity, water erosion, kinetic energy, soil erodibility.( RESUMO: PERDAS DE SOLO EM CAMBISSOLO E LATOSSOLO VERMELHO, EM RELAÇÃO A TRÊS PADRÕES DE CHUVAS EROSIVAS

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Rates, factors, and tolerances of water erosion in the Cerrado biome (Brazil): A meta‐analysis of runoff plot data

Fonseca

Uagoda

Chaves

2021

Earth Surf Processes Landf

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Due to the high rainfall erosivity and highly erodible soils, water erosion is severe in Brazil. Soil and ecosystem degradation occurs when erosion exceeds on‐ and off‐site soil loss tolerances, with significant socioeconomic and environmental impacts. In the last 50 years, the Brazilian Cerrado had 53% of its original vegetation converted to agriculture and pastureland. Although erosion plot studies exist in the region, the data are fragmented and unexplored, hindering the development of soil conservation policies. The objective of the present research was to compile, systematize, and statistically analyze the existing erosion plot data in the Brazilian Cerrado, correlating the observed results with different environmental and management factors, and with the corresponding soil loss tolerances. Twenty runoff plot datasets of the Brazilian Cerrado, encompassing 5 states, 10 sites, 108 plots, and 360 plot·years were compiled and thoroughly analyzed. Mean annual rainfall, runoff, and soil loss were 1443.5 mm year−1, 83.1 mm year−1, and 8.9 Mg ha−1 year−1, respectively. After the data were normalized with respect to plot length, steepness, and climate, runoff and soil loss were found to be significantly higher in soils with impermeable horizons and in land uses without permanent soil cover (p < 0.05). Erosion under permanently covered plots was below the on‐ and off‐site soil loss tolerances. A power equation provided the best fit between plot runoff and soil loss (R2 = 0.71; p < 0.05), indicating that runoff volume, easier to estimate, could be used as a proxy for upslope erosion. Although erosion plot data cannot be extrapolated to the whole landscape, the research results provide useful elements for the development of sound conservation policies in the Cerrado and in other similar savannas of the world.

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Erosividade da chuva e erodibilidade de Cambissolo e Latossolo na região de Lavras, sul de Minas Gerais

Abstract: RESUMO

Cited by 66 publications

References 15 publications

Soil cover plants on water erosion control in the South of Minas Gerais

Soil cover plants on water erosion control in the South of Minas Gerais

Soil losses from typic cambisols and red latosol as related to three erosive rainfall patterns

Rates, factors, and tolerances of water erosion in the Cerrado biome (Brazil): A meta‐analysis of runoff plot data

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