Escoamento superficial e desagregação do solo em entressulcos em solo franco-argilo-arenoso com resíduos vegetais

Cassol, Elemar Antonino; Cantalice, José Ramon Barros; Reichert, José Miguel; Mondardo, Arcângelo

doi:10.1590/s0100-204x2004000700010

Cited by 33 publications

(24 citation statements)

References 7 publications

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“…In PVA, soil loss rates were almost 21 times lower in the reforestation system than in the bare system. Cassol and Lima (2003), Cassol et al (2004) and Xu et al (2013) studied the effect of vegetation cover on water erosion in Argisols with erosion plots similar to those of this study, and obtained soil losses ten times smaller in systems with vegetation cover, when compared with those with bare soil.…”

Section: Soil and Water Lossessupporting

confidence: 72%

Soil, water, nutrients and soil organic matter losses by water erosion as a function of soil management in the Posses sub-watershed, Extrema, Minas Gerais, Brazil

Bispo

Silva

Pontes

et al. 2017

SCA

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Knowledge of the quantity and quality of the material lost by soil erosion due to soil management is a basic need to identify land management zones in catchments. The aim of this study was to investigate the influence of soil management on the quantity and quality of soil material lost by erosion in the Posses sub-watershed, Municipality of Extrema, State of Minas Gerais, Brazil. Water and sediments lost by natural rainfall erosion were sampled from erosion plots located on a Red-Yellow Argisol (PVA) under the following systems: bare soil, subsistence farming (maize/beans/pumpkin/jack-beans/fallow), degraded pasture, well-managed pasture, and reforestation set up in 2013; and in a Litholic Neosol (RL): reforestation set up in 2008, bare soil, and native forest. Ca, Mg, K, P, N and soil organic matter (SOM) contents were determined in sediment and soil samples (at 0-5 cm depth) for the determination of the runoff enrichment ratios. Management influences soil losses more so than water losses. Minor losses were found in reforestation set up in 2013 (soil); in well-managed pasture (water); and in reforestations (nutrients and SOM). These losses tend to stability with time. The general sequence of nutrient losses was N > Ca > Mg > K > P in PVA; and N > Ca > K > Mg > P in RL. Loss rates of SOM and N followed the order: bare soil > subsistence farming > degraded pasture > well-managed pasture > reforestation, in PVA; and bare soil > native forest > reforestation, in RL. Reforestation and well-management pasture are effective conservation strategies in order to lower the erosion process in the Posses sub-watershed. Soil losses, as well as nutrients and organic matter losses were more influenced by soil management than water losses. The safeguarding native forest under Litholic Neosol is essential to the conservation of this pedoenvironment, especially in steep slopes.

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Section: Soil and Water Lossessupporting

confidence: 72%

Soil, water, nutrients and soil organic matter losses by water erosion as a function of soil management in the Posses sub-watershed, Extrema, Minas Gerais, Brazil

Bispo

Silva

Pontes

et al. 2017

SCA

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“…In SPD with 100% soil cover, Cassol & Lima (2003) and Cassol et al (2004) observed losses of soil and water ten times lower when compared to the bare soil (0% cover). Bertol et al (2007) found that the PD, due to the greater soil cover, promoted 57% reduction in water loss and 88% in soil loss, compared to the PC.…”

Section: Discussionmentioning

confidence: 87%

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

et al. 2015

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The aim of this study was to estimate water erosion costs associated with nutrient losses in four different rates of artificial cover. The experiment was carried out from 1987 to 1996 in runoff plots to measure soil losses in Campinas, State of Sao Paulo, in an Ferralsol under natural rainfall. The experimental design was completely randomized, with four treatments (0%, 24%, 40% and 90% artificial cover) and three replications. To estimate costs, P, K + , Ca 2+ and Mg 2+ concentrations in runoff water and soil removed by erosion were summed up, converted into triple superphosphate, potassium chloride and dolomitic limestone and multiplied by their respective market prices. The results indicate that, under the experimental conditions, the greater the percentage of soil cover, the lower the losses of water, soil, organic matter and nutrients. The soil with 90% cover presented reduction of 51.97% in average water losses, 54.44 in soil losses and 54.91% in organic matter losses than the treatment with 0% cover. In bare soil, losses were estimated at 16% P 2 O 5 and 8% KCl in terms of the amount of fertilizers recommended. Costs varied from US$ 107.76 ha -1 year -1 in bare soil (0% cover) to US$ 18.15 ha -1 year -1 in soil with 90% cover. With these values, losses were estimated at 616.5 million tons of soil per year for Brazil, as a result of soil erosion in annual crops, and cost of this process is around US$ 1.3 billion per year.

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“…Esses valores se mostram superiores aos tratamentos CN, CM e N2, em que a cobertura vegetal proporcionou descarga líquida e a ordem de 10 -6 e 10 -7 m 2 s -1 , corroborando com o valor encontrado por Cassol et al (2004), para uma parcela experimental com 80% de cobertura de palha, utilizando simulador de chuvas.…”

Section: Resultsunclassified

Características hidráulicas e perdas de solo e água sob cultivo do feijoeiro no semi-árido

Santos

Montenegro

Pedrosa

2009

Rev. bras. eng. agríc. ambient.

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RESUMOA região semi-árida apresenta chuvas escassas, irregulares e de secas freqüentes, sendo usual a ocorrência de eventos de alta intensidade. Os solos são pedregosos e rasos, dificultam a prática regular da agropecuária, comprometem freqüen-temente a produtividade e tornam esses ambientes vulneráveis à erosão. Objetivou-se avaliar o desempenho de práticas conservacionistas sob a cultura do feijoeiro, no controle de perdas de solo e água por erosão hídrica, em Neossolo Flú-vico do semi-árido, com cultivo de sequeiro. Chuvas simuladas com intensidades de 60 mm h -1 foram aplicadas sobre os seguintes tratamentos: cultivo em nível (N1) com barramentos de pedra entre cada fileira de plantio, no espaçamento de 0,5 m; cultivo em nível (N2) com barramentos de pedra no espaçamento de 1,0 m; cultivo morro abaixo (MA); cultivo em nível com cobertura morta (CM), de palha de feijão; parcelas desmatadas (D) e com cobertura natural (CN). Dentre os tratamentos avaliados, verificou-se que a adoção de cobertura morta permitiu, em média, redução nas perdas de solo de 86,91% em relação à parcela sem cobertura, com valores próximos ao da condição ideal de cobertura, que é a condição natural, durante todo o ciclo da cultura.Palavras-chave: cultivo de sequeiro, escoamento superficial, práticas conservacionistas Hydraulic characteristics and soil and water losses under bean cultivation in the semiarid ABSTRACTThe semiarid zone presents scarce and irregular rainfall with frequent droughts, with the occurrence of high intensity events being usual. The soils are shallow and stony, which limits regular agriculture practice, usually reducing productivity and turning this environment susceptible to erosion. The objective of this study was to evaluate the influence of conservation practices, under bean crop, upon soil and water losses by the hydric erosion, in a Fluvic Neossol in the semiarid zone, with rainfed crop. Simulated rainfall has been applied with 60 mm h -1 intensity under the following treatments: cultivation in contour lines (N1) with rock barriers between each row of plantation, spacing 0.5 m; cultivation in contour lines (N2) with rock barriers between each row of plantation, spacing 1.0 m; downslope cultivation (DS); cultivation in contour lines with mulch cover (MC), using bean straws; cleared bare soil (CB) and natural covering (CN). Among the used treatments, the mulch cover option allowed, on average, a soil loss reduction of 86.91% in relation to the plot with cleared bare soil, with values close to the ones for the ideal condition of covering, which is the natural condition, during whole crop cycle.

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Escoamento superficial e desagregação do solo em entressulcos em solo franco-argilo-arenoso com resíduos vegetais

Cited by 33 publications

References 7 publications

Soil, water, nutrients and soil organic matter losses by water erosion as a function of soil management in the Posses sub-watershed, Extrema, Minas Gerais, Brazil

Soil, water, nutrients and soil organic matter losses by water erosion as a function of soil management in the Posses sub-watershed, Extrema, Minas Gerais, Brazil

Perdas e custos associados à erosão hídrica em função de taxas de cobertura do solo

Características hidráulicas e perdas de solo e água sob cultivo do feijoeiro no semi-árido

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