Perdas de solo e água por erosão hídrica influenciadas por métodos de preparo, classes de declive e níveis de fertilidade do solo

Cogo, Neroli Pedro; Levien, Renato; Schwarz, Ricardo Altair

doi:10.1590/s0100-06832003000400019

Cited by 132 publications

(133 citation statements)

References 2 publications

(1 reference statement)

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“…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). These results corroborate those of Cogo, Levien and Schwarz (2003), indicating that the plant cover offers the necessary protection to the soil during highly erosive rainfall events.…”

Section: Resultssupporting

confidence: 85%

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: Resultssupporting

confidence: 85%

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

et al. 2013

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“…Drainpipes were installed along the lower part of the plots to collect the runoff in two 225 L tanks, interconnected by a Geib divisor with nine windows, where the accumulated water in the second tank corresponds to 1/9 of the total runoff Silva et al, 2005;Castro et al, 2011). Samples were collected as proposed by Cogo et al, (2003), to quantify soil loss after each erosive rainfall event.…”

Section: Thementioning

confidence: 99%

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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“…This amount of tillage is considered low and can maintain 30 to 100 % of the soil surface covered with plant residues (Soane et al, 2012). Despite economic and agronomic advantages in terms of reduced fuel consumption (Fernandes et al, 2008) and improved soil erosion control (Cogo et al, 2003), the reduced soil disturbance under NT along with the increased weight of modern agricultural machinery, have caused enough compaction of the soil surface layers to create an obstacle to the expansion of this cultivation system (Siqueira, 2008). In 2012, NT covered an area of 32 million ha in Brazil, a significant proportion of the approximately 117 million ha in the world (FEBRAPDP, 2012).…”

Section: Introductionmentioning

confidence: 99%

Aeration condition of a clayey oxisol under long-term no-tillage

Betioli

Tormena²,

Moreira

et al. 2014

Rev. Bras. Ciênc. Solo

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The hypothesis of this study was that the absence of soil tillage in long-term no-tillage (NT) systems can be detrimental to soil aeration. The objective was to assess the aeration condition of an Oxisol (Rhodic Ferrasol), very clayey texture (750 g kg-1 of clay; 200 g kg-1 of sand), after 30 years of cultivation under NT. The physical property soil air permeability (Ka) is sensitive to changes in the soil pore system. Aside from Ka, the air-filled porosity (ε a) and indices of pore continuity (K1 and N), derived from the relationship between Ka and εa, were used as indices of soil aeration. From the soil layers 0.0-0.1 and 0.1-0.2 m, 240 undisturbed samples were collected along a transect perpendicular to the crop rows, at three sampling positions: corn plant row (CR); center of the interrow (INT); and the equidistant point between CR and INT (PE). The properties Ka and εa were determined at soil matric potentials (Ψm) of -2, -4, -6, -10, -30, and -50 kPa. Soil bulk density (BD) was also determined. The results confirmed the hypothesis. In the 0.0-0.1 m layer, Ka, K1, N and Ψa were significantly greater and BD significantly lower in CR than at the other sampling positions. At a Ψm of -10 kPa, the Ka of CR was 6.9 and 8.4 times higher than in PE and INT, respectively, in the 0.0-0.1 m layer. The properties Ka, K1 and N were sensitive enough to detect changes in the pore system and their differences between the sampling positions demonstrated the importance of the spatial location for soil sampling. Tilling the crop rows provides better soil aeration under NT.

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Perdas de solo e água por erosão hídrica influenciadas por métodos de preparo, classes de declive e níveis de fertilidade do solo

Cited by 132 publications

References 2 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

Aeration condition of a clayey oxisol under long-term no-tillage

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