Perdas de solo, água, nutrientes e carbono orgânico em Cambissolo e Latossolo sob chuva natural

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

doi:10.1590/s0100-204x2005001200010

Cited by 58 publications

(72 citation statements)

References 11 publications

(3 reference statements)

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“…Altogether, all cover plants under contour seeding showed lesser losses of organic carbon and nutrients than when planted downslope. Similar results were found by Silva et al (2005) and Cardoso et al (2012). Table 7 -Total losses of P, K + , Ca 2+ , Mg 2+ and soil organic matter (SOM) from the Red-Yellow Argisol, under control plot (C), pigeon bean under downslope tillage (PBds), pigeon bean under contour seeding (PBc), jack bean under downslope tillage (JBds), jack bean under contour seeding (JBc), millet under downslope tillage (Mds) and millet under contour seeding (Mc), under natural rainfall conditions at Lavras, MG.…”

Section: Resultssupporting

confidence: 91%

“…Similar results were found by Bertol et al (2004) and Silva et al (2005). These authors affirm that these results might be explained by the high affinity between the clay fraction and the organic carbon, propitiating a selective type of erosion, where the colloidal mineral fraction and the organic matter are the first soil constituents to be removed by water erosion, in view of their low density.…”

Section: Resultssupporting

confidence: 80%

“…Silva et al (2005), Silva et al (2010), Castro et al (2011), andCardoso et al (2012) also registered high rainfall erosive potentials during the period of November thru March in the Minas Gerais state.…”

Section: Resultsmentioning

confidence: 91%

“…RER above 1.0 indicates that the concentration of eroded sediments is higher than on the original soil, characterizing the selectivity of the dragging material in the process of water erosion, which transports mainly finer particles, the more reactive soil fraction, and consequently the more capable of carrying nutrients and organic carbon (HERNANI;KURIHARA;SILVA, 1999;SILVA et al, 2005). facilitating its transportation by the runoff (AGUIAR et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

“…Runoff enrichment rate (RER) was determined by dividing the values of nutrient content on runoff sediments by the contents obtained from the 0-20 cm depth of the original soil (HERNANI; KURIHARA; SILVA, 1999;SILVA et al, 2005). The Sediments Drag Potential (SDP) was calculated dividing soil losses (t ha -1 ) by water losses (mm) (MARTINS et al, 2003).…”

Section: Methodsmentioning

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: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

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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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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Twelve years of soil preservation and rehabilitation on the Rio do Peixe watershed: promoting conservation agriculture

et al. 2021

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This study aimed to evaluate the works undertaken on the Rio do Peixe watershed by the Coordination of Agricultural Defense (CDA) over 12 years, where conservationist agriculture practices have been used since 2007 to promote the recovery of degraded areas, the reduction of erosion and the improvement of water quality. In addition, we evaluated the performance of innovative diagnostic strategies used to identify erosion spots in the river basin. The effective supervision of large farmland areas is a common problem that requires the development of cost-effective tools while keeping a close interaction with stakeholders. From 2007 to 2017, 176 properties (23,103 ha) were inspected and notified to fulfill the soil conservation laws, using the Conventional CDA methodology (i.e., field assessment by an agronomist). In the Marília sector, the Innovative CDA Methodology (with remote sensing) was used, enabling the audit of 52 properties covering 27,775 ha in 2 years. Each landowner was requested to submit technical projects using conservationist practices to be implemented under CDA guidelines.Methods included vegetation cover and crop rotation (control of laminar erosion) and implementation of agricultural terraces, bypass channels, and containment basins (management of gullies erosion). The activities carried out promoted a shift from conventional agriculture, which was impacting soil fertility and water quality, towards conservation agriculture. Degraded pastures were converted into annual cropping areas using No-Tillage (zero tillage) farming techniques. Other pastures were recovered, through Integrated Crop-Livestock Systems, increasing its stocking rate. The undertaken activities were labor-intensive but beneficial for farmers and for the quality of waterbodies.

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Perdas de solo, água, nutrientes e carbono orgânico em Cambissolo e Latossolo sob chuva natural

Cited by 58 publications

References 11 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

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

Twelve years of soil preservation and rehabilitation on the Rio do Peixe watershed: promoting conservation agriculture

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