Erosivity of rainfall in Lages, Santa Catarina, Brazil

Schick, Jefferson; Bertol, Ildegardis; Cogo, Neroli Pedro; Paz‐González, Antonio

doi:10.1590/s0100-06832014000600024

Cited by 30 publications

(17 citation statements)

References 30 publications

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“…The climate is Cfb, humid mesothermal, according to the Köppen classification system (Alvares et al, 2013). Annual rainfall is 1,533 mm, 824 in the spring/summer and 709 in the autumn/winter, while the annual erosivity is 5,033 MJ mm ha -1 h -1 , 3,254 in the spring/summer and 1,779 in the autumn/winter, at the site of the experiment (Schick et al, 2014). The soil is a Cambissolo Húmico Alumínico léptico (Santos et al, 2013) The soil management treatments, with two experimental units, or plots, per treatment, randomly distributed were a) soil with a crop: one plowing + two harrowings, called conventional tillage (CT); one chisel plowing + one harrowing, called minimum tillage (MT); without tillage, called direct seeding or no-tillage (NT); and b) bare soil without a crop (control) -one plowing + two harrowings (BS).…”

Section: Methodsmentioning

confidence: 98%

Nutrient and Organic Carbon Losses, Enrichment Rate, and Cost of Water Erosion

Bertol

Luciano

Bertól

et al. 2017

Rev. Bras. Ciênc. Solo

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Soil erosion from water causes loss of nutrients and organic carbon, enriches the environment outside the erosion site, and results in costs. The no-tillage system generates increased nutrient and C content in the topsoil and, although it controls erosion, it can produce a more enriched runoff than in the conventional tillage system. This study was conducted in a Humic Cambisol in natural rainfall from 1997 to 2012 to quantify the contents and total losses of nutrients and organic C in soil runoff, and to calculate the enrichment rates and the cost of these losses. The treatments evaluated were: a) soil with a crop, consisting of conventional tillage with one plowing + two harrowings (CT), minimum tillage with one chisel plowing + one harrowing (MT), and no tillage (NT); and b) bare soil: one plowing + two harrowings (BS). In CT, MT, and NT, black oat, soybean, vetch, corn, turnip, and black beans were cultivated. Over the 15 years, 15. were used in the soil. The P, K, Ca, Mg, and organic C contents in the soil were determined and also the P, K, Ca, and Mg sediments in the runoff water. From these contents, the total losses, the enrichment rates (ER), and financial losses were calculated. The NT increased the P, K, and organic C contents in the topsoil. The nutrients and organic C content in the runoff from NT was greater than from CT, showing that NT was not a fully conservationist practice for soil. The linear model y = a + bx fit the data within the level of significance (p≤0.01) when the values of P, K, and organic C in the sediments from erosion were related to those values in the soil surface layer. The nutrient and organic C contents were higher in the sediments from erosion than in the soil where the erosion originated, generating values of ER>1 for P, K, and organic C. The value of the total losses of nutrients in the form of triple superphosphate fertilizer, potassium chloride, and urea and limestone by water erosion was higher in CT than in NT. For triple superphosphate, the cost of erosion losses was 29 % higher in NT than in CT, while in urea and limestone, the effectiveness of NT in reducing costs was 65 and 50 %, respectively.

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Section: Methodsmentioning

confidence: 98%

Nutrient and Organic Carbon Losses, Enrichment Rate, and Cost of Water Erosion

Bertol

Luciano

Bertól

et al. 2017

Rev. Bras. Ciênc. Solo

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“…The research was conducted in an experimental field with a mean slope of 0.134 m m −1 (moderately sloping surface), located in southern Brazil at coordinates 27º47' S and 50 o 18' W. The climate is Cfb type according to the Köppen classification with average annual rainfall of 1,535 mm (Schick et al, 2014 Prior to this experiment, the study site was submitted to simulated rainfall with soybean (Glycine max L.) and maize (Zea mays L.) crops sown in contour and downhill in no tillage, except for the site where the bare soil treatment was installed, which was already uncropped. At the end of the last crop cycle, above-ground residues were removed and then ryegrass (Lolium multiflorum Lam.)…”

Section: Description Of the Study Sitementioning

confidence: 99%

Water erosion in surface soil conditions: runoff velocity, concentration and D50 index of sediments in runoff

Ramos

Bertol

Barbosa

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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“…Although erosivity had not been calculated by the standard method recommended by Wischmeier and Smith (1978), it is possible to estimate that it was higher in that season due to the greater volume of rainfall at that time of year. This statement is based on the work carried out by Schick et al (2014) considering the rains of Lages city in Santa Catarina State. The higher WL in this season can be attributed to the higher water content in the soil due to the lower evaporative demand (lower temperature) and the higher precipitation volume, which accelerated the onset of surface runoff, increasing the runoff volume.…”

Section: Discussionmentioning

confidence: 99%

“…The experimental area is located in the mountainous region of Santa Catarina (W50º05 'and S27º33'), at an altitude of 841 m. The climate of the region is of the type Cfb, according to Köppen, with the annual precipitation of 1,533 mm (SCHICK et al, 2014). The soil is a Humic Dystrudept (Soil Survey Staff, 2014), with 340, 184, 234 and 237 g kg -1 of clay, coarse sand, fine sand, and silt respectively 3.2 and 31 mg dm -3 of phosphorus (P) and potassium (K), respectively, 4.7% of organic matter (OM) and 1.1 and 0.8 cmol c dm -3 of calcium (Ca) and magnesium (Mg) respectively, described in Magro (2012).…”

Section: Methodsmentioning

confidence: 99%

WATER EROSION UNDER THREE TILLAGE METHODS IN A CULTIVATION OF Eucalyptus benthamii

et al. 2018

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-Soil tillage influences the development of forests planted in the initial phase, which affects some hydrological processes and water erosion. The objective of this study was to quantify the water losses (WL) and soil losses (SL) by water erosion, between the second and third years of eucalyptus (Eucalyptus benthamii) crop, in an experiment located in southern Brazil, on a Humic Dystrudept. Was study three soil tillage treatments: i) subsoiling in downslope direction (SD); ii) subsoiling in contour on the slope (SC); iii) manual holes (MH). The plots had a dimension of 12 x 24 m, being the slope-wise length the greatest, monitored by tanks placed at the lower end for runoff collection. Runoff volume measurement and sampling for subsequent calculation of WL and SL was carried out weekly, corresponding to the rains accumulated during the week. The crop of eucalyptus in SD treatment, weakened the soil as to the water erosion in relation to the crop made in SC and in MH; the difference was 25% for the WL and 53% for the SL. Eucalyptus reforestation played an important role in the control of water erosion, regardless of the type of soil tillage. The SL due to water erosion were more influenced than the WL, regardless of the type of soil crop used. WL and SL are related to each other and to rainfall height in positive linear relationship, regardless of the type of soil preparation used for eucalyptus planting.Keywords: Reforestation; Water loss; Soil conservation. EROSÃO HÍDRICA EM TRÊS MÉTODOS DE PREPARO DO SOLO NUM CULTIVO DE EUCALYPTUS BENTHAMIIRESUMO -O preparo mecânico do solo é uma das operações mais importantes de manejo na fase inicial de desenvolvimento das florestas plantadas, pois afeta alguns processos do ciclo hidrológico e a erosão hídrica, sendo, por isso, importante o conhecimento dessas variáveis. Com o presente trabalho objetivouse quantificar as perdas de água e solo por erosão hídrica pluvial, entre o segundo e o terceiro ano de cultivo do Eucalyptus benthamii, em um experimento situado no Sul do Brasil, sobre um Cambissolo Húmico alumínico léptico, em três tratamentos de preparo do solo: i) preparo com subsolagem a favor do declive; ii) preparo com subsolagem em contorno ao declive; iii) preparo em covas com coveador manual. As parcelas tinham dimensão de 12 x 24 m, com o maior comprimento no sentido do declive, monitoradas por tanques colocados ao seu final para coleta da enxurrada. A medição do volume e a coleta de amostras da enxurrada para posterior cálculo de perdas de água e solo foi realizada semanalmente, correspondendo às chuvas acumuladas na semana. O preparo do solo a favor do declive apresentou perdas de água e solo maiores do que em contorno e em covas, cuja diferença foi 25 % para as perdas de água e 53 % para as perdas de solo. O crescimento das plantas ocasionou sensível diminuição do escoamento superficial, evidenciando que o reflorestamento, nas condições experimentais, pode controlar a erosão hídrica. As perdas de solo por erosão hídrica foram influenciadas em magnitude...

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Erosivity of rainfall in Lages, Santa Catarina, Brazil

Cited by 30 publications

References 30 publications

Nutrient and Organic Carbon Losses, Enrichment Rate, and Cost of Water Erosion

Nutrient and Organic Carbon Losses, Enrichment Rate, and Cost of Water Erosion

Water erosion in surface soil conditions: runoff velocity, concentration and D50 index of sediments in runoff

WATER EROSION UNDER THREE TILLAGE METHODS IN A CULTIVATION OF Eucalyptus benthamii

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