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| Registros recuperados: 19 | |
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| Sardá,Luana Goulart; Higarashi,Martha Mayumi; Nicoloso,Rodrigo da Silveira; Oliveira,Paulo Armando Victória de; Falkoski,Camila; Ribeiro,Stephanie Mayara Siega; Coldebella,Arlei. |
| Abstract: The objective of this work was to contribute to the establishment of a baseline for the methane emission factor for the management of swine manure, considering the current practice of raw manure storage in two open deposits in parallel, in Southern Brazil. Methane (CH4) emissions were continuously measured in three PVC tanks of 3 m3, during 180 days, in the summer. As the content of volatile solids of pig slurry ran out in approximately 130 days, the CH4 emission factor was calculated as B0= 0.48 m3kg-1VS. Although this value is higher than the B0 estimated by Intergovernmental Panel on Climate Change for Latin America (0.29 m3 kg-1 VS), it is in agreement with the B0 estimated for developed countries (0.45 and 0.48 m3 kg-1 VS, for the US and EU,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal production; Emission factor; Global warming; Greenhouse gases; Waste management. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600657 |
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| Corrêa,Juliano Corulli; Grohskopf,Marco André; Nicoloso,Rodrigo da Silveira; Lourenço,Késia Silva; Martini,Rosemari. |
| Abstract: The objective of this work was to evaluate soil chemical attributes, leaf nitrogen content, and corn and wheat yields under a no-tillage system in response to the application of organic, organomineral, and mineral fertilizers with or without urease and nitrification inhibitors. The experiment was carried out on the field, with one wheat and two corn crops, on a Rhodic Kandiudox, in a randomized complete block design with six replicates. The evaluated treatments were: control, without fertilization; O, poultry litter as an organic fertilizer; O+I, poultry litter and inhibitors; OM, organomineral fertilizer; OM+I, organomineral fertilizer and inhibitors; U, urea as a mineral fertilizer; and U+I, super urea with the urease inhibitor alone. The use... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Zea mays; Agronomic efficiency; Poultry litter; Nitrogen fertilization; Volatilization losses. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000800916 |
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| Bragagnolo,Jardes; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Jasper,Joerg; Kunz,Junior; Teixeira,Tiago de Gregori. |
| Variable-rate nitrogen fertilization (VRF) based on optical spectrometry sensors of crops is a technological innovation capable of improving the nutrient use efficiency (NUE) and mitigate environmental impacts. However, studies addressing fertilization based on crop sensors are still scarce in Brazilian agriculture. This study aims to evaluate the efficiency of an optical crop sensor to assess the nutritional status of corn and compare VRF with the standard strategy of traditional single-rate N fertilization (TSF) used by farmers. With this purpose, three experiments were conducted at different locations in Southern Brazil, in the growing seasons 2008/09 and 2010/11. The following crop properties were evaluated: above-ground dry matter production, nitrogen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Site-specific management; Optical spectrometry; Precision agriculture; Soil fertility. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500018 |
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| Campos,Ben-Hur Costa de; Amado,Telmo Jorge Carneiro; Bayer,Cimélio; Nicoloso,Rodrigo da Silveira; Fiorin,Jackson Ernani. |
| Soil organic matter (SOM) plays a crucial role in soil quality and can act as an atmospheric C-CO2 sink under conservationist management systems. This study aimed to evaluate the long-term effects (19 years) of tillage (CT-conventional tillage and NT-no tillage) and crop rotations (R0-monoculture system, R1-winter crop rotation, and R2- intensive crop rotation) on total, particulate and mineral-associated organic carbon (C) stocks of an originally degraded Red Oxisol in Cruz Alta, RS, Southern Brazil. The climate is humid subtropical Cfa 2a (Köppen classification), the mean annual precipitation 1,774 mm and mean annual temperature 19.2 ºC. The plots were divided into four segments, of which each was sampled in the layers 0-0.05, 0.05-0.10, 0.10-0.20, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon sequestration; No-tillage; Conventional tillage; Soil management. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300016 |
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| Girardello,Vitor Cauduro; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Hörbe,Tiago de Andrade Neves; Ferreira,Ademir de Oliveira; Tabaldi,Fabiano Mauricio; Lanzanova,Mastrângello Enívar. |
| A compactação do solo, quando em níveis elevados, é um processo de difícil reversão sob sistema de plantio direto (SPD), especialmente em solos argilosos. Geralmente, a sua ocorrência em áreas comerciais de grãos é descontínua e restrita a áreas com histórico de pressões associadas ao trânsito intenso de máquinas agrícolas. O objetivo deste trabalho foi investigar as alterações nos atributos físicos de um Latossolo Vermelho distrófico de textura argilosa (450 g kg-1) promovidas por dois tipos de escarificações sítio-específico e uma convencional (aleatória), bem como seus efeitos sobre o rendimento da soja. Para isso, selecionou-se no município de Victor Graeff, na região do planalto do RS, uma lavoura de 50,6 ha manejada sob SPD por longo prazo e,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultura de precisão; Escarificação sítio-específico; Compactação do solo; Infiltração de água no solo. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600026 |
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| Lanzanova,Mastrângello Enívar; Eltz,Flávio Luiz Foletto; Nicoloso,Rodrigo da Silveira; Cassol,Elemar Antonino; Bertol,Ildegardis; Amado,Telmo Jorge Carneiro; Girardello,Vitor Cauduro. |
| Soil erosion is one of the chief causes of agricultural land degradation. Practices of conservation agriculture, such as no-tillage and cover crops, are the key strategies of soil erosion control. In a long-term experiment on a Typic Paleudalf, we evaluated the temporal changes of soil loss and water runoff rates promoted by the transition from conventional to no-tillage systems in the treatments: bare soil (BS); grassland (GL); winter fallow (WF); intercrop maize and velvet bean (M+VB); intercrop maize and jack bean (M+JB); forage radish as winter cover crop (FR); and winter cover crop consortium ryegrass - common vetch (RG+CV). Intensive soil tillage induced higher soil losses and water runoff rates; these effects persisted for up to three years after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cover crops; Water runoff; Soil erosion. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600025 |
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| Lanzanova,Mastrângello Enívar; Eltz,Flávio Luiz Foletto; Nicoloso,Rodrigo da Silveira; Amado,Telmo Jorge Carneiro; Reinert,Dalvan José; Rocha,Marta Rodrigues da. |
| O sistema de semeadura direta, associado à utilização de plantas de cobertura, pode manter a qualidade do solo, melhorando e, ou, preservando seus atributos físicos em condições favoráveis ao desenvolvimento vegetal. O presente trabalho avaliou a densidade, porosidade, resistência à penetração e taxa de infiltração de água em um Argissolo Vermelho distrófico arênico, na área experimental do Departamento de Solos da Universidade Federal de Santa Maria, em Santa Maria, RS, após 16 anos de aplicação de sete sistemas de culturas: (1) milho (Zea mays L.) + feijão-de-porco (Canavalia ensiformis DC)/soja (Glycine max (L.) Merr.)- MFP; (2) solo descoberto - SDES; (3) milho/pousio/soja - POU; (4) milho/azevém (Lolium multiflorum Lam.) + ervilhaca-comum (Vicia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compactação do solo; Porosidade; Infiltração de água; Plantas de cobertura; Leguminosas tropicais; Nabo forrageiro. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400030 |
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| Nicoloso,Rodrigo da Silveira; Amado,Telmo Jorge Carneiro; Schneider,Sérgio; Lanzanova,Mastrângello Enívar; Girardello,Vitor Cauduro; Bragagnolo,Jardes. |
| A compactação é uma das principais causas de decréscimo da produtividade dos solos agrícolas. A escarificação mecânica tem sido sugerida para reduzir a compactação do solo em áreas sob sistema de semeadura direta consolidada. Outra opção para aliviar a compactação é o uso de plantas de cobertura com sistema radicular pivotante e bem desenvolvido, como o nabo-forrageiro, com capacidade de crescer em camadas compactadas, formar bioporos estáveis e melhorar os atributos físicos do solo. O objetivo deste trabalho foi avaliar a eficiência do método mecânico (escarificador) e do método biológico (nabo-forrageiro) de descompactação do solo, ou de ambos associados, em promover a melhoria dos atributos físicos de um Latossolo de textura muito argilosa e o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Compactação do solo; Escarificador; Plantas de cobertura; Infiltração de água; Resistência do solo à penetração. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000400037 |
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| Campos,Ben-Hur Costa de; Amado,Telmo Jorge Carneiro; Tornquist,Carlos Gustavo; Nicoloso,Rodrigo da Silveira; Fiorin,Jackson Ernani. |
| Soil C-CO2 emissions are sensitive indicators of management system impacts on soil organic matter (SOM). The main soil C-CO2 sources at the soil-plant interface are the decomposition of crop residues, SOM turnover, and respiration of roots and soil biota. The objectives of this study were to evaluate the impacts of tillage and cropping systems on long-term soil C-CO2 emissions and their relationship with carbon (C) mineralization of crop residues. A long-term experiment was conducted in a Red Oxisol in Cruz Alta, RS, Brazil, with subtropical climate Cfa (Köppen classification), mean annual precipitation of 1,774 mm and mean annual temperature of 19.2 ºC. Treatments consisted of two tillage systems: (a) conventional tillage (CT) and (b) no tillage (NT) in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Management systems; No tillage; Conventional tillage; Greenhouse gases. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300017 |
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| Lanzanova,Mastrângello Enívar; Nicoloso,Rodrigo da Silveira; Lovato,Thomé; Eltz,Flávio Luiz Foletto; Amado,Telmo Jorge Carneiro; Reinert,Dalvan José. |
| A compactação do solo é um dos principais fatores responsáveis pela queda da produtividade das culturas agrícolas. Por isso, o impacto causado pelo pisoteio bovino sobre o solo e os conseqüentes reflexos nos atributos físicos densidade do solo, porosidade do solo, resistência mecânica à penetração e infiltração de água no solo, em área manejada sob sistema integração lavoura-pecuária, foram investigados em experimento de campo, no município de Jari, na região do Planalto Médio do Rio Grande do Sul, Brasil. Foram avaliados três sistemas de manejo da pastagem de inverno (aveia-preta, Avena strigosa Schreber + azevém, Lolium multiflorum Lam.), caracterizados pela freqüência de pastejo: (1) Sem Pastejo (SP), (2) Pastejo a cada 28 dias (P28) e (3) Pastejo a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pastejo rotativo; Compactação do solo; Pisoteio animal; Manejo do solo; Infiltração de água; Pastagem cultivada. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000500028 |
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| Bragagnolo,Jardes; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Santi,Antônio Luis; Fiorin,Jackson Ernani; Tabaldi,Fabiano. |
| Generally, in tropical and subtropical agroecosystems, the efficiency of nitrogen (N) fertilization is low, inducing a temporal variability of crop yield, economic losses, and environmental impacts. Variable-rate N fertilization (VRF), based on optical spectrometry crop sensors, could increase the N use efficiency (NUE). The objective of this study was to evaluate the corn grain yield and N fertilization efficiency under VRF determined by an optical sensor in comparison to the traditional single-application N fertilization (TSF). With this purpose, three experiments with no-tillage corn were carried out in the 2008/09 and 2010/11 growing seasons on a Hapludox in South Brazil, in a completely randomized design, at three different sites that were analyzed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; N-Sensor; Optical spectrometry; Precision farming. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500019 |
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| Hentz,Paulo; Corrêa,Juliano Corulli; Fontaneli,Renato Serena; Rebelatto,Agostinho; Nicoloso,Rodrigo da Silveira; Semmelmann,Claudio Eduardo Neves. |
| ABSTRACT Organic fertilizers derived from poultry litter and pig slurry are alternatives to mineral fertilizers in increasing soil nutrient availability. The aim of this study was to evaluate soil response, through characterization of organic C and available N, P, and K contents, and corn yield response to increasing amounts of poultry litter, pig slurry, and mineral fertilizers in an integrated crop-livestock production system (ICL) from 2011 to 2013. The experimental design consisted of randomized blocks in a 4 × 3 + 1 factorial arrangement with four replicates. The treatments consisted of four types of fertilizer, two organic (poultry litter and pig slurry) and two mineral, balanced with the same amounts of N, P and K as the organic fertilizers, one of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral fertilizers; Organic carbon; Nitrogen. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100535 |
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| Lourenço,Késia Silva; Corrêa,Juliano Corulli; Ernani,Paulo Roberto; Lopes,Letícia dos Santos; Nicoloso,Rodrigo da Silveira. |
| O feijoeiro é tradicionalmente cultivado em pequenas propriedades, onde é comum o uso de dejetos animais para adubação das culturas. Como é uma cultura de ciclo curto, os nutrientes precisam estar disponíveis logo após a germinação, o que nem sempre acontece quando a fertilização ocorre a partir de fertilizantes orgânicos. Neste trabalho, objetivou-se avaliar a eficiência de diferentes camas de aves em relação aos fertilizantes minerais na produção de matéria seca e na liberação de nutrientes para o feijoeiro, em casa de vegetação. O experimento foi conduzido em 2010, com amostras de um Latossolo Vermelho distroférrico com 16 g kg-1 de matéria orgânica, 1,9 e 84 mg dm-3 de P e K, respectivamente, e pH 6,0. Adotou-se delineamento experimental de blocos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogênio; Fósforo; Potássio; Dejetos animais; Disponibilidade de nutrientes. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200017 |
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| Nora,Douglas Dalla; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Mazuco,Antonio Cesar Batista; Piccin,Marcieli. |
| ABSTRACT Improvement of soil chemical properties in dystrophic Oxisols managed under long-term no-tillage system (NTS) with surface broadcast lime has been, frequently, restricted to a shallow topsoil layer. As a consequence, a sharply-defined chemical quality gradient is created, with deterioration from the surface towards deeper layers in Oxisols in southern Brazil. The aim of this study was to assess the temporal effects of gypsum, applied alone or in combination with lime, on Ca2+ content and Al3+ saturation in the rooting zone (RZ) (0.00-0.40 m). Four experiments were conducted from 2009 to 2014 in Typic Hapludox soils with distinct chemical qualities in the RZ managed under a long-term NTS (over 20 years) in Rio Grande do Sul (subtropical region). A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium; Base saturation; Al saturation; Subsoil. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100517 |
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| Nora,Douglas Dalla; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Gruhn,Eduardo Müller. |
| ABSTRACT Modern maize, wheat, and soybean cultivars are usually characterized by a short cycle, high shoot-root ratio, and high responsiveness to nutrient input. Continuous no-tillage management (NTS) frequently leads to a steep gradient in soil chemical quality with depth, thus decreasing yield under conditions of acid subsoil and water stress. This study aimed to evaluate the effect of gypsum, applied separately or in combination with lime, on the yield of cultivars used in the state of Rio Grande do Sul, Brazil. The study consisted of four experiments conducted on a typic Hapludox under NTS. The experiment was arranged in a randomized block design with three replications. Experiments I and II were carried out on soils with a satisfactory chemical soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Base saturation; Al saturation; Root zone; Grain yield. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100530 |
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| Nicoloso,Rodrigo da Silveira; Bayer,Cimélio; Denega,Genuir Luis; Oliveira,Paulo Armando Victória de; Higarashi,Martha Mayumi; Corrêa,Juliano Corulli; Lopes,Letícia dos Santos. |
| Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, respectively) with GC results. However, CH4 measurements were significantly affected by air sample moisture which interfered on CH4 detection by PAS. Overestimation of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Conventional tillage; Cover crops; INNOVA 1412. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000200012 |
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| Feddern,Vivian; Prá,Marina Celant De; Mores,Rúbia; Nicoloso,Rodrigo da Silveira; Coldebella,Arlei; Abreu,Paulo Giovanni de. |
| ABSTRACT Eggs are one of nearly perfect protein foods, offering nutrients of great biological value. However, during storage, egg albumen and yolk components may alter and deteriorate egg quality. Therefore, the aim of this work was to assess egg quality during 9-week storage. Parameters such as Haugh unit, weight loss, egg width and length, specific gravity, yolk and albumen dimensions and their pH were evaluated weekly. A total of 270 eggs (n=5) collected from two different hen strains were evaluated under room (20 to 35 °C in summer; 11.2 to 29.7 °C in autumn) and refrigerated (0 to 5 °C in summer; -3.1 to 6.5 °C in autumn) temperatures. For storage time, an unfolding analysis was accomplished by regression analysis using orthogonal polynomials. As a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weight loss; Shell color; Haugh unit; Yolk index.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300322 |
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| Registros recuperados: 19 | |
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