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| Registros recuperados: 13 | |
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| Pierri,Letícia de; Pauletti,Volnei; Barth,Gabriel; Motta,Antônio Carlos Vargas; Silva,Dimas Agostinho da; Roza,Luciano Antunes da; Saudade,Cesar Augusto Schmid. |
| ABSTRACT Residual biomass from grains has potential as an energetic source. Biomass composition determines this potential and is related to plant nutrition, which may vary according to soil fertility. The aim of this 23-year field study was to evaluate changes in chemical attributes of a Brazilian Oxisol and in the energetic potential of oat (Avena sativa L.) and soybean (Glycine max (L.) Merr) residual biomasses provided by tillage systems and fertilizer rates. The trial was performed since 1989, assessing soil chemical attributes in no-tillage (NT), conventional (CT), minimum (MT) and no-tillage plus chisel plough (NT+CP), with two fertilizer rates (normal and reduced, since 1994). Oat and soybean (2012/2013) residual biomasses were collected and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; No-tillage; Fertilization; Avena sativa L.; Glycine max (L.) Merr. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300454 |
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| Ambrosio,Rodrigo; Pauletti,Volnei; Barth,Gabriel; Povh,Fabrício Pinheiro; Silva,Dimas Agostinho da; Blum,Hilbert. |
| ABSTRACT Agricultural residual biomass is an important source of energy, and its production and quality vary according to the crop management. This study aimed to assess the effects of plant distribution and nitrogen fertilization on the energy production potential of the biomass of maize cultivated under no tillage. The field experiment was installed in southeast Brazil using five nitrogen rates (0, 60, 120, 180, and 240 kg ha-1) and two inter-row spacings (0.4 and 0.8 m). Grain yield, residual biomass productivity, and bioenergy potential in different parts of the plant (grain, stalk+leaf, husk, and cob) were assessed. No change in grain yield was observed using narrow row spacing. Stalk+leaf and husk productivity was higher using 0.8 m than using 0.4 m... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Renewable energy; Zea Mays (L.); Calorific value; Electricity; Macronutrients.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600626 |
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| Vizioli,Bruno; Cavalieri-Polizeli,Karina Maria Vieira; Barth,Gabriel. |
| Abstract: The objective of this work was to evaluate the influence of ryegrass (Lolium multiflorum) managements on the physical properties of a Haplohumox, and on the yields of corn and of ryegrass cultivated in succession to corn. The experiment was carried out in a randomized complete block design, with three treatments and three replicates, in which treatments were the different managements of ryegrass under no-tillage for silage, soil cover, and grazing. After nine years of management, samples were collected at 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30-m soil depths, to determine the following soil properties: texture, total organic carbon, soil bulk density, macroporosity, microporosity, total porosity, and resistance to root penetration. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium multiflorum; No-tillage system; Soil physical quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000800952 |
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| Rodrighero,Maik Barbosa; Barth,Gabriel; Caires,Eduardo Fávero. |
| RESUMO A correção da acidez do solo no sistema plantio direto (SPD) é feita por meio da aplicação de calcário na superfície sem incorporação. Com a hipótese de que a fonte e granulometria dos corretivos interferem na velocidade de reação no solo em curto prazo e na resposta das culturas à calagem na superfície em SPD, foram realizados dois experimentos, sendo um em Latossolo Vermelho Distrófico textura muito argilosa e outro em Neossolo Litólico Húmico textura franco-arenosa, no período de 2010 a 2012. O delineamento empregado, em cada experimento, foi em blocos completos ao acaso, no esquema fatorial 2 × 2 × 4, com três repetições. Os tratamentos foram constituídos de duas fontes de calcário, calcítico (25-50 g kg-1 MgO) e dolomítico (160-180 g kg-1 MgO),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acidez do solo; Alumínio; Cálcio; Reatividade do calcário; Poder relativo de neutralização total. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601723 |
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| Pauletti,Volnei; Pierri,Letícia de; Ranzan,Thiago; Barth,Gabriel; Motta,Antonio Carlos Vargas. |
| Os efeitos da calagem e da gessagem são amplamente conhecidos na literatura, mas a sua magnitude em relação aos efeitos no perfil do solo é dependente do tempo após a aplicação desses insumos. Dessa maneira, o objetivo deste trabalho foi avaliar em longo prazo a aplicação conjunta de gesso e calcário nos atributos químicos de um solo em rotação de culturas, no sistema de plantio direto. O experimento foi conduzido em uma propriedade rural no município de Jaguariaíva, PR, em um Latossolo Vermelho-Amarelo distrófico típico, de textura areia franca, durante os anos de 2002 a 2008. O experimento foi conduzido em blocos ao acaso sob esquema fatorial com 10 tratamentos, sendo cinco doses de gesso agrícola (0; 1,5; 3,0; 6,0; e 12,0 Mg ha-1) e duas doses de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lixiviação de íons; PH em profundidade; Déficit hídrico. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200014 |
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| Pereira,Bruno Fernando Faria; Rozane,Danilo Eduardo; Araújo,Suzana Romeiro; Barth,Gabriel; Queiroz,Rafaela Josemara Barbosa; Nogueira,Thiago Assis Rodrigues; Moraes,Milton Ferreira; Cabral,Cleusa Pereira; Boaretto,Antonio Enedi; Malavolta,Eurípedes. |
| Among the toxic elements, Cd has received considerable attention in view of its association with a number of human health problems. The objectives of this study were to evaluate the Cd availability and accumulation in soil, transfer rate and toxicity in lettuce and rice plants grown in a Cd-contaminated Typic Hapludox. Two simultaneous greenhouse experiments with lettuce and rice test plants were conducted in a randomized complete block design with four replications. The treatments consisted of four Cd rates (CdCl2), 0.0; 1.3; 3.0 and 6.0 mg kg-1, based on the guidelines recommended by the Environmental Agency of the State of São Paulo, Brazil (Cetesb). Higher Cd rates increased extractable Cd (using Mehlich-3, Mehlich-1 and DTPA chemical extractants) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa L.; Oryza sativa L.; Soil pollution; Chemical extractants; Heavy metals; Human health. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200033 |
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| Duarte,Aildson Pereira; Abreu,Mônica Ferreira de; Francisco,Eros Artur Bohac; Gitti,Douglas de Castilho; Barth,Gabriel; Kappes,Claudinei. |
| ABSTRACT: Unchanged reference values of grain nutrient contents for corn have been used for over 20 years, despite yield increases, the development of new hybrids, and modifications to cropping systems, especially the establishment of in-season second crops and the wide adoption of no-tillage. This study measured macro- and micronutrient contents in corn grains from different regions, in the first (summer) and second (fall) crop, to update the reference values of estimated nutrient removal. A secondary objective was to determine whether there were correlations between grain nutrient contents and grain yields and densities. In this study, 175 corn grain samples of experiments on cultivar evaluation and 22 samples from soil management trials from five states... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn grains; Mineral nutrient contents; Grain yield; Grain density. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100517 |
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| Auler,André Carlos; Miara,Simone; Pires,Luiz Fernando; Fonseca,Adriel Ferreira da; Barth,Gabriel. |
| Anthropic action, such as the soil use and management systems, promote changes in the soil structure. These changes might hamper the development of plants in soil management practices that involve its mobilization, and the negative effects might be increased due to intensive use. The aim of this study was to evaluate the physico-hydrical properties of a Haplohumox in integrated production systems under different soil managements. The soil superficial (0.0-0.10 m) and sub-superficial (0.10-0.20 m) layers were evaluated in the different systems: conventional tillage (CT), minimum tillage (MT), no-tillage (NT) and chiseled no-tillage (CNT), taking into consideration the annual ryegrass cropped for different uses [cover crop (C), grazing (G) and silage (S)]... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haplohumox; No-tillage; Soil physical quality; Crop-livestock integration; Agriculture sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500013 |
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| Barth,Gabriel; Otto,Rafael; Almeida,Risely Ferraz; Cardoso,Elke Jurandy Bran Nogueira; Cantarella,Heitor; Vitti,Godofredo Cesar. |
| ABSTRACT The use of nitrification inhibitors (NIs; dicyandiamide - DCD) is an alternative to reduce oxidation of ammonium (NH4+-N) to nitrate (NO3–-N) in the soil, reducing NO3–-N losses from fertilization practices. Based on the hypothesis that DCD reduces conversion of NH4+-N to NO3–-N in tropical soils and inhibits ammonia oxidizing microorganisms (AOM) abundance, soils from the Piracicaba region, São Paulo, with different textures (sand, loam and clay) were incubated with ammonium sulphate (AS) and DCD. Contents of NH4+-N, NO3–-N, soil pH, and AOM abundance were quantified periodically. Ammonium sulphate increased AOM abundance in all soils, but AS+DCD presented AOM abundances similar to the control. During 90 days of incubation, the effectiveness of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DCD; Nitrogen losses; Ammonium sulphate; Fertilizer. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401404 |
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| Caires,Eduardo Fávero; Feldhaus,Itacir Cesar; Barth,Gabriel; Garbuio,Fernando José. |
| Root growth and crop yield can be affected by chemical modifications of the soil profile owing to lime and gypsum applications. A field trial was carried out on a dystrophic Clayey Rhodic Hapludox at Ponta Grossa, PR, Brazil, aiming to evaluate lime (without or with incorporation into the soil) and gypsum effects on root growth, mineral nutrition and grain yield of wheat (cv. OR 1). A randomized complete block design was used, with three replications, in a split-plot experiment. Treatments with dolomitic limestone (without lime and 4.5 t ha-1 of lime applied on the surface, in total rate and 1/3 of the requirement per year during 3 years, or incorporated into the soil) were applied in July 1998 (main plots) and the rates of gypsum (0, 3, 6 and 9 t ha-1) in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Root growth; Calcium; Sulphur; No-tillage system. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200023 |
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| Caires,Eduardo Fávero; Barth,Gabriel; Garbuio,Fernando José; Churka,Susana. |
| The effects of soil chemical changes on soybean root growth, mineral nutrition and grain yield, as a result of surface application of lime under no-till (NT), are still under discussion. A field trial was carried out on a loamy dystrophic Typic Hapludox at Ponta Grossa, Paraná State, Brazil, using a completely randomized block design with three replicates, in a split-plot experiment. The main plots received four dolomitic lime rates applied on the surface (0, 2, 4, and 6 Mg ha-1) in July 1993. In the subplots, two dolomitic lime rates were reapplied on the surface (0 and 3 Mg ha-1) in June 2000. After nine years, liming increased pH, exchangeable Ca2+ and reduced exchangeable Al3+ as well as soil Al3+ saturation down to a 60 cm depth. Re-liming, after two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Acidity; Subsoil; Root system; Nutrient. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500013 |
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| Caires,Eduardo Fávero; Corrêa,José Cristovão Leal; Churka,Susana; Barth,Gabriel; Garbuio,Fernando José. |
| Crop root growth and grain yield can be affected by chemical modifications in the soil profile due to surface lime application. A field trial was carried out on a loamy dystrophic Typic Hapludox at Ponta Grossa, State of Paraná, Brazil, to evaluate root growth and grain yield of wheat (Triticum aestivum L. cv. CD 104, moderately susceptible to Al), about 10 years after surface liming (0, 2, 4, and 6 Mg ha-1) and three years after surface re-liming (0 and 3 Mg ha-1), in a long-term no-till cultivation system. Soil acidity limited wheat root growth and yield severely, probably as a result of extended water deficits during the vegetative stage. Surface liming caused increases up to 66% in the root growth (0-60 cm) and up to 140% in the grain yield. Root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Dolomitic lime; Aluminum; Calcium. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500013 |
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| Fonseca,Adriel Ferreira da; Caires,Eduardo Fávero; Barth,Gabriel. |
| Micronutrient availability can be affected by the increase of the soil pH due to surface liming. A field trial was carried out on a loamy, kaolinitic, thermic Typic Hapludox at Ponta Grossa, Paraná State, Brazil. The main objective was to evaluate the effects of surface liming and re-liming on the availability of micronutrients [copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn)] for wheat (Triticum aestivum L.) cropped under a no-till system. A randomized complete block design was used in a split-plot arrangement. The main plots received surface lime applications (2, 4, and 6 Mg ha-1) in July 1993. In the subplots, surface lime (3 Mg ha-1) was applied again in June 2000. In 2003, before the wheat sowing, soil samples were taken at 0-5, 5-10, and 10-20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L; Soil acidity; Dolomitic lime; Multinutrient extractants; Soil with variable charge. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100009 |
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| Registros recuperados: 13 | |
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