Consulta: subjectFacets:"No-tillage system"
Registros recuperados: 36
Data/hora: 13/06/2024 05:11:28

DECOMPOSITION OF THE REMAINING STRAW DURING SOYBEAN GROWING IN THE MIDWESTERN PARANÁ, BRAZIL
Provedor de dados: 196
Autores: Wenneck, Gustavo Soares; Saath, Reni; Araujo, Larissa Leite de; Pereira, Gustavo Lopes; Rezende, Roberto; Wenneck, Guilherme Soares.
Crop biomass plays an important role, especially in tropical and subtropical crops that adopt the no-tillage system, whose decomposition is related to material composition and environmental conditions. The objective of this work was to analyze the decomposition of straw remaining from autumn/winter crops in the development of soybean in succession in the Midwest region of Paraná. The experiment was conducted between 2019 and 2021 in a completely randomized design, with eight treatments (spontaneous, black oat, brachiaria, corn, wheat, oilseed radish, corn + brachiaria, and black oat + oilseed radish) and four replications. After autumn/winter cultivation, biomass samples were dried and placed in nylon bags, returning to the original plot during soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land cover; Organic matter; No-tillage system; Cobertura de solo; Matéria orgânica; Sistema plantio direto.
Ano: 2021
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6534

Efficiency of pneumatic and horizontal perforated disk meter mechanism in corn no-tillage seeders in soil with different mobilization reports
Provedor de dados: 70
Autores: Mahl,Denise; Furlani,Carlos E. A.; Gamero,Carlos A.
This work objectified to evaluate the efficiency of two meter mechanism of corn seeds when submitted to different forward speed and soil management system during the non-tillage seeding. It was used a factorial design in randomized blocks. The factors whose effects were examined were related to the seeders with pneumatic and horizontal disk meter mechanisms for the distribution of the seeds, to the set tractor-seeder forward speeds (4.4; 8.0 and 9.8 km h-1), and to the soil management system considering the corn no-tillage seeding over minimum tillage with chisel plow and the no-tillage system for the seeding of oat culture (Avena strigosa Schreb). It was verified that the forward speed didn't influence the initial and final stands of plants but it...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Precision of distribution seeds; Forward speed; No-tillage system.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162008000300014

Sistema plantio direto de cana-de-açúcar no Cerrado.
Provedor de dados: 14
Autores: SANTOS JUNIOR, J. de D. G. dos; SA, M. A. C. de; OLIVEIRA, C. M. de; FRANZ, C. A. B.; REIN, T. A.; SOUSA, D. M. G. de.
bitstream/item/131276/1/cirtec-30.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Goiás; Cana-de-açúcar; Agroenergia; Brasil; Savanna; No-tillage system; Stalk yield.; Plantio direto; Produtividade; Colheita mecânica; Compactação do solo; Cerrado; Saccharum Officinarum.; Brazil; Bioenergy; Soil compaction; Sugarcane.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1026353

Gradiente de concentração de nutrientes no perfil e acidez em subsuperfície do solo sob sistema plantio direto consolidado: o que fazer?
Provedor de dados: 14
Autores: DE BONA, F. D.
Resumo: O surgimento de alterações químicas como o gradiente de concentração de nutrientes e a acidez em subsuperfície de solos manejados a médio ou longo tempo sob sistema plantio direto tem causado preocupação aos técnicos e produtores rurais. O presente trabalho objetivou avaliar a ação de práticas químicas e mecânicas visando homogeneizar a distribuição de macronutrientes e a correção da acidez no perfil do solo conduzido sob sistema plantio direto consolidado. Os tratamentos experimentais foram constituídos por uma combinação de práticas de natureza mecânica (aração, gradagem e escarificação) e química (calagem, adubação fosfatada e gessagem) em área de lavoura que estava sob sistema plantio direto há 24 anos. Os gradientes de acidez e de concentração...
Tipo: Folhetos
Palavras-chave: Sistema plantio direto; No-tillage system; Fertilizing; Maize.; Fertilidade do Solo; Adubação; Manejo do Solo; Soja.; Milho; Trigo; Soil fertility; Soil management; No-tillage; Soybeans; Wheat.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1139941

Wheat yield in the Cerrado as affected by nitrogen fertilization and inoculation with Azospirillum brasilense
Provedor de dados: 86
Autores: Galindo,Fernando Shintate; Teixeira Filho,Marcelo Carvalho Minhoto; Buzetti,Salatiér; Santini,José Mateus Kondo; Alves,Cleiton José; Ludkiewicz,Mariana Gaioto Ziolkowski.
Abstract: The objective of this work was to evaluate the effect of inoculation with Azospirillum brasilense, associated with N rates and sources, in soil of the Cerrado (Brazilian savanna), on the grain yield of irrigated wheat (Triticum aestivum). The experiment was carried out under a no-tillage system in a Typic Haplustox. The experimental design was randomized complete blocks with four replicates, in a 2x5x2 factorial arrangement: two N sources (urea and urea with NBPT urease inhibitor); five N rates applied as topdressing (0, 50, 100, 150, and 200 kg ha-1); and with or without seed inoculation with A.brasilense. The increase in the N rates positively affected spike length, number of spikelets and of grains per spike, number of spikes per meter, N...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Biological nitrogen fixation; Nitrogen sources; No-tillage system; Urease inhibitor.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900794

Influence of ryegrass managements on the physical properties of a Haplohumox
Provedor de dados: 86
Autores: 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

Soil physical and biological properties in an integrated crop-livestock system in the Brazilian Cerrado
Provedor de dados: 86
Autores: Bonetti,João de Andrade; Paulino,Helder Barbosa; Souza,Edicarlos Damacena de; Carneiro,Marco Aurélio Carbone; Caetano,Jeander Oliveira.
Abstract: The objective of this work was to evaluate the soil physical and biological properties in an integrated crop-livestock system (ICLS), with or without cattle grazing, in different seasons. The experiment was carried out in the Cerrado biome, in Brazil, in a Rhodic Eutrudox. The treatments consisted of grazing areas (Urochloa ruziziensis) at 0.25, 0.35, and 0.45 m heights (with soybean cultivation after grazing) and of nongrazed areas. The ICLS had no negative effects on soil bulk density, total porosity, macroporosity, and microporosity. After ICLS implementation, the values of soil bulk density decreased, and those of soil macroporosity increased, in the grazed and nongrazed areas. However, after three years, bulk density and macroporosity were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal traffic; No-tillage system; Soil aggregation; Soil compaction; Soil microbial biomass; Soil quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101239

Soil management systems and their effect on the weed seed bank
Provedor de dados: 86
Autores: Forte,Cesar Tiago; Galon,Leandro; Beutler,Amauri Nelson; Basso,Felipe José Menin; Nonemacher,Felipe; Reichert Júnior,Francisco Wilson; Perin,Gismael Francisco; Tironi,Siumar Pedro.
Abstract: The objective of this work was to evaluate the density and composition of the soil weed seed bank when bean, corn, and soybean are cultivated in the no-tillage system (NTS) in rotation with winter cover crop species and in the conventional tillage system (CTS). The experiment was installed in a complete randomized block design with three replicates. The evaluation of the seed bank was performed on soil samples (0-10 and 10-20 cm) in four points of each experimental unit, at 15, 30, 60, and 90 days of cultivation. Bean, corn, and soybean crops were sown in the NTS with different soil cover crops in rotation, as well as in the CTS. The NTS provided a more dense and abundant soil seed bank of the species Gnaphalium spicatum and Oxalis corniculata...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena strigosa; Raphanus sativus; Vicia sativa; Conventional tillage system; No-tillage system.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400435

Thermo-physical-hydraulic variables in a no-tillage system related to wheeled traffic and furrow-opening mechanisms
Provedor de dados: 86
Autores: Zulpo,Lucas; Kerpen,Hyran Stefanowski; Fink,Jefferson Antonio; Mazurana,Michael; Levien,Renato.
Abstract: The objective of this work was to evaluate the impact of different furrow-opening mechanisms on soil physical characteristics, such as mobilization, porosity, bulk density, and the dynamics of water content and temperature in the sowing groove, as well as the influence of wheeled traffic and of these variables on corn (Zea mays) productivity. The experiment was conducted at the agronomic experimental station of Universidade Federal do Rio Grande do Sul on a Argissolo Vermelho (red Ultisol). Treatments consisted of three winter cover crops and of two types of furrow-opening mechanisms for fertilization (shank and disk), with or without tractor traffic. Corn was planted as the summer crop, and soil mobilization in the sowing groove, soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; No-tillage system; Furrow-opening mechanisms; Soil compaction; Soil temperature.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103804

Chemical attributes of a Hapludox soil after nine years of pig slurry application
Provedor de dados: 86
Autores: Veiga,Milton da; Pandolfo,Carla Maria; Balbinot Junior,Alvadi Antonio; Spagnollo,Evandro.
The objective of this study was to evaluate the pig slurry application effects on chemical attributes of a Hapludox soil managed under no-tillage system. Treatments consisted of 50, 100 and 200 m³ ha-1 per year of pig slurry application, and a control with replacement of P and K exported through harvested grains. Attributes related to soil chemical reaction, exchange complex, and nutrient contents were determined in soil samples collected in the ninth year of experimentation from 0 - 0.025, 0.025 - 0.05, 0.05 - 0.10, 0.10 - 0.20, 0.20 - 0.40 and 0.40 - 0.60 m soil depths. The continuous application of high doses of pig slurry on the Oxisol surface under no-tillage acidifies the soil and increases Al, P, Cu, and Zn contents down to 0.2-m depth, and K levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acidification; Micronutrients; No-tillage system; Soil fertility; Soil pollution; Soil quality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200013

Productivity, Control, and Decomposition of Irrigated Forage Species under Glyphosate Doses and Shading
Provedor de dados: 87
Autores: BRANT,M.C.; TUFFI SANTOS,L.D.; FREITAS,I.C.; FRAZÃO,L.A.; SILVA,M.S.N.; MACHADO,V.D.; SANTOS,M.V.
ABSTRACT: Light intensity available in growing environments may influence the susceptibility of plants to glyphosate and decomposition of their residues. This study aimed to assess the productivity, control, and decomposition of forage straw submitted to glyphosate doses and exposed to full sun and 50% shade. Two experiments were carried out, one for Piatã grass (Urochloa brizantha cv. Piatã) and other for Tanzania grass (Megathyrsus maximus cv. Tanzania). The experimental design was a randomized block design with strip-plot and four replications. Two growing environments (at full sun and under 50% shade) were installed in strips in the growing area, combined with six doses of glyphosate (0, 360, 720, 1,080, 1,440, and 1,800 g a.e. ha-1) used for forage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop-livestock-forest integration system; No-tillage system; Post-emergence desiccation; Luminous intensity; Urochloa; Megathyrsus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100329

Physical quality of a yellow latossol under integrated crop-livestock system
Provedor de dados: 90
Autores: Araújo,Fernando Silva; Salviano,Adeodato Ari Cavalcante; Leite,Luiz Fernando Carvalho; Souza,Zigomar Menezes de; Sousa,Allan Charlles Mendes de.
Soil physical quality is essential to global sustainability of agroecosystems, once it is related to processes that are essential to agricultural crop development. This study aimed to evaluate physical attributes of a Yellow Latossol under different management systems in the savanna area in the state of Piaui. This study was developed in Uruçuí southwest of the state of Piauí. Three systems of soil management were studied: an area under conventional tillage (CT) with disk plowi and heavy harrow and soybean crop; an area under no-tillage with soybean-maize rotation and millet as cover crop (NT + M); two areas under Integrated Crop-Livestock System, with five-month pasture grazing and soybean cultivation and then continuous pasture grazing (ICL + S and ICL +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Soil compaction; Animal trampling; Pasture grazing.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300013

MODELING OF SOIL LOAD-BEARING CAPACITY AS A FUNCTION OF SOIL MECHANICAL RESISTANCE TO PENETRATION
Provedor de dados: 90
Autores: Ortigara,Cícero; Moraes,Moacir Tuzzin de; Debiasi,Henrique; Silva,Vanderlei Rodrigues da; Franchini,Julio Cezar; Luz,Felipe Bonini da.
Estimation of soil load-bearing capacity from mathematical models that relate preconsolidation pressure (σp) to mechanical resistance to penetration (PR) and gravimetric soil water content (U) is important for defining strategies to prevent compaction of agricultural soils. Our objective was therefore to model the σp and compression index (CI) according to the PR (with an impact penetrometer in the field and a static penetrometer inserted at a constant rate in the laboratory) and U in a Rhodic Eutrudox. The experiment consisted of six treatments: no-tillage system (NT); NT with chiseling; and NT with additional compaction by combine traffic (passing 4, 8, 10, and 20 times). Soil bulk density, total porosity, PR (in field and laboratory measurements), U,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhodic Eutrudox; No-tillage system; Machinery traffic; Soil compaction.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401036

Available content, surface runoff and leaching of phosphorus forms in a typic hapludalf treated with organic and mineral nutrient sources
Provedor de dados: 90
Autores: Lourenzi,Cledimar Rogério; Ceretta,Carlos Alberto; Cerini,Jackson Berticelli; Ferreira,Paulo Ademar Avelar; Lorensini,Felipe; Girotto,Eduardo; Tiecher,Tadeu Luis; Schapanski,Dênis Eduardo; Brunetto,Gustavo.
The application of animal manure to soil can increase phosphorus availability to plants and enhance transfer of the nutrient solution drained from the soil surface or leached into the soil profile. The aim of this study was to evaluate the effect of successive applications of organic and mineral nutrient sources on the available content, surface runoff and leaching of P forms in a Typic Hapludalf in no-tillage systems. Experiment 1 was set up in 2004 in the experimental area of UFSM, in Santa Maria (RS, Brazil). The treatments consisted of: control (without nutrient application) and application of pig slurry (PS), pig deep-litter (PL), cattle slurry (CS), and mineral fertilizers (NPK). The rates were determined to meet the N crop requirements of no-tillage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic waste; Nutrient release; Environmental contamination; No-tillage system.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200019

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense
Provedor de dados: 90
Autores: Galindo,Fernando Shintate; Teixeira Filho,Marcelo Carvalho Minhoto; Buzetti,Salatiér; Santini,José Mateus Kondo; Alves,Cleiton José; Nogueira,Lais Meneghini; Ludkiewicz,Mariana Gaioto Ziolkowski; Andreotti,Marcelo; Bellotte,João Leonardo Miranda.
ABSTRACT The biological nitrogen fixation (BNF) process in grasses is caused by diazotrophic bacteria, particularly Azospirillum brasilense. However, studies are lacking on BNF efficiency to define how much mineral nitrogen (N) can be applied to achieve more sustainable high yields. Furthermore, there should be an analysis of whether urea with the urease enzyme inhibitor NBPT is less harmful, benefiting BNF in grasses. The objective of this study was to evaluate the effect of N sources and N rates associated with inoculation with Azospirillum brasilense regarding foliar diagnosis and leaf chlorophyll index (LCI), agronomic efficiency (AE), and corn grain yield in the Cerrado (Brazilian tropical savanna) region. The experiment was conducted in a no-tillage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Urease inhibitor; Nitrogen rates; BNF; No-tillage system.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100526

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality
Provedor de dados: 90
Autores: Pereira,Francisco Cézar Belchor Lages; Mello,Luiz Malcolm Mano de; Pariz,Cristiano Magalhães; Mendonça,Veridiana Zocoler de; Yano,Élcio Hiroyoshi; Miranda,Elka Elice Vasco de; Crusciol,Carlos Alexandre Costa.
ABSTRACT Autumn maize intercropped with tropical forages can raise the amount of crop residues and improve nutrient cycling, favoring subsequent soybean crop. The objective of this study was to evaluate the effect of forms of implementation of intercropping of irrigated autumn maize with tropical forages on yield, decomposition, nutrient accumulation and release, and on the ratio of lignin/total N of forage residues, yield components, and grain yield of subsequent soybean, and on soil physical and chemical properties, under no-tillage in lowland Cerrado. The experiment was arranged in randomized blocks in a factorial (4 × 3 + 1) design with one control and four replications. The treatments consisted of four forages: Palisade grass, Congo grass, and two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lowland Cerrado; No-tillage system; Crop residues; Panicum; Urochloa.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100518

Physical properties and particle-size fractions of soil organic matter in crop-livestock integration
Provedor de dados: 90
Autores: Tirloni,Carolina; Vitorino,Antonio Carlos Tadeu; Bergamin,Anderson Cristian; Souza,Luiz Carlos Ferreira de.
Crop-livestock integration represents an interesting alternative of soil management, especially in regions where the maintenance of cover crops in no-tillage systems is difficult. The objective of this study was to evaluate soil physical and chemical properties, based on the hypothesis that a well-managed crop-livestock integration system improves the soil quality and stabilizes the system. The experiment was set up in a completely randomized design, with five replications. The treatments were arranged in a 6 x 4 factorial design, to assess five crop rotation systems in crop-livestock integration, and native forest as reference of soil undisturbed by agriculture, in four layers (0.0-0.05; 0.05-0.10; 0.10-0.15 and 0.15-0.20 m). The crop rotation systems in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop rotation; No-tillage system; Soil quality; Soil carbon; Aggregate stability.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400024

Liming in Agricultural Production Models with and Without the Adoption of Crop-Livestock Integration
Provedor de dados: 90
Autores: Silva,Francisco Carlos Mainardes da; Sachs,Luís Guilherme; and,Inês Cristina Batista Fonseca; Tavares Filho,João.
ABSTRACT Perennial forage crops used in crop-livestock integration (CLI) are able to accumulate large amounts of straw on the soil surface in no-tillage system (NTS). In addition, they can potentially produce large amounts of soluble organic compounds that help improving the efficiency of liming in the subsurface, which favors root growth, thus reducing the risks of loss in yield during dry spells and the harmful effects of “overliming”. The aim of this study was to test the effects of liming on two models of agricultural production, with and without crop-livestock integration, for 2 years. Thus, an experiment was conducted in a Latossolo Vermelho (Oxisol) with a very clayey texture located in an agricultural area under the NTS in Bandeirantes, PR, Brazil....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria ruziziensis; No-tillage system; Ion mobility.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501463

Straw decomposition of nitrogen-fertilized grasses intercropped with irrigated maize in an integrated crop-livestock system
Provedor de dados: 90
Autores: Pariz,Cristiano Magalhães; Andreotti,Marcelo; Buzetti,Salatiér; Bergamaschine,Antonio Fernando; Ulian,Nelson de Araújo; Furlan,Luciano Coletti; Meirelles,Paulo Roberto de Lima; Cavasano,Francielli Aparecida.
The greatest limitation to the sustainability of no-till systems in Cerrado environments is the low quantity and rapid decomposition of straw left on the soil surface between fall and spring, due to water deficit and high temperatures. In the 2008/2009 growing season, in an area under center pivot irrigation in Selvíria, State of Mato Grosso do Sul, Brazil, this study evaluated the lignin/total N ratio of grass dry matter , and N, P and K deposition on the soil surface and decomposition of straw of Panicum maximum cv. Tanzânia, P. maximum cv. Mombaça, Brachiaria. brizantha cv. Marandu and B. ruziziensis, and the influence of N fertilization in winter/spring grown intercropped with maize, on a dystroferric Red Latosol (Oxisol). The experiment was arranged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria; Panicum maximum; Lignin/N ratio; No-tillage system; Zea mays L.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600019

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System
Provedor de dados: 90
Autores: Nascente,Adriano Stephan; Li,Yuncong; Crusciol,Carlos Alexandre Costa.
Soil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Brachiaria ruziziensis; No-tillage system; Panicum maximum; Pennisetum glaucum; Soil management.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300871

Management Systems Effect on Fertility Indicators of a Ferralsol with Vegetable Crops, as Determined by Different Statistical Tools
Provedor de dados: 90
Autores: Lima,Carlos Eduardo Pacheco; Silva,Juscimar da; Guedes,Ítalo Moraes Rocha; Madeira,Nuno Rodrigo; Fontenelle,Mariana Rodrigues.
ABSTRACT The intensive nature of soil use in vegetable production areas has led to a marked decrease in soil quality. The objective of this study was to evaluate the effects of adoption of soil management systems on vegetable production with regards to the chemical properties of a Rhodic Ferralsol after five years and to evaluate the use of the Principal Component Analysis (PCA) statistical tool in discriminating the different treatments. The experiment was conducted under field conditions in central Brazil in a randomized block design with four replications and a 3 × 2 factorial arrangement (three soil management systems × two cover crops). The soil management systems used were NT (no-tillage), RT (reduced tillage), and CT (conventional tillage). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Reduced tillage system; Conventional tillage system; Principal component analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100527

COMPRESSIBLITY AND PENETRABILITY OF LATOSSOLO VERMELHO-AMARELO DISTRÓFICO (OXISOL) UNDER VARIED MANAGEMENT SYSTEMS AND LAND USES
Provedor de dados: 90
Autores: Neiva Júnior,Eudes; Rocha,Wellington Willian; Pires,Bruno Silva; Farnezi,Múcio Mágno de Melo; Dias Junior,Moacir de Souza; Freitas,Danilo Fernandes Borges de; Silva,Enilson de Barros; Carvalho,Gianniini Alexsandra de Oliveira.
Soil compaction is one of the main degradation causes, provoked by inappropriate agricultural practices that override the limitations of the soil physical properties. Preconsolidation pressure and penetration resistance have proved effective as alternative to assess and identify soil compaction. Based on the interpretation of these physico-mechanical parameters, compaction can be prevented with a better adjusted soil management. This study was performed to generate preconsolidation pressure and penetration resistance models for Latososlo Vermelho-Amarelo distrófico (Oxisol) under various managements and uses; and evaluate which of these would lead to degradation or degradation susceptibility. The study was carried out in Curvelo, MG. Two managements and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil compaction; Sheep grazing; No-tillage system; Atlantic rainforest.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100086

Upland rice yield as affected by Brachiaria coverage management
Provedor de dados: 91
Autores: Nascente,Adriano S.; Stone,Luís F.; Guimarães,Cleber M.
An important point in no-tillage system is the time between cover crop glyphosate desiccation and rice sowing. This study aimed to verify the effect of Brachiaria ruziziensis management time before rice sowing on rice yield and its components. The experiment was conducted under greenhouse conditions and consisted of four types of B. ruziziensis management: with Brachiaria and with herbicide (WBWH), without Brachiaria shoots and with herbicide (NBWH), without Brachiaria shoots and without herbicide (NBNH), and with Brachiaria and without herbicide (WBNH), at four times: 30, 20, 10, and 0 days, preceding the rice sowing. The amount of B. ruziziensis dry matter increased as the management was done closer to the rice sowing date. The WBWH and WBNH managements...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; No-tillage system; Glyphosate; Cover crop.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000100015

Grain yield of corn at different population densities and intercropped with forages
Provedor de dados: 91
Autores: Nascimento,José M. do; Furlani,Carlos E. A.; Chioderoli,Carlos A.; Queiroz,Renata F. de; Bertonha,Rafael S.; Cavichioli,Fabio A.
ABSTRACT The no-tillage system optimizes agricultural areas, maintaining the supply of straw and promoting crop rotation and soil conservation. The aim of the present study was to evaluate sowing quality and grain yield of corn intercropped with three forage species of the Urochloa genus associated with two corn population densities. The experiment was conducted at the São Paulo State University (UNESP), in Jaboticabal-SP, Brazil. The experimental design was randomized blocks in a 2 x 3 factorial scheme with four replicates. The treatments consisted of two corn densities (55,000 and 75,000 plants ha-1) intercropped with three forages (Urochloa brizantha, Urochloa decumbens and Urochloa ruziziensis) sown between rows of corn in the V4 stage. The following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Crop-livestock integration; Crop rotation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201143

Yield, chemical composition and chlorophyll relative content of Tanzania and Mombaça grasses irrigated and fertilized with nitrogen after corn intercropping
Provedor de dados: 96
Autores: Pariz,C.M.; Andreotti,M.; Bergamaschine,A.F.; Buzetti,S.; Costa,N.R.; Cavallini,M.C.; Ulian,N.A.; Luiggi,F.G.
It was evaluated the effect of the absence and of application of three nitrogen doses (50, 100 and 200 kg ha-1of N) and four harvest times in the winter/spring season (from July to October) on dry mass yield (DMY), on the relative chlorophyll contents (ICF _ leaf chlorophyll index) and on the contents of total digestible nutrients (TDN), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin, and their respective correlations on Tanzania and Mombaça grasses after intercrop with corn in distroferric red latosol (Oxisol) soil as well. It was used a random block design, in split-plot with four replicates. The greatest DMY occured with the increase of photoperiod (from August), neverthless responses to nitrogen fertilization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop-livestock integration; Crude protein; Megathyrsus maximum; Neutral and acid detergent fiber; No-tillage system; Total digestible nutrients.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000400005

Soybean performance as affected by desiccation time of Urochloa ruziziensis and grazing pressures
Provedor de dados: 124
Autores: Franchini,Julio Cezar; Balbinot Junior,Alvadi Antonio; Debiasi,Henrique; Conte,Osmar.
Integrated crop-livestock farming system have demonstrated various economic and environmental advantages. However, there is lack of information on the effects of different desiccation times of Urochloa ruziziensis and grazing pressures on the soybean performance. This study aimed to evaluate the performance of three soybean cultivars, sown after different desiccation times of U. ruziziensis grazed at three heights during the 2012/13 growing season, in southern Brazil. The U. ruziziensis were continuously grazed for 6 months by 6, 4 and 2 animal units (AU) per hectare, leading to average pasture heights of 15; 35; and 50 cm, respectively. Each pasture height constituted a different experiment. The experiments were laid out using randomized complete block...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Crop-livestock system; No-tillage system; Straw mass.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500015

Soil fertility status, carbon and nitrogen stocks under cover crops and tillage regimes
Provedor de dados: 124
Autores: Carvalho,Arminda Moreira de; Marchão,Robélio Leandro; Souza,Kleberson Worslley; Bustamante,Mercedes Maria da Cunha.
The aim of the present study was to evaluate the effects of cover crops on the soil's chemical fertility, in particular its carbon and nitrogen content, in a Typic Acrustox under conventional and no-tillage corn systems. We hypothesized that the no-tillage system associates with cover crops maintains or increases soil carbon and nitrogen stocks and enhance soil fertility. The no-tillage system did not present higher carbon and nitrogen stocks than conventional tillage, but resulted in higher concentrations of exchangeable bases, higher CEC, and higher base saturation in the surface soil layer, mainly under use of Canavalia brasiliensis. Carbon and nitrogen stocks (up to 40 cm depth) differ significantly between the different cover crop species. The use of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian Cerrado; No-tillage system; Ecological intensification; Low carbon agriculture.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500007

Use of walking tractor powered rotary tiller in no-tillage system1
Provedor de dados: 124
Autores: Medeiros,Fabricio Ardais; Reis,Ângelo Viera dos; Machado,Antonio Lilles Tavares; Machado,Roberto Lilles Tavares; Stefanello,Giusepe.
Brazilian family farming has at its disposal planters whose furrowing mechanisms, whether disc or shank, require a large vertical force. In smaller planters, this is reflected in low efficiency when opening the furrow or in a high demand for mass (weight). Rotary furrowers require less vertical force for the same operation. This study aimed to evaluate the technical feasibility and performance of rotary furrowers mounted on the powertrain of a walking tractor working under direct seeding, and compare them with shank-type furrowers using bibliographic data. The parameters used in the comparison were the depth and width of the furrow, the area of disturbed soil and the cross-sectional area of the furrow with no soil after the operation. The experiment was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed furrow; Sowing depth; No-tillage system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100054

Lime and gypsum application on the wheat crop
Provedor de dados: 63
Autores: 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

Nitrogênio em cobertura e molibdênio foliar no feijoeiro de inverno - DOI: 10.4025/actasciagron.v32i1.1605
Provedor de dados: 1
Autores: Barbosa, Giselle Feliciani; UNESP; Arf, Orivaldo; UNESP; Nascimento, Martha Santana do; UNESP; Buzetti, Salatiér; UNESP; Freddi, Onã da Silva; UNESP.
Mesmo sendo uma planta capaz de realizar a fixação de nitrogênio em simbiose com o Rhizobium, várias pesquisas mostram que a fixação não supre as necessidades do feijoeiro em relação a esse nutriente. A aplicação de molibdênio visa melhorar a simbiose Rhizobium-feijoeiro, pela importância no metabolismo desse nutriente, e pode, com isso, diminuir a aplicação de fertilizantes nitrogenados. Assim, o objetivo do trabalho foi avaliar a resposta do feijão de inverno irrigado, em sistema plantio direto, a doses crescentes de nitrogênio em cobertura (zero, 30, 60, 90 e 120 kg há-1) e sua interação com a adubação molíbdica foliar (zero e 80 g há-1). O delineamento experimental foi o de blocos casualizados dispostos em esquema fatorial 5 x 2, com quatro repetições....
Palavras-chave: 5.01.00.00-9    Agronomia Phaseolus vulgaris L.; Adubação; Plantio direto Fitotecnia Phaseolus vulgaris L.; Fertilization; No-tillage system.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1605

Distribuição dos agregados e carbono orgânico influenciados por manejos agroecológicos - DOI: 10.4025/actasciagron.v31i3.322
Provedor de dados: 1
Autores: Loss, Arcângelo; UFRRJ - Seropédica; Pereira, Marcos Gervasio; UFRRJ - Seropédica; Schultz, Nivaldo; UFRRJ - Seropedica; Ferreira, Edilene Pereira; UFRRJ - Seropédica; Silva, Eliane Maria Ribeiro da; Embrapa - Seropédica; Beutler, Sidinei Julio; UFRRJ - Seropédica.
O objetivo deste estudo foi verificar a influência do manejo agroecológico na distribuição dos agregados estáveis em água e no teor de carbono orgânico dos agregados em diferentes coberturas vegetais. Foram selecionadas cinco áreas, a saber: sistema agroflorestal; cultivo de figo (Ficus carica L.); consórcio maracujá (Passiflora edulis S.)–Desmodium sp.; cultivo de feijão (Phaseolus vulgaris L.), em manejo convencional, e cultivo de milho (Zea mays L.), em plantio direto. Em cada área, foram coletadas amostras de terra indeformadas, nas profundidades de 0 - 5 e 5 - 10 cm, e avaliada a estabilidade dos agregados e o teor de carbono orgânico nos agregados (COAGR). A maior massa de agregados encontra-se na classe de 2,00 mm, em ambas as profundidades, com...
Palavras-chave: 5.01.00.00-9    Agronomia agregação; Resíduos vegetais; Plantio direto; Adubação verde aggregation; Vegetable residues; No-tillage system; Green manuring.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/322

Energy performance of sugarcane potential ethanol production under different management systems
Provedor de dados: 111
Autores: Wei, Marcelo Chan Fu; Romanelli, Thiago Libório; Molin, José Paulo.
Crop rotation with leguminous species in sugarcane cultivation is increasing in the southeastern regions of Brazil. Studies on sugarcane ethanol production rely basically at the economic and sustainable points of view overlooking the energy analysis. This study aimed to evaluate the sugarcane ethanol yield under no-tillage and conventional systems with different green manure treatments using a published dataset at the energy point of view. Analysis of energy efficiency was carried out using the indicators: energy balance (EB), energy return over investment (EROI) and Energy Intensity (EI). Energy balance ranged from 129.78 GJ ha-1 to 216.92 GJ ha-1, with no-tillage system presenting the highest values of EB. EROI presented the highest values (334.19,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conventional system; Energy balance; Energy return over investment; Ethanol; No-tillage system.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5973

Surface and incorporated liming effects on clay dispersion, water availability, and aeration capacity of a Dystrudept soil
Provedor de dados: 53
Autores: Auler,André Carlos; Pires,Luiz Fernando; Caires,Eduardo Fávero.
ABSTRACT Liming represents a management procedure that can affect the soil structure and its thermodynamic processes. In this context, the aims of this study were to assess (i) the effects of the surface and incorporated liming on the clay dispersion, soil water availability, and aeration capacity; (ii) the influence of soil chemical alterations in its physical attributes. For this, a field experiment was installed in a family farming property, located in the southeastern region of the State of Paraná, in a Dystrudept soil. The treatments were 3 application modes (on the surface, incorporated via plowing and incorporated via subsoiling and harrowing), with and without 15 Mg∙ha–1 of lime, aiming to increase the base saturation in the topsoil (0 – 0.20 m) to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water field capacity; Soil acidity; Cation exchange capacity; No-tillage system.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300433

Variation on the amount of winter cover crops residues on weeds incidence and soil seed bank during an agricultural year
Provedor de dados: 52
Autores: Mauli,Márcia Maria; Nóbrega,Lúcia Helena Pereira; Rosa,Danielle Medina; Lima,Gislaine Piccolo de; Ralish,Ricardo.
This study analyzed possible interferences associated to the amount of crop residues produced by the black oats and the consortium of black oats, common vetch and forage turnip on weeds incidence and soil seed bank. It was a field trial with seven treatments and five replications. The cover crop was sown at throwing, cut at 100 days and residues were put on each respective plot, using a proportion of normal amount of produced straw, either its half and double. The heaviest weights were obtained from cover crop consortium and their application decreased weeds incidence in such area. The seeds bank and other analyzed parameters did not show statistical differences. According to these results, it was concluded that winter cover crop could be used in crops...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Seeds bank; Weeds incidence.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400006

Tractor perfomance as a function of speed and seeder’s tire inflation pressure
Provedor de dados: 65
Autores: Furlani,Carlos Eduardo Angeli; Cortez,Jorge Wilson; Toledo,Anderson de; Silva,Rouverson Pereira da; Grotta,Danilo Cesar Checchio; Reis,Gustavo Naves dos.
The performance of agricultural tractors under field conditions results from the interaction between tire and wheel affected by displacement speed. This work was developed to assess the performance of an agricultural tractor under different seeder's tire inflation pressure (518; 483 and 414kPa) and in two different gears providing speeds of 3.0 and 6.0km h-1. The experiment was performed at Jaboticabal Campus of São Paulo State University (UNESP). The experimental design used was entirely randomized in a 2-factor factorial design (3x2) with four replications. The draft force was influenced by the gear as well as by the required power; however, tire inflation pressure in the seeder did not change these parameters. Also, fuel consumption was influenced only...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Fuel consumption; Slippage.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000800009

Production, carbon and nitrogen in stover fractions of corn ( Zea mays L.) in response to cultivar development
Provedor de dados: 64
Autores: Barbosa,Julierme Zimmer; Ferreira,Carla Fernanda; Santos,Nicolas Zendonadi dos; Motta,Antonio Carlos Vargas; Prior,Stephen; Gabardo,Juarez.
ABSTRACT Changes in quantity and quality of corn crop stover can have a large impact on soil conservation and soil carbon (C) sequestration over large areas. The aim of this study was to evaluate changes in production, concentration and amount of C and nitrogen (N) in corn stover fractions due to cultivar development. Two field experiments were conducted in the city of Rolândia (Paraná State, Brazil) using ten cultivars representing five technological levels: single cross hybrids, double or triple hybrids, commercial varieties, and creole cultivars. Plant heights and stalk, leaf, cob, husk and tassel weights were determined at final harvest. Elemental C and N analyses were performed in triplicate for each stover fraction. In general, the creole cultivars...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C/N ratio; Genetic breeding; No-tillage system; Integrated crop-livestock systems; Renewable energy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000600665