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| Registros recuperados: 78 | |
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| Pezzopane,José Ricardo Macedo; Bernardi,Alberto Carlos de Campos; Azenha,Mariana Vieira; Oliveira,Patricia Perondi Anchão; Bosi,Cristiam; Pedroso,André de Faria; Esteves,Sérgio Novita. |
| ABSTRACT This study aimed to evaluate the production characteristics of pastures in integrated livestock production systems. For that, an experiment was carried out in São Carlos, SP, Brazil, from 2013 to 2015. Forage development, production and nutritive value were evaluated in five beef cattle production systems: extensive continuous stocking (Urochloa decumbens) = EXT; intensive = INT; crop-livestock = iCL; livestock-forest = iLF and crop-livestock-forest = iCLF. Rotational stocking pastures in INT, iCL, iLF and iCLF systems were established with Urochloa brizantha cv. BRS Piatã. In iCL and iCLF, pastures were renovated by resowing the grass simultaneously with corn. In iLF and iCLF, eucalyptus (Eucalyptus urograndis clone GG100) was planted in Apr 2011... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Eucalyptus urograndis; Solar radiation; Competition; Sustainability. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000200402 |
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| Barbosa-Borges,Wander Luis; Dalto de Souza,Isabela Malaquias; Aparecida-Bazzo,Vanda. |
| Abstract Conservation management systems that have intended to prevent wear or soil degradation have been widespread in agriculture. The study was conducted in Site São Luiz at Simonsen district, Votuporanga, São Paulo State, in order to evaluate the chemical and physical changes in an area with agrosilvopastoral system and deployed with three soil management (treatments): Full (conventional tillage, liming and application of gypsum, phosphate and potassium); intermediate (no tillage, liming and application of gypsum at surface) and basic (no tillage and surface liming). The soil was managed in July 2009 and the planting of eucalyptus was realized in January 2010, on the terraces. Between the terraces it was cropped maize intercropped with Urochloa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corymbia citriodora; Eucalyptus urograndis; Integrated systems; Soil management; Urochloa brizantha. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100075 |
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| Marinho Lisboa,Fabrício. |
| Abstract The aim of this study was to evaluate the effects of burning and manual control of invasive species on a Latossolo Vermelho-Amarelo soil covered with Urochloa brizantha. Five soil samples were collected for pasture and forest, at 0-5 cm depth, to determine the accumulated respiration, microbial biomass carbon (MBC), mild organic matter, total organic carbon (TOC), water soluble carbon and MBC:TOC ratio. Three groups according soil grass coverage were selected: (1) group I with 33.5% of bare soil, (2) group 2 with 90% coverage and (3) group 3 with 53.4% coverage of invasive species. The highest value of TOC was found in forest (36.52 g/kg). The highest accumulative value of respiration in the soil was observed in group 3 (2.6 mg/kg) and the highest... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bare soil; Organic carbon; Urochloa brizantha; Weed. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000300389 |
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| Gorgone-Barbosa,Elizabeth; Daibes,Luís Felipe; Novaes,Rafael B.; Pivello,Vânia Regina; Fidelis,Alessandra. |
| ABSTRACT Fire-related cues may enhance seed recruitment in flammable ecosystems and differences in fire-germination responses of invasive vs. native species can drive the invasion process. We evaluated the effects of heat shock and smoke water solution treatment on seed germination of invasive (Melinis minutiflora, Urochloa decumbens, U. brizantha) and native grasses (Axonopus pressus, Aristida setifolia, Gymnopogon foliosus) of the Cerrado. The effect of fire temperature was tested by exposing seeds to heat shock treatments of 60, 100, and 200 °C for one minute, comparing them to untreated seeds. The effect of smoke was tested by soaking seeds for 24-h in an aqueous smoke comparing them to seeds soaked in distilled water. Differences among treatments were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: African grasses; Cerrado grasses; Fire temperature; Melinis minutiflora; Smoke solution; Urochloa brizantha; Urochloa decumbens. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100185 |
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| Costa, Joao Paulo Ramos; Caputti, Gregory de Paula; Galzerano, Leandro; Silva, Wilton Ladeira da; Ruggieri, Ana Cláudia; Malheiros, Euclides Braga. |
| The nutritional status of xaraes palisade grass with SPAD chlorophyll meter and the critical nitrogen sufficiency index (cNSI) in the dry and rainy seasons were assessed. The experiment was conducted in a completely randomized design with four treatments (50, 100, 200 and 400 kg N ha-1), three replicates and two seasons: dry and rainy. All variables had a high nonlinear relationship with their predictors (p < 0.001). Total nitrogen (TN) reached a plateau at doses 262.0 and 514.8 kg of N ha-1 and the concentration of TN in the plant was 1.88 and 1.93% respectively during the rainy and dry season. Relative chlorophyll content (RCC) reached a plateau at 46.05 and 53.65 SPAD units in the rainy and dry seasons, respectively. The production of dry matter (DM)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Urochloa brizantha; Chlorophyll meter; Nutritional status; SPAD.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/24854 |
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| Stumpf,Lizete; Pauletto,Eloy A.; Costa de-Castro,Rafaela; Spinelli-Pinto,Luiz F.; Fontana-Fernandes,Flavia; Stumpf da-Silva,Tiago; Vaz-Ambus,Jordano; Furtado-Garcia,Gabriel; Rodrigues de-Lima,Claudia L.; Nunes,Márcio R.. |
| Surface coal mining causes an intense topographic and hydrologic change in the area with suppression of local vegetation, degrading the environment. One main problem presented by the rehabilitated soil refers to physical disruption of the soil, which delays the regrowth of plant species in the mining area. The objective of this study was to evaluate the influence of four grass species in the retrieval of the rehabilitated soil's physical properties at a recovered coal mine area in Candiota, Rio Grande do Sul State, southern Brazil. With the data an ANOVA was performed and treatments means were compared using Tukey test (p ≤0.05). The treatments were: T1-Hemarthria altissima; T2-Paspalum notatum; T3-Cynodon dactylon; T4-Urochloa brizantha; a rehabilitated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hemarthria altissima; Paspalum notatum; Cynodon dactylon; Urochloa brizantha; Rehabilitated soils; Physical properties. |
| Ano: 2014 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000500002 |
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| Santiago-Ortega,Mario A.; Honorato-Salazar,José A.; Quero-Carrillo,Adrián R.; Hernández-Garay,Alfonso; López Castañeda,Cándido; López-Guerrero,Isaías. |
| Resumen La evaluación de pastos de crecimiento rápido y rendimiento alto de biomasa ha aumentado en el mundo porque son cultivos energéticos potenciales para producir bioetanol de segunda generación. En México se inician estudios en pastos con producción alta de biomasa para usarlos en la producción de biocombustibles. El objetivo de este estudio fue evaluar la biomasa de Urochloa brizantha cv. Toledo, como materia prima para la producción de bioetanol. La producción anual de biomasa, el poder calorífico, la composición química, el análisis inmediato y el rendimiento teórico de bioetanol se determinaron en seis frecuencias de corte (30, 60, 90, 120, 150 y 180 d después del rebrote). Los datos se analizaron mediante el procedimiento GLM (SAS) y las medias... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Bioetanol; Composición química; Análisis inmediato; Poder calorífico. |
| Ano: 2016 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952016000600711 |
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| Sousa,D.O.C.; Santos,M.E.R.; Fonseca,D.M.; Macedo Junior,G.L.; Silva,S.P.. |
| ABSTRACT The objective of this study was to evaluate the effects of Brachiaria brizantha cv. Marandu syn. Urochloa brizantha cv. Marandu (Marandu palisadegrass) in late winter on pasture structure, apparent selectivity, and sheep production during spring and early summer. The conditions of deferred pastures at the end of winter were: low (15.1cm and 4600kg/ha of DM), medium (23.2cm and 5940kg/ha of DM), high (31.4cm and 7640kg/ha of DM) and high/mowed (31.3cm and 7200kg/ha of DM, mowed to 8cm). The experiment was conducted in split plot design (sward conditions at the end of winter: low, medium, tall and tall/lowered) during time (early, middle and late spring/summer) and completely randomized design with three replications. The percentages of live leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal selectivity; Brachiaria brizantha syn; Urochloa brizantha; Mowing; Sward structure. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000200554 |
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| Barros,J.S.; Meirelles,P.R.L.; Gomes,V.C.; Pariz,C.M.; Fachiolli,D.F.; Santana,E.A.R.; Gomes,T.G.J.; Costa,C.; Castilhos,A.M.; Souza,D.M.. |
| RESUMO Este trabalho teve como objetivo avaliar o valor nutritivo e a força de cisalhamento da cultivar de Urochloa brizantha (syn Brachiaria brizantha) cv Xaraés submetida a três intensidades luminosas e quatro cortes. O experimento foi conduzido na FMVZ - Unesp de Botucatu, com delineamento experimental em blocos ao acaso, sendo os tratamentos: luminosidade natural, redução de 30% e 60% de luz, com quatro cortes e três repetições. As análises realizadas foram: composição bromatológica, digestibilidade e a força de cisalhamento. Não houve diferença na digestibilidade entre os tratamentos em nenhum dos cortes, mas a qualidade forrageira foi influenciada pelos níveis de intensidade de luz, tendo o tratamento com 60% de redução de luminosidade apresentado... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestibilidade; Força de cisalhamento; Sombreamento artificial; Urochloa brizantha. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000501703 |
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| Oliveira,W.F.; Lima,E.M.; Gomes,D.I.; Alves,K.S.; Santos,P.M.; Azevedo,G.S.; Mezzomo,R.. |
| ABSTRACT The aim was to evaluate the effect of different doses of two biostimulants on the productivity and canopy structure of Urochloa brizantha cv. Marandu grass in the establishment fase. The study was conducted in Universidade Federal Rural da Amazônia, Parauapebas, Pará, Brazil. One module of 35 plots of 25m² were established. A completely randomized experimental design was used, with seven treatments and five replicates. The treatments included a control, 0.5, 1, and 2kg/ha of biostimulant A (BIOST.A); and 0.25, 0.5, and 1L/ha of biostimulant B (BIOST.B). Three collections were performed. The data for application of the two biostimulants were analyzed separately, using the Dummy variable method and regression analysis. The application of 2kg/ha... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auxin; Cytokinin; Gibberellin; Forage stimulation; Urochloa brizantha. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200603 |
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| Santos,Márcia Vitória; Ferreira,Evander Alves; Valadão,Daniel; Oliveira,Fabiana Lopes Ramos de; Machado,Vitor Diniz; Silveira,Raul Ribeiro; Souza,Matheus de Freitas. |
| ABSTRACT: This study aimed to assess the effects of Eucalyptus and maize shading on characteristics related to water use by Brachiaria in agroforestry systems. Treatments were arranged in a split-split-plot design, with plots consisting of different spacing between Eucalyptus plants (12.0×2.0m and 12.0×4.0m), split-plots of different distances between Brachiaria and Eucalyptus (6.0, 4.0, and 2.0m), and split-split-plots of Brachiaria sowing sites (maize row and inter-row). One treatment with Brachiaria under full sunlight was included. Bread grass intercropping in maize inter-rows associated with the densest Eucalyptus spacing and bread grass proximity to Eucalyptus tree crowns adversely affected the stomatal conductance, internal carbon, and transpiration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Production physiology; Crop-livestock-forest integration.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500653 |
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| Mello,Andréia Cristina Tavares de; Carnevalli,Roberta Aparecida; Shiratsuchi,Luciano Shozo; Pedreira,Bruno Carneiro e; Lopes,Luciano Bastos; Xavier,Diego Batista. |
| ABSTRACT: Trees in the production systems can effectively reduce hot weather-induced stress in the Brazilian Midwest. High temperatures cause changes in animals daily routine, and trees into pastures can promote benefits. The aim of this research was to evaluate the behavior of dairy heifers in silvopastoral systems in the state of Mato Grosso, Brazil. A herd of 24 crossbreed heifers (3/4 and 7/8 Holstein/Zebu), 350kg average weight, was evaluated over three seasons. Piatã grass was managed under three shade levels: full-sun, moderate-shade, and intensive-shade provided by 10 to 12m high Eucalyptus trees. Behavior data were collected every 15 minutes from 8:30h to 16h. Shade availability significantly impacted heifer behavior, mainly affecting grazing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Silvopastoral system; Urochloa brizantha; Stress; Animal behavior. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200652 |
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| Ramalho,Israel Oliveira; Rezende,Claudia de Paula; Pereira,José Marques; Macedo,Robert de Oliveira; Santos,Camila Almeida dos; Monteiro,Rafael Cassador; Alves,Bruno José Rodrigues; Carvalho,Isabel das Neves Oiticica de; Urquiaga,Segundo; Boddey,Robert Michael. |
| ABSTRACT: The objectives of this study were to determine the rates of plant litter deposition and decomposition in Marandu pastures (Urochloa brizantha cv. Marandu) under a) three forms of nitrogen (N) supply, b) at different stages of rotational grazing and c) to compare the single-exponential decay constant (‘k’) derived from litterbags with values derived from estimates of deposited and existing litter (DEL technique). The three N supply treatments were: without or with N fertilization (zero or 150 kg N ha-1 yr-1) or with the legume Desmodium ovalifolium. There were no significant differences (p<0.05) between existing litter and rates of litter deposition and decomposition between the three N supply treatments. The litter decomposition rate was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Decomposition constant; Methodological comparison. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200202 |
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| Stumpf,Lizete; Pauletto,Eloy Antonio; Castro,Rafaela Costa de; Pinto,Luiz Fernando Spinelli; Fernandes,Flavia Fontana; Barboza,Fabrício da Silva; Franco,Ândrea Machado Pereira; Gonçalves,Fernanda Coelho. |
| Na mineração de carvão a céu aberto, a superfície é completamente suprimida de vegetação e as camadas de solo e rochas que recobrem os bancos de carvão são removidas, causando drásticas alterações no perfil do solo original. Este trabalho teve como objetivo avaliar a influência de diferentes espécies de poáceas na recuperação da estrutura de um solo construído, como parte da estratégia de recuperação de áreas degradadas por mineração de carvão. Os tratamentos avaliados foram: T1 - Hemarthria altissima, T2 - Paspalum notatum, T3 - Cynodon dactilon, T4 - Urochloa brizantha. Como testemunha, utilizou-se o solo construído sem cobertura vegetal, denominada T5. Foram coletadas amostras de solo não preservadas e preservadas nas camadas de 0,00-0,10m e 0,10-0,20m,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hemarthria altíssima; Paspalum notatum; Cynodon dactilon; Urochloa brizantha; Recuperação de área degradada. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001202171 |
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| Barbosa,Marisângela Viana; Pedroso,Daniela de Fátima; Curi,Nilton; Carneiro,Marco Aurélio Carbone. |
| ABSTRACT Soil structure, which is defined by the arrangement of the particles and the porous space forming aggregates, is one of the most important properties of the soil. Among the biological factors that influence the formation and stabilization of soil aggregates, arbuscular mycorrhizal fungi (AMF) are distinguished due to extrarradicular hyphae and glomalin production. In this context, the objective of this study was to evaluate different AMF (Acaulospora colombiana, Acaulospora longula, Acaulospora morrowiae, Paraglomus occultum and Gigaspora margarita) associated with Urochloa brizantha (A. Rich.) Stapf on soil aggregate stability. The study was conducted in a completely randomized design, using an Oxisol and autoclaved sand 2:1 (v/v), with seven... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AMF; Urochloa brizantha; Extrarradicular mycelia; Aggregation soil and structure.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100218 |
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| Souza,Marcos André Silva; Silva,Douglas Ramos Guelfi; Ávila,Fabrício William; Faquin,Valdemar; Oliveira,Geraldo César de; Bastos,Carla Elisa Alves. |
| Soil compaction directly interferes on crop yield. The objectives of this work were to evaluate the effect of previous cultivation with palisade grass [Urochloa brizantha (C. Hochstetter ex A. Rich.) R. Webster cv. Marandu] and the use of soil correctives on the growth and yield of soybeans (Glycine max L.) cultivated under various soil compaction levels, in greenhouse conditions. The experiment was conducted in pots (columns) of 0.2 m diameter PVC tubes, composed of two rings: the lower ring, 0.4 m in height, received the soil (dystrophic Red Latosol, clayey texture) without corrective and a density of 1.0 Mg m-3; and the upper ring, 0,2 m in height, received the treatments of soil correctives and density. The experimental design was fully randomized in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Glycine max; Soil density; Crop sequence. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600013 |
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| Registros recuperados: 78 | |
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