Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Planta Daninha (9) PAB (8) Infoteca-e (2) Acta Botanica (2) Rev. Ciênc. Agron. (1) Animal Sciences (1) Anais da ABC (AABC) (1) Arq. Bras. Med. Vet. Zootec. (1) Bragantia (1) R. Bras. Zootec. (1) Mais... Autor ALVES,P.L.C.A. (2) Bosi,Cristiam (2) Fidelis,Alessandra (2) Gorgone-Barbosa,Elizabeth (2) JAKELAITIS,A. (2) NEPOMUCENO,M.P. (2) Nicodemo,Maria Luiza Franceschi (2) Paciullo,Domingos Sávio Campos (2) Pezzopane,José Ricardo Macedo (2) Pires,Maria de Fátima Ávila (2) Santos,Patrícia Menezes (2) Xavier,Deise Ferreira (2) ALLEM,LAÍSA N. (1) ALMEIDA,G.M.A. (1) AMARAL,F.C.R. (1) ARAÚJO, R. A. de (1) ARAÚJO,A.C.F. (1) AZANIA,C.A.M. (1) Alvarenga,E.M. (1) Alves,P.L.C.A. (1) Mais... Palavra-chave Urochloa decumbens (27) Allelopathy (3) Caryocar brasiliense (3) Eucalyptus urograndis (3) Melinis minutiflora (3) Sombreamento (3) Brachiaria decumbens (2) Cerrado (2) Fibra em detergente neutro (2) Gramínea Forrageira (2) Massa de forragem (2) Paspalum notatum (2) Proteína bruta (2) Urochloa brizantha (2) Urochloa ruziziensis (2) Weed competition (2) Abiotic stresses (1) Acid soils (1) African grasses (1) Agroforestry system (1) Mais... Tipo do documento Info:eu-repo/semantics/article (25) Comunicado Técnico (INFOTECA-E) (2) Ano 2020 (1) 2019 (4) 2018 (4) 2017 (1) 2016 (2) 2015 (3) 2014 (4) 2011 (6) 2009 (1) 1979 (1) Mais... País Brazil (27) Idioma Inglês (17) Português (10)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 27 Primeira ... 1 2 ... Última Aluminum tolerance on genotypes of signal grass R. Bras. Zootec. Bitencourt,Gislayne de Araujo; Chiari,Lucimara; Laura,Valdemir Antônio; Valle,Cacilda Borges do; Jank,Liana; Moro,José Roberto. The objective of this work was to evaluate aluminum tolerance of five genotypes of Urochloa decumbens (D24, CD24-2, CD24-27, CD24-45 e D62) and five genotypes of Urochloa ruziziensis (R30, R44, R46, R50 and R125) in hydroponic system. Uniform tillers were collected from these genotypes and transferred to two solutions: solution 1 (200 μM CaCl2, pH 4.2) and solution 2 (200 μM CaCl2 + 200 μM AlCl3, pH 4.2). Twenty-one days later, the roots of the plants were separated, stained and digitalized for analysis of the length and diameter of the main root. The experiment was conducted in a completely randomized design, in factorial (genotypes × doses) with three replications. A significant interaction occurred between genotype and dose for length and width of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic stresses; Acid soils; Forages; Urochloa decumbens; Urochloa ruziziensis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200003 Beef cattle performance on signal grass pastures deferred and fertilized with nitrogen Arq. Bras. Med. Vet. Zootec. Amorim,P.L.; Fonseca,D.M.; Santos,M.E.R.; Pimentel,R.M.; Rodrigues,J.P.P.; Chizzotti,F.H.M.; Vitor,C.G.. ABSTRACT The effect of four nitrogen levels (0, 40, 80 and 120kg N ha-1), applied before deferment on the beef cattle production and structural variables on Urochloa decumbens (signal grass) were assessed from January to October 2012 and from January to September 2013. A randomized block design with three replicates was adopted, in an arrangement of repeated measures in time (grazing period). An interaction effect between nitrogen level and grazing period was observed on extended-plant height and herbage mass. As the nitrogen levels were increased, extended-plant height, herbage mass, total herbage allowance, and efficiency of conversion of fertilizer into herbage were increased. Throughout the grazing period, pasture height, extended-plant height,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Average daily gain; Deferrment; Seasonality; Tropical pasture; Urochloa decumbens. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000401395 Características do pasto e desempenho de novilhas em sistema silvipastoril e pastagem de braquiária em monocultivo PAB Paciullo,Domingos Sávio Campos; Lopes,Fernando César Ferraz; Malaquias Junior,João Darós; Viana Filho,Antônio; Rodriguez,Norberto Mario; Morenz,Mirton José Frota; Aroeira,Luiz Januário Magalhães. O objetivo deste trabalho foi avaliar as características do pasto e o desempenho de novilhas oriundas do cruzamento Holandês x Zebu, em sistema silvipastoril (SSP) e em monocultivo de braquiária (Urochloa decumbens). O delineamento experimental foi o de blocos ao acaso, com dois tratamentos: em monocultivo de braquiária; e o SSP, que apresentava faixas de braquiária consorciada com Stylosanthes guianensis, alternadas com faixas arborizadas. Os piquetes foram manejados sob lotação rotacionada, com 7 dias de ocupação e 35 e 49 dias de descanso, nas épocas chuvosa e seca, respectivamente. As características do pasto, o consumo e o ganho de peso não variaram com o sistema; porém, devido às reduções na quantidade e no valor nutritivo da forragem, apresentaram... Tipo: Info:eu-repo/semantics/article Palavras-chave: Urochloa decumbens; Fibra em detergente neutro; Massa de forragem; N-alcanos; Proteína bruta; Sombreamento. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100022 Características produtivas e nutricionais do pasto em sistema agrossilvipastoril, conforme a distância das árvores PAB Paciullo,Domingos Sávio Campos; Gomide,Carlos Augusto Miranda; Castro,Carlos Renato Tavares de; Fernandes,Priscila Beligoli; Müller,Marcelo Dias; Pires,Maria de Fátima Ávila; Fernandes,Elizabeth Nogueira; Xavier,Deise Ferreira. Os objetivos deste trabalho foram avaliar os efeitos de árvores dispostas em renques sobre as características produtivas e nutricionais de Urochloa decumbens e identificar a distância média, na qual ocorre o melhor aproveitamento do sombreamento moderado, em um sistema agrossilvipastoril. Os tratamentos consistiram em distâncias dos pontos de observação ao renque das árvores (0, 3, 6, 9, 12 e 15 m) e foram distribuídos em blocos ao acaso, com quatro repetições. A densidade de perfilhos e a massa e a taxa de acúmulo de forragem e a composição química do pasto foram avaliadas. A densidade de perfilhos, a massa e a taxa de acúmulo de forragem aumentaram com a distância do renque, com valores máximos de 392 perfilhos m-2, 1.347 kg ha-1 e 30,1 kg ha-1 por dia,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria decumbens; Urochloa decumbens; Fibra em detergente neutro; Massa de forragem; Perfilhamento; Proteína bruta; Sombreamento. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001000009 Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management Planta Daninha HIRATA,A.C.S.; HIRATA,E.K.; RÓS,A.B.; NARITA,N.. ABSTRACT: In vegetable farming, the reduction in the use of herbicides has been an important factor in the definition of the production system. The objective of this research was to evaluate crop yield of cauliflower cultivars grown on Urochloa decumbens straw mulch, as well as the effect of the association between straw and cultivars on weed management. The treatments were arranged in a 2 x 4 factorial scheme: two managements (with or without U. decumbens straw mulch) and four cauliflower cultivars (Barcelona, Bromus, Júlia and Lisblanc). The experiment used a randomized block design with four replicates. There was no interference of straw mulch on crop yield of cauliflower cultivars. Hybrids Barcelona and Júlia presented yields of 22.0 and 23.9 t ha-1,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Urochloa decumbens; Brassica oleracea var. botrytis; Straw mulch; Cultural management. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100180 Chemical and hydrophysical attributes of an Oxisol under coffee intercropped with brachiaria in the Cerrado PAB Rocha,Omar Cruz; Ramos,Maria Lucrécia Gerosa; Veiga,Adriano Delly; Guerra,Antonio Fernando; Bartholo,Gabriel Ferreira; Rodrigues,Gustavo Costa; Silva,Juliano Escobar da. Abstract The objective of this work was to evaluate the effect of irrigation and of the presence of brachiaria (Urochloa decumbens) between coffee (Coffea arabica) rows on coffee yield and on chemical and hydrophysical attributes of a Typic Haplustox. The study was conducted in the Cerrado region in Planaltina, Brasília, DF, Brazil, in a randomized complete block design, arranged in split-split plots, with four replicates. Water regimes (irrigated or rainfed) were assigned to the main plots, inter-row management systems to the subplots, and soil layers to the sub-subplots. The following soil attributes were determined: total organic carbon, total nitrogen, C/N ratio, carbon and nitrogen stocks, bulk density, aggregate stability, total porosity,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Urochloa decumbens; Cover crops; Soil physical quality; Soil porosity; Water availability. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901476 Controle do capim-braquiária associado à nutrição com boro no cultivo do mogno-africano em sistema silvipastoril Rev. Ciênc. Agron. Brighenti,Alexandre Magno; Muller,Marcelo Dias. Dois experimentos foram conduzidos com o objetivo de avaliar o controle do capim-braquiária (Urochloa decumbens) nas linhas de plantio do mogno-africano (Khaya ivorensis) com aplicações de herbicidas isoladas ou combinadas com boro (B), bem como a resposta do mogno-africano a esse micronutriente. Ambos os experimentos foram implantados em delineamento experimental em blocos casualizados em parcelas subdivididas, com quatro repetições. Seis tratamentos foram aplicados nas parcelas: testemunha capinada; testemunha sem capina; glyphosate (1.080 g e.a. ha-1) + chlorimuron-ethyl (10 g i.a. ha-1) + 0,05% v/v de óleo mineral, glyphosate (1.080 g e.a. ha-1) + imazethapyr (100 g i.a. ha-1), glyphosate (1.080 g e.a. ha-1) e oxyfluorfen (480 g i.a. ha-1). As... Tipo: Info:eu-repo/semantics/article Palavras-chave: Plantas daninhas; Urochloa decumbens; Micronutrientes; Integração lavoura-pecuária-floresta; Khaya ivorensis. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400012 Demografia e densidade de perfilhos de capim-braquiária sob pastejo em lotação intermitente PAB Portela,Jorge Nunes; Pedreira,Carlos Guilherme Silveira; Braga,Gustavo José. O objetivo deste trabalho foi avaliar os efeitos de intensidades de pastejo e de frequências de desfolha na demografia e densidade de perfilhos de capim-braquiária (Urochloa decumbens syn. Brachiaria decumbens) sob lotação intermitente. Foram avaliados duas intensidades de pastejo (5 e 10 cm de altura pós-pastejo) e duas frequências de desfolha (período de descanso até que o dossel atingisse 95 e 100% de interceptação luminosa, IL), de agosto de 2007 a agosto de 2008. Utilizou-se o delineamento inteiramente casualizado, em arranjo fatorial com quatro repetições. Avaliaram-se as densidades populacionais e as taxas de aparecimento e sobrevivência de perfilhos basais (DPPb, TAPb e TSPb, respectivamente) e aéreos+basais (DPPab, TAPab e TSPab). As maiores TAPb... Tipo: Info:eu-repo/semantics/article Palavras-chave: Urochloa decumbens; Dossel; Frequência de desfolhação; Intensidade de desfolhação; Interceptação luminosa. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000300013 Dinâmica da população e controle biológico da cigarrinha em pastagens de Brachiaria decumbens em Rondônia. Infoteca-e OLIVEIRA, M. A. S.; CURI, W. J.. Instalado na area experimental da EMBRAPA-UEPAE Porto Velho, visando controlar o ataque das cigarrinhas-das-pastagens em Rondonia. Foi iniciado em jan./1977, com seis piquetes de 1ha cada um, com pastagens de brachiaria decumens. Tres piquetes foram adubados com fosforo, 100kg/ha, e tres nao adubados. Cada piquete comportou tres garrotes de dois anos de idade.As ninfas foram contadas atraves de um quadro de madeira medindo 0,25m de lado, jogado 10 vezes ao acaso por piquete. O processo de contagem dos adultos foi feito atravesde uma rede entomologica de 0,4m de diametro. Conclui-se que: apos seis meses de aplicacao ainda encontrou-se cigarrinhas mortas; o fungo atinte jovens e adultos; apos aplicacao do fungo houve rapida recuperacao das pastagem, embora... Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Spittlebugs; Rondônia; Amazônia Ocidental; Western Amazon.; Gramínea Forrageira; Capim Brachiaria; Brachiaria Decumbens; Praga de Planta; Deois Flavopicta.; Controle Biológico; Cigarrinha das Pastagens; Forage grasses; Cercopidae.; Biological control; Plant pests; Urochloa decumbens. Ano: 1979 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698102 Dinâmica da serapilheira em pastagens de braquiária em sistema silvipastoril e monocultura PAB Xavier,Deise Ferreira; Lédo,Francisco José da Silva; Paciullo,Domingos Sávio de Campos; Pires,Maria de Fátima Ávila; Boddey,Robert Michael. O objetivo deste trabalho foi avaliar o efeito da introdução de leguminosas arbóreas e eucalipto em pastagens de braquiária (Urochloa decumbens cv. Basilisk), na dinâmica da serapilheira. O estudo foi realizado em sistema silvipastoril e em monocultura, em 12 meses. O delineamento experimental foi o de blocos ao acaso, com seis repetições e cinco animais por piquete. Foram avaliadas a serapilheira existente e a depositada. A serapilheira existente teve média anual de 5.038 e 3.944 kg ha-1, no sistema silvipastoril e na monocultura, respectivamente. O sistema silvipastoril causou um acréscimo significativo na serapilheira depositada. A quantidade de nitrogênio da serapilheira depositada foi maior no sistema silvipastoril, do que na monocultura,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria decumbens; Urochloa decumbens; Fluxo de nitrogênio; Leguminosas arbóreas; Pastagens tropicais. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001000014 Disturbance as a factor in breaking dormancy and enhancing invasiveness of African grasses in a Neotropical Savanna Acta Botanica Gorgone-Barbosa,Elizabeth; Pivello,Vânia R.; Baeza,M. Jaime; Fidelis,Alessandra. The Cerrado is threatened by wildfires and invasive species. We aimed to evaluate in laboratory conditions whether temperature fluctuation at the soil surface, resulting from the absence of vegetation due to fire, can affect the germination of Urochloa decumbens and U. brizantha, two invasive African grasses. Seeds of both species were submitted to simulations: 1) temperature during fire at 1cm belowground (F); 2) temperature fluctuation at 1cm belowground without vegetation cover for a month (TF); 3) (F) + (TF); 4) control at 25ºC. After treatments, seeds were put to germinate at 25ºC for 40 days. We had four replicates per treatment and three temporal replicates. We compared germination percentage and the mean germination time among treatments using... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Fire; Germination percentage; Invasive species; Physiological dormancy; Seed dormancy; Temperature fluctuation; Urochloa brizantha; Urochloa decumbens. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100131 EFFECT OF SETHOXYDIM HERBICIDE IN THE LEAF ANATOMY AND PHYSIOLOGY OF BRACHIARIA GRASS UNDER WATER STRESS Planta Daninha PEREIRA,M.R.R.; MARTINS,A.R.; MARTINS,D.; SASSO,G.; SILVA JR,A.C.. ABSTRACT The goal of this study was to analyze the leaf anatomy and physiological behavior of Brachiaria grass plants (Urochloa decumbens) under different water conditions and with the application of sethoxydim herbicide. The used experimental design was the completely randomized one, with four replications, consisting of a 3 x 2 factorial scheme, with the combination of three water managements (-0.03, -0.07 and -1.5 MPa) with and without the application of sethoxydim herbicide + Assist mineral oil, at the recommended dose for the species (184 g a.i. ha-1). The assessed physiological and anatomicalal parameters were photosynthetic rate, stomatal conductance, transpiration, difference between leaf and room temperature, dry mass of plants, thickness of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical control; Effectiveness; Urochloa decumbens. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100237 Estrutura do dossel e teor de nitrogênio do consórcio leguminosa com gramíneas de diferentes hábitos de crescimento. Infoteca-e POMPEU, R. C. F. F.; VASCONCELOS, E. C. G.; MESQUITA, A. M. S. de; SANTOS, O. G. dos; CÂNDIDO, M. J. D.; SOUZA, H. A. de; LOPES, M. N.; CAVALCANTE, A. C. R.; GUEDES, F. L.; ARAÚJO, R. A. de; MAGALHAES, J. A.. Resumo: O documento avalia as condições intensivas de manejo, e consorciada com gramíneas de diferentes hábitos de crescimento, esse experimento foi conduzido com o objetivo de avaliar o consórcio entre a leguminosa cunhã (Clitoria ternatea L.) e gramíneas forrageiras tropicais com três diferentes hábitos de crescimento: decumbente (capim-braquiária), cespitoso (capim-tamani) e estolonífero (capim--tierra verde), visando averiguar aquela mais compatível e que garanta produção mais sustentável em condições irrigadas no Semiárido brasileiro. Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Produção de forragem; Consorciação; Capim Tamani; Capim-tierra verde; Brasil; Região Nordeste; Leguminosa Forrageira; Gramínea Forrageira; Cunha; Forrageira Tropical; Clitoria Ternatea; Pastagem Consorciada; Cynodon Dactylon; Megathyrsus maximus; Urochloa decumbens; Forage legumes; Brazil. Ano: 2018 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1101508 Fire cues and germination of invasive and native grasses in the Cerrado Acta Botanica 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 Grass Weeds Interfering with Eucalypt: Effects of the Distance of Coexistence on the Initial Plant Growth Planta Daninha Graat,Y.; Rosa,J.O.; Nepomuceno,M.P.; Carvalho,L.B.; Alves,P.L.C.A.. Two experiments were carried out to evaluate the initial plant growth of Eucalyptus urograndis growing in coexistence with Urochloa decumbens and U. ruziziensis. In 100-L box, one plant of U. decumbens or U. ruziziensis grew in coexistence with one plant of E. urograndis clones C219H or H15, respectively, in the distances of 0, 5, 10, 15, 20, 25, 30, 35, and 40 cm from the crop. After 30, 60, 90 (both clones), and 150 days (just for H15), growth characteristics were evaluated. Plants of both clones, growing in weed-free situations, showed a better growth and development than plants that grew in weedy situations, independently of the distance, having the highest plant height, stem diameter, dry mass of stem, and dry mass of leaves. As the same way, the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Eucalyptus urograndis; Urochloa decumbens; Urochloa ruziziensis; Weed competition. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200203 Initial Development of Eucalyptus According to Different Desiccation Periods of Signalgrass Planta Daninha GRAAT,Y.; BACHA,A.L.; NEPOMUCENO,M.P.; ALVES,P.L.C.A.. ABSTRACT: This study aimed at evaluating the effects of different desiccation periods of Urochloa decumbens on the initial development of Eucalyptus urograndis (clone C-219H). The experiment was conducted in 100 liter concrete boxes, previously filled with Dark-Red Latosol. U. decumbens was sown in all plots, except for the control sample without covering. After 95 days from sowing, the herbicide glyphosate (dose of 1,424 g a.e. ha-1) was sprayed at intervals of 0 (Apply-Plant), 7, 14, 21, 28 and 35 days before eucalyptus planting, plus a control sample without covering, totaling seven treatments. A completely randomized design with six replications was used. Eucalyptus plants were evaluated 30, 60 and 90 days after planting (DAP), when the height of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Eucalyptus urograndis; Urochloa decumbens; Plant cover; Allelopathy. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100201 Interference Between Signal Grass and Cinderella Weed Planta Daninha MARTINS,P.F.R.B.; YAMAUTI,M.S.; ALVES,P.L.C.A.. ABSTRACT: The aim in this work was to evaluate the coexistence of Urochloa decumbens (signal grass) and Synedrellopsis grisebachii (Cinderella weed) in a replacement series experiment. To find the critical population density, 1, 2, 4, 8, 16, 24 and 32 plants were planted in the same box, harvested after 40 days, dried and weighted, and analyzed through regression analysis. The replacement series experiment used density percentages for signal grass and Cinderella weed of 100:0, 75:25, 50:50, 25:75 and 0:100. The aboveground parts were harvested, dried and analyzed through qualitative and quantitative measures. Sixteen plants per box were needed for the signal grass to achieve the critical population. Qualitative analysis showed mutual harm to the dry matter... Tipo: Info:eu-repo/semantics/article Palavras-chave: Replacement series experiment; Interspecific competition; Intraspecific competition ecological indexes; Urochloa decumbens; Synedrellopsis grisebachii. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100281 Light relations and performance of signal grass in silvopastoral system Animal Sciences Rodrigues, Cynara Oliveira Diniz; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Araújo, Saulo Alberto do Carmo; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Viana, Maria Celuta Machado; Empresa de Pesquisa Agropecuária de Minas Gerais; Rocha, Norberto Silva; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Braz, Thiago Gomes dos Santos; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Villela, Severino Delmar Junqueira; Universidade Federal dos Vales do Jequitinhonha e Mucuri. The aim was to evaluate the influence of different spatial arrangements of trees [(3×2)×20 m, (2×2)×9 m and 2×9 m] and sampling sites (center of row spacing and side of tree rows) with regard to the amount and quality of light in the understory of silvopastoral systems and their effects on the production and chemical composition of pasture. The experimental design was a randomized block in a split plot, with three replications. The sampling site affected absolute irradiance, photosynthetic active radiation (PAR), light interception (LI) and red/far red ratio, with higher rates in the center of spacing. There were high and positive correlations between LI/leaf area index (LAI), LI/dry mater (DM) and LAI/DM in the center and LI/LAI and FAR/DM in the side of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pastagem e Forragicultura quality of light; Shading; Spatial arrangements; Urochloa decumbens. Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22398 Microclimate and soil moisture in a silvopastoral system in southeastern Brazil Bragantia Pezzopane,José Ricardo Macedo; Bosi,Cristiam; Nicodemo,Maria Luiza Franceschi; Santos,Patrícia Menezes; Cruz,Pedro Gomes da; Parmejiani,Renan Suaiden. In this study, the microclimate changes in silvopastoral systems are quantified at different time and spatial scales and compared with single-pasture systems. The study was conducted in a silvopastoral system in São Carlos, Brazil (22°01' South and 47°53' West). The silvopastoral system consisted of grass pastures [Urochloa (sin. Brachiaria) decumbens cv. Basilik] lined with strips of native trees spaced at 17 m. Continuous microclimate measurements (air temperature, relative humidity, wind speed, and incident photosynthetically active radiation) were carried out from September 2010 to September 2012 at two positions of the silvopastoral system (2.0 and 8.5 m from the rows of trees) and at a pasture under full sunlight, located in an adjacent area. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Solar radiation; Air temperature; Cattle; Water balance; Urochloa decumbens. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000100110 Pequi leaves incorporated into the soil reduce the initial growth of cultivated, invasive and native species Anais da ABC (AABC) ALLEM,LAÍSA N.; GOMES,ANABELE S.; BORGHETTI,FABIAN. Studies have identified the phytotoxicity of many native species of the Cerrado; however, most of them were conducted either in inert substrates, or using exaggerate proportions of plant material. We investigated the phytotoxicity of pequi leaves added to substrate soil in quantities compatible with the litter produced by this species. Pequi leaves were triturated and added to red latosol in concentrations of 0.75%, 1.5% and 3%; the control was constituted of leafless soil. These mixtures were added to pots and irrigated daily to keep them moist. Germinated seeds of the cultivated sorghum and sesame, of the invasive brachiaria and of the native purple ipê, were disposed in the pots to grow for five to seven days at 30°C within a photoperiod of 12 h.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Caryocar brasiliense; Cerrado; Phytotoxicity; Tabebuia impetiginosa; Urochloa decumbens. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401761 Registros recuperados: 27 Primeira ... 1 2 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco