Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 29
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
Attributes of irrigated rice and soil solution as affected by salinity levels of the water layer Rev. Bras. Ciênc. Solo
Fraga,Thiago Isquierdo; Carmona,Felipe de Campos; Anghinoni,Ibanor; Marcolin,Elio.
In the State of Rio Grande do Sul, Brazil, flooded rice fields using Patos Lagoon as the source of water for irrigation are subject to be damaged by salinity, since this source is bound to the sea on its southern end. The sensitivity of rice is variable during plant development, being higher in the seedling and reproductive periods. However, there is not enough information about the behavior of plants under salt stress during the course of its development, especially in the vegetative stage. This study evaluated the effect of different levels of salinity of irrigation water on the salinity of soil solution over time and on some plant attributes, during the vegetative stage of rice. The study was conducted in a greenhouse, where seeds of the variety IRGA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrical conductivity; Tillering; Vegetative growth; Oryza sativa L.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400005
Imagem não selecionada

Imprime registro no formato completo
Characterization of tillers in deferred Piata palisade grass with different initial heights and nitrogen levels R. Bras. Zootec.
Sousa,Braulio Maia de Lana; Vilela,Hélio Henrique; Santos,Manoel Eduardo Rozalino; Rodrigues,Carlindo Santos; Santos,Andreza Luzia; Nascimento Júnior,Domicio do; Assis,Camila Zimmer de; Rocha,Gabriel de Oliveira.
This experiment was conducted to estimate the effects of nitrogen fertilization associated with the initial height of the Piata palisade grass on the number and structural characteristics of individual tillers after the deferment period. An area with Brachiaria brizantha cv. Piata measuring approximately 288 m² was used. Combinations of levels of nitrogen fertilization (0, 75 and 150 kg/ha of nitrogen) and initial heights of the sward (low - 20 cm, medium - 30 cm and high - 40 cm) were evaluated. The experimental design was of completely randomized blocks in subdivided plots with three replications. The number of vegetative tillers, the stem length of the vegetative, reproductive and dead tillers, and the number of dead leaves of the reproductive and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria brizantha; Seasonal production; Tillering; Tiller population density.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700009
Imagem não selecionada

Imprime registro no formato completo
Characterization of tillers of piata palisade grass deferred in the fall with varying heights and deferment periods - doi: 10.4025/actascianimsci.v35i1.13021 Animal Sciences
Vilela, Hélio Henrique; Universidade Federal de Viçosa; Sousa, Braulio Maia de Lana; Universidade Federal de Viçosa; Santos, Manoel Eduardo Rozalino; Universidade Federal de Uberlândia; Santos, Andreza Luzia; Universidade Federal de Viçosa; Silva, Natascha Almeida Marques da; Universidade Federal de Uberlândia; Nascimento Junior, Domicio do; Universidade Federal de Viçosa.
This study was conducted to evaluate the tiller population density and its structural characteristics in Brachiaria brizantha cv. Piata subjected to deferment periods (65, 85 and 105 days) and initial sward heights for deferment (20, 30 and 40 cm). A completely randomized block design was used in a split-plot scheme with three replications. The population density of vegetative basal and total tillers was influenced by the interaction between periods and initial heights of deferment, with lower values in the period of 85 days associated with the initial height of 40 cm and the period of 105 days associated with initial heights of 30 and 40 cm. The length of the stem and leaf blade of vegetative basal tillers increased with the raise in the deferment...
Palavras-chave: Brachiaria brizantha; Pasture management; Structural characteristics; Tillering; Tiller population density.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13201
Imagem não selecionada

Imprime registro no formato completo
Contribution of dark septate fungi to the nutrient uptake and growth of rice plants BJM
Vergara,Carlos; Araujo,Karla Emanuelle Campos; Alves,Luiziene Soares; Souza,Sônia Regina de; Santos,Leandro Azevedo; Santa-Catarina,Claudete; Silva,Krisle da; Pereira,Gilmara Maria Duarte; Xavier,Gustavo Ribeiro; Zilli,Jerri Édson.
ABSTRACT The use of dark septate fungi (DSE) to promote plant growth can be beneficial to agriculture, and these organisms are important allies in the search for sustainable agriculture practices. This study investigates the contribution of dark septate fungi to the absorption of nutrients by rice plants and their ensuing growth. Four dark septate fungi isolates that were identified by Internal transcribed spacer phylogeny were inoculated in rice seeds (Cv. Piauí). The resulting root colonization was estimated and the kinetic parameters Vmax and Km were calculated from the nitrate contents of the nutrient solution. The macronutrient levels in the shoots, and the NO3--N, NH4+-N, free amino-N and soluble sugars in the roots, sheathes and leaves were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa L.; DSE; NO3−-N; Tillering; Colonization.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100067
Imagem não selecionada

Imprime registro no formato completo
Detection of quantitative trait loci for leaf chlorophyll content at maximum tillering International Rice Research Institute
Dong, Y. J.; Ogawa, T.; Lin, D. Z.; Kamiunten, H.; Terao, H.; Matsuo, H..
p.16-17
Palavras-chave: Quantitative trait loci; Leaves; Chlorophyll; Tillering; Inbred rice; Alleles; Segregation; Gene mapping; Genetic markers.
Ano: 2005 URL: http://hdl.handle.net/123456789/1095
Imagem não selecionada

Imprime registro no formato completo
Dinámica de crecimiento de cultivares de Urochloa brizantha Kunth. y Megathyrsus maximus (Simon & Jacobs), a diferente frecuencia de corte. Colegio de Postgraduados
Joaquín Cancino, Santiago.
El objetivo del estudio fue determinar la producción estacional y anual de forraje, composición morfológica, características estructurales y dinámica de ahijamiento de praderas de pasto Insurgente, Toledo, Tanzania y Mombaza, cosechados a tres frecuencias de corte (FC; 4, 5 y 6 semanas), durante las épocas de nortes, sequía y lluvias. Se utilizó un diseño de bloques completos al zar, con cuatro repeticiones y arreglo de tratamientos en parcelas divididas, donde la parcela mayor fueron los cultivares y la menor las frecuencias de corte. Los cultivares se sembraron a distancia de 50 x 50 cm entre plantas y surcos, respectivamente. El tamaño de parcelas fue de 10 m2. El área de muestreo fueron los dos surcos centrales, los cuales se dividieron en 3...
Palavras-chave: Pastos tropicales; Defoliación; Acumulación de forraje; Ahijamiento; Tropical grasses; Defoliation; Herbage accumulation; Tillering; Ganadería; Doctorado.
Ano: 2014 URL: http://hdl.handle.net/10521/2349
Imagem não selecionada

Imprime registro no formato completo
Dynamics and stability of Marandu grass tillers in monocrop systems and babassu palm silvopastoral systems Agronomy
Araújo, Ricardo Alves de; Rodrigues, Rosane Cláudia; Costa, Clésio Santos; Santos, Francisco Naysson Sousa; Lima, Antonio José Temístocles; Rodrigues, Marcônio Martins.
 This study aimed to evaluate the dynamics, population density of tillers and stability index of Urochloa brizantha in silvopastoral systems composed of babassu palm trees in the Pre-Amazon region. Four systems consisting of different densities of palm trees (80, 131, and 160 palms ha-1) and a monocrop were evaluated. The rates at which the basal tillers appeared in systems with 131 and 160 palms ha-1 were similar to each other and were slower compared to the monocrop pasture and the system with 80 palms ha-1. Despite the variations, the stability index was always higher than 1.0, which infers a compensatory mechanism between tiller appearance and mortality rate, since monocrop pastures and systems with 80 palms ha-1 have a higher rate of tissue...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tiller population density; Continuous stocking; Orbignia phalerata martius; Tillering; Tillering rate.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42445
Imagem não selecionada

Imprime registro no formato completo
Efeito do ácido indol 3-butirico no enraizamento de diferentes tamanhos de perfilhos de pupunheira (Bactris gasipaes H.B.K.). Repositório Alice
GARCIA, T. B..
Estudo sobre o enraizamento de perfilhos de pupunheira utilizando acido indol 3-butirico por via seca, em quatro tipo de contracoes e tres tamanhos de perfilhos, em Manaus-AM. A coleta aleatoria foi pela realizada pela prte da manha em varias plantas. Apos a aplicacao do acido, os perfilhos foram plantados em sacos de plastico transparentes, com aproximadamente 10cm de sua base introduzida no substrato de terrico de mata mais areia lavada (80% e 20%, respectivamente). Nas condicoes do presente experimento, concluiu-se que: - todas as concentracoes de AIB estudadas tiveram efeito negativo no enraizamento da pupunheira; e - os tamanhos de perfilhos que menos enraizaram foram entre 20cm e 50cm. Devido aos resultados negativos, e' sugerida a continuacao desta...
Tipo: Teses Palavras-chave: Perfilho; Brasil; Amazonas; Manaus; Bactris Gasipaes; Enraizamento; Pupunha; Rooting; Tillering.
Ano: 1988 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/667112
Imagem não selecionada

Imprime registro no formato completo
Establishment of Brachiaria brizantha cv. Marandu, under levels of soil water availability in stages of growth of the plants R. Bras. Zootec.
Araujo,Leandro Coelho de; Santos,Patrícia Menezes; Mendonça,Fernando Campos; Mourão,Gerson Barreto.
The objective of this work was to evaluate yield traits and development of palisadegrass under the influence of water deficit during the establishment period. The experiment was carried out in a greenhouse, in a completely random block statistical design in a factorial arrangement and additional treatment (3 × 3 + 1). The treatments referred to the suppression of irrigation at different phases of the establishment (sowing, germination and initial tillerring) until the soil presented water content of 75%, 50%, and 25% of the moisture related to field capacity (qFC), besides control treatment with no water restriction. Evaluations of number of grown tillers per vase, green leaves per tiller and plant height were carried out weekly, for five weeks after the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Drought; Palisadegrass; Tillering; Water deficit.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700002
Imagem não selecionada

Imprime registro no formato completo
Establishment of Xaraés and Marandu grasses under levels of soil compaction REA
Bonfim-Silva,Edna M.; Valadão Júnior,Daniel D.; Reis,Rafael H. P. dos; Campos,Jader J.; Scaramuzza,Walcylene L. M. P..
In Cerrado soils under grazing, changes occur in physical attributes, such as increased density, decreasing on the size of water stable aggregates, and macroporosity reduction. Thus, the aim of this study was to study the effect of compaction on the establishment of two forages. It was adopted a completely randomized design with three replications, in 2 x 4 factorial design, and two forages (Xaraés grass and Marandu grass), and four levels of compaction (soil densities of 1.0, 1.2, 1.4, and 1.6 Mg m-3). The following variables were evaluated 48 days after sowing: tiller population, plant height, dry matter production of shoots and components, leaf and stem, as well as the root dry mass. The stem dry mass decreased with soil density in a similar manner for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria brizantha; Soil density; Forage; Tillering.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400012
Imagem não selecionada

Imprime registro no formato completo
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates R. Bras. Zootec.
Costa,Newton de Lucena; Moraes,Anibal de; Monteiro,Alda Lúcia Gomes; Motta,Antonio Carlos Vargas; Oliveira,Ricardo Augusto de; Rodrigues,Antonio Neri Azevedo.
The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry weight; Leaf; Senescence; Tillering.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002
Imagem não selecionada

Imprime registro no formato completo
Growth and bromatological characteristics of Brachiaria decumbens and Brachiaria ruziziensis under shading and nitrogen. Repositório Alice
FARIA, B. M.; MORENZ, M. J. F.; PACIULLO, D. S. C.; LOPES, F. C. F.; GOMIDE, C. A. de M..
ABSTRACT This study aimed to evaluate the productive and qualitative characteristics of Brachiaria decumbens and Brachiaria ruziziensis subjected to three levels of artificial shading (0, 36 and 54%) and four nitrogen (N) doses (0; 50; 100 and 150 mg dm-3 soil), using completely randomized design with a factorial scheme 2 x 3 x 4, with three replications. The dry matter production (DMP), the number of tillers per pot, root weight and crude protein (CP) and neutral detergent fiber (NDF) contents were evaluated. Both grasses responded quadractly to N, but B. ruziziensis presented greater production under the two highest N doses. The tillers density increased with N dose and was reduced under shading. The root weight increased with N dose, linearly in the...
Tipo: Separatas Palavras-chave: Fibrous fraction; Tropical grasses; Crude protein; Silvopastoral systems; Tillering; Urochloa.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100555
Imagem não selecionada

Imprime registro no formato completo
Growth and bromatological characteristics of Brachiaria decumbens and Brachiaria ruziziensis under shading and nitrogen Rev. Ciênc. Agron.
Faria,Bruna Moscat; Morenz,Mirton José Frota; Paciullo,Domingos Sávio Campos; Lopes,Fernando César Ferraz; Gomide,Carlos Augusto de Miranda.
ABSTRACT This study aimed to evaluate the productive and qualitative characteristics of Brachiaria decumbens and Brachiaria ruziziensis subjected to three levels of artificial shading (0, 36 and 54%) and four nitrogen (N) doses (0; 50; 100 and 150 mg dm-3 soil), using completely randomized design with a factorial scheme 2 x 3 x 4, with three replications. The dry matter production (DMP), the number of tillers per pot, root weight and crude protein (CP) and neutral detergent fiber (NDF) contents were evaluated. Both grasses responded quadractly to N, but B. ruziziensis presented greater production under the two highest N doses. The tillers density increased with N dose and was reduced under shading. The root weight increased with N dose, linearly in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crude protein; Fibrous fraction; Silvopastoral systems; Tillering; Tropical grasses; Urochloa.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300529
Imagem não selecionada

Imprime registro no formato completo
Growth and productive responses of tropical grass Panicum maximum to nitrate and ammonium supply R. Bras. Zootec.
Santos,Jorge Henrique da Silva; Bona,Fabiano Daniel De; Monteiro,Francisco Antonio.
This study was conducted to investigate growth response parameters and forage yield of Panicum maximum Jacq. plants supplied with nitrate (NO3-) and ammonium (NH4+) as N source in a nutrient solution. Six NO3- and NH4+ combinations were tested at the following proportions: 100-0, 85-15, 70-30, 55-45, 40-60 and 25-75%. Grass shoot (number of tillers and leaves and leaf surface area) and root (length and surface area) growth parameters and dry matter production exhibited highest values in P. maximum plants growing in the nutrient solution supplied with NO3-:NH4+ at the proportions ranging between approximately 70-30 and 55-45%. The use of NO3-:NH4+ mixture at the ratio of 55-45% instead of the NO3- solely as N source in the nutrient solution enhanced the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage production; Nitrogen nutrition; Nitrogen-use efficiency; Plant development; Tillering.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900003
Imagem não selecionada

Imprime registro no formato completo
Higher crop performance of rice hybrids than of elite inbreds in the tropics: 1. Hybrids accumulate more biomass during each phenological phase International Rice Research Institute
Bueno, C. S.; Lafarge, T..
Article in press
Tipo: Article Palavras-chave: Shoot biomass accumulation; Crop and organ growth rate; Hybrid rice; Maturity group; Harvest index; Tillering; Specific leaf area.
Ano: 2009 URL: http://hdl.handle.net/10269/1378
Imagem não selecionada

Imprime registro no formato completo
Management of consecutive cuts in the production and quality of wintergreen paspalum seeds R. Bras. Zootec.
Lopes,Rodrigo Ramos; Jaeschke Ost,Henrique; Souza,Cleber Henrique Lopes de; Franke,Lucia Brandão.
ABSTRACT The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the "Azulão" ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flowering; Germination; Paspalum guenoarum; Tillering.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001000587
Imagem não selecionada

Imprime registro no formato completo
Morphogenesis and vegetative structuring in four elephant grass genotypes (Pennisetum purpureum Schum.) Arq. Bras. Med. Vet. Zootec.
Haddade,I.R.; Vasquez,H.M.; Detmann,E.; Silva,J.F.C.; Smith,R.B.; Souza,P.M..
Structural characteristics (total in marked tillers of leaves (NFT), expanded leaves (NCE), green leaves (NFV) and dead leaves (NFS) and number of tillers per plant (NPP)) and morphogenic variables (tillering (TApPP) and rates of total leaf (TApFT), expanded leaf (TApFE) and live leaf (TApFV) appearance) were evaluated in four elephantgrass genotypes (Napier, Cameroon and Pioneiro cultivars and clone CNPGL 91 F27 05). Greenhouse evaluations were carried out every three days, from the 3rd to the 60th day after standardization cutting, according to a completely randomized block design under a factorial treatment scheme (four genotypes and 21 measurement days). The NFT and NCE of the CNPGL 91 F27 05 and Pioneiro genotypes were larger than those of Cameroon...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Elephant grass; Vegetative structure; Structural characteristic; Rate of leaf appearance; Tillering.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600017
Imagem não selecionada

Imprime registro no formato completo
Physiological studies on low-tillering rice : an ideotype for increasing grain yield potential International Rice Research Institute
Kim, Jekyu.
187 l. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Plant physiology; Tillering; Ideotypes; Grain yield.
Ano: 1988 URL: http://hdl.handle.net/123456789/1217
Imagem não selecionada

Imprime registro no formato completo
Response of wheat to foliar application of zinc Ciência Rural
Zoz,Tiago; Steiner,Fábio; Fey,Rubens; Castagnara,Deise Dalazen; Seidel,Edleusa Pereira.
Wheat is grown in Brazil, mostly in no-till, a system in which the zinc can become potentially deficient, due to excessive application of acidity corrective and phosphate fertilizers in surface and, or at shallow depths. This study aimed to evaluate the effect of foliar application of zinc in agronomic characteristics and yield of wheat. The experimental design was randomized blocks with five replications. Treatments consisted of four doses of zinc (0, 54, 108 and 216g ha-1 Zn), divided into two foliar applications, the first at tillering (18 days after plant emergence) and the second at the boot stage (65 days after emergence). Foliar application of zinc increased the number of fertile tillers and yield of wheat, however, have little effect on the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Plants nutrition; Tillering; Foliar fertilization.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000500004
Imagem não selecionada

Imprime registro no formato completo
Role of nonproductive tillers as transient sinks of assimilates in wheat Bragantia
Fioreze,Samuel Luiz; Michelon,Luiz Henrique; Turek,Thaís Lemos; Drun,Robson Pelissari; Dalorsaleta,Julio César Sbardella.
ABSTRACT Although source–sink relationships in wheat are well studied, the performance of tillers as transient sinks is still unclear, especially under stress conditions. Thus, this work aimed to study the yield relationships of wheat stems in contrasting genotypes as affected by tiller treatment under stress conditions. Two experiments were conducted under greenhouse conditions using BRS Guamirim (high tillering) and BRS Parrudo (low tillering) wheat cultivars. Four tillering treatments were applied on late tillers in the first growing season (2016) and three in the second (2017): (i) free-tillering, (ii) detillering, (iii) physical suppression (only in the first season) and (iv) “spikes removal”. The main stem and the first four emitted tillers were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Source–sink relationship; Tillering; Drought stress; Defoliation.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020005004203
Registros recuperados: 29
Primeira ... 12 ... 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

Valid HTML 4.01 Transitional