|
|
|
| Registros recuperados: 16 | |
|
|
| Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Carvalho,Ana Luiza Silva. |
| Grouping of genotypes by canonical variable analysis is an important tool in breeding. It allows the grouping of individuals with similar characteristics that are associated with superior agronomic performance and may indicate the ideal profile of a plant for the region. The objective of the present study was to define, by canonical analysis, the agronomic profile of Panicum maximum plants adapted to the Agreste region. The experiment was conducted in a completely randomized design with 28 treatments, 22 genotypes of Panicum maximum, and cultivars Mombasa, Tanzania, Massai, Milenio, BRS Zuri, and BRS Tamani in triplicate in 4-m² plots. Plots were harvested five times and the following traits were evaluated: plant height; total, leaf, and stem; dead dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multivariate analysis; Breeding value; Agronomic performance; Leaf dry matter. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000200147 |
| |
|
|
| Lopes,Clenardo Macedo; Paciullo,Domingos Sávio Campos; Araújo,Saulo Alberto do Carmo; Morenz,Mirton José Frota; Gomide,Carlos Augusto de Miranda; Maurício,Rogério Martins; Braz,Thiago Gomes dos Santos. |
| ABSTRACT: The silvopastoral system has been suggested as an alternative to recover degraded pastures in tropical regions. However, trees reduce the light available for pastures, which may affect the growth and herbage accumulation. The objective of this study was to evaluate the morphogenesis, canopy structure and herbage accumulation of signalgrass ( Brachiaria decumbens ) subjected to three light regimes (0, 20 and 70% of natural shading) and two fertilization levels (presence or absence of nitrogen, phosphorus and potassium). Leaf and stem elongation rates increased under shading but did not vary with fertilization. The leaf appearance rate was greater under fertilizer treatment but was generally similar among light regimes. The tiller density was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Morphogenesis; Shading; Silvopastoral system; Tiller density. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200403 |
| |
|
|
| Braz,Thiago Gomes dos Santos; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino; Pereira,Vinícius Valim. |
| ABSTRACT: The objective of this study was to evaluate, through partial correlation analysis, the degree of association between herbage accumulation and morphogenetic traits of ‘Tanzania’ grass (Panicum maximum Jacq.) defoliated with 95% of light interception and fertilized with nitrogen, under different planting densities. The experiment was carried out in a randomized complete design with 12 treatments and two replicates, in a 4 × 3 factorial arrangement consisting of four nitrogen rates (0, 80, 160, and 320kg ha-1 Yr-1) and three planting densities (9, 25, and 49 plants m-2). Harvests were performed at 25cm above the soil, when the plots intercepted 95% of the incident light. The simple correlation coefficients between herbage accumulation and leaf and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Pasture management; Pearson correlation; Plant density. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900402 |
| |
|
|
| Braz,Thiago Gomes dos Santos; Martuscello,Janaina Azevedo; Jank,Liana; Fonseca,Dilermando Miranda da; Resende,Marcos Deon Vilela; Evaristo,Anderson Barbosa. |
| ABSTRACT: Genetic breeding of forage plants has increasingly contributed to the release of more productive plants. In this regard, evaluating the genotypic value is essential when aiming to rank genotypes based on the mean free of environmental factors. Therefore, this study aimed to predict the genotypic value of agronomic and nutritive value characters of three progenies of Panicum maximum. Hybrids were evaluated in a clonal test in an incomplete-randomized design with three treatments (progenies 1, 2, and 3) and two replications (clones). Six harvests were performed at 25cm from the ground level throughout one year. Progeny 2 provided better results for total and leaf dry mass yield, regrowth, and height, and lower incidence of leaf spot. Progenies 1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bipolaris maydis; Chemical composition; Leaf biomass; ‘Mombaça’; ‘Tanzania’. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900401 |
| |
|
|
| Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Fonseca,Dilermando Miranda da. |
| The objective of this experiment was to evaluate the genetic divergence between hybrids obtained from 10 sexual genitors of the Panicum maximum breeding program at Embrapa Beef Cattle. For this, the following morphological descriptors were used: plant height, growth habit, leaf aspect, leaf waxiness, hair density on the sheath (DePB) and blade (DePL), degree of hardiness of the hairs on the leaf sheath (DuPB) and blade (DuPL) and length of hairs on the sheath and blade. The characteristics growth habit and waxiness were not included in the analysis for being invariant. The phenotypic correlations were low and, therefore, not used to eliminate variables. By the principal component analysis, an 84.3% accumulation of the variation was observed until the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Discriminating analysis; Optimization method; Principal components; Relative importance of the characteristics; Tocher. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900002 |
| |
|
| |
|
|
| Santos,Manoel Eduardo Rozalino; Fonseca,Dilermando Miranda da; Gomes,Virgílio Mesquita; Braz,Thiago Gomes dos Santos; Silva,Simone Pedro da; Albino,Ronan Lopes; Santos,Andreza Luzia; Silva,Guilherme Portes. |
| This study was conducted to evaluate the defoliation patterns on B. decumbens cv. Basilisk (signalgrass) tiller as a function of influence of feces deposited naturally by cattle. The signalgrass was managed with an average height of 25 cm, under continuous stocking and variable stocking rate. Interval and intensity of defoliation, grazing efficiency and forage loss were evaluated in two sites on pasture - one close and the other distant from feces. The completely randomized block design with three replications was adopted. The defoliation rate of the pasture site close to feces was 40% lower than at that distant from feces. This response pattern was similar to defoliation intensity of leaf blade. The leaf blade of the tiller close to feces also achieved... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Grazing; Sward structure; Tiller. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400010 |
| |
|
| |
|
|
| Braz,Thiago Gomes dos Santos; Fonseca,Dilermando Miranda da; Freitas,Fabrício Paiva de; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino; Santos,Márcia Vitória; Pereira,Vinícius Valim. |
| The objective of this work was to evaluate effects of nitrogen fertilization and plant density on morphogenesis of Tanzania guinea grass. It was used a random block design with 12 treatments and two replications in a 4 × 3 factorial arrangement, with four doses of nitrogen (N) (without N application, 80, 160 or 320 kg/ha.year) and three plant densities (9, 25 or 49 plants/m²). Harvest was performed at 25 cm from the ground when the canopy intercepted 95% of the incident light. Rates of leaf appearance and pseudostem elongation were positively and linearly influenced by nitrogen, whereas phillochron and leaf life span were influenced linearly and negatively. Leaf elongation responded positively to two factors, whereas leaf senescence rate and number of live... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Light interception; Morphogenetic characteristics; Structural characteristics; Panicum maximum. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700004 |
| |
|
| |
|
|
| Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Souza,Madson Williame Melo; Brito,Gerlane Ferreira de; Oliveira,Leandro Pereira de. |
| This experiment was carried out with the objectives of determining repeatability coefficients, the number of harvests necessary to increase accuracy and the genotypic stability of yield characteristics in Brachiaria brizantha cultivars in the northeast region of Brazil in the period from July 2009 to March 2011. The experimental design used was completely randomized with three treatments (Brachiaria brizantha var. Marandu, Xaraés and Piatã) and three replications. Each plot was harvested seven times: five in the rainy season and two in the dry season. Immediately after each harvest, the forage was weighed and dried to obtain total, stem, leaf and dead dry matter yields. For the estimation of the repeatability coefficient, analysis of variance, principal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage breeding; Forage production; Selection. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000100005 |
| |
|
|
| Pereira,Vinícius Valim; Fonseca,Dilermando Miranda da; Martuscello,Janaina Azevedo; Cecon,Paulo Roberto; Santos,Márcia Vitória; Braz,Thiago Gomes dos Santos. |
| The objective of this study was to evaluate the effect of different levels of nitrogen supply and plants densities in the productivity of mombasa guineagrass (Panicum maximum) in the period of establishment. The design was of completely randomized blocks, with 12 treatments and three repetitions, with four nitrogen supplies (absence of application, 80, 160 and 320 kg/ha.year) and three plant densities (9, 25 and 49 plants/m²). The plot was cut at 30 cm from the ground when the sward high intercepted 95% of light. The following items were evaluated: sward height at 95% light interception, interval and number of cuts, dry mass production, total dry mass of leaves, stems and dead material and the morphologic composition. Nitrogen increased the dry mass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Height; Light interception; Productivity. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500006 |
| |
|
|
| Braz,Thiago Gomes dos Santos; Fonseca,Dilermando Miranda da; Jank,Liana; Cruz,Cosme Damião; Martuscello,Janaina Azevedo. |
| The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of determination; Forage; Repeated measures; Selection efficiency. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015001100377 |
| |
|
| |
|
|
| Santos,Márcia Vitória; Ferreira,Francisco Affonso; Freitas,Francisco Cláudio Lopes de; Fonseca,Dilermando Miranda da; Carvalho,Abner José de; Braz,Thiago Gomes dos Santos. |
| This study was carried out with the aim of assessing the efficacy of the fluazifop-p-butyl herbicide to control Brachiaria brizantha, cultivar Marandu, in the formation of Tifton 85 grazing. Treatments consisted of five doses of fluazifop-p-butyl herbicide (0.0, 62.5, 125.0, 187.5 and 250.0 g ha-1) plus controls with no herbicide, in a completely randomized layout, with four replications. Each plot consisted of a 10-L capacity pot, with two B. brizantha plants and two Tifton 85 plants. The herbicide application was conducted before the tillage of B. brizantha, when they were about 15 cm high. Visual assessments of control of B. brizantha and intoxication of Tifton 85 plants, at 07, 21 and 45 days after application were carried out. Sixty days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical control; Tolerance; Weed. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200007 |
| |
|
|
| Pereira,Vinícius Valim; Fonseca,Dilermando Miranda da; Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Santos,Márcia Vitória; Cecon,Paulo Roberto. |
| Objetivou-se com este trabalho avaliar o efeito da adubação nitrogenada e da densidade de plantas nas características morfogênicas e estruturais do capim-mombaça (Panicum maximum Jacq. cv mombaça). O experimento foi realizado em delineamento de blocos casualizados, com 12 tratamentos e três repetições, com quatro doses de nitrogênio (0, 80, 160 e 320 kg/ha.ano) e em três densidades (9, 25 e 49 plantas/m²) nas quatro estações do ano. O corte foi realizado a 30 cm do nível do solo, quando o dossel atingia 95% de interceptação luminosa. Foram mensuradas as taxas de aparecimento foliar, senescência e alongamento foliar, filocrono, taxa de alongamento de pseudocolmo, número de folhas vivas, duração de vida das folhas, número de perfilhos totais por touceira e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação nitrogenada; Interceptação luminosa; Perfilho. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200010 |
| |
| Registros recuperados: 16 | |
|
|
|
