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| Registros recuperados: 14 | |
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| Mendes-Bonato,Andréa Beatriz; Pagliarini,Maria Suely; Valle,Cacilda Borges do. |
| This paper reports a case of abnormal spindle orientation during microsporogenesis in an interspecific hybrid of the tropical grass Brachiaria. In the affected plant, prophase I was normal. In metaphase I, bivalents were regularly co-oriented but distantly positioned and spread over the equatorial plate. In anaphase I, chromosomes failed to converge into focused poles due to parallel spindle fibers. As a consequence, in telophase I, an elongated nucleus or several micronuclei were observed in each pole. In the second division, the behavior was the same, leading to polyads with several micronuclei. A total of 40% of meiotic products were affected. The use of this hybrid in production systems needing good-quality seeds is discussed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria; Interspecific hybrid; Meiosis; Spindle abnormality; Tropical grass. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023 |
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| Canto,Marcos Weber do; Bona Filho,Amadeu; Moraes,Aníbal de; Hoeschl,André Ricardo; Gasparino,Eliane. |
| Nitrogen (N) at 100, 200, 300, and 400 kg ha-1 was applied to Tanzania grass swards to evaluate the animal response and relationships between sward characteristics and the performance of young Nellore bulls (Bos indicus) under continuous stocking. A completely randomized experimental design was used with two replications between 11 November 2001 and 15 April 2002 when the sward heights were maintained at 60 cm by using different stocking rates. The average daily gain (ADG) (0.73 kg d-1) was not affected by N doses while the number of animal days ha-1 increased linearly from 515 to 1267. On the other hand, the linear increase in the animal yield was 399, 653, 755, and 895 kg ha-1 for N at 100, 200, 300, and 400 kg ha-1, respectively, while the ratio between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal performance; Nitrogen fertilization; Panicum maximum; Tropical grass. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700003 |
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| Bernardes,Thiago Fernandes; Reis,Ricardo Andrade; Moreira,Andréia Luciane. |
| High-wet roughages with low content of soluble carbohydrates, such as tropical grasses, should be inappropriate for producing silages of adequate quality. This study aimed to evaluate the fermentative and microbiological profiles of Marandu-grass ensilaged with pelleted citric pulp (PCP). Brachiaria brizantha (Hochst ex. A. Rich) Stapf cv. Marandu with 58 days of vegetative growth was harvested for producing experimental silages in PVC silos provided with Bünsen valves and density capacity of 900 kg m-3. Treatments were three PCP levels (0, 50 and 100 g kg-1 of fresh forage) and seven times (1, 4, 7, 14, 21, 28 and 56 days) after sealing. PCP inclusion increased soluble carbohydrate concentrations by 15 to 20% and reduced pH (5.3 to 4.2) and N-NH3 levels... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Bacteria; Fermentation; Tropical grass; Silage. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300003 |
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| Simili,Flávia Fernanda; Lima,Maria Lúcia Pereira; Moreira,Andréia Luciane; Soares,Paulo Victória; Roma Júnior,Luiz Carlos; Reis,Ricardo Andrade. |
| The objective of this experiment was to evaluate dry matter yield and loss of grazing due to animal trampling in response to sowing density and spacing between lines in the planting. Sorghum hybrid 1P400 was submitted to six treatments, composed of three sowing density combinations (12; 16 and 20 kg/ha of seeds) and two spacing between lines (0.40 and 0.80 m). Sorghum hybrid 1P400 was sowed in two seasons, at the end of spring (December 3rd, 2005) and the other at the end of summer (March 20th, 2006). Cultivation strategies influenced plant population in the two experimental seasons. Diameter of the stem in season 1 decreased with density increase, whereas in the second season, interaction between sowing density and spacing was significant. In the first... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle trampling; Sorghum bicolor × Sorghum sudanense; Summer annual grass; Tropical grass. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700011 |
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| Silva,Luis Felipe Prada e; Cassoli,Laerte Dagher; Roma Júnior,Luiz Carlos; Rodrigues,Ana Carolina de Oliveira; Machado,Paulo Fernando. |
| Among tropical forages, corn silage is largely used by farmers trying to explore the maximum genetic potential from the animals. However, other tropical forages, such as elephant-grass (Pennisetum purpureum), are more productive and therefore cheaper to use than corn silage. Our objective was to compare the in situ degradability of elephant-grass with that from corn hybrids, all harvested at four stages of maturity. The experimental design followed a randomized block design with nested subplots. Two corn hybrids: AG5011, ZN8392 were harvested with 25, 30, 35, and 40% dry matter (DM) in the whole plant, and separated in stem + leaf sheath + leaf blade (stover), and cobs. Elephant-grass was harvested with 30, 40, 50 and 60 days after a leveling cut. Dried... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Corn silage; Digestibility; Rumen; Tropical grass. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600005 |
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| Dantas,Carlos Clayton Oliveira; Zanine,Anderson de Moura; Souza,Alexandre Lima de; Cabral,Luciano da Silva; Negrão,Fagton de Mattos; Santos,Edson Mauro; Ferreira,Daniele de Jesus. |
| The objective of this experiment was to evaluate the losses of nutrient through gases and effluents, the nutrient recovery, fermentation parameters and the chemical parameters of silages of Brachiaria decumbens with the addition of soybean hulls, testing five levels of inclusion: 0, 10, 20, 30 and 40% (as is), with five replications per treatment. After the standardization cut of the forage, performed at 5 cm from the soil level, the soil was fertilized with nitrogen and potassium in the form of ammonium sulfate and potassium chloride, respectively, at 60 kg/ha. After 60 days, the grass was cut at 10 cm from the soil and ensiled. Experimental silos with capacity of 10 liters with Bunsen valve were used. Silos had 3 kg of sand conditioned at the bottom for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Byproduct; Conservation; Ensilage; Tropical grass. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500225 |
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| Rêgo,Margareth Maria Teles; Neiva,José Neuman Miranda; Rêgo,Aníbal Coutinho do; Cândido,Magno José Duarte; Clementino,Rossana Herculano; Restle,João. |
| The objective of the present study was to evaluate the nutritional value of elephant-grass silages containing annato byproduct. Twenty intact rams were distributed in a complete randomized block design with five diets (0; 4; 8; 12 and 16% annato byproduct in the silage) and four replications and used to estimate the intake, apparent nutrient digestibility, content of total digestible nutrients and nitrogen balance. The addition of annato byproduct raised the intakes of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE), total carbohydrates (TC), non-fibrous carbohydrates (NFC) and total digestible nutrients (TDN), in body weight (%BW) and in metabolic weight (g... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ensilage; Nutritive value; Pennisetum purpureum; Tropical grass. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000026 |
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| Oliveira,Amanda Prates; Bertipaglia,Liandra Maria Abaker; Melo,Gabriel Mauricio Peruca de; Berchielli,Telma Teresinha; Ruggieri,Ana Cláudia; Casagrande,Daniel Rume; Reis,Ricardo Andrade. |
| The objective of the present study was to evaluate the characteristics of the sward canopy of Marandu grass during the rainy season, the wet-to-dry transition and the dry seasons, between March and September 2004, under intermittent grazing, and to correlate those characteristics with the performance of crossbred heifers receiving mineral supplements ad libitum or protein supplements. The experiment consisted of a randomized block design with three blocks (set of 13 paddocks), each containing five crossbred heifers per experimental unit, totaling 15 replicates. The heifers were given protein supplements daily in individual stalls and received an average 4 g/kg/day of the supplement during the rainy season and 5 g/kg/day during the dry season. Their weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutritional value; Pasture management; Supplement; Tropical grass; Weight gain. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000017 |
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| Melo,Lilian F. De; Martins,Cibele C.; Silva,Givanildo Z. Da; Sanches,Mauricio F. G.. |
| ABSTRACT The available research concerning the processing of grass seeds is scarce, despite its fundamental importance for national and international agribusiness. The objective of this project was to evaluate the effects of processing phases on the physical and physiological quality of tanzania grass seeds for commercialization purposes. Seeds were sampled before processing and after leaving the air and screen machine (upper and intermediate screens and bottom); first gravity table (drift, upper and intermediate spouts); treating machine; second gravity table (upper, intermediate, and lower spouts). Seeds were evaluated as to water content, physical quality (purity and 1,000 seeds weight) and physiological (germination, first count of germination,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germination; Panicum maximum; Pastures; Tropical grass; Vigor. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601157 |
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| Massafera,Danilo Antonio; Florentino,Ligiane Aparecida; Rabelo,Carlos Henrique Silveira; Härter,Carla Joice; Rezende,Adauton Vilela de; Reis,Ricardo Andrade. |
| Our objective was to investigate the effect of the replacement of aruana grass by gliricidia on the fermentative losses, chemical composition, and aerobic stability of silages. For ensiling, whole-crop aruana grass (75 d of growth) was chopped (275 g kg-1 dry matter - DM) and ensiled alone or associated with gliricidia (270 g kg-1 DM; 150 d of growth). For gliricidia, we used only the leaves and stalks to ensile. The evaluated treatments were different ratios of aruana grass to gliricidia (100:0, 75:25, 50:50, 25:75, and 0:100), with four replicates (mini-silos). The silage composed only of gliricidia exhibited a lower pH than the other silages. Dry matter recovery was not affected by the treatments, although effluent losses were affected. The replacement... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestibility; Fermentative process; Fiber; Legumes; Tropical grass. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700231 |
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| Galindo, Fernando Shintate; Beloni, Tatiane; Buzetti, Salatier; Teixeira Filho, Marcelo Carvalho Minhoto; Dupas, Elisângela; Ludkiewicz, Mariana Gaioto Ziolkowski. |
| The objective of this study was to evaluate the viability of pasture with high production capacity and the potential for production of silage using different sources and doses of nitrogen (N) by quantifying the productivity of dry matter (DM), some qualitative characteristics, the total cost of production (TC) and total operating cost (TOC) of silage production. The experimental design was randomized block in a factorial scheme with four replications including two sources of nitrogen (urea and ammonium nitrate) and five N doses (0, 50, 100, 150, and 200 kg ha-1 by cutting). The increase in N provided greater DM and crude protein content and reduced the fiber content in neutral detergent. The source of N did not affect the chemical composition, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubos e adubação; Nutrição de plantas; Fitotecnia nitrogen fertilization; Chemical analysis; Production cost; Tropical grass; Panicum maximum. Adubos e adubação. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36395 |
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| Galindo, Fernando Shintate; Beloni, Tatiane; Buzetti, Salatier; Teixeira Filho, Marcelo Carvalho Minhoto; Dupas, Elisângela; Ludkiewicz, Mariana Gaioto Ziolkowski. |
| The objective of this study was to evaluate the viability of pasture with high production capacity and the potential for production of silage using different sources and doses of nitrogen (N) by quantifying the productivity of dry matter (DM), some qualitative characteristics, the total cost of production (TC) and total operating cost (TOC) of silage production. The experimental design was randomized block in a factorial scheme with four replications including two sources of nitrogen (urea and ammonium nitrate) and five N doses (0, 50, 100, 150, and 200 kg ha-1 by cutting). The increase in N provided greater DM and crude protein content and reduced the fiber content in neutral detergent. The source of N did not affect the chemical composition, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen fertilization; Chemical analysis; Production cost; Tropical grass; Panicum maximum.; Adubos e adubação. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36395 |
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| Registros recuperados: 14 | |
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