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Brachiaria brizantha Stapf access evaluation and estimates of genetic parameters for agronomical characters - DOI: 10.4025/actasciagron.v31i1.6605 Agronomy
Basso, Kelen Cristina; UEM; Resende, Rosangela Maria Simeão; EMBRAPA; Valle, Cacilda Borges do; EMBRAPA; Gonçalves, Manoel Carlos; UFGD; Lempp, Beatriz; UFGD.
Currently, Brachiaria brizantha Stapf is the tropical grass with the largest cultivated area in Brazil, being responsible for a major part of the seed market and for the increase in animal production. There are several superior genotypes available in germplasm banks, collected from the African continent and in need of evaluation. The selection of these genotypes must be based on predicted genotype values of the individuals in function of being perennial plants and of unsexed propagation. The standard procedure for the prediction of genetic values is the individual BLUP (Best Linear Unbiased Predictor), using estimates of variance components achieved by the restricted maximum likelihood (REML) on an individual model. With the aim of selecting B. brizantha...
Palavras-chave: Genetic correlation; Tropical forage; Heritability; REML/BLUP; Repeatability; Genotypes 5.02.01.03-4 Genética e Melhoramento Florestal correlação genética; Gramínea tropical; Herdabilidade; REML/BLUP; Repetibilidade; Genótipos..
Ano: 2009 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6605
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Brazilian scientific progress in pasture research during the first decade of XXI century R. Bras. Zootec.
Euclides,Valéria Pacheco Batista; do Valle,Cacilda Borges; Macedo,Manuel Cláudio Motta; Almeida,Roberto Giolo de; Montagner,Denise Baptaglin; Barbosa,Rodrigo Amorim.
This paper aims to discuss the scientific progress obtained in the past ten years in genetics and plant breeding, soil fertility and plant nutrition and the importance of target sward conditions for planning, controlling and recommending management grazing of tropical grasses. In addition, progress in crop-livestock integration systems and management alternatives for mitigation of greenhouse gas emission by beef cattle production systems, two very important areas related to sustainable production systems, will also be discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop and pasture association; Grazing management; Methane emission; Tropical forage.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300018
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Fatty acid profile in vertical strata of elephant grass subjected to intermittent stocking Anais da ABC (AABC)
DIAS,KAMILA M.; SCHMITT,DANIEL; RODOLFO,GISELLE R.; DESCHAMPS,FRANCISCO C.; CAMARGO,GUILHERME N.; PEREIRA,RAPHAEL S.; SBRISSIA,ANDRÉ F..
ABSTRACT The milk and meat from animals with a pasture-based diet have higher proportions of CLA and C18:3 and lower omega-6:omega-3 ratios than products from animals with diets based on corn silage and concentrate. However, most of the published studies have evaluated fatty acid profiles in temperate climate grasses and the literature with tropical grasses is scarce. Thus, the aim of this study was to evaluate the morphological and fatty acid compositions in the vertical strata of elephant grass (Pennisetum purpureum Schum.) swards subjected to grazing heights (90 or 120 cm pre-grazing heights) and levels of defoliation (50% or 70% removal of the initial pre-grazing height). There were no interactions among pre-grazing height, the level of defoliation and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linolenic acid; Pennisetum purpureum Schum; Polyunsaturated fatty acid; Tropical forage.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401707
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Flemingia macrophylla in goat feeding R. Bras. Zootec.
Oiticica,Isabel das Neves; Fonseca,Carlos Elysio Moreira da; Souza,Vinícius Carneiro de; Silva,Aline Barros da; Lopes,Fernando César Ferraz; Morenz,Mirton José Frota.
ABSTRACTThe objective of this work was to evaluate the inclusion of Fabaceae Flemingia macrophylla (Willd.) Kuntze ex Merr. in the diet of lactating dairy goats arranged in a 5 × 5 Latin square. The diets were composed of 40% of concentrate and 60% of roughage, and the dietary treatments were defined by the level of Flemingia hay inclusion (0%, 8%, 16%, 24%, and 32% in the diet dry matter) replacing Cynodon dactyloncv. Tifton 85 hay. The diets were isonitrogenous, with 14% crude protein. Feed intake, nutrient digestibility, feeding behavior, and ruminal pH and ammonia nitrogen were evaluated. There was no difference in dry matter intake with the inclusion of Flemingia hay in the diet. The digestibility of dry matter, organic matter, crude protein, neutral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Feeding behavior; Leguminosae; Ruminal pH; Tropical forage.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000900335
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Key factors that influence for seasonal production of Guinea grass Scientia Agricola
Araujo,Leandro Coelho de; Santos,Patricia Menezes; Rodriguez,Daniel; Pezzopane,José Ricardo Macedo.
ABSTRACT: Climate, soil and management are the main drives for growth and production of tropical pastures. Thus, a better understanding of the effects of these factors and their interactions under climate conditions is required to obtain effective management options. Here, we used data from two field trials to research on climate and management interactions on the production seasonality of Panicum maximum Jacq. Treatments included four sampling times (250, 500, 750, and 1000 °C accumulated) during eight regrowth period, under irrigated and rainfed conditions and, cuts were made to simulate grazing intensity. All treatments were arranged in a completely randomized block design with four replications. At each sampling time, basal tillers were sampled to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Daylength; Degree-days; Mombaça; Tropical forage; Water deficit.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300191
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Milk production and ingestive behavior of cows grazing on Marandu and Mulato II pastures under rotational stocking R. Bras. Zootec.
Demski,Joana Baptista; Arcaro Junior,Irineu; Gimenes,Flavia Maria de Andrade; Toledo,Luciandra Macedo de; Miranda,Mariana Santos de; Giacomini,Alessandra Aparecida; Silva,Gianni Aguiar da.
ABSTRACT The objective of this study was to evaluate milk production and ingestive behavior of Holstein cows and the structural characteristics of Mulato II, a hybrid Brachiaria grass CIAT 36087 (B. ruziziensis × B. decumbens × B. brizantha), and Marandu (Brachiaria brizantha cv. Marandu) pastures under rotational stocking. The experiment was conducted from December 2011 to April 2012 after 10 months of adaptation to the grazing management objectives (25 cm pre-grazing height and 15-20 cm post-grazing height). An area of 4 ha was divided into 28 paddocks: 14 with Mulato II pasture and 14 with Marandu pasture. The treatments consisted of the two grasses and a completely randomized design of the grazing variables with six repetitions each (paddock of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria; Dairy cow; Nutritional value; Milk composition; Pasture; Tropical forage.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100708
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Pastagens nativas e cultivadas no Pantanal Mato-Grossense. Infoteca-e
COMASTRI FILHO, J. A..
As pastagens nativas, base de sustentacao do rebanho bovino (3,7 milhoes de cabecas) no Pantanal Mato-Grossense, localizam-se principalmente nas partes mais baixas do mesorelevo. Como sao alagaveis durante a cheia, o gado se concentra nos cerrados, pobres em forragem. Nas cheias as pastagens de extensas planicies permanecem submersas por longo periodo. O Pantanal alto, que sofre pequenas inundacoes, e composto por quatro formacoes vegetais: cerrado, caronal, campo cerrado e campo limpo-vazante. A UEPAE de Corumba dedica especial interesse pelo cerrado, dificilmente inundavel, e pelo caronal, de preparo de solo mais barato. O cerrado pode ser de "alta", "media" e "baixa" fertilidade, proporcional ao manto vegetativo. O uso dos cordoes arenosos (cerrado) na...
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Campo limpo; Vazante; Caronal; Native grassland; Elyonurus; Flood plain; Pasture; Tropical forage; Bovine.; Alimentação; Brachiaria; Bovino; Cerrado; Fertilidade; Forrageira Tropical; Pastagem; Pastagem Nativa; Planta.; Pantanal..
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787711
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Productivity and quality of Brachiaria brizantha B4 seeds in function of nitrogen doses Ciência Rural
Benteo,Gleiciane de Lima; Verzignassi,Jaqueline Rosemeire; Fernandes,Celso Dornelas; Valle,Cacilda Borges do; Macedo,Manuel Cláudio Motta; Libório,Cláudia Barrios de; Monteiro,Lenise Castilho.
ABSTRACT: This study aimed to evaluate aspects of reproductive phenology, yield components and seed quality of the B4 genotype of Brachiaria brizantha in function of nitrogen doses applied at pre-flowering. The experiment was carried out at Embrapa Beef Cattle, in a randomized block design, with seeding density of 2.59kg SPV ha-1 in the first year, in free growth plants. Urea was applied at pre-flowering at doses of 0, 25, 50, 75, 100, 125 and 150kg ha-1. The reproductive cycle of the plant lasts 225 days, with late flowering. N doses influenced the following characteristics: number of fully expanded inflorescences, percentage of dry matter, dry biomass, number of spikelets per raceme, seed yield, weight of a thousand seeds, germination, germination speed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fertilizer; Tropical forage; Seed quality.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901566
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Ruminal dry matter and fiber fraction degradability from two stylos cultivars Arq. Bras. Med. Vet. Zootec.
Corrêa,D.S.; Magalhães,R.T.; Siqueira,D.C.B..
Ruminal degradability of dry matter, neutral detergent fiber and acid detergent fiber of cultivars Stylozanthes guianensis (Mineirão) and Stylozanthes spp. (Campo Grande) were evaluated. Two incubations in rumen-fistulated adult bovine females were undertaken. Each incubation comprised of 25 samples of 7.0 g of each cultivar and samples were collected at 0, 6, 9, 12, 24, 36, 48, 72 and 96 hours after incubation. At a 5%/hour passage rate, Stylozanthes guianensis had 75.70, 59.01 and 76.81% effective degradability for dry matter, neutral detergent fiber and acid detergent fiber, respectively, whereas Stylozanthes spp. had 68.39, 51.93 and 58.89% for the same fractions. The lag time was different (P<0.05) only for acid detergent fiber. Stylozanthes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stylos; Cattle breeding; Tropical forage; Ruminal degradability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000401155
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Tolerância à seca em forrageiras tropicais - Aspectos agronômicos e microbiológicos. Infoteca-e
SOUTO, S. M.; ARONOVICH, S..
Gramíneas. Leguminosas; Método de seleção de plantas para a seca, através da germinação de sementes em solução de sacarose.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Tropical forage; Saccharose.; Forrageira Tropical; Germinação; Gramínea; Leguminosa; Semente.; Sacarose; Germination; Grasses; Legumes; Sucrose.; Seeds.
Ano: 1992 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/624208
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Using genetic diversity information to establish core collections of Stylosanthes capitata and Stylosanthes macrocephala Genet. Mol. Biol.
Santos-Garcia,Melissa Oliveira; Toledo-Silva,Guilherme de; Sassaki,Rodrigo Possidonio; Ferreira,Thais Helena; Resende,Rosângela Maria Simeão; Chiari,Lucimara; Karia,Cláudio Takao; Carvalho,Marcelo Ayres; Faleiro,Fábio Gelape; Zucchi,Maria Imaculada; Souza,Anete Pereira de.
Stylosanthes species are important forage legumes in tropical and subtropical areas. S. macrocephala and S. capitata germplasm collections that consist of 134 and 192 accessions, respectively, are maintained at the Brazilian Agricultural Research Corporation Cerrados (Embrapa-Cerrados). Polymorphic microsatellite markers were used to assess genetic diversity and population structure with the aim to assemble a core collection. The mean values of H O and H E for S. macrocephala were 0.08 and 0.36, respectively, whereas the means for S. capitata were 0.48 and 0.50, respectively. Roger's genetic distance varied from 0 to 0.83 for S. macrocephala and from 0 to 0.85 for S. capitata. Analysis with STRUCTURE software distinguished five groups among the S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stylosanthes; Tropical forage; Microsatellites; Genetic diversity; Core collection.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000500020
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