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| Barros,Ana Carolina Carvalho de; Almeida,João Carlos de Carvalho; Camargo Filho,Sergio Trabali; Carvalho,Carlos Augusto Brandão de; Campana,Ludmila Lacerda; Morais,Leonardo Fiusa de. |
| Abstract: The objective of this work was to evaluate the variations in root dry matter mass (RDM) and the percentage distribution (PD) of the root density of Florico grass (Cynodon nlemfuensis) in the 0-40-cm soil layer, when managed under different grazing strategies. Two defoliation frequencies (90 and 95% light interception, as the criterion for allowing animals in the paddock) and two defoliation severities (post-grazing heights of 20 or 30 cm) were assessed. Four seasonal evaluations of the root system were performed between the winter of 2012 and the autumn of 2013, using the monolith and trench excavation technique, collecting 1-dm3 samples from soil surface down to a depth of 40 cm, in four sequential extracts of 10 cm each. Lower RDM values (0.69... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cynodon nlemfuensis; Forage species; Light interception; Percentage distribution; Post-grazing stubble height; Root density. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201276 |
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| Freitas,Rafaela Scalise Xavier de; Nepomuceno,Delci de Deus; Modesto,Elisa Cristina; Pereira,Tatiana Pires; Almeida,João Carlos de Carvalho; Morais,Leonardo Fiusa de; Pereira,Luiz Gustavo Ribeiro; Machado,Fernanda Samarini; Campos,Mariana Magalhaes; Tomich,Thierry Ribeiro. |
| Abstract: The objective of this work was to evaluate the effect of the addition of the methanolic extract of Urochloa humidicola at four different concentrations (0, 75, 150, and 250 g L-1) on the in vitro rumen fermentation of Urochloa brizantha. The following variables were evaluated by the in vitro gas production technique: kinetic parameters; rumen degradation of dry matter; and production and concentration of the methane and carbon dioxide gases and of the acetate, propionate, and butyrate short-chain fatty acids. The addition of the methanolic extract reduces the production of gases generated from the degradation of non-fibrous carbohydrates (fraction A) in 9.55, 6.67, and 13.33%, respectively, at the concentrations of 75, 150, and 250 g L-1,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa humidicola; Methane mitigation; Rumen metabolism; Secondary plant metabolites. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400504 |
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| Pereira,Tatiana Pires; Modesto,Elisa Cristina; Nepomuceno,Delci de Deus; Oliveira,Osniel Faria de; Freitas,Rafaela Scalise Xavier de; Muir,James Pierre; Dubeux Junior,José Carlos Batista; Almeida,João Carlos de Carvalho. |
| Abstract: The objective of this work was to characterize condensed tannins (CT) from six tropical forage legumes and to determine their biological activity. The monomers propelargonidin, prodelphinidin and procyanidin were analyzed, as well as extractable condensed tannin (ECT), protein-bound CT (PBCT) and fiber-bound CT (FBCT), molecular weight, degree of polymerization, polydispersity index, and biological activity by protein precipitate by phenols (PPP) of leaves of the legumes Cajanus cajan, Gliricidia sepium, Stylosanthes capitata x Stylosanthes macrocephala (stylo), Flemingia macrophylla, Cratylia argentea, and Mimosa caesalpiniifolia, and of the bark of this latter species. Differences were observed in the concentrations of ECT, PBCT, PPP, and total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage legumes; Phenols; Procyanidins; Prodelphinidins; Protein. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000901070 |
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| Morais,Leonardo Fiusa de; Almeida,João Carlos de Carvalho; Nepomuceno,Delci de Deus; Morenz,Mirton José Frota; Melo,Bárbara Maria Gomes de; Freitas,Rafaela Scalise Xavier de. |
| Abstract: The objective of this work was to evaluate the use of soybean (Glycine max), pigeon pea (Cajanus cajan), and jack bean (Canavalia ensiformis) as urease sources for elephant grass (Pennisetum purpureum) hay ammoniated with urea. The experimental design was completely randomized in a double factorial arrangement with one additional treatment: 4 urease source levels x 3 urease sources + 1 control. Chemical-bromatological analyses and carbohydrate fractionation were performed in the hay, and cumulative gas production in vitro was determined. There were interactions between urease level and source for neutral detergent fiber and acid detergent fiber, in which 1 and 2% jack bean lowered acid detergent fiber values, and 2% jack bean and 3% soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cajanus cajan; Canavalia ensiformis; Pennisetum purpureum; Non-protein nitrogen; Roughage. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201268 |
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| Nepomuceno,Delci de Deus; Almeida,João Carlos de Carvalho; Carvalho,Mário Geraldo de; Fernandes,Renata Duarte; Catunda Júnior,Francisco Eduardo Aragão. |
| The objective of this study was to identify secondary metabolite classes of tropical kudzu, perennial soybean and archer legumes through identification by phytochemical screening and confirmation by infrared (IR), ¹H and carbon-13 NMR spectroscopy of fractions obtained by organic solvents partition of crude extracts. These analyses allowed for proposing the presence of the following metabolite classes: reducing sugars, saccharides, saponins, cardiac glucosides, terpenes, coumarins, tannins, alkaloids and flavonoids. The tannins, saponins, alkaloids, organic acids and flavonoids had special consideration because they are toxic compounds and can affect the animal metabolism. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anti-nutritional factor; Anti-qualitative factor; Archer; Perennial soybean; Phytochemical screening. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001000002 |
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| Lista,Fábio Nunes; Deminicis,Bruno Borges; Almeida,João Carlos de Carvalho; Araujo,Saulo Alberto do Carmo; Zanella,Pablo Giliard. |
| ABSTRACT: Find shade-tolerant species is essential to the success of silvopastoral systems, increasingly frequent in recent years. In legumes, which have potential of biological nitrogen fixation, there is a great lack of knowledge when in shaded environments.The cultivation of four tropical forage (Neonotonia wightii, Pueraria phaseoloides, Macrotyloma axilare and Arachis pintoi) was evaluated when submitted to artificial shade levels (30, 50 and 70% shade) and in full sun during water and drought seasons. The design used was in randomized complete blocks in a sub-divided plot scheme with four replications. In the Water-season the Forage Peanuts had higher forage production in full sun (11 ton ha-1 DM), and under shade did not differ from Perennial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fabaceae; Forage production; Chemical composition. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700651 |
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| Padua,Fabio Teixeira de; Almeida,João Carlos de Carvalho; Silva,Tatiana Oliveira da; Rocha,Norberto Silva; Nepomuceno,Delci de Deus. |
| O experimento foi conduzido no setor de forragicultura e pastagens do Departamento de Nutrição Animal e Pastagens, no Instituto de Zootecnia da Universidade Federal Rural do Rio de Janeiro, em Seropédica, RJ, para avaliar a produção de matéria seca (PMS) e a composição químico-bromatológica de três leguminosas forrageiras tropicais: kudzu tropical (Pueraria phaseoloides), macrotiloma (Macrotyloma axillare) e soja perene (Neonotonia wightii) em dois sistemas de cultivo (SC) (tutorado e livre). Utilizou-se um delineamento em blocos ao acaso, em um esquema fatorial (3 (espécies) x 2 (SC) x 4 (Repetições), em parcelas de 20m². A PMS foi significativamente diferente (P<0,05) entre os SC, sendo que, para todas as espécies avaliadas, o SC tutorado apresentou... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrotiloma; Kudzu tropical e soja perene. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000400032 |
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