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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
23/06/2009 |
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Data da última atualização: |
14/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DIFANTE, G. dos S.; NASCIMENTO JÚNIOR, D. do; EUCLIDES, V. P. B.; SILVA, C. da; BARBOSA, R. A.; GONÇALVES, W. V. |
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Afiliação: |
GELSON DOS SANTOS DIFANTE, UNIVERSIDADE FEDERAL DE VIÇOSA; DOMICIO DO NASCIMENTO JÚNIOR, UNIVERSIDADE FEDERAL DE VIÇOSA; VALERIA PACHECO BATISTA EUCLIDES, CNPGC; SILA CARNEIRO DA SILVA, ESCOLA SUPERIOR DE AGRICULTURA LUIZ DE QUEIROZ; RODRIGO AMORIM BARBOSA, CNPGC; WELLINGTON VELÁSQUEZ GONÇALVES, UNIVERSIDADE CATÓLICA DOM BOSCO. |
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Título: |
Sward structure and nutritive value of tanzania guineagrass subjected to rotational stocking managements. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 38, n. 1, p. 9-19, jan. 2009. |
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DOI: |
https://doi.org/10.1590/S1516-35982009000100002 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - The objective of this work was to evaluate the sward structure and nutritive value of Panicum maximum Jacq. cv. Tanzânia subjected to rotational stocking managements characterised by a common pre-grazing condition of 95% canopy light interception (LI) and two post-grazing residues, 25 and 50 cm. Treatments (95/25, 95/50 - LI/residue) were assigned to experimental units (groups of six 2500 m² paddocks per treatment) according to a complete randomised block design, with two replications. The variables measured corresponded to: canopy light interception, pre and post-grazing sward height, herbage mass and pre and post-grazing morphological composition, herbage bulk density, herbage accumulation and nutritive value (including to IVOMD) of the morphological components. Pre-grazing herbage mass did not differ between residues, although the herbage accumulation rate was higher for the 50 than the 25 cm (164.9 and 90.6 kg/ha.day DM, respectively). Post-grazing herbage mass values were higher for the 50 cm residue and were characterised by a higher proportion of leaf blade in relation to the 25 cm treatment, which presented a higher proportion of dead material. On average, the contents of crude protein (CP), neutral detergent fibre (NDF) and lignin in acid detergent (LAD) as well as the values of the "in vitro" organic matter digestibility (IVOMD) were similar for both treatments. Crude protein and IVOMD decreased and NDF and LAD increased from top to the bottom of the sward, indicating grazing intensity as an important variable for promoting adjustments in the grazing efficiency and nutritive value of the consumed herbage by the grazing animals.
RESUMO -Este trabalho foi realizado com o objetivo de avaliar a estrutura e o valor nutritivo de pastos de Panicum maximum Jacq. cv. Tanzânia sob regime de desfolhação intermitente submetido a duas intensidades de desfolhação e a duas alturas de resíduo (25 e 50 cm) associadas à condição pré-pastejo definida por 95% de interceptação da luz incidente (IL) pelo dossel forrageiro. O experimento foi conduzido em delineamento de blocos completos casualizados, com duas repetições. Foram avaliadas as condições de interceptação de luz incidente, as alturas pré e pós-pastejo, a massa de forragem pré e pós-pastejo e seus componentes morfológicos, a taxa de acúmulo, a densidade volumétrica da forragem e o valor nutritivo dos componentes morfológicos da forragem disponível. A massa de forragem no pré-pastejo foi semelhante entre as intensidades de desfolhação, apesar de a taxa de acúmulo nos pastos com 50 cm de resíduo ter sido maior (164,9 kg/ha.dia de MS) que a daqueles com 25 cm de resíduo (90,6 kg/ha.dia de MS). A massa de forragem no pós-pastejo foi maior nos pastos rebaixados para resíduo de 50 cm e apresentou maior percentual de lâminas foliares na sua composição morfológica. Os teores de proteína bruta (PB) e a digestibilidade in vitro de matéria orgânica (DIVMO), fibra em detergente neutro (FDN) e lignina em detergente ácido (LDA)foram semelhantes entre as intensidades de desfolhação. Entretanto, à medida que o estrato da vegetação se aproximou do solo, os teores de PB e a DIVMO diminuíram e os teores de fibra em detergente neutro e de lignina em detergente ácido aumentaram. Esses resultados indicam a intensidade de pastejo como variável importante para ajustes na eficiência de pastejo e no valor nutritivo da forragem disponível para animais em pastejo. MenosABSTRACT - The objective of this work was to evaluate the sward structure and nutritive value of Panicum maximum Jacq. cv. Tanzânia subjected to rotational stocking managements characterised by a common pre-grazing condition of 95% canopy light interception (LI) and two post-grazing residues, 25 and 50 cm. Treatments (95/25, 95/50 - LI/residue) were assigned to experimental units (groups of six 2500 m² paddocks per treatment) according to a complete randomised block design, with two replications. The variables measured corresponded to: canopy light interception, pre and post-grazing sward height, herbage mass and pre and post-grazing morphological composition, herbage bulk density, herbage accumulation and nutritive value (including to IVOMD) of the morphological components. Pre-grazing herbage mass did not differ between residues, although the herbage accumulation rate was higher for the 50 than the 25 cm (164.9 and 90.6 kg/ha.day DM, respectively). Post-grazing herbage mass values were higher for the 50 cm residue and were characterised by a higher proportion of leaf blade in relation to the 25 cm treatment, which presented a higher proportion of dead material. On average, the contents of crude protein (CP), neutral detergent fibre (NDF) and lignin in acid detergent (LAD) as well as the values of the "in vitro" organic matter digestibility (IVOMD) were similar for both treatments. Crude protein and IVOMD decreased and NDF and LAD increased from top to the bottom of the swa... Mostrar Tudo |
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Thesagro: |
Gramínea Forrageira; Manejo; Panicum Maximum; Pastagem; Pastejo Rotativo; Valor Nutritivo. |
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Thesaurus Nal: |
Grazing management; Nutritive value; Pastures; Tanzania. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04451naa a2200313 a 4500
001 1326995
005 2023-06-14
008 2009 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/S1516-35982009000100002$2DOI
100 1 $aDIFANTE, G. dos S.
245 $aSward structure and nutritive value of tanzania guineagrass subjected to rotational stocking managements.
260 $c2009
520 $aABSTRACT - The objective of this work was to evaluate the sward structure and nutritive value of Panicum maximum Jacq. cv. Tanzânia subjected to rotational stocking managements characterised by a common pre-grazing condition of 95% canopy light interception (LI) and two post-grazing residues, 25 and 50 cm. Treatments (95/25, 95/50 - LI/residue) were assigned to experimental units (groups of six 2500 m² paddocks per treatment) according to a complete randomised block design, with two replications. The variables measured corresponded to: canopy light interception, pre and post-grazing sward height, herbage mass and pre and post-grazing morphological composition, herbage bulk density, herbage accumulation and nutritive value (including to IVOMD) of the morphological components. Pre-grazing herbage mass did not differ between residues, although the herbage accumulation rate was higher for the 50 than the 25 cm (164.9 and 90.6 kg/ha.day DM, respectively). Post-grazing herbage mass values were higher for the 50 cm residue and were characterised by a higher proportion of leaf blade in relation to the 25 cm treatment, which presented a higher proportion of dead material. On average, the contents of crude protein (CP), neutral detergent fibre (NDF) and lignin in acid detergent (LAD) as well as the values of the "in vitro" organic matter digestibility (IVOMD) were similar for both treatments. Crude protein and IVOMD decreased and NDF and LAD increased from top to the bottom of the sward, indicating grazing intensity as an important variable for promoting adjustments in the grazing efficiency and nutritive value of the consumed herbage by the grazing animals. RESUMO -Este trabalho foi realizado com o objetivo de avaliar a estrutura e o valor nutritivo de pastos de Panicum maximum Jacq. cv. Tanzânia sob regime de desfolhação intermitente submetido a duas intensidades de desfolhação e a duas alturas de resíduo (25 e 50 cm) associadas à condição pré-pastejo definida por 95% de interceptação da luz incidente (IL) pelo dossel forrageiro. O experimento foi conduzido em delineamento de blocos completos casualizados, com duas repetições. Foram avaliadas as condições de interceptação de luz incidente, as alturas pré e pós-pastejo, a massa de forragem pré e pós-pastejo e seus componentes morfológicos, a taxa de acúmulo, a densidade volumétrica da forragem e o valor nutritivo dos componentes morfológicos da forragem disponível. A massa de forragem no pré-pastejo foi semelhante entre as intensidades de desfolhação, apesar de a taxa de acúmulo nos pastos com 50 cm de resíduo ter sido maior (164,9 kg/ha.dia de MS) que a daqueles com 25 cm de resíduo (90,6 kg/ha.dia de MS). A massa de forragem no pós-pastejo foi maior nos pastos rebaixados para resíduo de 50 cm e apresentou maior percentual de lâminas foliares na sua composição morfológica. Os teores de proteína bruta (PB) e a digestibilidade in vitro de matéria orgânica (DIVMO), fibra em detergente neutro (FDN) e lignina em detergente ácido (LDA)foram semelhantes entre as intensidades de desfolhação. Entretanto, à medida que o estrato da vegetação se aproximou do solo, os teores de PB e a DIVMO diminuíram e os teores de fibra em detergente neutro e de lignina em detergente ácido aumentaram. Esses resultados indicam a intensidade de pastejo como variável importante para ajustes na eficiência de pastejo e no valor nutritivo da forragem disponível para animais em pastejo.
650 $aGrazing management
650 $aNutritive value
650 $aPastures
650 $aTanzania
650 $aGramínea Forrageira
650 $aManejo
650 $aPanicum Maximum
650 $aPastagem
650 $aPastejo Rotativo
650 $aValor Nutritivo
700 1 $aNASCIMENTO JÚNIOR, D. do
700 1 $aEUCLIDES, V. P. B.
700 1 $aSILVA, C. da
700 1 $aBARBOSA, R. A.
700 1 $aGONÇALVES, W. V.
773 $tRevista Brasileira de Zootecnia$gv. 38, n. 1, p. 9-19, jan. 2009.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
05/12/2022 |
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Data da última atualização: |
05/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GOMES, S. R. B. S.; QUEIROZ, M. B. de; LEROY, J. A. S.; LIMA, J. L. R. de; FREIRE, F. A. de M.; JOBIM, K.; SOUZA, F. A. de; GOTO, B. T. |
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Afiliação: |
STEPHANIA RUTH BASILIO SILVA GOMES, Universidade Federal do Rio Grande do Norte; MARIANA BESSA DE QUEIROZ, Universidade Federal do Rio Grande do Norte; JULIANA APARECIDA SOUZA LEROY, Universidade Federal do Rio Grande do Norte; JULIANA LUIZA ROCHA DE LIMA, Universidade Federal do Rio Grande do Norte; FÚLVIO AURÉLIO DE MORAIS FREIRE, Universidade Federal do Rio Grande do Norte; KHADIJA JOBIM, Universidade Federal do Rio Grande do Norte; FRANCISCO ADRIANO DE SOUZA, CNPMS; BRUNO TOMIO GOTO, Universidade Federal do Rio Grande do Norte. |
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Título: |
Richness of arbuscular mycorrhizal fungi in a Brazilian tropical shallow lake: assessing an unexpected assembly in the aquatic-terrestrial gradient. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Diversity, v. 14, 1046, 2022. |
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DOI: |
https://doi.org/10.3390/d14121046 |
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Idioma: |
Inglês |
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Conteúdo: |
Aquatic ecosystems are historically overlooked regarding the occurrence of Arbuscular Mycorrhizal Fungi (AMF). Tropical lakes in the southern hemisphere are generally impacted by human actions, such as those in Brazil, although they still preserve a great diversity of macrophyte species that can support AMF communities. Thus, the study aimed to test (i) whether AMF community structure (composition, richness, diversity, dominance, and evenness) differs between aquatic and terrestrial conditions, and (ii) between seasons?rainy and dry. A total of 60 AMF species, distributed in 10 families and 17 genera, were found, with a difference in AMF composition between conditions (terrestrial and aquatic) and seasons (dry and rainy). The absolute species richness differed between conditions, seasons, and interactions. The aquatic/rainy season, which retrieved the most significant number of species, had the highest absolute richness and number of glomerospores and differed significantly from the terrestrial/rainy season. The results suggest that a shallow oligotrophic lake harbors a high AMF richness. In addition, this environment has a distinct AMF community from the adjacent coastal sand plain vegetation and is affected by seasonality. |
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Palavras-Chave: |
Diversidade; Ecossistema lêntico; Micorriza arbuscular; Oligotrófico; Sazonalidade. |
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Thesagro: |
Fungo; Micorriza; Restinga. |
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Thesaurus NAL: |
Glomeromycota. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1149211/1/Richness-of-arbuscular-mycorrhizal-fungi-in-a-Brazilian-tropical-shallow-lake.pdf
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Marc: |
LEADER 02214naa a2200325 a 4500
001 2149211
005 2022-12-05
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3390/d14121046$2DOI
100 1 $aGOMES, S. R. B. S.
245 $aRichness of arbuscular mycorrhizal fungi in a Brazilian tropical shallow lake$bassessing an unexpected assembly in the aquatic-terrestrial gradient.$h[electronic resource]
260 $c2022
520 $aAquatic ecosystems are historically overlooked regarding the occurrence of Arbuscular Mycorrhizal Fungi (AMF). Tropical lakes in the southern hemisphere are generally impacted by human actions, such as those in Brazil, although they still preserve a great diversity of macrophyte species that can support AMF communities. Thus, the study aimed to test (i) whether AMF community structure (composition, richness, diversity, dominance, and evenness) differs between aquatic and terrestrial conditions, and (ii) between seasons?rainy and dry. A total of 60 AMF species, distributed in 10 families and 17 genera, were found, with a difference in AMF composition between conditions (terrestrial and aquatic) and seasons (dry and rainy). The absolute species richness differed between conditions, seasons, and interactions. The aquatic/rainy season, which retrieved the most significant number of species, had the highest absolute richness and number of glomerospores and differed significantly from the terrestrial/rainy season. The results suggest that a shallow oligotrophic lake harbors a high AMF richness. In addition, this environment has a distinct AMF community from the adjacent coastal sand plain vegetation and is affected by seasonality.
650 $aGlomeromycota
650 $aFungo
650 $aMicorriza
650 $aRestinga
653 $aDiversidade
653 $aEcossistema lêntico
653 $aMicorriza arbuscular
653 $aOligotrófico
653 $aSazonalidade
700 1 $aQUEIROZ, M. B. de
700 1 $aLEROY, J. A. S.
700 1 $aLIMA, J. L. R. de
700 1 $aFREIRE, F. A. de M.
700 1 $aJOBIM, K.
700 1 $aSOUZA, F. A. de
700 1 $aGOTO, B. T.
773 $tDiversity$gv. 14, 1046, 2022.
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Embrapa Milho e Sorgo (CNPMS) |
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