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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
01/06/2020 |
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Data da última atualização: |
01/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GOMES, F. de K.; HOMEM. B. G. C.; OLIVEIRA, M. D. B. L de; DUBEUX, J. C. B.; BODDEY, R. M.; BERNARDES, T. F.; CASAGRANDE, D. R. |
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Afiliação: |
FERNANDA DE KÁSSIA GOMES B, UFLA; BRUNO GROSSI COSTA HOMEM, UFLA; UFLA; University of Florida, USA; ROBERT MICHAEL BODDEY, CNPAB; UFLA; UFLA. |
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Título: |
Defoliation frequency affects litter responses and nitrogen excretion by heifers in palisadegrass-forage peanut pastures. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Agronomy Journal, v., p. 1-12, 2020 |
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ISSN: |
1435-0645 |
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DOI: |
DOI: 10.1002/agj2.20240 |
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Idioma: |
Inglês |
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Conteúdo: |
Legumes can contribute significantly to nitrogen (N) input in grazing systems. Grazing management is a critical factor affecting N cycling in mixed pastures, altering the legume N input as a result. This study assessed how defoliation frequency affects N cycling inrotationally stocked palisadegrass (Brachiariabrizantha)and forage peanut (Arachis pintoi) pastures. Treatments included four grazing management strategies, defined by the rest period interruption when the canopy reached 90 (90LI), 95 (95LI), and 100% (100LI) of photosynthetically active radiation interception (LI), and a fixed rest period of 42 d (42D). A 2-yr experimental period was adopted. Existing litter was greater at 100LI (2208 vs. 1964 kg ha−1; average of 42D, 90LI, and 95LI, respectively). Greater defoliation frequency (42D and 90LI) resulted in increase of litter legume proportion, resulting in greater decomposition rate, lower litter halflife (p < .001, and p = .015, respectively), and greater N cycling (91 vs. 64 kg ha−1 season−1). Less frequent defoliation (100LI) resulted in reduced total forage intake, proportion of legume intake, and lower N intake compared with other treatments (p= .007, p= .081, and p < .001, respectively). Greater defoliation frequency increased N cycling via litter, but did not affect excretion due to compensation with stocking rate. Defoliation frequency between 90 and 95% LI optimizes N cycling in palisadegrass-forage peanut mixed pastures. |
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Thesagro: |
Brachiaria sp. |
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Thesaurus Nal: |
Arachis pintoi. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02201naa a2200241 a 4500
001 2122865
005 2020-06-01
008 2020 bl uuuu u00u1 u #d
022 $a1435-0645
024 7 $aDOI: 10.1002/agj2.20240$2DOI
100 1 $aGOMES, F. de K.
245 $aDefoliation frequency affects litter responses and nitrogen excretion by heifers in palisadegrass-forage peanut pastures.
260 $c2020
520 $aLegumes can contribute significantly to nitrogen (N) input in grazing systems. Grazing management is a critical factor affecting N cycling in mixed pastures, altering the legume N input as a result. This study assessed how defoliation frequency affects N cycling inrotationally stocked palisadegrass (Brachiariabrizantha)and forage peanut (Arachis pintoi) pastures. Treatments included four grazing management strategies, defined by the rest period interruption when the canopy reached 90 (90LI), 95 (95LI), and 100% (100LI) of photosynthetically active radiation interception (LI), and a fixed rest period of 42 d (42D). A 2-yr experimental period was adopted. Existing litter was greater at 100LI (2208 vs. 1964 kg ha−1; average of 42D, 90LI, and 95LI, respectively). Greater defoliation frequency (42D and 90LI) resulted in increase of litter legume proportion, resulting in greater decomposition rate, lower litter halflife (p < .001, and p = .015, respectively), and greater N cycling (91 vs. 64 kg ha−1 season−1). Less frequent defoliation (100LI) resulted in reduced total forage intake, proportion of legume intake, and lower N intake compared with other treatments (p= .007, p= .081, and p < .001, respectively). Greater defoliation frequency increased N cycling via litter, but did not affect excretion due to compensation with stocking rate. Defoliation frequency between 90 and 95% LI optimizes N cycling in palisadegrass-forage peanut mixed pastures.
650 $aArachis pintoi
650 $aBrachiaria sp
700 1 $aHOMEM. B. G. C.
700 1 $aOLIVEIRA, M. D. B. L de
700 1 $aDUBEUX, J. C. B.
700 1 $aBODDEY, R. M.
700 1 $aBERNARDES, T. F.
700 1 $aCASAGRANDE, D. R.
773 $tAgronomy Journal$gv., p. 1-12, 2020
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| 1. |  | NOGUEIRA, D. M.; LOPES JÚNIOR, E. S.; SOUSA, P. H. F. de; CARVALHO JÚNIOR, G. M. de; ROCHA, M. da. Atividade estral de cabras Boer submetidas a dois protocolos de sincronização do estro. In: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 4.; SIMPÓSIO NORDESTINO DE ALIMENTAÇÃO DE RUMINANTES, 10.; SIMPÓSIO DE PRODUÇÃO ANIMAL DO VALE DO SÃO FRANCISCO, 1., 2006, Petrolina. Anais... Petrolina: SNPA; Embrapa Semi-Árido, 2006. 1 CD-ROM. Editores: Gherman Garcia Leal de Araújo, Fábio Mourer, Silvia Helena Nogueira Turco, Alex Uilamar Nascimento Cunha.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
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