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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
08/08/2017 |
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Data da última atualização: |
08/08/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ZANELLA, P. G.; SBRISSIA, A. F.; PINTO, C. E.; GARAGORRY, F. C.; BALDISSERA, T. C.; GIUSTINA, L. H. P. D.; NIEHUES, M. L.; MELO, A. |
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Título: |
Short term changes in tussocks distribution of Andropogon lateralis in native pastures submitted to intermittent stocking. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu. Resumos... Brasília: Sociedade Brasileira de Zootecnia, 2017. p. 709 |
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Idioma: |
Inglês |
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Conteúdo: |
Native pastures are composed of a great variety of vegetal species, with specific compositions as a result of adaptation of these to the climatic conditions and imposed managements. However, there are still few studies that aim to study tussocks dynamics innaturalpasturesinordertounderstandthecompetitiveprocessesgovernedbygrazing intensities. The objective of this study was to verify changes in the frequency of Andropogon lateralis clumps and gaps in a natural pasture submitted to different management heights in intermittent stocking method. The experiment was carried out at the EPAGRI / Lages, SC, in an area with a native pasture with predominance of Andropogon lateralis. Pastures were grazed at four different heights (12, 20, 28 and 36 cm), based on the height of predominant species, and grazed down to 60% of pre-grazing height. The experimental design was a randomized complete block design with four replications. The relative frequencies of clumps and gaps were estimated by means of measurements along four transects of 25 meters per experimental unit. Regression analyzes were performed using SAS statistical software. The initial condition of the pastures was homogeneous with no relationship between the frequency of clumps and gaps with management heights, presenting an average frequency of 50.4% of Andropogon lateralis tussocks and 49.6% of gaps. Six months after the beginning of the experiment,itwasalreadyobservedapositiveandlinearincreaseintussocksfrequency (y = 1.74x + 26.09) and a negative linear reduction in the gaps frequency (y = -1.74x + 73.91) with increasing grazing height (R2 of 0.785). The mean frequency of clumps and gaps were,respectively,42.3 and 57.7% for management with12 cm, 68.7 and 31.3% for management with 20 cm, 73.1 and 26.9% for management with 28 cm and 87.3 and 12.7% for 36 cm. The variation observed in this study suggests the capacity of Andropogon lateralis to compete for resources, mainly light, due to its erect growth habit that, in higher managements, intercepts more light than the species of prostrate growth that vegetate in the spaces between clumps. MenosNative pastures are composed of a great variety of vegetal species, with specific compositions as a result of adaptation of these to the climatic conditions and imposed managements. However, there are still few studies that aim to study tussocks dynamics innaturalpasturesinordertounderstandthecompetitiveprocessesgovernedbygrazing intensities. The objective of this study was to verify changes in the frequency of Andropogon lateralis clumps and gaps in a natural pasture submitted to different management heights in intermittent stocking method. The experiment was carried out at the EPAGRI / Lages, SC, in an area with a native pasture with predominance of Andropogon lateralis. Pastures were grazed at four different heights (12, 20, 28 and 36 cm), based on the height of predominant species, and grazed down to 60% of pre-grazing height. The experimental design was a randomized complete block design with four replications. The relative frequencies of clumps and gaps were estimated by means of measurements along four transects of 25 meters per experimental unit. Regression analyzes were performed using SAS statistical software. The initial condition of the pastures was homogeneous with no relationship between the frequency of clumps and gaps with management heights, presenting an average frequency of 50.4% of Andropogon lateralis tussocks and 49.6% of gaps. Six months after the beginning of the experiment,itwasalreadyobservedapositiveandlinearincreaseintussocksfrequency (y = 1.74x +... Mostrar Tudo |
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Palavras-Chave: |
biodiverse environments; competition; grazings management; sward height. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03000naa a2200253 a 4500
001 1126494
005 2017-08-08
008 2017 bl uuuu u00u1 u #d
100 1 $aZANELLA, P. G.
245 $aShort term changes in tussocks distribution of Andropogon lateralis in native pastures submitted to intermittent stocking.$h[electronic resource]
260 $c2017
520 $aNative pastures are composed of a great variety of vegetal species, with specific compositions as a result of adaptation of these to the climatic conditions and imposed managements. However, there are still few studies that aim to study tussocks dynamics innaturalpasturesinordertounderstandthecompetitiveprocessesgovernedbygrazing intensities. The objective of this study was to verify changes in the frequency of Andropogon lateralis clumps and gaps in a natural pasture submitted to different management heights in intermittent stocking method. The experiment was carried out at the EPAGRI / Lages, SC, in an area with a native pasture with predominance of Andropogon lateralis. Pastures were grazed at four different heights (12, 20, 28 and 36 cm), based on the height of predominant species, and grazed down to 60% of pre-grazing height. The experimental design was a randomized complete block design with four replications. The relative frequencies of clumps and gaps were estimated by means of measurements along four transects of 25 meters per experimental unit. Regression analyzes were performed using SAS statistical software. The initial condition of the pastures was homogeneous with no relationship between the frequency of clumps and gaps with management heights, presenting an average frequency of 50.4% of Andropogon lateralis tussocks and 49.6% of gaps. Six months after the beginning of the experiment,itwasalreadyobservedapositiveandlinearincreaseintussocksfrequency (y = 1.74x + 26.09) and a negative linear reduction in the gaps frequency (y = -1.74x + 73.91) with increasing grazing height (R2 of 0.785). The mean frequency of clumps and gaps were,respectively,42.3 and 57.7% for management with12 cm, 68.7 and 31.3% for management with 20 cm, 73.1 and 26.9% for management with 28 cm and 87.3 and 12.7% for 36 cm. The variation observed in this study suggests the capacity of Andropogon lateralis to compete for resources, mainly light, due to its erect growth habit that, in higher managements, intercepts more light than the species of prostrate growth that vegetate in the spaces between clumps.
653 $abiodiverse environments
653 $acompetition
653 $agrazings management
653 $asward height
700 1 $aSBRISSIA, A. F.
700 1 $aPINTO, C. E.
700 1 $aGARAGORRY, F. C.
700 1 $aBALDISSERA, T. C.
700 1 $aGIUSTINA, L. H. P. D.
700 1 $aNIEHUES, M. L.
700 1 $aMELO, A.
773 $tIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu. Resumos... Brasília: Sociedade Brasileira de Zootecnia, 2017. p. 709
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Epagri-Sede (Epagri-Sede) |
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 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
Registro Completo
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Biblioteca(s): |
Epagri-São Joaquim; Epagri-Sede; Epagri-Videira. |
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Data corrente: |
07/08/1995 |
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Data da última atualização: |
26/06/1997 |
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Autoria: |
USHIROZAWA, K. |
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Título: |
Cultura da maca: a experiencia catarinense. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Florianopolis: EMPASC, 1978. |
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Páginas: |
295p. |
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Descrição Física: |
il. |
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Idioma: |
Português |
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Palavras-Chave: |
CULTURA; FRUTA DE CLIMA TEMPERADO; FRUTICULTURA; MACA; PRATICA CULTURAL; SANTA CATARINA; SC. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00482nam a2200193 a 4500
001 1005513
005 1997-06-26
008 1978 bl uuuu 00u1 u #d
100 1 $aUSHIROZAWA, K.
245 $aCultura da maca$ba experiencia catarinense.
260 $aFlorianopolis: EMPASC$c1978
300 $a295p.$cil.
653 $aCULTURA
653 $aFRUTA DE CLIMA TEMPERADO
653 $aFRUTICULTURA
653 $aMACA
653 $aPRATICA CULTURAL
653 $aSANTA CATARINA
653 $aSC
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