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| Registros recuperados : 8.732 | |
| Registros recuperados : 8.732 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
11/09/2004 |
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Data da última atualização: |
22/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
ALBUQUERQUE, S. G. de; SOARES, J. G. G.; GUIMARÃES FILHO, C.; OLIVEIRA, M. C. de. |
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Afiliação: |
SEVERINO GONZAGA DE ALBUQUERQUE, CPATSA; JOSÉ GIVALDO GOES SOARES, CPATSA; CLÓVIS GUIMARÃES FILHO, CPATSA; MARTINIANO CAVALCANTE DE OLIVEIRA, CPATSA. |
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Título: |
Caatinga herbaceous stratum dynamics under grazing intensities by goats in a semi-arid region of brazilian Northeast. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Sitientibus - Série Ciências Biológicas, Feira de Santana, v. 4, n. 1/2, p. 52-58, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
A native grassland Caatinga has been submitted to three grazing intensitics (GI) by goats (1981-84) to vcrify the etfcct of these GI on vegctation degradation. Treatments varied from I doell ha to I doe/3 ha, including Exclusion (without grazing) by oecupying seven arcas which ranged from ISto 45 ha. Rainlall was 484.8. 364.4. 552.8, and 605.3 mm in October/80-Septemberl 81, 1981-82, 1982-83 and 1983-84, respectively. The cffcct 01' GI on the frequency of herb species and on the density 01' woody seedling (height < 0.5 m) has been evaluatcd by using I m' (2 x 0.5 m) quadrats in cach year of rcscarch. Neither the hcrb species frequency nor the woody seedling density was influenced by GI. Frequencies of31 herb species wcrc cvaluatcd by considering the effect of prccipitation: these were divided into three groups. Group I (17 species) and group 2 (12 speeies) were inílucnccd by precipitation and have had their highest trcqucncics in 1984 and 1983. respectively. Selaginella convoluta and i lerissantia crispa. which cornpriscd thc third group, wcrc not intluenced by precipitation. Rainíall has also inlluenced the dcnsity of woody seedlings (P < 0.05), with the 1984 density (3.005) being superior to 1983 and 1982 densities (2.055 and 1.895 plantsl m", respectively). Considering the year of 1981, the mcan density in this period was 2.40 I plants/m', excluding seedlings ofthe tree Tabebuia spongiosa, to which 18.9 plants/m" in 1983 was excluded frorn analysis. In conclusion. high GI by goats during three years was not suffieient to cause Caatinga hcrbaceous stratum dcgradation. Precipitation was the most importam Iact or. MenosA native grassland Caatinga has been submitted to three grazing intensitics (GI) by goats (1981-84) to vcrify the etfcct of these GI on vegctation degradation. Treatments varied from I doell ha to I doe/3 ha, including Exclusion (without grazing) by oecupying seven arcas which ranged from ISto 45 ha. Rainlall was 484.8. 364.4. 552.8, and 605.3 mm in October/80-Septemberl 81, 1981-82, 1982-83 and 1983-84, respectively. The cffcct 01' GI on the frequency of herb species and on the density 01' woody seedling (height < 0.5 m) has been evaluatcd by using I m' (2 x 0.5 m) quadrats in cach year of rcscarch. Neither the hcrb species frequency nor the woody seedling density was influenced by GI. Frequencies of31 herb species wcrc cvaluatcd by considering the effect of prccipitation: these were divided into three groups. Group I (17 species) and group 2 (12 speeies) were inílucnccd by precipitation and have had their highest trcqucncics in 1984 and 1983. respectively. Selaginella convoluta and i lerissantia crispa. which cornpriscd thc third group, wcrc not intluenced by precipitation. Rainíall has also inlluenced the dcnsity of woody seedlings (P < 0.05), with the 1984 density (3.005) being superior to 1983 and 1982 densities (2.055 and 1.895 plantsl m", respectively). Considering the year of 1981, the mcan density in this period was 2.40 I plants/m', excluding seedlings ofthe tree Tabebuia spongiosa, to which 18.9 plants/m" in 1983 was excluded frorn analysis. In conclusion. high GI... Mostrar Tudo |
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Palavras-Chave: |
Estrato herbário; Intensidade de pastejo; Nordeste; Região semi-árida. |
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Thesagro: |
Caatinga; Caprino. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186747/1/Sitientibus-Serie-Ciencias-Biologicas-v.4-n.1-2-p.52-58-2004.pdf
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Marc: |
LEADER 02375naa a2200229 a 4500
001 1154338
005 2018-11-22
008 2004 bl uuuu u00u1 u #d
100 1 $aALBUQUERQUE, S. G. de
245 $aCaatinga herbaceous stratum dynamics under grazing intensities by goats in a semi-arid region of brazilian Northeast.
260 $c2004
520 $aA native grassland Caatinga has been submitted to three grazing intensitics (GI) by goats (1981-84) to vcrify the etfcct of these GI on vegctation degradation. Treatments varied from I doell ha to I doe/3 ha, including Exclusion (without grazing) by oecupying seven arcas which ranged from ISto 45 ha. Rainlall was 484.8. 364.4. 552.8, and 605.3 mm in October/80-Septemberl 81, 1981-82, 1982-83 and 1983-84, respectively. The cffcct 01' GI on the frequency of herb species and on the density 01' woody seedling (height < 0.5 m) has been evaluatcd by using I m' (2 x 0.5 m) quadrats in cach year of rcscarch. Neither the hcrb species frequency nor the woody seedling density was influenced by GI. Frequencies of31 herb species wcrc cvaluatcd by considering the effect of prccipitation: these were divided into three groups. Group I (17 species) and group 2 (12 speeies) were inílucnccd by precipitation and have had their highest trcqucncics in 1984 and 1983. respectively. Selaginella convoluta and i lerissantia crispa. which cornpriscd thc third group, wcrc not intluenced by precipitation. Rainíall has also inlluenced the dcnsity of woody seedlings (P < 0.05), with the 1984 density (3.005) being superior to 1983 and 1982 densities (2.055 and 1.895 plantsl m", respectively). Considering the year of 1981, the mcan density in this period was 2.40 I plants/m', excluding seedlings ofthe tree Tabebuia spongiosa, to which 18.9 plants/m" in 1983 was excluded frorn analysis. In conclusion. high GI by goats during three years was not suffieient to cause Caatinga hcrbaceous stratum dcgradation. Precipitation was the most importam Iact or.
650 $aCaatinga
650 $aCaprino
653 $aEstrato herbário
653 $aIntensidade de pastejo
653 $aNordeste
653 $aRegião semi-árida
700 1 $aSOARES, J. G. G.
700 1 $aGUIMARÃES FILHO, C.
700 1 $aOLIVEIRA, M. C. de
773 $tSitientibus - Série Ciências Biológicas, Feira de Santana$gv. 4, n. 1/2, p. 52-58, 2004.
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Embrapa Semiárido (CPATSA) |
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