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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
21/02/2020 |
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Data da última atualização: |
02/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RUEDA, B. L.; McROBERTS, K. C.; BLAKE, R. W.; NICHOLSON, C. F.; VALENTIM, J. F.; FERNANDES, E. C. M. |
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Afiliação: |
B. L. Rueda; K. C. McRoberts; R. W. Blake; C. F. Nicholson; JUDSON FERREIRA VALENTIM, CPAF-AC; E. C. M. Fernandes. |
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Título: |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Cogent Food & Agriculture, v. 6, 1722350, 2020. |
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ISSN: |
2331-1932 |
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DOI: |
10.1080/23311932.2020.1722350 |
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Idioma: |
Inglês |
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Conteúdo: |
Low-input cultivated pastures to feed cattle have dominated land use after forest clearing for decades in the western Brazilian Amazon. This study was undertaken to help understand the inherent nutrient supply dynamics underwriting cattle performance on three farms in the state of Acre. We assessed soil chemical and physical properties associated over time with different land uses following forest clearing. This information permitted specifying a conceptual model of nutrient stocks and flows under the observed grazing system, which produced insights about the dynamics of soil nutrient degradation. Above ground forage mass, topsoil nutrient concentrations and soil bulk density were measured. Land covers were Brachiaria spp. grasses, a grass-Pueraria phaseoloides mix, cropland and forest. Most soil nutrient parameters initially decreased after clearing, gradually recovering over time with grass-only pastures; however, 20 yr-old pastures had 20% less forage mass. Most pasture system nutrients on these farms resided in topsoil and roots, where large stocks of mature forage supported soil fertility with recycled nutrients from litter. Estimates of partial topsoil nutrient balances were negative. This suggested that corresponding nutrient stocks and the accumulation of forage mass were probably maintained primarily through the sum of inflows from cattle excreta, the subsoil, soil organic matter, and litter mineralization with scant input of commercial fertilizer. Therefore, herd management to increase animal system productivity via higher stocking rates on vegetatively younger forage requires monitoring of nutrient stocks and flows and fertilization that assures replenishment of the nutrients extracted. Otherwise, rapid depletion of soil nutrient stocks will lead to system degradation and failure. MenosLow-input cultivated pastures to feed cattle have dominated land use after forest clearing for decades in the western Brazilian Amazon. This study was undertaken to help understand the inherent nutrient supply dynamics underwriting cattle performance on three farms in the state of Acre. We assessed soil chemical and physical properties associated over time with different land uses following forest clearing. This information permitted specifying a conceptual model of nutrient stocks and flows under the observed grazing system, which produced insights about the dynamics of soil nutrient degradation. Above ground forage mass, topsoil nutrient concentrations and soil bulk density were measured. Land covers were Brachiaria spp. grasses, a grass-Pueraria phaseoloides mix, cropland and forest. Most soil nutrient parameters initially decreased after clearing, gradually recovering over time with grass-only pastures; however, 20 yr-old pastures had 20% less forage mass. Most pasture system nutrients on these farms resided in topsoil and roots, where large stocks of mature forage supported soil fertility with recycled nutrients from litter. Estimates of partial topsoil nutrient balances were negative. This suggested that corresponding nutrient stocks and the accumulation of forage mass were probably maintained primarily through the sum of inflows from cattle excreta, the subsoil, soil organic matter, and litter mineralization with scant input of commercial fertilizer. Therefore, herd m... Mostrar Tudo |
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Palavras-Chave: |
Acre; Amazonia Occidental; Amazônia Ocidental; Estatus nutricional; Fertilidad del suelo; Nutrición animal; Pastoreando; Western Amazon. |
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Thesagro: |
Estado Nutricional; Fertilidade do Solo; Nutrição Animal; Pastagem. |
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Thesaurus Nal: |
Animal nutrition; Grazing; Nutritional status; Soil fertility. |
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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/211166/1/26979.pdf
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Marc: |
LEADER 02941naa a2200397 a 4500
001 2120545
005 2021-07-02
008 2020 bl uuuu u00u1 u #d
022 $a2331-1932
024 7 $a10.1080/23311932.2020.1722350$2DOI
100 1 $aRUEDA, B. L.
245 $aNutrient status of cattle grazing systems in the western brazilian Amazon.$h[electronic resource]
260 $c2020
520 $aLow-input cultivated pastures to feed cattle have dominated land use after forest clearing for decades in the western Brazilian Amazon. This study was undertaken to help understand the inherent nutrient supply dynamics underwriting cattle performance on three farms in the state of Acre. We assessed soil chemical and physical properties associated over time with different land uses following forest clearing. This information permitted specifying a conceptual model of nutrient stocks and flows under the observed grazing system, which produced insights about the dynamics of soil nutrient degradation. Above ground forage mass, topsoil nutrient concentrations and soil bulk density were measured. Land covers were Brachiaria spp. grasses, a grass-Pueraria phaseoloides mix, cropland and forest. Most soil nutrient parameters initially decreased after clearing, gradually recovering over time with grass-only pastures; however, 20 yr-old pastures had 20% less forage mass. Most pasture system nutrients on these farms resided in topsoil and roots, where large stocks of mature forage supported soil fertility with recycled nutrients from litter. Estimates of partial topsoil nutrient balances were negative. This suggested that corresponding nutrient stocks and the accumulation of forage mass were probably maintained primarily through the sum of inflows from cattle excreta, the subsoil, soil organic matter, and litter mineralization with scant input of commercial fertilizer. Therefore, herd management to increase animal system productivity via higher stocking rates on vegetatively younger forage requires monitoring of nutrient stocks and flows and fertilization that assures replenishment of the nutrients extracted. Otherwise, rapid depletion of soil nutrient stocks will lead to system degradation and failure.
650 $aAnimal nutrition
650 $aGrazing
650 $aNutritional status
650 $aSoil fertility
650 $aEstado Nutricional
650 $aFertilidade do Solo
650 $aNutrição Animal
650 $aPastagem
653 $aAcre
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aEstatus nutricional
653 $aFertilidad del suelo
653 $aNutrición animal
653 $aPastoreando
653 $aWestern Amazon
700 1 $aMcROBERTS, K. C.
700 1 $aBLAKE, R. W.
700 1 $aNICHOLSON, C. F.
700 1 $aVALENTIM, J. F.
700 1 $aFERNANDES, E. C. M.
773 $tCogent Food & Agriculture$gv. 6, 1722350, 2020.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
19/04/2005 |
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Data da última atualização: |
19/04/2005 |
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Autoria: |
PIZARRO, E. A.; CARVALHO, M. A. |
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Título: |
Evaluation of a collection of Calopogonium mucunoides desv. for the Cerrado ecosystem, Brazil. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Journal of Applied Seed Production, Corvallis, v. 15, p. 17-21, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
An agronomic evaluation of the tropical forage legume Calopogonium mucunoides Desv., was made by growing 215 accessions for two levels of fertility on a red-yellow latosol in the Brazilian Cerrado. Annual dry matter yield (DMY) for the 12 cluster ranged from 1-3.6 t ha e-1, the highest being in clusters 1,3,7 and 9. These four clusters contained 47 accessions (22% of the collection), with medium-low seed yield. Groups 1,3 and 6 with clusters 11,10,4,5,8,2 and 6 were 56% o the collection, with intermediate DMY and variable seed yield, ranging from high to low. Seed yield during the first year was high only in group one (clusters 10 and 11) which was only 10% of the collection. The collection presented two other important differences. Leaflets varied in size (normal, as the commercial C. mucunoides cv. Comúm, and small) and in the number of hairs mm e-2. Also, a negative relationship between the degree of pilosity and in vitro dry matter digestibility was found. Hairs were impregnated with lignin and cutin, both of which impede digestibility of intact tissue. Seventeen accessions were selected for further evaluation in larger plots. Two accesions, CIAT 822 and 20709, were outstanding for their leaf retention during the dry season in the Cerrado ecosystem. |
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Thesagro: |
Calopogonium Mucunoides; Cerrado; Digestibilidade; Leguminosa Forrageira. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01829naa a2200181 a 4500
001 1560694
005 2005-04-19
008 1997 bl --- 0-- u #d
100 1 $aPIZARRO, E. A.
245 $aEvaluation of a collection of Calopogonium mucunoides desv. for the Cerrado ecosystem, Brazil.
260 $c1997
520 $aAn agronomic evaluation of the tropical forage legume Calopogonium mucunoides Desv., was made by growing 215 accessions for two levels of fertility on a red-yellow latosol in the Brazilian Cerrado. Annual dry matter yield (DMY) for the 12 cluster ranged from 1-3.6 t ha e-1, the highest being in clusters 1,3,7 and 9. These four clusters contained 47 accessions (22% of the collection), with medium-low seed yield. Groups 1,3 and 6 with clusters 11,10,4,5,8,2 and 6 were 56% o the collection, with intermediate DMY and variable seed yield, ranging from high to low. Seed yield during the first year was high only in group one (clusters 10 and 11) which was only 10% of the collection. The collection presented two other important differences. Leaflets varied in size (normal, as the commercial C. mucunoides cv. Comúm, and small) and in the number of hairs mm e-2. Also, a negative relationship between the degree of pilosity and in vitro dry matter digestibility was found. Hairs were impregnated with lignin and cutin, both of which impede digestibility of intact tissue. Seventeen accessions were selected for further evaluation in larger plots. Two accesions, CIAT 822 and 20709, were outstanding for their leaf retention during the dry season in the Cerrado ecosystem.
650 $aCalopogonium Mucunoides
650 $aCerrado
650 $aDigestibilidade
650 $aLeguminosa Forrageira
700 1 $aCARVALHO, M. A.
773 $tJournal of Applied Seed Production, Corvallis$gv. 15, p. 17-21, 1997.
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