Nutrient status of cattle grazing systems in the western brazilian Amazon.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120545 |
Resumo: | 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. |
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Nutrient status of cattle grazing systems in the western brazilian Amazon.Nutrición animalPastoreandoEstatus nutricionalFertilidad del sueloAcreAmazônia OcidentalWestern AmazonAmazonia OccidentalNutrição AnimalPastagemEstado NutricionalFertilidade do SoloAnimal nutritionGrazingNutritional statusSoil fertilityLow-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.B. L. Rueda; K. C. McRoberts; R. W. Blake; C. F. Nicholson; JUDSON FERREIRA VALENTIM, CPAF-AC; E. C. M. Fernandes.RUEDA, B. L.McROBERTS, K. C.BLAKE, R. W.NICHOLSON, C. F.VALENTIM, J. F.FERNANDES, E. C. M.2020-02-22T00:38:56Z2020-02-22T00:38:56Z2020-02-2120202020-04-20T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleCogent Food & Agriculture, v. 6, 1722350, 2020.2331-1932http://www.alice.cnptia.embrapa.br/alice/handle/doc/112054510.1080/23311932.2020.1722350enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2020-02-22T00:39:03Zoai:www.alice.cnptia.embrapa.br:doc/1120545Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542020-02-22T00:39:03falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542020-02-22T00:39:03Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
title |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
spellingShingle |
Nutrient status of cattle grazing systems in the western brazilian Amazon. RUEDA, B. L. Nutrición animal Pastoreando Estatus nutricional Fertilidad del suelo Acre Amazônia Ocidental Western Amazon Amazonia Occidental Nutrição Animal Pastagem Estado Nutricional Fertilidade do Solo Animal nutrition Grazing Nutritional status Soil fertility |
title_short |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
title_full |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
title_fullStr |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
title_full_unstemmed |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
title_sort |
Nutrient status of cattle grazing systems in the western brazilian Amazon. |
author |
RUEDA, B. L. |
author_facet |
RUEDA, B. L. McROBERTS, K. C. BLAKE, R. W. NICHOLSON, C. F. VALENTIM, J. F. FERNANDES, E. C. M. |
author_role |
author |
author2 |
McROBERTS, K. C. BLAKE, R. W. NICHOLSON, C. F. VALENTIM, J. F. FERNANDES, E. C. M. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
B. L. Rueda; K. C. McRoberts; R. W. Blake; C. F. Nicholson; JUDSON FERREIRA VALENTIM, CPAF-AC; E. C. M. Fernandes. |
dc.contributor.author.fl_str_mv |
RUEDA, B. L. McROBERTS, K. C. BLAKE, R. W. NICHOLSON, C. F. VALENTIM, J. F. FERNANDES, E. C. M. |
dc.subject.por.fl_str_mv |
Nutrición animal Pastoreando Estatus nutricional Fertilidad del suelo Acre Amazônia Ocidental Western Amazon Amazonia Occidental Nutrição Animal Pastagem Estado Nutricional Fertilidade do Solo Animal nutrition Grazing Nutritional status Soil fertility |
topic |
Nutrición animal Pastoreando Estatus nutricional Fertilidad del suelo Acre Amazônia Ocidental Western Amazon Amazonia Occidental Nutrição Animal Pastagem Estado Nutricional Fertilidade do Solo Animal nutrition Grazing Nutritional status Soil fertility |
description |
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. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-22T00:38:56Z 2020-02-22T00:38:56Z 2020-02-21 2020 2020-04-20T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Cogent Food & Agriculture, v. 6, 1722350, 2020. 2331-1932 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120545 10.1080/23311932.2020.1722350 |
identifier_str_mv |
Cogent Food & Agriculture, v. 6, 1722350, 2020. 2331-1932 10.1080/23311932.2020.1722350 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120545 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503490534375424 |