Nutrient fluxes and environmental performance indicators for a pasture-based dairy system.
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/1128592 |
Resumo: | The aim of this study was to evaluate the nutrient fluxes for lactating cows in a pasture-based dairy system and the impact of a nutritional management strategy on the environmental performance indicators. Fourteen lactating cows were divided into two experimental groups with seven animals each. The nutritional managements were a diet containing 20% crude protein (Group 1) and a diet with adjusted protein (Group 2). The nutrient budget was calculated on a monthly basis for nitrogen, phosphorus, and potassium. The nutritional strategy of adjusted protein reduces the total surplus in the lactation period for nitrogen by 7.6% and for phosphorus by 6.3%. The total potassium surplus of the adjusted protein group was 8.5% higher. The average nitrogen use efficiency was 21% for group 1 and 22.7% for group 2. Phosphorus use efficiency ranged from 13.4 to 35% for group 1 and from 15.5 to 34% for group 2 and potassium average use efficiency was 14.2% for group 1 and 12.6% for group 2. Nutritional management reduced nitrogen and phosphorus surpluses as well as the values of the environmental performance indicator. Based on this, it is possible to improve the environmental efficiency of dairy systems through improved nutritional management. |
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Nutrient fluxes and environmental performance indicators for a pasture-based dairy system.Lactating cowsProteinNitrogenPhosphorusPotassiumThe aim of this study was to evaluate the nutrient fluxes for lactating cows in a pasture-based dairy system and the impact of a nutritional management strategy on the environmental performance indicators. Fourteen lactating cows were divided into two experimental groups with seven animals each. The nutritional managements were a diet containing 20% crude protein (Group 1) and a diet with adjusted protein (Group 2). The nutrient budget was calculated on a monthly basis for nitrogen, phosphorus, and potassium. The nutritional strategy of adjusted protein reduces the total surplus in the lactation period for nitrogen by 7.6% and for phosphorus by 6.3%. The total potassium surplus of the adjusted protein group was 8.5% higher. The average nitrogen use efficiency was 21% for group 1 and 22.7% for group 2. Phosphorus use efficiency ranged from 13.4 to 35% for group 1 and from 15.5 to 34% for group 2 and potassium average use efficiency was 14.2% for group 1 and 12.6% for group 2. Nutritional management reduced nitrogen and phosphorus surpluses as well as the values of the environmental performance indicator. Based on this, it is possible to improve the environmental efficiency of dairy systems through improved nutritional management.JULIO CESAR PASCALE PALHARES, CPPSE; Taisla Inara Novelli, USP; Marcela Morelli, USP.PALHARES, J. C. P.NOVELLI, T. I.MORELLI, M.2020-12-23T09:02:05Z2020-12-23T09:02:05Z2020-12-222020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleActa Scientiarum. Animal Sciences, v. 42, e48615, p. 1-8, 2020.1807-8672http://www.alice.cnptia.embrapa.br/alice/handle/doc/112859210.4025/actascianimsci.v42i1.48615enginfo: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:EMBRAPA2020-12-23T09:02:11Zoai:www.alice.cnptia.embrapa.br:doc/1128592Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542020-12-23T09:02:11falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542020-12-23T09:02:11Repositório 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 fluxes and environmental performance indicators for a pasture-based dairy system. |
title |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
spellingShingle |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. PALHARES, J. C. P. Lactating cows Protein Nitrogen Phosphorus Potassium |
title_short |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
title_full |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
title_fullStr |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
title_full_unstemmed |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
title_sort |
Nutrient fluxes and environmental performance indicators for a pasture-based dairy system. |
author |
PALHARES, J. C. P. |
author_facet |
PALHARES, J. C. P. NOVELLI, T. I. MORELLI, M. |
author_role |
author |
author2 |
NOVELLI, T. I. MORELLI, M. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
JULIO CESAR PASCALE PALHARES, CPPSE; Taisla Inara Novelli, USP; Marcela Morelli, USP. |
dc.contributor.author.fl_str_mv |
PALHARES, J. C. P. NOVELLI, T. I. MORELLI, M. |
dc.subject.por.fl_str_mv |
Lactating cows Protein Nitrogen Phosphorus Potassium |
topic |
Lactating cows Protein Nitrogen Phosphorus Potassium |
description |
The aim of this study was to evaluate the nutrient fluxes for lactating cows in a pasture-based dairy system and the impact of a nutritional management strategy on the environmental performance indicators. Fourteen lactating cows were divided into two experimental groups with seven animals each. The nutritional managements were a diet containing 20% crude protein (Group 1) and a diet with adjusted protein (Group 2). The nutrient budget was calculated on a monthly basis for nitrogen, phosphorus, and potassium. The nutritional strategy of adjusted protein reduces the total surplus in the lactation period for nitrogen by 7.6% and for phosphorus by 6.3%. The total potassium surplus of the adjusted protein group was 8.5% higher. The average nitrogen use efficiency was 21% for group 1 and 22.7% for group 2. Phosphorus use efficiency ranged from 13.4 to 35% for group 1 and from 15.5 to 34% for group 2 and potassium average use efficiency was 14.2% for group 1 and 12.6% for group 2. Nutritional management reduced nitrogen and phosphorus surpluses as well as the values of the environmental performance indicator. Based on this, it is possible to improve the environmental efficiency of dairy systems through improved nutritional management. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-23T09:02:05Z 2020-12-23T09:02:05Z 2020-12-22 2020 |
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 |
Acta Scientiarum. Animal Sciences, v. 42, e48615, p. 1-8, 2020. 1807-8672 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1128592 10.4025/actascianimsci.v42i1.48615 |
identifier_str_mv |
Acta Scientiarum. Animal Sciences, v. 42, e48615, p. 1-8, 2020. 1807-8672 10.4025/actascianimsci.v42i1.48615 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1128592 |
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 |
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Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
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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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1794503499850973184 |