Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems.
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/1113482 https://doi.org/10.1016/j.scitotenv.2019.04.186 |
Resumo: | Greenhouse gases emissions are considered one of the most important environmental issues of dairy farming systems. Nitrous oxide (N2O) has particular importance owing to its global warming potential and stratospheric ozone depletion. The objective of this study was to investigate the influence of two rotational grazing strategies characterized by two pre-grazing targets (95% and maximum canopy light interception; LI95% and LIMax, respectively) on milk production efficiency and N2O fluxes from soil in a tropical dairy farming system based on elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Results indicated that LI95% pre-grazing target provided more frequent defoliations than LIMax.Water-filled pore space, soil and chamber temperatures were affected by sampling periods (P1 and P2). There was a significant pre-grazing target treatment × sampling period interaction effect on soil NH4 + concentration, which was most likely associated with urinary-N discharge. During P1, there was a greater urinary-N discharge for LI95% than LIMax (26.3 vs. 20.9 kg of urinary-N/paddock) caused by higher stocking rate, which resulted in greater N2O fluxes for LI95%. Inversely, during P2, the soil NH4 + and N2O fluxes were greater for LIMax than LI95%. During this period, the greater urinary-N discharge (46.8 vs. 44.8 kg of urinary N/paddock) was likely associated with longer stocking period for LIMax relative to LI95%, since both treatments had similar stocking rate. Converting hourly N2O fluxes to daily basis and relating to milk production efficiency, LI95% was 40% more efficient than LIMax (0.34 vs. 0.57 g N˗N2O/kg milk·ha). In addition, LI95% pre-grazing target decreased urea-N loading per milk production by 34%. Strategic grazing management represented by the LI95% pre-grazing target allows for intensification of tropical pasture-based dairy systems, enhanced milk production efficiency and decreased N-N2O emission intensity. |
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Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems.Canopy light interceptionNitrous oxide fluxesGrazed soilsSoil nitrogenSustainable intensificationElephant grassDairy farming systemsCapim ElefantePastagemGreenhouse gasesGreenhouse gases emissions are considered one of the most important environmental issues of dairy farming systems. Nitrous oxide (N2O) has particular importance owing to its global warming potential and stratospheric ozone depletion. The objective of this study was to investigate the influence of two rotational grazing strategies characterized by two pre-grazing targets (95% and maximum canopy light interception; LI95% and LIMax, respectively) on milk production efficiency and N2O fluxes from soil in a tropical dairy farming system based on elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Results indicated that LI95% pre-grazing target provided more frequent defoliations than LIMax.Water-filled pore space, soil and chamber temperatures were affected by sampling periods (P1 and P2). There was a significant pre-grazing target treatment × sampling period interaction effect on soil NH4 + concentration, which was most likely associated with urinary-N discharge. During P1, there was a greater urinary-N discharge for LI95% than LIMax (26.3 vs. 20.9 kg of urinary-N/paddock) caused by higher stocking rate, which resulted in greater N2O fluxes for LI95%. Inversely, during P2, the soil NH4 + and N2O fluxes were greater for LIMax than LI95%. During this period, the greater urinary-N discharge (46.8 vs. 44.8 kg of urinary N/paddock) was likely associated with longer stocking period for LIMax relative to LI95%, since both treatments had similar stocking rate. Converting hourly N2O fluxes to daily basis and relating to milk production efficiency, LI95% was 40% more efficient than LIMax (0.34 vs. 0.57 g N˗N2O/kg milk·ha). In addition, LI95% pre-grazing target decreased urea-N loading per milk production by 34%. Strategic grazing management represented by the LI95% pre-grazing target allows for intensification of tropical pasture-based dairy systems, enhanced milk production efficiency and decreased N-N2O emission intensity.Guilhermo F. S. Congio, USP/ESALQ; Marília B. Chiavegato, USP/ESALQ; Camila D. A. Batalha, USP/ESALQ; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; Thomas M. R. Maxwell, Lincoln University; Pablo Gregorini, Lincoln University; Sila C. Da Silva, USP/ESALQ.CONGIO, G. F. S.CHIAVEGATO, M. B.BATALHA, C. D. A.OLIVEIRA, P. P. A.MAXWELL, T. M. R.GREGORINI, P.SILVA, S. C. da2019-10-25T18:08:43Z2019-10-25T18:08:43Z2019-10-2520192019-10-25T18:08:43Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleScience of the Total Environment, v. 676, p. 493-500, 2019.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113482https://doi.org/10.1016/j.scitotenv.2019.04.186enginfo: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:EMBRAPA2019-10-25T18:08:50Zoai:www.alice.cnptia.embrapa.br:doc/1113482Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542019-10-25T18:08:50falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542019-10-25T18:08:50Repositório 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 |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
title |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
spellingShingle |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. CONGIO, G. F. S. Canopy light interception Nitrous oxide fluxes Grazed soils Soil nitrogen Sustainable intensification Elephant grass Dairy farming systems Capim Elefante Pastagem Greenhouse gases |
title_short |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
title_full |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
title_fullStr |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
title_full_unstemmed |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
title_sort |
Strategic grazing management and nitrous oxide fluxes from pasture soils in tropical dairy systems. |
author |
CONGIO, G. F. S. |
author_facet |
CONGIO, G. F. S. CHIAVEGATO, M. B. BATALHA, C. D. A. OLIVEIRA, P. P. A. MAXWELL, T. M. R. GREGORINI, P. SILVA, S. C. da |
author_role |
author |
author2 |
CHIAVEGATO, M. B. BATALHA, C. D. A. OLIVEIRA, P. P. A. MAXWELL, T. M. R. GREGORINI, P. SILVA, S. C. da |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Guilhermo F. S. Congio, USP/ESALQ; Marília B. Chiavegato, USP/ESALQ; Camila D. A. Batalha, USP/ESALQ; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; Thomas M. R. Maxwell, Lincoln University; Pablo Gregorini, Lincoln University; Sila C. Da Silva, USP/ESALQ. |
dc.contributor.author.fl_str_mv |
CONGIO, G. F. S. CHIAVEGATO, M. B. BATALHA, C. D. A. OLIVEIRA, P. P. A. MAXWELL, T. M. R. GREGORINI, P. SILVA, S. C. da |
dc.subject.por.fl_str_mv |
Canopy light interception Nitrous oxide fluxes Grazed soils Soil nitrogen Sustainable intensification Elephant grass Dairy farming systems Capim Elefante Pastagem Greenhouse gases |
topic |
Canopy light interception Nitrous oxide fluxes Grazed soils Soil nitrogen Sustainable intensification Elephant grass Dairy farming systems Capim Elefante Pastagem Greenhouse gases |
description |
Greenhouse gases emissions are considered one of the most important environmental issues of dairy farming systems. Nitrous oxide (N2O) has particular importance owing to its global warming potential and stratospheric ozone depletion. The objective of this study was to investigate the influence of two rotational grazing strategies characterized by two pre-grazing targets (95% and maximum canopy light interception; LI95% and LIMax, respectively) on milk production efficiency and N2O fluxes from soil in a tropical dairy farming system based on elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Results indicated that LI95% pre-grazing target provided more frequent defoliations than LIMax.Water-filled pore space, soil and chamber temperatures were affected by sampling periods (P1 and P2). There was a significant pre-grazing target treatment × sampling period interaction effect on soil NH4 + concentration, which was most likely associated with urinary-N discharge. During P1, there was a greater urinary-N discharge for LI95% than LIMax (26.3 vs. 20.9 kg of urinary-N/paddock) caused by higher stocking rate, which resulted in greater N2O fluxes for LI95%. Inversely, during P2, the soil NH4 + and N2O fluxes were greater for LIMax than LI95%. During this period, the greater urinary-N discharge (46.8 vs. 44.8 kg of urinary N/paddock) was likely associated with longer stocking period for LIMax relative to LI95%, since both treatments had similar stocking rate. Converting hourly N2O fluxes to daily basis and relating to milk production efficiency, LI95% was 40% more efficient than LIMax (0.34 vs. 0.57 g N˗N2O/kg milk·ha). In addition, LI95% pre-grazing target decreased urea-N loading per milk production by 34%. Strategic grazing management represented by the LI95% pre-grazing target allows for intensification of tropical pasture-based dairy systems, enhanced milk production efficiency and decreased N-N2O emission intensity. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-25T18:08:43Z 2019-10-25T18:08:43Z 2019-10-25 2019 2019-10-25T18:08:43Z |
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 |
Science of the Total Environment, v. 676, p. 493-500, 2019. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113482 https://doi.org/10.1016/j.scitotenv.2019.04.186 |
identifier_str_mv |
Science of the Total Environment, v. 676, p. 493-500, 2019. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113482 https://doi.org/10.1016/j.scitotenv.2019.04.186 |
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 |
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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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1794503482294665216 |