| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrossilvipastoril; Embrapa Solos. |
|
Data corrente: |
22/06/2020 |
|
Data da última atualização: |
28/01/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
NASCIMENTO, A. F. do; OLIVEIRA, C. M. de; PEDREIRA, B. C. e; PEREIRA, D. H.; RODRIGUES, R. de A. R. |
|
Afiliação: |
ALEXANDRE FERREIRA DO NASCIMENTO, CPAMT; CARINE MOREIRA DE OLIVEIRA, UFMT; BRUNO CARNEIRO E PEDREIRA, CPAMT; DALTON HENRIQUE PEREIRA, UFMT; RENATO DE ARAGAO RIBEIRO RODRIGUES, CNPS. |
|
Título: |
Nitrous oxide emissions and forage accumulation in the Brazilian Amazon forage-livestock systems submitted to N input strategies. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Grassland Science, v. 67, n. 1, p. 63-72, Jan. 2021 |
|
DOI: |
https://doi.org/10.1111/grs.12287 |
|
Idioma: |
Inglês |
|
Conteúdo: |
In the Brazilian Amazon, nitrogen input strategies are required to maintain forage-livestock systems productivity. However, greenhouse gases (GHG) emissions mitigation from tropical soils is also a global demand. This research aims to assess productivity and nitrous oxide (N2O) emissions from Oxisol cultivated with Marandu palisade grass (Brachiaria brizantha [Hochst. Ex A.Rich.] Stapf) submitted to nitrogen (N) input strategies (N fertilization and biological N fixation) in the Brazilian Amazon. The treatments were the following: control (unfertilized); U40 (fertilized with 40 kg N/ha as urea); U80 (fertilized with 80 kg N/ha as urea); AS40 (fertilized with 40 kg N/ha as ammonium sulfate); AS80 (fertilized with 80 kg N/ha as ammonium sulfate); and IAB (inoculated with Azospirillum brasilense ). From January to March 2016, soil N2O emission, forage accumulation (FA) and relative emission (RE) were assessed during two 28-day cycles. The FA was greater in the U80 and AS80 than in control and IAB. The highest peaks of soil N2O flux occurred from 4 to 7 days after N fertilization, primarily in the highest N rates treatments. Overall, 40 kg N/ha resulted in higher N2O flux than control and IAB, which were lower than 80 kg N/ha regardless of the N source. The lowest fluxes occurred in the control and IAB (below 20 ug N-N2O m-2 hr-1). All of the emission factors (EF) calculated for both fertilizers and rates were lower than 0.35%, which is below the 1% established by the IPCC. Our results indicate the need for discussion of the EF in the pasture intensification to contribute to avoid deforestation and mitigating emissions. The inputs of 40 kg N/ha per application with urea or ammonium sulfate, due to the low EF and RE, are recommended as a pasture N input strategy in the Brazilian Amazon. MenosIn the Brazilian Amazon, nitrogen input strategies are required to maintain forage-livestock systems productivity. However, greenhouse gases (GHG) emissions mitigation from tropical soils is also a global demand. This research aims to assess productivity and nitrous oxide (N2O) emissions from Oxisol cultivated with Marandu palisade grass (Brachiaria brizantha [Hochst. Ex A.Rich.] Stapf) submitted to nitrogen (N) input strategies (N fertilization and biological N fixation) in the Brazilian Amazon. The treatments were the following: control (unfertilized); U40 (fertilized with 40 kg N/ha as urea); U80 (fertilized with 80 kg N/ha as urea); AS40 (fertilized with 40 kg N/ha as ammonium sulfate); AS80 (fertilized with 80 kg N/ha as ammonium sulfate); and IAB (inoculated with Azospirillum brasilense ). From January to March 2016, soil N2O emission, forage accumulation (FA) and relative emission (RE) were assessed during two 28-day cycles. The FA was greater in the U80 and AS80 than in control and IAB. The highest peaks of soil N2O flux occurred from 4 to 7 days after N fertilization, primarily in the highest N rates treatments. Overall, 40 kg N/ha resulted in higher N2O flux than control and IAB, which were lower than 80 kg N/ha regardless of the N source. The lowest fluxes occurred in the control and IAB (below 20 ug N-N2O m-2 hr-1). All of the emission factors (EF) calculated for both fertilizers and rates were lower than 0.35%, which is below the 1% established by the IPCC. Our ... Mostrar Tudo |
|
Palavras-Chave: |
Mitigação. |
|
Thesagro: |
Fertilizante; Mudança Climática; Pecuária. |
|
Thesaurus Nal: |
Climate change; Fertilizers; Livestock. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/230695/1/2021-cpamt-bcp-nitroux-oxide-emissions-forage-accumulation-brazilian-amazon-forage-livestock-systems-input-strategies.pdf
|
|
Marc: |
LEADER 02644naa a2200265 a 4500
001 2129729
005 2022-01-28
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1111/grs.12287$2DOI
100 1 $aNASCIMENTO, A. F. do
245 $aNitrous oxide emissions and forage accumulation in the Brazilian Amazon forage-livestock systems submitted to N input strategies.$h[electronic resource]
260 $c2021
520 $aIn the Brazilian Amazon, nitrogen input strategies are required to maintain forage-livestock systems productivity. However, greenhouse gases (GHG) emissions mitigation from tropical soils is also a global demand. This research aims to assess productivity and nitrous oxide (N2O) emissions from Oxisol cultivated with Marandu palisade grass (Brachiaria brizantha [Hochst. Ex A.Rich.] Stapf) submitted to nitrogen (N) input strategies (N fertilization and biological N fixation) in the Brazilian Amazon. The treatments were the following: control (unfertilized); U40 (fertilized with 40 kg N/ha as urea); U80 (fertilized with 80 kg N/ha as urea); AS40 (fertilized with 40 kg N/ha as ammonium sulfate); AS80 (fertilized with 80 kg N/ha as ammonium sulfate); and IAB (inoculated with Azospirillum brasilense ). From January to March 2016, soil N2O emission, forage accumulation (FA) and relative emission (RE) were assessed during two 28-day cycles. The FA was greater in the U80 and AS80 than in control and IAB. The highest peaks of soil N2O flux occurred from 4 to 7 days after N fertilization, primarily in the highest N rates treatments. Overall, 40 kg N/ha resulted in higher N2O flux than control and IAB, which were lower than 80 kg N/ha regardless of the N source. The lowest fluxes occurred in the control and IAB (below 20 ug N-N2O m-2 hr-1). All of the emission factors (EF) calculated for both fertilizers and rates were lower than 0.35%, which is below the 1% established by the IPCC. Our results indicate the need for discussion of the EF in the pasture intensification to contribute to avoid deforestation and mitigating emissions. The inputs of 40 kg N/ha per application with urea or ammonium sulfate, due to the low EF and RE, are recommended as a pasture N input strategy in the Brazilian Amazon.
650 $aClimate change
650 $aFertilizers
650 $aLivestock
650 $aFertilizante
650 $aMudança Climática
650 $aPecuária
653 $aMitigação
700 1 $aOLIVEIRA, C. M. de
700 1 $aPEDREIRA, B. C. e
700 1 $aPEREIRA, D. H.
700 1 $aRODRIGUES, R. de A. R.
773 $tGrassland Science$gv. 67, n. 1, p. 63-72, Jan. 2021
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrossilvipastoril (CPAMT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Semiárido. |
|
Data corrente: |
18/02/2021 |
|
Data da última atualização: |
18/02/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
ARAÚJO JÚNIOR, G. do N.; SILVA, T. G. F. da; SOUZA, L. S. B. de; SOUZA, M. de S.; ARAUJO, G. G. L. de; MOURA, M. S. B. de; SANTOS, J. P. A. de S.; JARDIM, A. M. da R. F.; ALVES, C. P.; ALVES, H. K. M. N. |
|
Afiliação: |
George do Nascimento Araújo Júnior; Thieres George Freire da Silva; Luciana Sandra Bastos de Souza; Marcondes de Sá Souza; GHERMAN GARCIA LEAL DE ARAUJO, CPATSA; MAGNA SOELMA BESERRA DE MOURA, CPATSA; João Pedro Alves de Souza Santos; Alexandre Maniçoba da Rosa Ferraz Jardim; Cleber Pereira Alves; Hygor Kristoph Muniz Nunes Alves. |
|
Título: |
Productivity, bromatological composition and economic benefits of using irrigation in the forage cactus under regulated deficit irrigation in a semiarid environment. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Bragantia, v. 80, jan. 2021. |
|
DOI: |
http://dx.doi.org/10.1590/1678-4499.20200390 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The use of irrigation can improve the productivity and nutritional quality of the forage cactus in environments with a water deficit, resulting in profit to the producer. The productive performance, bromatological composition and economic benefits of using irrigation were investigated in this study with forage cactus clones regulated deficit irrigation (RDI). The study was conducted in an experimental design of randomised blocks, in a factorial scheme with subdivided plots. The plots consisted of water regimes based on the crop evapotranspiration (ETc) (rainfed, 40, 80 and 120% ETc). The cactus clones [?Miúda? (MIU), ?Orelha de Elefante Mexicana? (OEM) and ?IPA Sertânia? (IPA)] comprised the subplots. The total number of cladodes per plant, the fresh and dry matter yields and the bromatological composition were evaluated. Economic viability was assessed using the net revenue and benefit to cost ratio (BCR). The irrigation depths did not increase the yield of the clones. The OEM clone showed 276 and 343% greater fresh and dry matter production, respectively, when compared to the IPA clone; however, when compared with the MIU clone, it was 63%, both on a fresh and dry matter production. The water regimes had no effect on the nutritional quality of the cactus. Only IPA showed no profit during the first cycle (BCR < 1). It can be concluded that planting one irrigated hectare with the OEM and MIU clones offer economic returns starting from the first production cycle (18 months). |
|
Palavras-Chave: |
Composição bromatológica; Déficit hídrico; Estresse hídrico; Viabilidade econômica. |
|
Thesagro: |
Irrigação; Opuntia Ficus Indica; Palma Forrageira; Pastagem. |
|
Thesaurus NAL: |
Opuntia ficus-indica; Pastures. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/221229/1/Productivity-bromatological-composition-and-economic-2021.pdf
|
|
Marc: |
LEADER 02671naa a2200361 a 4500
001 2130061
005 2021-02-18
008 2021 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/1678-4499.20200390$2DOI
100 1 $aARAÚJO JÚNIOR, G. do N.
245 $aProductivity, bromatological composition and economic benefits of using irrigation in the forage cactus under regulated deficit irrigation in a semiarid environment.$h[electronic resource]
260 $c2021
520 $aThe use of irrigation can improve the productivity and nutritional quality of the forage cactus in environments with a water deficit, resulting in profit to the producer. The productive performance, bromatological composition and economic benefits of using irrigation were investigated in this study with forage cactus clones regulated deficit irrigation (RDI). The study was conducted in an experimental design of randomised blocks, in a factorial scheme with subdivided plots. The plots consisted of water regimes based on the crop evapotranspiration (ETc) (rainfed, 40, 80 and 120% ETc). The cactus clones [?Miúda? (MIU), ?Orelha de Elefante Mexicana? (OEM) and ?IPA Sertânia? (IPA)] comprised the subplots. The total number of cladodes per plant, the fresh and dry matter yields and the bromatological composition were evaluated. Economic viability was assessed using the net revenue and benefit to cost ratio (BCR). The irrigation depths did not increase the yield of the clones. The OEM clone showed 276 and 343% greater fresh and dry matter production, respectively, when compared to the IPA clone; however, when compared with the MIU clone, it was 63%, both on a fresh and dry matter production. The water regimes had no effect on the nutritional quality of the cactus. Only IPA showed no profit during the first cycle (BCR < 1). It can be concluded that planting one irrigated hectare with the OEM and MIU clones offer economic returns starting from the first production cycle (18 months).
650 $aOpuntia ficus-indica
650 $aPastures
650 $aIrrigação
650 $aOpuntia Ficus Indica
650 $aPalma Forrageira
650 $aPastagem
653 $aComposição bromatológica
653 $aDéficit hídrico
653 $aEstresse hídrico
653 $aViabilidade econômica
700 1 $aSILVA, T. G. F. da
700 1 $aSOUZA, L. S. B. de
700 1 $aSOUZA, M. de S.
700 1 $aARAUJO, G. G. L. de
700 1 $aMOURA, M. S. B. de
700 1 $aSANTOS, J. P. A. de S.
700 1 $aJARDIM, A. M. da R. F.
700 1 $aALVES, C. P.
700 1 $aALVES, H. K. M. N.
773 $tBragantia$gv. 80, jan. 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Semiárido (CPATSA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
