|
|
Registro Completo |
Biblioteca(s): |
Embrapa Rondônia. |
Data corrente: |
08/04/2009 |
Data da última atualização: |
04/02/2015 |
Autoria: |
CARVALHO, H. W. L. de; CARDOSO, M. J.; ROCHA, L. M. P.; PACHECO, C. A. P.; OLIVEIRA, I. R. de; TABOSA, J. N.; LIRA, M. A.; OLIVEIRA, E. A. S.; NASCIMENTO, M. M. A. do; SIMPLÍCIO, J. B.; COUTINHO, G. V.; BRITO, A. R. de M. B.; TAVARES FILHO, J. J.; MELO, K. E. de O.; FEITOSA, L. F.; MENEZES, A. F.; RODRIGUES, C. S.; SILVA, B. S. de F. |
Afiliação: |
Hélio Wilson Lemos de Carvalho, Embrapa Tabuleiros Costeiros; Milton José Cardoso, Embrapa Meio-Norte; Leonardo Melo Pereira Rocha; Cleso Antônio Patto Pacheco, Embrapa Milho e Sorgo; Ivênio Rubens de Oliveira, Embrapa Tabuleiros Costeiros; José Nildo Ta. |
Título: |
Desempenho de cultivares de milho na região nordeste do Brasil : safra 2006/2007. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Aracaju: Embrapa Tabuleiros Costeiros, 2008. |
Páginas: |
7p. |
Série: |
(Embrapa Tabuleiros Costeiros. Comunicado Técnico, 76). |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Cultivar; Nordeste. |
Thesagro: |
Milho. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01076nam a2200373 a 4500 001 1709842 005 2015-02-04 008 2008 bl uuuu u0uu1 u #d 100 1 $aCARVALHO, H. W. L. de 245 $aDesempenho de cultivares de milho na região nordeste do Brasil$bsafra 2006/2007. 260 $aAracaju: Embrapa Tabuleiros Costeiros$c2008 300 $a7p. 490 $a(Embrapa Tabuleiros Costeiros. Comunicado Técnico, 76). 650 $aMilho 653 $aBrasil 653 $aCultivar 653 $aNordeste 700 1 $aCARDOSO, M. J. 700 1 $aROCHA, L. M. P. 700 1 $aPACHECO, C. A. P. 700 1 $aOLIVEIRA, I. R. de 700 1 $aTABOSA, J. N. 700 1 $aLIRA, M. A. 700 1 $aOLIVEIRA, E. A. S. 700 1 $aNASCIMENTO, M. M. A. do 700 1 $aSIMPLÍCIO, J. B. 700 1 $aCOUTINHO, G. V. 700 1 $aBRITO, A. R. de M. B. 700 1 $aTAVARES FILHO, J. J. 700 1 $aMELO, K. E. de O. 700 1 $aFEITOSA, L. F. 700 1 $aMENEZES, A. F. 700 1 $aRODRIGUES, C. S. 700 1 $aSILVA, B. S. de F.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Rondônia (CPAF-RO) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Acre; Embrapa Agropecuária Oeste. |
Data corrente: |
26/11/2009 |
Data da última atualização: |
12/12/2011 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
GOMES, J.; BAYER, C.; COSTA, F. de S.; PICCOLO, M. de C.; ZANATTA, J. A.; VIEIRA, F. C. B.; SIX, J. |
Afiliação: |
JULIANA GOMES, UFRGS; CIMÉLIO BAYER, UFRGS; FALBERNI DE SOUZA COSTA, CPAF-AC; MARISA DE CÁSSIA PÍCCOLO, CENA/USP; JOSILÉIA ACORDI ZANATTA, CPAO; FREDERICO COSA BEBER VIEIRA, UFP; JOHAN SIX, UNIVERSITY OF CALIFORNIA. |
Título: |
Soil nitrous oxide emissions in long-term cover crops-based rotations under subtropical climate. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Soil & Tillage Research, v. 106, n. 1, p. 36-44, Dec. 2009. |
DOI: |
10.1016/j.still.2009.10.001 |
Idioma: |
Inglês Português |
Conteúdo: |
It has been shown that cover crops can enhance soil nitrous oxide (N2O) emissions, but the magnitude of increase depends on the quantity and quality of the crop residues. Therefore, this study aimed to evaluate the effect of long-term (19 and 21 years) no-till maize crop rotations including grass [black oat (Avena strigosa Schreb)] and legume cover crops [vetch (Vigna sativa L.), cowpea (Vigna unguiculata L. Walp), pigeon pea (Cajanus cajan L. Millsp.) and lablab (Dolichos lablab)] on annual soil N2O emissions in a subtropical Acrisol in Southern Brazil. Greater soil N2O emissions were observed in the first 45 days after the cover crop residue management in all crop rotations, varying from -20.2 ± 1.9 to 163.9 ± 24.3 ug N m-2 h-1. Legume-based crop rotations had the largest cumulative emissions in this period, which were directly related to the quantity of N (r2 = 0.60, p = 0.13) and inversely related to the lignin:N ratio (r2 = 0.89, p = 0.01) of the cover crop residues. After this period, the mean fluxes were smaller and were closely related to the total soil N stocks (r2 = 0.96, p = 0.002). The annual soil N2O emission represented 0.39-0.75% of the total N added by the legume cover crops. Management-controlled soil variables such as mineral N (NO3- and NH4+) and dissolved organic C influenced more the N2O fluxes than environmental-related variables as water-filled pore space and air and soil temperature. Consequently, the synchronization between N mineralization and N uptake by plants seems to be the main challenge to reduce N2O emissions while maintaining the environmental and agronomic services provided by legume cover crops in agricultural systems. MenosIt has been shown that cover crops can enhance soil nitrous oxide (N2O) emissions, but the magnitude of increase depends on the quantity and quality of the crop residues. Therefore, this study aimed to evaluate the effect of long-term (19 and 21 years) no-till maize crop rotations including grass [black oat (Avena strigosa Schreb)] and legume cover crops [vetch (Vigna sativa L.), cowpea (Vigna unguiculata L. Walp), pigeon pea (Cajanus cajan L. Millsp.) and lablab (Dolichos lablab)] on annual soil N2O emissions in a subtropical Acrisol in Southern Brazil. Greater soil N2O emissions were observed in the first 45 days after the cover crop residue management in all crop rotations, varying from -20.2 ± 1.9 to 163.9 ± 24.3 ug N m-2 h-1. Legume-based crop rotations had the largest cumulative emissions in this period, which were directly related to the quantity of N (r2 = 0.60, p = 0.13) and inversely related to the lignin:N ratio (r2 = 0.89, p = 0.01) of the cover crop residues. After this period, the mean fluxes were smaller and were closely related to the total soil N stocks (r2 = 0.96, p = 0.002). The annual soil N2O emission represented 0.39-0.75% of the total N added by the legume cover crops. Management-controlled soil variables such as mineral N (NO3- and NH4+) and dissolved organic C influenced more the N2O fluxes than environmental-related variables as water-filled pore space and air and soil temperature. Consequently, the synchronization between N mineralization and N upt... Mostrar Tudo |
Palavras-Chave: |
Aveia preta; Caupi; Cero labranza; Clima subtropical; Cultivo de cobertura; Cultivos de cobertura; Emisiones de gases de efecto invernadero; Labe-labe; Legumbres; Manejo del suelo; Óxido nitroso; Pastos forrajeros; Rotación de cultivos; Subtrópico. |
Thesagro: |
Aveia forrageira; Avena strigosa; Cajanus cajan; Dolichos lablab; Efeito Estufa; Ervilhaça; Feijão de corda; Gramínea forrageira; Guandu; Leguminosa; Manejo do solo; Plantio direto; Rotação de cultura; Solo; Vicia sativa; Vigna unguiculata. |
Thesaurus NAL: |
Cover crops; Crop rotation; Forage grasses; Greenhouse gas emissions; Legumes; Nitrous oxide; No-tillage; Soil management; Subtropics. |
Categoria do assunto: |
-- P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/50000/1/14.pdf
|
Marc: |
LEADER 03529naa a2200673 a 4500 001 1580446 005 2011-12-12 008 2009 bl uuuu u00u1 u #d 024 7 $a10.1016/j.still.2009.10.001$2DOI 100 1 $aGOMES, J. 245 $aSoil nitrous oxide emissions in long-term cover crops-based rotations under subtropical climate.$h[electronic resource] 260 $c2009 520 $aIt has been shown that cover crops can enhance soil nitrous oxide (N2O) emissions, but the magnitude of increase depends on the quantity and quality of the crop residues. Therefore, this study aimed to evaluate the effect of long-term (19 and 21 years) no-till maize crop rotations including grass [black oat (Avena strigosa Schreb)] and legume cover crops [vetch (Vigna sativa L.), cowpea (Vigna unguiculata L. Walp), pigeon pea (Cajanus cajan L. Millsp.) and lablab (Dolichos lablab)] on annual soil N2O emissions in a subtropical Acrisol in Southern Brazil. Greater soil N2O emissions were observed in the first 45 days after the cover crop residue management in all crop rotations, varying from -20.2 ± 1.9 to 163.9 ± 24.3 ug N m-2 h-1. Legume-based crop rotations had the largest cumulative emissions in this period, which were directly related to the quantity of N (r2 = 0.60, p = 0.13) and inversely related to the lignin:N ratio (r2 = 0.89, p = 0.01) of the cover crop residues. After this period, the mean fluxes were smaller and were closely related to the total soil N stocks (r2 = 0.96, p = 0.002). The annual soil N2O emission represented 0.39-0.75% of the total N added by the legume cover crops. Management-controlled soil variables such as mineral N (NO3- and NH4+) and dissolved organic C influenced more the N2O fluxes than environmental-related variables as water-filled pore space and air and soil temperature. Consequently, the synchronization between N mineralization and N uptake by plants seems to be the main challenge to reduce N2O emissions while maintaining the environmental and agronomic services provided by legume cover crops in agricultural systems. 650 $aCover crops 650 $aCrop rotation 650 $aForage grasses 650 $aGreenhouse gas emissions 650 $aLegumes 650 $aNitrous oxide 650 $aNo-tillage 650 $aSoil management 650 $aSubtropics 650 $aAveia forrageira 650 $aAvena strigosa 650 $aCajanus cajan 650 $aDolichos lablab 650 $aEfeito Estufa 650 $aErvilhaça 650 $aFeijão de corda 650 $aGramínea forrageira 650 $aGuandu 650 $aLeguminosa 650 $aManejo do solo 650 $aPlantio direto 650 $aRotação de cultura 650 $aSolo 650 $aVicia sativa 650 $aVigna unguiculata 653 $aAveia preta 653 $aCaupi 653 $aCero labranza 653 $aClima subtropical 653 $aCultivo de cobertura 653 $aCultivos de cobertura 653 $aEmisiones de gases de efecto invernadero 653 $aLabe-labe 653 $aLegumbres 653 $aManejo del suelo 653 $aÓxido nitroso 653 $aPastos forrajeros 653 $aRotación de cultivos 653 $aSubtrópico 700 1 $aBAYER, C. 700 1 $aCOSTA, F. de S. 700 1 $aPICCOLO, M. de C. 700 1 $aZANATTA, J. A. 700 1 $aVIEIRA, F. C. B. 700 1 $aSIX, J. 773 $tSoil & Tillage Research$gv. 106, n. 1, p. 36-44, Dec. 2009.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|