| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
08/05/2019 |
|
Data da última atualização: |
20/08/2019 |
|
Autoria: |
CATUCHI, T. A.; SORATTO, R. P.; FRANCISQUINI JÚNIOR, A.; GUIDORIZZI, F. V. C.; TIRITAN, C. S. |
|
Afiliação: |
Tiago Aranda Catuchi, Universidade do Oeste Paulista - UNOESTE; Rogério Peres Soratto, Universidade Estadual Paulista - unesp/Faculdade de Ciências Agronômicas/Departamento de Produção e Melhoramento Vegetal; Amarildo Francisquini Júnior, Universidade do Oeste Paulista - UNOESTE; Fernando Vieira Costa Guidorizzi, Universidade Estadual Paulista - unesp/Faculdade de Ciências Agronômicas/Departamento de Produção e Melhoramento Vegetal; Carlos Sérgio Tiritan, Universidade do Oeste Paulista - UNOESTE. |
|
Título: |
Nitrogen management of forage grasses for nutrition, seed production, and nutrients in residual straw. |
|
Ano de publicação: |
2019 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 54, e00114, 2019. |
|
Idioma: |
Inglês |
|
Notas: |
Título em português: Manejo do nitrogênio em gramíneas forrageiras quanto à nutrição, produção de sementes e nutrientes na palhada residual. |
|
Conteúdo: |
The objective of this work was to evaluate the nutrition, accumulation of nutrients in residual straw, pure seed yield, and seed quality of the tropical forage grasses 'Mombaça' and 'Xaraés' subjected to topdressing with nitrogen fertilizer management. Field experiments were carried out in the municipalities of Rancharia and Presidente Prudente, in the state of São Paulo, Brazil. The treatments included a control (without N topdressing) and four N fractionation forms at different forage stages: 150 kg ha-1 N, at the vegetative phase (VP); 150 kg ha-1 N, at the beginning of the reproductive phase (RP), between panicle initiation and the prebooting stages; 100 kg ha-1 N, at VP plus 50 kg ha-1 N at RP; and 50 kg ha-1 N at VP plus 100 kg ha-1 N at RP. Fertilization with N as topdressing, regardless of the N fractionation form, increased N concentration in the flag leaf and in residual straw, and the quantities of N accumulated by 'Mombaça' and 'Xaraés' forage grasses. The application of all or most N in the VP increased the quantities of residual straw and of P and K accumulated by the 'Mombaça' forage grasses. The application of all or most N in the RP provided a greater pure seed yield and N use efficiency in both forage grasses. The seed physiological quality of the forages is not affected by fertilization with N topdressing. |
|
Palavras-Chave: |
Acúmulo de nutriente; Adubação nitrogenada; Nitrogen fertilization; Time of application. |
|
Thesagro: |
Época de Aplicação. |
|
Thesaurus Nal: |
Megathyrsus maximus; Urochloa brizantha. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/197092/1/Nitrogen-management-of-forage-grasses.pdf
|
|
Marc: |
LEADER 02324naa a2200265 a 4500
001 2108864
005 2019-08-20
008 2019 bl uuuu u00u1 u #d
100 1 $aCATUCHI, T. A.
245 $aNitrogen management of forage grasses for nutrition, seed production, and nutrients in residual straw.$h[electronic resource]
260 $c2019
500 $aTítulo em português: Manejo do nitrogênio em gramíneas forrageiras quanto à nutrição, produção de sementes e nutrientes na palhada residual.
520 $aThe objective of this work was to evaluate the nutrition, accumulation of nutrients in residual straw, pure seed yield, and seed quality of the tropical forage grasses 'Mombaça' and 'Xaraés' subjected to topdressing with nitrogen fertilizer management. Field experiments were carried out in the municipalities of Rancharia and Presidente Prudente, in the state of São Paulo, Brazil. The treatments included a control (without N topdressing) and four N fractionation forms at different forage stages: 150 kg ha-1 N, at the vegetative phase (VP); 150 kg ha-1 N, at the beginning of the reproductive phase (RP), between panicle initiation and the prebooting stages; 100 kg ha-1 N, at VP plus 50 kg ha-1 N at RP; and 50 kg ha-1 N at VP plus 100 kg ha-1 N at RP. Fertilization with N as topdressing, regardless of the N fractionation form, increased N concentration in the flag leaf and in residual straw, and the quantities of N accumulated by 'Mombaça' and 'Xaraés' forage grasses. The application of all or most N in the VP increased the quantities of residual straw and of P and K accumulated by the 'Mombaça' forage grasses. The application of all or most N in the RP provided a greater pure seed yield and N use efficiency in both forage grasses. The seed physiological quality of the forages is not affected by fertilization with N topdressing.
650 $aMegathyrsus maximus
650 $aUrochloa brizantha
650 $aÉpoca de Aplicação
653 $aAcúmulo de nutriente
653 $aAdubação nitrogenada
653 $aNitrogen fertilization
653 $aTime of application
700 1 $aSORATTO, R. P.
700 1 $aFRANCISQUINI JÚNIOR, A.
700 1 $aGUIDORIZZI, F. V. C.
700 1 $aTIRITAN, C. S.
773 $tPesquisa Agropecuária Brasileira$gv. 54, e00114, 2019.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Rondônia. |
|
Data corrente: |
06/02/2018 |
|
Data da última atualização: |
06/02/2018 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
VARGAS, L. A.; PASSOS, A. M. A.; MARCILIO, V. A.; BRUGNERA, F. A.; LEITE, V. P. D.; COSTA, R. S. C. da. |
|
Afiliação: |
ROGERIO SEBASTIAO CORREA DA COSTA, CPAF-Rondonia. |
|
Título: |
Soil seed bank phytosociology in no-tillage systems in the Southwestern Amazon Region. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
American Journal of Plant Sciences, v. 8, p. 3399-3413, 2017. |
|
DOI: |
10.4236/ajps.2017.813228 |
|
Idioma: |
Português |
|
Conteúdo: |
Understanding the ecological dynamics of weed populations in no-tillage systems is important to establish strategies for integrated weed control capable of increasing agroecosystem sustainability. This study sought to evaluate the effect of succession systems on the seed bank in a no-tillage system. The effects of fifteen succession systems, composed of seven grasses, seven Leguminosae , and a fallow condition, were evaluated on the seed bank at two soil depths (0 to 10 and 10 to 20 cm). The species found in the seed bank were quantified and identified by species and family. The precision of sampling, density, dominance, the indices of diversity of Simpson and Shannon-Weiner; index of sustainability; analysis of groupings of dissimilarities; and the value of importance of each species were calculated. High weed diversity was observed; 29 species were counted, including members of 12 different families. The highest expression of weeds was observed at soil depths of 0 to 10 cm. The Simpson and Shannon-Weiner coefficients indicated high diversity in both systems of succession. The index of sustainability did not indicate significant alterations in the different systems of succession. The coefficients of confenetic correlation were 0.74% and 0.82% for the 0 - 10 and the 10 - 20 cm soil depths respectively. It is concluded that there is a high diversity of weeds in the agroecosystems of Amazonia, and different cover crops promote modifications in the community and expression of the weeds? seed bank. MenosUnderstanding the ecological dynamics of weed populations in no-tillage systems is important to establish strategies for integrated weed control capable of increasing agroecosystem sustainability. This study sought to evaluate the effect of succession systems on the seed bank in a no-tillage system. The effects of fifteen succession systems, composed of seven grasses, seven Leguminosae , and a fallow condition, were evaluated on the seed bank at two soil depths (0 to 10 and 10 to 20 cm). The species found in the seed bank were quantified and identified by species and family. The precision of sampling, density, dominance, the indices of diversity of Simpson and Shannon-Weiner; index of sustainability; analysis of groupings of dissimilarities; and the value of importance of each species were calculated. High weed diversity was observed; 29 species were counted, including members of 12 different families. The highest expression of weeds was observed at soil depths of 0 to 10 cm. The Simpson and Shannon-Weiner coefficients indicated high diversity in both systems of succession. The index of sustainability did not indicate significant alterations in the different systems of succession. The coefficients of confenetic correlation were 0.74% and 0.82% for the 0 - 10 and the 10 - 20 cm soil depths respectively. It is concluded that there is a high diversity of weeds in the agroecosystems of Amazonia, and different cover crops promote modifications in the community and expression of t... Mostrar Tudo |
|
Palavras-Chave: |
Fitossociologia; Sorghum sudanense. |
|
Thesagro: |
Plantio direto. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/169382/1/Soil-seed.pdf
|
|
Marc: |
LEADER 02220naa a2200229 a 4500
001 2087214
005 2018-02-06
008 2017 bl --- 0-- u #d
024 7 $a10.4236/ajps.2017.813228$2DOI
100 1 $aVARGAS, L. A.
245 $aSoil seed bank phytosociology in no-tillage systems in the Southwestern Amazon Region.$h[electronic resource]
260 $c2017
520 $aUnderstanding the ecological dynamics of weed populations in no-tillage systems is important to establish strategies for integrated weed control capable of increasing agroecosystem sustainability. This study sought to evaluate the effect of succession systems on the seed bank in a no-tillage system. The effects of fifteen succession systems, composed of seven grasses, seven Leguminosae , and a fallow condition, were evaluated on the seed bank at two soil depths (0 to 10 and 10 to 20 cm). The species found in the seed bank were quantified and identified by species and family. The precision of sampling, density, dominance, the indices of diversity of Simpson and Shannon-Weiner; index of sustainability; analysis of groupings of dissimilarities; and the value of importance of each species were calculated. High weed diversity was observed; 29 species were counted, including members of 12 different families. The highest expression of weeds was observed at soil depths of 0 to 10 cm. The Simpson and Shannon-Weiner coefficients indicated high diversity in both systems of succession. The index of sustainability did not indicate significant alterations in the different systems of succession. The coefficients of confenetic correlation were 0.74% and 0.82% for the 0 - 10 and the 10 - 20 cm soil depths respectively. It is concluded that there is a high diversity of weeds in the agroecosystems of Amazonia, and different cover crops promote modifications in the community and expression of the weeds? seed bank.
650 $aPlantio direto
653 $aFitossociologia
653 $aSorghum sudanense
700 1 $aPASSOS, A. M. A.
700 1 $aMARCILIO, V. A.
700 1 $aBRUGNERA, F. A.
700 1 $aLEITE, V. P. D.
700 1 $aCOSTA, R. S. C. da
773 $tAmerican Journal of Plant Sciences$gv. 8, p. 3399-3413, 2017.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Rondônia (CPAF-RO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
