| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
10/03/2017 |
|
Data da última atualização: |
20/05/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
JOSLIN, A.; MARKEWITZ, D.; MORRIS, L. A.; OLIVEIRA, F. de A.; KATO, O. R. |
|
Afiliação: |
Aaron Joslin, The University of Georgia; Daniel Markewitz, The University of Georgia; Lawrence A. Morris, The University of Georgia; Francisco de Assis Oliveira, UFRA; OSVALDO RYOHEI KATO, CPATU. |
|
Título: |
Improved fallow: growth and nitrogen accumulation of five native tree species in Brazil. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, v. 106, n. 1, p 1-15, Sep. 2016. |
|
DOI: |
10.1007/s10705-016-9783-0 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Small-holding farmers of the Brazilian Amazon often use a rotation of secondary forest, slash-and-burn land-clearing and fallow phase regeneration for agriculture. In recent decades reduction of the fallow phase from ~20 to ~5 years has limited nutrient accumulation by fallow vegetation to sustain future crop growth. Slash-and-mulch and improved fallow schemes, including use of native nitrogen-fixing species, have been investigated to address the issue. In the current study in eastern Amazonia of Brazil, a 7-year old forest site was slash-and-mulched and four treatments applied; no fertilizer and no N-fixer as the control; no fertilizer with N-fixer; P + K fertilizer with no N-fixer; P + K fertilizer with N-fixer. Manioc was planted in all plots at establishment. After manioc harvest and 4 years of fallow, a total of 6 years after planting, use of P + K fertilizer increased tree growth of four of five planted species. In the presence of the N-fixer I. edulis, trends of increased growth and survival among these four tree species were observed. After 6 years, fertilization with P + K significantly increased tree volume and biomass. The N-fixer lowered survival of other species yet increased estimated N uptake of planted trees. Use of P + K fertilizer without N-fixer might allow for commercial harvest of S. amazonicum at the end of one 7-year crop-fallow cycle without jeopardizing agroecosystem N stocks. Use of P + K fertilizer in the presence of I. edulis can increase planted-tree N-content but increases in competition may limit commercial harvest yet may better sustain future food crop growth. MenosSmall-holding farmers of the Brazilian Amazon often use a rotation of secondary forest, slash-and-burn land-clearing and fallow phase regeneration for agriculture. In recent decades reduction of the fallow phase from ~20 to ~5 years has limited nutrient accumulation by fallow vegetation to sustain future crop growth. Slash-and-mulch and improved fallow schemes, including use of native nitrogen-fixing species, have been investigated to address the issue. In the current study in eastern Amazonia of Brazil, a 7-year old forest site was slash-and-mulched and four treatments applied; no fertilizer and no N-fixer as the control; no fertilizer with N-fixer; P + K fertilizer with no N-fixer; P + K fertilizer with N-fixer. Manioc was planted in all plots at establishment. After manioc harvest and 4 years of fallow, a total of 6 years after planting, use of P + K fertilizer increased tree growth of four of five planted species. In the presence of the N-fixer I. edulis, trends of increased growth and survival among these four tree species were observed. After 6 years, fertilization with P + K significantly increased tree volume and biomass. The N-fixer lowered survival of other species yet increased estimated N uptake of planted trees. Use of P + K fertilizer without N-fixer might allow for commercial harvest of S. amazonicum at the end of one 7-year crop-fallow cycle without jeopardizing agroecosystem N stocks. Use of P + K fertilizer in the presence of I. edulis can increase planted-... Mostrar Tudo |
|
Palavras-Chave: |
Espécie arbórea. |
|
Thesagro: |
Nitrogênio; Pousio. |
|
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
|
Marc: |
LEADER 02274naa a2200217 a 4500
001 2066731
005 2022-05-20
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s10705-016-9783-0$2DOI
100 1 $aJOSLIN, A.
245 $aImproved fallow$bgrowth and nitrogen accumulation of five native tree species in Brazil.$h[electronic resource]
260 $c2016
520 $aSmall-holding farmers of the Brazilian Amazon often use a rotation of secondary forest, slash-and-burn land-clearing and fallow phase regeneration for agriculture. In recent decades reduction of the fallow phase from ~20 to ~5 years has limited nutrient accumulation by fallow vegetation to sustain future crop growth. Slash-and-mulch and improved fallow schemes, including use of native nitrogen-fixing species, have been investigated to address the issue. In the current study in eastern Amazonia of Brazil, a 7-year old forest site was slash-and-mulched and four treatments applied; no fertilizer and no N-fixer as the control; no fertilizer with N-fixer; P + K fertilizer with no N-fixer; P + K fertilizer with N-fixer. Manioc was planted in all plots at establishment. After manioc harvest and 4 years of fallow, a total of 6 years after planting, use of P + K fertilizer increased tree growth of four of five planted species. In the presence of the N-fixer I. edulis, trends of increased growth and survival among these four tree species were observed. After 6 years, fertilization with P + K significantly increased tree volume and biomass. The N-fixer lowered survival of other species yet increased estimated N uptake of planted trees. Use of P + K fertilizer without N-fixer might allow for commercial harvest of S. amazonicum at the end of one 7-year crop-fallow cycle without jeopardizing agroecosystem N stocks. Use of P + K fertilizer in the presence of I. edulis can increase planted-tree N-content but increases in competition may limit commercial harvest yet may better sustain future food crop growth.
650 $aNitrogênio
650 $aPousio
653 $aEspécie arbórea
700 1 $aMARKEWITZ, D.
700 1 $aMORRIS, L. A.
700 1 $aOLIVEIRA, F. de A.
700 1 $aKATO, O. R.
773 $tNutrient Cycling in Agroecosystems$gv. 106, n. 1, p 1-15, Sep. 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
14/12/2010 |
|
Data da última atualização: |
25/11/2021 |
|
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
|
Autoria: |
GOMES JUNIOR, R. A.; YOKOYAMA, R. Y.; BENTES, C. |
|
Afiliação: |
RUI ALBERTO GOMES JUNIOR, CPATU; ROBERTO Y. YOKOYAMA, DENPASA; CARLOS BENTES, DENPASA. |
|
Título: |
Manejo da cobertura vegetal na cultura da palma de óleo. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
In: GOMES JUNIOR, R. A. (Ed.). Bases técnicas para a cultura da palma de óleo integrado na unidade produtiva da agricultura familiar. Belém, PA: Embrapa Amazônia Oriental, 2010. |
|
Páginas: |
p. 3-6. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Palma de óleo. |
|
Thesagro: |
Manejo. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/172669/1/doc95.pdf
|
|
Marc: |
LEADER 00588naa a2200169 a 4500
001 1869664
005 2021-11-25
008 2010 bl uuuu u00u1 u #d
100 1 $aGOMES JUNIOR, R. A.
245 $aManejo da cobertura vegetal na cultura da palma de óleo.
260 $c2010
300 $ap. 3-6.
650 $aManejo
653 $aPalma de óleo
700 1 $aYOKOYAMA, R. Y.
700 1 $aBENTES, C.
773 $tIn: GOMES JUNIOR, R. A. (Ed.). Bases técnicas para a cultura da palma de óleo integrado na unidade produtiva da agricultura familiar. Belém, PA: Embrapa Amazônia Oriental, 2010.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
