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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
23/04/2003 |
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Data da última atualização: |
22/02/2024 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
FRANÇA-NETO, J. B.; KRZYZANOWSKI, F. C. |
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Afiliação: |
JOSE DE BARROS FRANCA NETO, CNPSO; FRANCISCO CARLOS KRZYZANOWSKI, CNPSO. |
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Título: |
Importancia da semente na produtividade da cultura da soja. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Informativo Brejeiro, n. 11, p. 14-15, 2002. |
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Idioma: |
Português |
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Thesagro: |
Semente; Soja. |
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Thesaurus Nal: |
Seeds; Soybeans. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 00445nam a2200157 a 4500
001 1463619
005 2024-02-22
008 2002 bl uuuu u00u1 u #d
100 1 $aFRANÇA-NETO, J. B.
245 $aImportancia da semente na produtividade da cultura da soja.$h[electronic resource]
260 $aInformativo Brejeiro, n. 11, p. 14-15$c2002
650 $aSeeds
650 $aSoybeans
650 $aSemente
650 $aSoja
700 1 $aKRZYZANOWSKI, F. C.
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Embrapa Soja (CNPSO) |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
15/12/2014 |
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Data da última atualização: |
15/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
AMORIM, L. B.; SALCEDO, I. H.; PAREYN, F. G. C.; ALVAREZ, I. A. |
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Afiliação: |
L. B. AMORIM, INSTITUTO NACIONAL DO SEMIÁRIDO; I. H. SALCEDO, INSTITUTO NACIONAL DO SEMIÁRIDO; F. G. C. PAREYN, ASSOCIAÇÃO PLANTAS DO NORDESTE; IVAN ANDRE ALVAREZ, CNPM. |
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Título: |
Assessment of nutrient returns in a tropical dry forest after clear-cut without burning. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, v. 100, n. 1, sep. 2014. |
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Páginas: |
p. 1-10 |
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ISBN: |
1385-1314 |
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DOI: |
10.1007/s10705-014-9646-5 |
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Idioma: |
Português |
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Conteúdo: |
Tropical dry forests (TDFs) are being deforested at unprecedented rates. The slash/burn/ agriculture/fallow-extensive livestock sequence causes significant nutrient losses and soil degradation. Our aim is to assess nutrient inputs and outputs in a TDF area under an alternative management system, for exclusive wood production. The study involved clear-cutting a preserved caatinga TDF site without burning, quantifying nutrients exported in firewood/ timber and nutrients returned to the soil from the litter layer plus the slash debris, left to decompose unburned on the soil surface. Before clear-cut, the litter layer on the forest floor contained 6.1 t ha of dry matter (DM). After clear-cut, the aboveground biomass was 61.9 t DM ha-1 (consisting of 21.5 t DM ha-1 of commercial wood and 40.4 t DM ha-1 of clear-cut debris that did not include the underlying litter layer). The litter layer was composed of fine and coarse litter, with turnovers of 0.86 and 0.31 year-1, respectively, separately measured in uncut control plots during two rainy seasons (Dec-2007/June-2008 and Dec-2008/ June-2009). In a single season, its decomposition returned to the soil 48.4, 1.16 and 12.3 kg ha-1 of N, P and K. The clear-cut debris was mainly composed of branches, 33.4 t ha-1, bromeliads, 5.63 t ha-1 and green leaves, 1.32 t ha-1. In-situ decomposition rates for branches and bromeliads were 0.24 and 1.47 year-1, respectively. After two rainy seasons the clear-cut debris released 206, 6.5 and 106 kg ha-1 of N, P and K respectively. This input plus that of the underlying litter layer exceeded exports in the commercial wood, and replenished a soil nutrient stock (0?30 cm) of approximately the same magnitude. MenosTropical dry forests (TDFs) are being deforested at unprecedented rates. The slash/burn/ agriculture/fallow-extensive livestock sequence causes significant nutrient losses and soil degradation. Our aim is to assess nutrient inputs and outputs in a TDF area under an alternative management system, for exclusive wood production. The study involved clear-cutting a preserved caatinga TDF site without burning, quantifying nutrients exported in firewood/ timber and nutrients returned to the soil from the litter layer plus the slash debris, left to decompose unburned on the soil surface. Before clear-cut, the litter layer on the forest floor contained 6.1 t ha of dry matter (DM). After clear-cut, the aboveground biomass was 61.9 t DM ha-1 (consisting of 21.5 t DM ha-1 of commercial wood and 40.4 t DM ha-1 of clear-cut debris that did not include the underlying litter layer). The litter layer was composed of fine and coarse litter, with turnovers of 0.86 and 0.31 year-1, respectively, separately measured in uncut control plots during two rainy seasons (Dec-2007/June-2008 and Dec-2008/ June-2009). In a single season, its decomposition returned to the soil 48.4, 1.16 and 12.3 kg ha-1 of N, P and K. The clear-cut debris was mainly composed of branches, 33.4 t ha-1, bromeliads, 5.63 t ha-1 and green leaves, 1.32 t ha-1. In-situ decomposition rates for branches and bromeliads were 0.24 and 1.47 year-1, respectively. After two rainy seasons the clear-cut debris released 206, 6.5 and 106 kg... Mostrar Tudo |
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Palavras-Chave: |
Debris decomposition; Litter decomposition; Nutrient cycling. |
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Thesagro: |
Caatinga. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/113713/1/4238.pdf
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Marc: |
LEADER 02429naa a2200241 a 4500
001 2002495
005 2014-12-15
008 2014 bl uuuu u00u1 u #d
022 $a1385-1314
024 7 $a10.1007/s10705-014-9646-5$2DOI
100 1 $aAMORIM, L. B.
245 $aAssessment of nutrient returns in a tropical dry forest after clear-cut without burning.$h[electronic resource]
260 $c2014
300 $ap. 1-10
520 $aTropical dry forests (TDFs) are being deforested at unprecedented rates. The slash/burn/ agriculture/fallow-extensive livestock sequence causes significant nutrient losses and soil degradation. Our aim is to assess nutrient inputs and outputs in a TDF area under an alternative management system, for exclusive wood production. The study involved clear-cutting a preserved caatinga TDF site without burning, quantifying nutrients exported in firewood/ timber and nutrients returned to the soil from the litter layer plus the slash debris, left to decompose unburned on the soil surface. Before clear-cut, the litter layer on the forest floor contained 6.1 t ha of dry matter (DM). After clear-cut, the aboveground biomass was 61.9 t DM ha-1 (consisting of 21.5 t DM ha-1 of commercial wood and 40.4 t DM ha-1 of clear-cut debris that did not include the underlying litter layer). The litter layer was composed of fine and coarse litter, with turnovers of 0.86 and 0.31 year-1, respectively, separately measured in uncut control plots during two rainy seasons (Dec-2007/June-2008 and Dec-2008/ June-2009). In a single season, its decomposition returned to the soil 48.4, 1.16 and 12.3 kg ha-1 of N, P and K. The clear-cut debris was mainly composed of branches, 33.4 t ha-1, bromeliads, 5.63 t ha-1 and green leaves, 1.32 t ha-1. In-situ decomposition rates for branches and bromeliads were 0.24 and 1.47 year-1, respectively. After two rainy seasons the clear-cut debris released 206, 6.5 and 106 kg ha-1 of N, P and K respectively. This input plus that of the underlying litter layer exceeded exports in the commercial wood, and replenished a soil nutrient stock (0?30 cm) of approximately the same magnitude.
650 $aCaatinga
653 $aDebris decomposition
653 $aLitter decomposition
653 $aNutrient cycling
700 1 $aSALCEDO, I. H.
700 1 $aPAREYN, F. G. C.
700 1 $aALVAREZ, I. A.
773 $tNutrient Cycling in Agroecosystems$gv. 100, n. 1, sep. 2014.
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