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| Registros recuperados : 205 | |
| 11. |  | AMORIM, L. L.; THOMAZINI, M. J. Efeito de extratos de plantas da Amazônia brasileira, com potencial inseticida, sobre insetos benéficos. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA PIBIC/CNPq/UFAC, 13., 2004, Rio Branco, AC. Anais... Rio Branco, AC: Ufac, 2004. 1 p. 1 CD-ROM.| Biblioteca(s): Embrapa Acre. |
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| 12. | | AMORIM, L. L.; THOMAZINI, M. J. Efeito de extratos de plantas da Amazônia brasileira, com potencial inseticida, sobre insetos benéficos. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA PIBIC/CNPq//UFAC, 14.; MOSTRA DE PESQUISA E PÓS-GRADUAÇÃO, 4., 2005, Rio Branco, AC. Anais... Rio Branco, AC: Ufac, 2005. 2 p> 1 CD-ROM.| Biblioteca(s): Embrapa Acre. |
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| 15. | | AMORIM, L. T.; DUQUE, F. F. Influência do periodo de incorporação de diferentes materiais organicos na fixação biologica de nitrogênio em feijão. In: , eds. In: SEMINARIO BIENAL DE PESQUISA DA UFRRJ, 4, MOSTRA COMUNITARIA DE PESQUISA, ENSINO E PRODUCAO, 1, Rio de Janeiro, 1988. Resumos... Rio de Janeiro, UFRRJ, Departamento de Pesquisa e Pos-Graduacao. p.127.. , 1988.| Biblioteca(s): Embrapa Agrobiologia. |
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| 20. | | AMORIM, L. O. do; CURADO, F. F.; BARTH, V. J. Identificação de variedades crioulas em bancos de sementes familiares no Alto Sertão Sergipano, Brasil. Identification of criollo varieties in banks of family seeds in Alto Sertão Sergipano, Brazil. Cadernos de Agroecologia, v. 13, n. 1, 2018. ANAIS CONGRESSO LATINO-AMERICANO DE AGROECOLOGIA, 6.; CONGRESSO BRASILEIRO DE AGROECOLOGIA, 10.; SEMINÁRIO DE AGROECOLOGIA DO DISTRITO FEDERAL E ENTORNO, 5., 2017, Brasília, DF. Agroecologia na transformação dos sistemas agroalimentares...| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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Registro Completo
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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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