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68. | | ISHIDA, F. Y.; CARVALHO, C. J. R. de; DIAS FILHO, M. B. Crescimento e regulação osmótica em duas especies de Brachiaria (B. brizantha e B. humidicola), submetidas a dois ciclos de secamento. In: CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL, 6., 1997, Belém, PA. Resumos. Belém, PA: SBFV, 1997. p. 313. Biblioteca(s): Embrapa Amazônia Oriental. |
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74. | | SERRÃO, B. de O.; CARVALHO, C. J. R. de; DUTRA, F. C. Mecanismos ligados a ciclagem de nitrogênio e fósforo em área de pastagem abandonada na Amazônia Oriental: resultados de um experimento de fertilização. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA UFRA, 4.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 10., 2007, Belém, PA. Anais... Belém, PA: UFRA: Embrapa Amazônia Oriental, 2007. 1 CD-ROM. Biblioteca(s): Embrapa Amazônia Oriental. |
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78. | | SILVA, P. R. dos S.; CARVALHO, C. J. R. de; AZEVEDO, R. de; ROUSSEAU, G. X. Ocorrência de formigas em diferentes sistemas de uso do solo, na Região Bragantina do Estado do Pará. In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 22., 2008, Uberlândia. Ciência, tecnologia e inovação: resumos. Viçosa: UFV, 2008. Resumo 1487-1. Biblioteca(s): Embrapa Amazônia Oriental. |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
25/06/2013 |
Data da última atualização: |
07/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
MARKEWITZ, D.; FIGUEIREDO, R. de O.; CARVALHO, C. J. R. de; DAVIDSON, E. A. |
Afiliação: |
DANIEL MARKEWITZ, Warnell School of Forestry and Natural Resources, The University of Georgia; RICARDO DE OLIVEIRA FIGUEIREDO, CNPMA; CLAUDIO JOSE REIS DE CARVALHO, CPATU; ERIC A. DAVIDSON, The Woods Hole Research Center. |
Título: |
Soil and tree response to P fertilization in a secondary tropical forest supported by an Oxisol. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Biology and Fertility of Soils, v. 48, n. 6, p. 665-678, Aug. 2012. |
DOI: |
10.1007/s00374-011-0659-9 |
Idioma: |
Inglês |
Conteúdo: |
Abstract Mature tropical forests are considered to be P limited and to cycle P efficiently. Whether P limitations are significant in younger secondary tropical forests, how- ever, remains largely unexplored. This study evaluated P limitation by observing the P fertilizer response of a natu- rally regenerated 24-year-old forest and its soil. In February 1999, six 20×20-m plots were established in secondary forest in the Brazilian Amazon. After 1 year of pre- treatment tree measurements, 50 kg Pha-1 was applied in January 2000 and again in January 2001. Soil sorption of P was relatively low (~100 micrograms g-1) in the surface 0?20 cm while sorption increased to ~180 micrograms g-1 at 20?50 cm and approached ~500 micrograms g-1 for the 50- to 200-cm layers. Soil P in 0?10 cm, measured as sequentially extractable fractions (resin, HCO3-Pi, NaOH-Pi, NaOH-Po, and 1 M HCl), in- creased shortly after fertilization and could account for nearly all the 50 kg Pha-1 added at each date. During the following 6 years, soil P in fertilized plots declined in all pools other than resin P, and by June 2006, concentrations returned to pre-fertilization levels. Despite the increase in extractable P with fertilization, increased tree growth was not detected from stand age 25 to 31 years. It appears that during secondary forest succession at this site, the forest P cycle was conservative so as to maintain available P at a sufficient concentration to meet forest P demands. |
Palavras-Chave: |
Fracionamento de fósforo; Limitação de fósforo; Sorção de fósforo. |
Thesagro: |
Fertilidade do solo; Floresta secundária; Floresta tropical; Fósforo. |
Thesaurus NAL: |
Amazonia; phosphorus fertilizers; rain forests; secondary forests; soil fertility. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02448naa a2200313 a 4500 001 1960562 005 2022-11-07 008 2012 bl uuuu u00u1 u #d 024 7 $a10.1007/s00374-011-0659-9$2DOI 100 1 $aMARKEWITZ, D. 245 $aSoil and tree response to P fertilization in a secondary tropical forest supported by an Oxisol.$h[electronic resource] 260 $c2012 520 $aAbstract Mature tropical forests are considered to be P limited and to cycle P efficiently. Whether P limitations are significant in younger secondary tropical forests, how- ever, remains largely unexplored. This study evaluated P limitation by observing the P fertilizer response of a natu- rally regenerated 24-year-old forest and its soil. In February 1999, six 20×20-m plots were established in secondary forest in the Brazilian Amazon. After 1 year of pre- treatment tree measurements, 50 kg Pha-1 was applied in January 2000 and again in January 2001. Soil sorption of P was relatively low (~100 micrograms g-1) in the surface 0?20 cm while sorption increased to ~180 micrograms g-1 at 20?50 cm and approached ~500 micrograms g-1 for the 50- to 200-cm layers. Soil P in 0?10 cm, measured as sequentially extractable fractions (resin, HCO3-Pi, NaOH-Pi, NaOH-Po, and 1 M HCl), in- creased shortly after fertilization and could account for nearly all the 50 kg Pha-1 added at each date. During the following 6 years, soil P in fertilized plots declined in all pools other than resin P, and by June 2006, concentrations returned to pre-fertilization levels. Despite the increase in extractable P with fertilization, increased tree growth was not detected from stand age 25 to 31 years. It appears that during secondary forest succession at this site, the forest P cycle was conservative so as to maintain available P at a sufficient concentration to meet forest P demands. 650 $aAmazonia 650 $aphosphorus fertilizers 650 $arain forests 650 $asecondary forests 650 $asoil fertility 650 $aFertilidade do solo 650 $aFloresta secundária 650 $aFloresta tropical 650 $aFósforo 653 $aFracionamento de fósforo 653 $aLimitação de fósforo 653 $aSorção de fósforo 700 1 $aFIGUEIREDO, R. de O. 700 1 $aCARVALHO, C. J. R. de 700 1 $aDAVIDSON, E. A. 773 $tBiology and Fertility of Soils$gv. 48, n. 6, p. 665-678, Aug. 2012.
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