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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
09/07/2012 |
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Data da última atualização: |
09/07/2012 |
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Autoria: |
FAGOTTI, D. S. L.; MIYAUCHI, M. Y. H.; OLIVEIRA, A. G.; SANTINONI, I. A.; EBERHARDT, D. N.; NIMTZ, A.; RIBEIRO, R. A.; PAULA, A. M.; QUEIROZ, C. A. S.; ANDRADE, G.; ZANGARO, W.; NOGUEIRA, M. A. |
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Afiliação: |
D. S. L. FAGOTTI, UEL; M. Y. H. MIYAUCHI, ESALQ - USP; A. G. OLIVEIRA, UEL; I. A. SANTINONI, UEL; D. N. EBERHARDT, ESALQ - USP; A. NIMTZ, UEL; R. A. RIBEIRO, UEL; A. M. PAULA, ESALQ - USP; C. A. S. QUEIROZ, UEL; G. ANDRADE, UEL; W. ZANGARO, UEL; MARCO ANTONIO NOGUEIRA, UEL. |
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Título: |
Gradients in N-cycling attributes along forestry and agricultural land-use systems are indicative of soil capacity for N supply. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Soil Use and Management, Oxford, p. 1-7, 2012. |
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Páginas: |
7 p. |
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DOI: |
10.1111/j.1475-2743.2012.00418.x |
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Idioma: |
Inglês |
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Conteúdo: |
Indicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to
4 g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH4 +-N ⁄ kg per h), glutaminase (ca. 200?800 mg NH4 +-N ⁄ kg per h) and urease (ca. 80?200 mg NH4 +-N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils, indicating greater capacity for N mineralization. The NAT and AGR soils showed the highest and the lowest ammonification rate, respectively (ca. 1 and 0.4 mg NH4 +-N ⁄ kg per day), but the inverse for nitrification rate (ca. 12 and 26%), indicating a low capacity for N supply, in addition to higher risks of N losses in the AGR soil. A multivariate analysis indicated more similarity between NAT and A. angustifolia-reforested sites, whilst the AGR soil was different and associated with a higher nitrification rate. In general, reforestation with the native species A. angustifolia had less impact than reforestation with the exogenous species P. taeda, considering the soil capacity for N supply. However, AGR use caused more changes, generally decrease in indicators of N-cycling, showing a negative soil management effect on the sustainability of this agroecosystem. MenosIndicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to
4 g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH4 +-N ⁄ kg per h), glutaminase (ca. 200?800 mg NH4 +-N ⁄ kg per h) and urease (ca. 80?200 mg NH4 +-N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils, indicating greater capacity for N mineralization. The NAT and AGR soils showed the highest and the lowest ammonification rate, respectively (ca. 1 and 0.4 mg NH4 +-N ⁄ kg per day), but the inverse for nitrification rate (ca. 12 and 26%), indicating a low capacity for N supply, in addition to higher risks of N losses in the AGR soil. A multivariate analysis indicated more similarity between NAT and A. angustifolia-reforested sites, whilst the AGR soil was different and associated with a higher nitrification rate. In general, reforestation with the native species A. angustifolia had less impact than reforestation with the exogenous species P. taeda, considering the soil capacity for N supply. However, AGR use caused more changes, generally decrease... Mostrar Tudo |
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Thesagro: |
Amonificação; Araucária Angustifólia; Solo. |
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Thesaurus Nal: |
ammonification; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02577naa a2200337 a 4500
001 1927900
005 2012-07-09
008 2012 bl --- 0-- u #d
024 7 $a10.1111/j.1475-2743.2012.00418.x$2DOI
100 1 $aFAGOTTI, D. S. L.
245 $aGradients in N-cycling attributes along forestry and agricultural land-use systems are indicative of soil capacity for N supply.
260 $c2012
300 $a7 p.
520 $aIndicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to 4 g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH4 +-N ⁄ kg per h), glutaminase (ca. 200?800 mg NH4 +-N ⁄ kg per h) and urease (ca. 80?200 mg NH4 +-N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils, indicating greater capacity for N mineralization. The NAT and AGR soils showed the highest and the lowest ammonification rate, respectively (ca. 1 and 0.4 mg NH4 +-N ⁄ kg per day), but the inverse for nitrification rate (ca. 12 and 26%), indicating a low capacity for N supply, in addition to higher risks of N losses in the AGR soil. A multivariate analysis indicated more similarity between NAT and A. angustifolia-reforested sites, whilst the AGR soil was different and associated with a higher nitrification rate. In general, reforestation with the native species A. angustifolia had less impact than reforestation with the exogenous species P. taeda, considering the soil capacity for N supply. However, AGR use caused more changes, generally decrease in indicators of N-cycling, showing a negative soil management effect on the sustainability of this agroecosystem.
650 $aammonification
650 $asoil
650 $aAmonificação
650 $aAraucária Angustifólia
650 $aSolo
700 1 $aMIYAUCHI, M. Y. H.
700 1 $aOLIVEIRA, A. G.
700 1 $aSANTINONI, I. A.
700 1 $aEBERHARDT, D. N.
700 1 $aNIMTZ, A.
700 1 $aRIBEIRO, R. A.
700 1 $aPAULA, A. M.
700 1 $aQUEIROZ, C. A. S.
700 1 $aANDRADE, G.
700 1 $aZANGARO, W.
700 1 $aNOGUEIRA, M. A.
773 $tSoil Use and Management, Oxford, p. 1-7, 2012.
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Embrapa Soja (CNPSO) |
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