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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
21/12/1995 |
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Data da última atualização: |
21/12/1995 |
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Autoria: |
CARLYLE, J. C.; LOWTHER, J. R.; SMETHURST, P. J.; NAMBIAR, E. K. S. |
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Afiliação: |
CSIRO. |
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Título: |
Influence of chemical properties on nitrogen mineralization and nitrification in podzolized sands. Implications for forest management. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Australian Journal of Soil Research, v.28, p.981-1000, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
The relationship between selected chemical properties and nitrogen mineralization and nitrification was examined in soils collected from 39 sites of varying history. All sites were on podzolized sands; such soils represent more than 95% of the P. radiata growing area in south-east of South Australia/western Victoria. Given their uniformity in texture and similarity in pedogenesis, the organic matter concentrations of the sampled soils were highly variable (loss-on-ignition 0.8-10.2%). Total nitrogen was highly correlated with loss-on-ignition (r2 = 0.95, P menor igual 0.001). Nitrogen mineralization was correlated neither with total nitrogen nor loss-on-ignitition (i.e. P maior igual 0.05), but was correlated with organic phosphorus (r2 = 0.70, P menor igual0.001), suggesting a maior effect of phosphorus on nitrogen mineralization in these soils. On the basis of nitrate production during a 56-day aerobic incubation of disturbed soil, 18 soils were classed as strongly nitrifying (having a high potential to nitrify) and 18 as weakly nitrifying (having a low potential to nitrify). This separation reflected differences in other soils properties, with discriminant analysis giving a 91.7% correct classification into the two groups using only pH and Bray (II) extractable phosphorus for discrimination. Strongly and weakly nitrifying groups could also be discriminated on the basis of their value/chroma rating (after ignition), with a 94.4% probability of correct classification. Within each classification, nitrogen... MenosThe relationship between selected chemical properties and nitrogen mineralization and nitrification was examined in soils collected from 39 sites of varying history. All sites were on podzolized sands; such soils represent more than 95% of the P. radiata growing area in south-east of South Australia/western Victoria. Given their uniformity in texture and similarity in pedogenesis, the organic matter concentrations of the sampled soils were highly variable (loss-on-ignition 0.8-10.2%). Total nitrogen was highly correlated with loss-on-ignition (r2 = 0.95, P menor igual 0.001). Nitrogen mineralization was correlated neither with total nitrogen nor loss-on-ignitition (i.e. P maior igual 0.05), but was correlated with organic phosphorus (r2 = 0.70, P menor igual0.001), suggesting a maior effect of phosphorus on nitrogen mineralization in these soils. On the basis of nitrate production during a 56-day aerobic incubation of disturbed soil, 18 soils were classed as strongly nitrifying (having a high potential to nitrify) and 18 as weakly nitrifying (having a low potential to nitrify). This separation reflected differences in other soils properties, with discriminant analysis giving a 91.7% correct classification into the two groups using only pH and Bray (II) extractable phosphorus for discrimination. Strongly and weakly nitrifying groups could also be discriminated on the basis of their value/chroma rating (after ignition), with a 94.4% probability of correct classification. Withi... Mostrar Tudo |
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Palavras-Chave: |
Areias podzolicas; Forest; Podzolized sands. |
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Thesagro: |
Floresta; Mineralização; Nitrificação; Nitrogênio. |
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Thesaurus Nal: |
mineralization; nitrification; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02342naa a2200277 a 4500
001 1075497
005 1995-12-21
008 1990 bl --- 0-- u #d
100 1 $aCARLYLE, J. C.
245 $aInfluence of chemical properties on nitrogen mineralization and nitrification in podzolized sands. Implications for forest management.
260 $c1990
520 $aThe relationship between selected chemical properties and nitrogen mineralization and nitrification was examined in soils collected from 39 sites of varying history. All sites were on podzolized sands; such soils represent more than 95% of the P. radiata growing area in south-east of South Australia/western Victoria. Given their uniformity in texture and similarity in pedogenesis, the organic matter concentrations of the sampled soils were highly variable (loss-on-ignition 0.8-10.2%). Total nitrogen was highly correlated with loss-on-ignition (r2 = 0.95, P menor igual 0.001). Nitrogen mineralization was correlated neither with total nitrogen nor loss-on-ignitition (i.e. P maior igual 0.05), but was correlated with organic phosphorus (r2 = 0.70, P menor igual0.001), suggesting a maior effect of phosphorus on nitrogen mineralization in these soils. On the basis of nitrate production during a 56-day aerobic incubation of disturbed soil, 18 soils were classed as strongly nitrifying (having a high potential to nitrify) and 18 as weakly nitrifying (having a low potential to nitrify). This separation reflected differences in other soils properties, with discriminant analysis giving a 91.7% correct classification into the two groups using only pH and Bray (II) extractable phosphorus for discrimination. Strongly and weakly nitrifying groups could also be discriminated on the basis of their value/chroma rating (after ignition), with a 94.4% probability of correct classification. Within each classification, nitrogen...
650 $amineralization
650 $anitrification
650 $anitrogen
650 $aFloresta
650 $aMineralização
650 $aNitrificação
650 $aNitrogênio
653 $aAreias podzolicas
653 $aForest
653 $aPodzolized sands
700 1 $aLOWTHER, J. R.
700 1 $aSMETHURST, P. J.
700 1 $aNAMBIAR, E. K. S.
773 $tAustralian Journal of Soil Research$gv.28, p.981-1000, 1990.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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