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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
18/03/1999 |
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Data da última atualização: |
18/03/1999 |
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Autoria: |
PIVELLO, V. R.; COUTINHO, L. M. |
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Título: |
Transfer of macro-nutrientes to the atmosphere during experimental burnings in an open cerrado (Brazilian Savanna). |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Journal of Tropical Ecology, New York, v.8, p.487-497, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
This paper presents the quantities of macro-nutrients (N, P, K, Ca, Mg and S) released from ground vegetation to the atmosphere during six experimental burnings, in a Brazilian open savanas, named campo-cerrado. The values were obtained by comparing the amounts of nutrients in the fuel and in the resulting after the burn, in three different seasons. On average, 20.6 kg of N, 1.6 kg of P, 7.1 kg of K, 12.1 kg of Ca, 3.0 kg of Mg, and 3,2 kg of S ha-1 were transferred from the plant biomass to the atmosphere, representing mean percentages of 95% for N, 51% for P, 44% for K, 52% for Ca, 42% for Mg, and 59% for S. The burn season showed no significant influence on the amounts of nutrients transferred to the atmosphere. Some relationships involving the quantities of macro-nutrients released, fuel moisture, the combustion efficiency during the burns, and the initial standing biomass in the area were also tested. Comparing the averege output of macro-nutrients to the atmosphere obtained in this study with their inputs via rainfall, in the same area, it was estimated that there years would be adequate interval between prescribed burnings for this campo-cerrado, to speed up nutritien recycling without impoverishing the system. |
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Palavras-Chave: |
Ciclo de nutrientes; Cycling; Macronutriente; Sulphur. |
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Thesagro: |
Cálcio; Cerrado; Enxofre; Fósforo; Macroelemento; Magnésio; Nitrogênio; Potássio; Queimada. |
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Thesaurus Nal: |
burning; calcium; magnesium; nitrogen; phosphorus; potassium. |
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Categoria do assunto: |
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Marc: |
LEADER 02168naa a2200361 a 4500
001 1544879
005 1999-03-18
008 1992 bl --- 0-- u #d
100 1 $aPIVELLO, V. R.
245 $aTransfer of macro-nutrientes to the atmosphere during experimental burnings in an open cerrado (Brazilian Savanna).
260 $c1992
520 $aThis paper presents the quantities of macro-nutrients (N, P, K, Ca, Mg and S) released from ground vegetation to the atmosphere during six experimental burnings, in a Brazilian open savanas, named campo-cerrado. The values were obtained by comparing the amounts of nutrients in the fuel and in the resulting after the burn, in three different seasons. On average, 20.6 kg of N, 1.6 kg of P, 7.1 kg of K, 12.1 kg of Ca, 3.0 kg of Mg, and 3,2 kg of S ha-1 were transferred from the plant biomass to the atmosphere, representing mean percentages of 95% for N, 51% for P, 44% for K, 52% for Ca, 42% for Mg, and 59% for S. The burn season showed no significant influence on the amounts of nutrients transferred to the atmosphere. Some relationships involving the quantities of macro-nutrients released, fuel moisture, the combustion efficiency during the burns, and the initial standing biomass in the area were also tested. Comparing the averege output of macro-nutrients to the atmosphere obtained in this study with their inputs via rainfall, in the same area, it was estimated that there years would be adequate interval between prescribed burnings for this campo-cerrado, to speed up nutritien recycling without impoverishing the system.
650 $aburning
650 $acalcium
650 $amagnesium
650 $anitrogen
650 $aphosphorus
650 $apotassium
650 $aCálcio
650 $aCerrado
650 $aEnxofre
650 $aFósforo
650 $aMacroelemento
650 $aMagnésio
650 $aNitrogênio
650 $aPotássio
650 $aQueimada
653 $aCiclo de nutrientes
653 $aCycling
653 $aMacronutriente
653 $aSulphur
700 1 $aCOUTINHO, L. M.
773 $tJournal of Tropical Ecology, New York$gv.8, p.487-497, 1992.
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Registro original: |
Embrapa Cerrados (CPAC) |
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