|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Pantanal. |
|
Data corrente: |
27/06/1995 |
|
Data da última atualização: |
05/07/1996 |
|
Autoria: |
JORDAN, C.; CASKEY, W.; ESCALANTE, G.; HERRERA, R.; MONTAGNINI, F.; TODD, R.; UHL, C. |
|
Título: |
Nitrogen dynamics during conversion of primary Amazonian rain forest to slash and burn agriculture. |
|
Ano de publicação: |
1983 |
|
Fonte/Imprenta: |
Oikos, v.40, n.1, p.131-139, 1983. |
|
Idioma: |
Inglês
Português |
|
Conteúdo: |
The standing stocksand fluxes of nitrogen were measured for four years in an experimental slah and burn agricultural site and control forest in the Amazon Basin of Venezuela. During the study, there was a decrease of about 15% in nitrogen in the system as a whole due to leaching, harvesting, and dednitrification. However, nitrogen levels in the soil did not change, due to replenishment by nitrogen entering the soil from decomposing slash. Since nitrogen levels in the soil remained high, scarcity of nitrogen is probably not responsible for the observed decline in crop yields, and lack of nitrogen is not expected to affect succession in the abandoned agricultural plot. |
|
Palavras-Chave: |
Amazon Basin of Venezuela; Burn agriculture; Dinamica; Nitrogen synamics; Queima; Rain forest. |
|
Thesagro: |
Agricultura; Agronomia; Fertilidade do Solo; Floresta Tropical; Matéria Orgânica; Nitrogênio; Rotação de Cultura. |
|
Thesaurus Nal: |
Amazonia. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01628naa a2200361 a 4500
001 1789300
005 1996-07-05
008 1983 bl --- 0-- u #d
100 1 $aJORDAN, C.
245 $aNitrogen dynamics during conversion of primary Amazonian rain forest to slash and burn agriculture.
260 $c1983
520 $aThe standing stocksand fluxes of nitrogen were measured for four years in an experimental slah and burn agricultural site and control forest in the Amazon Basin of Venezuela. During the study, there was a decrease of about 15% in nitrogen in the system as a whole due to leaching, harvesting, and dednitrification. However, nitrogen levels in the soil did not change, due to replenishment by nitrogen entering the soil from decomposing slash. Since nitrogen levels in the soil remained high, scarcity of nitrogen is probably not responsible for the observed decline in crop yields, and lack of nitrogen is not expected to affect succession in the abandoned agricultural plot.
650 $aAmazonia
650 $aAgricultura
650 $aAgronomia
650 $aFertilidade do Solo
650 $aFloresta Tropical
650 $aMatéria Orgânica
650 $aNitrogênio
650 $aRotação de Cultura
653 $aAmazon Basin of Venezuela
653 $aBurn agriculture
653 $aDinamica
653 $aNitrogen synamics
653 $aQueima
653 $aRain forest
700 1 $aCASKEY, W.
700 1 $aESCALANTE, G.
700 1 $aHERRERA, R.
700 1 $aMONTAGNINI, F.
700 1 $aTODD, R.
700 1 $aUHL, C.
773 $tOikos$gv.40, n.1, p.131-139, 1983.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
