RELAÇÃO ENTRE O CULTIVO DE FUMO (Nicotina tabacum L.)E A PRODUÇÃO DE SEDIMENTO NA BACIA DO ARROIO BOA VISTA, GUAMIRANGA – PR
Resumo
Em paisagens agrícolas a erosão e a redistribuição de
sedimento-nutriente é um problema a ser resolvido. Os objetivos deste
trabalho foram: 1) relacionar a dinâmica do calendário agrícola em
fumicultura e a produção de sedimento no âmbito de uma bacia rural; 2)
estimar o transporte de sedimento em canal fluvial (carga em suspensão e
fundo); 3) apresentar um estudo de caso na região Centro-Sul do Estado
do Paraná onde esta atividade econômica é importante, porém pouco
estudada. A metodologia constou de elaboração de calendário agrícola,
avaliações visuais por meio de caminhamentos sistemáticos por toda a
bacia durante os eventos chuvosos e monitoramento de vazão e produção de
sedimento. A mensuração foi conduzida entre março de 2003 a fevereiro
de 2004, neste período 46 eventos foram monitorados. Houve correlação
entre o calendário agrícola e a produção de sedimento. Conclui-se que
manejo da fumicultura potencializou sobremaneira a produção de
sedimento. A morfologia da planta e, sobretudo, o revolvimento constante
do solo por meio da formação de sulco em desnível facilita o
destacamento e o transporte de partículas. Por fim, a conexão das
propriedades através de caminhos, carreadores e estradas ampliam a
transferência de sedimento para o canal fluvial.
Palavras-chaves: Fumicultura. Erosão. Transferência de sedimento.
Relationship between tobacco plantation (Nicotina tabacum L.) and sediment production in the Boa Vista Stream, Guamiranga - PR
In agricultural landscapes the erosion and sediment-nutrient redistribution are a problem to be solved. The objectives of this work were: 1) to relate the agricultural calendar dynamics on the tobacco plantation, as well as to asses its relationship with the sediment yield on agricultural watershed; 2) to evaluate the fluvial sediment transport (suspension and bedload); 3) to display a study case in the Center-South of the Parana State region; where this economic activity is important, however, it has fewer study. The methodology consisted of agricultural calendar establishments, visual appraisal with systematic fieldwork throughout the watershed during the rainy events and discharge and sediment yield measurement. The measurement was carried out between March 2003 and February 2004, in this period 46 events had been monitored. There were correlation between the agricultural calendar and the sediment production. It was verified that the tobacco tillage enhanced the soil erosion. The plant morphology and, in particular, the constant topsoil ploughing, also with furrow formation facilitates both; detachment and particle transport. Finally, the farmland connection through, pathways, corridor and roads extend the sediment transfer into fluvial canal.
Key words: Nicotina tabacum. Erosion. Sediment transfer.
Palavras-chaves: Fumicultura. Erosão. Transferência de sedimento.
Relationship between tobacco plantation (Nicotina tabacum L.) and sediment production in the Boa Vista Stream, Guamiranga - PR
In agricultural landscapes the erosion and sediment-nutrient redistribution are a problem to be solved. The objectives of this work were: 1) to relate the agricultural calendar dynamics on the tobacco plantation, as well as to asses its relationship with the sediment yield on agricultural watershed; 2) to evaluate the fluvial sediment transport (suspension and bedload); 3) to display a study case in the Center-South of the Parana State region; where this economic activity is important, however, it has fewer study. The methodology consisted of agricultural calendar establishments, visual appraisal with systematic fieldwork throughout the watershed during the rainy events and discharge and sediment yield measurement. The measurement was carried out between March 2003 and February 2004, in this period 46 events had been monitored. There were correlation between the agricultural calendar and the sediment production. It was verified that the tobacco tillage enhanced the soil erosion. The plant morphology and, in particular, the constant topsoil ploughing, also with furrow formation facilitates both; detachment and particle transport. Finally, the farmland connection through, pathways, corridor and roads extend the sediment transfer into fluvial canal.
Key words: Nicotina tabacum. Erosion. Sediment transfer.
Texto completo:
PDF
Geografia, Rio Claro, SP, Brasil - pISSN 0100-7912 - eISSN 1983-8700 está licenciada sob Licença Creative Commons > > > > >
