Título: | A STUDY OF THE DISTRIBUITION OF 2,4-D HERBICIDE IN AGRICULTURAL SOILS OF THE REGION OF SÃO PEDRO DA SERRA -RJ, AND ITS ENVIRONMENTAL SIGNIFICANCE | |||||||
Autor: |
JOEDY PATRICIA CRUZ QUEIROZ |
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Colaborador(es): |
OLAVO BARBOSA FILHO - Orientador RAUL ALMEIDA NUNES - Coorientador |
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Catalogação: | 12/JUN/2008 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=11759&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=11759&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.11759 | |||||||
Resumo: | ||||||||
The São Pedro da Serra Region has two types of tillage for
the sowing soil, the shifting cultivation is based on the
soil area rotation and the traditional utilize
high amount of agro-toxics products. The aim of this work
is to study the 2,4 D herbicide fixation and mobilization
from the soil characteristics and the tillage.
The cultivated areas were divided depending of the sow time
as: system 1 (shifting cultivation 4-7 years), system 2
(shifting cultivation 10-12 years), system 3 (traditional
sow), system 4 (forest area). Three different depths were
selected (0-10 cm, 10-20 cm, 25-40 cm). The four different
systems were compared using the mineralogical
characterization, the soil micro morphology, the physic and
chemic fractionation for the organic material and the
herbicide quantification by the HPLC technique. The semi
quantitative results using the HPLC verify the 2,4-
D herbicide contains for all the studied systems. The 2,4-D
concentration have correlation with the amount of clay of
the soil, and have correlation negative with
the amount of Al3+ and H+. The relation depends on the
herbicide and soil chemical characteristics. The study
found that the shifting cultivation had the best
2,4-D elimination, The shifting cultivation soil management
permit the better soil regeneration of the chemical and
physical properties and the agro-toxic use
reduction and the hydro source contamination.
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