Gestão do solo na Quinta da Senhora de Mércules : estudo de caso.
Type
article
Identifier
BATISTA, M.S. ; MONTEIRO, M.C.H. ; ALMEIDA, J.P.F. (2012) - Gestão do solo na Quinta da Senhora de Mércules : estudo de caso. Agroforum : Revista da Escola Superior Agrária de Castelo Branco. ISSN 0872-2617. Ano 19:28, p. 6-15.
0872-2617
Title
Gestão do solo na Quinta da Senhora de Mércules : estudo de caso.
Subject
Agricultura
Avaliação de terras
Fósforo
Matéria orgânica
Qualidade do solo
Agriculture
Organic matter
Phosphorus
Soil evaluation
Soil quality
Avaliação de terras
Fósforo
Matéria orgânica
Qualidade do solo
Agriculture
Organic matter
Phosphorus
Soil evaluation
Soil quality
Date
2018-02-17T16:36:08Z
2018-02-17T16:36:08Z
2012
2018-02-17T16:36:08Z
2012
Description
O solo é um recurso natural não renovável à escala de tempo humana. O uso agrícola do solo deve ter por base o conhecimento da sua constituição a nível do perfil, da localização topográfica e das propriedades físico-químicas de forma a compatibilizar a produção agro-pecuária com a sustentabilidade do recurso solo e do ambiente envolvente. No presente trabalho foi efectuada a caracterização do uso agro-pecuário das parcelas da quinta da Senhora de Mércules, a evolução da fertilidade do solo ao longo do tempo e, com base nessa informação elaborou-se uma proposta de aptidão potencial para uso agro-pecuário dessas parcelas. Os solos classificam-se como Fluvissolos, Regossolos e Cambissolos. São predominantemente ácidos a pouco ácidos, com níveis elevados de fósforo e potássio. Os teores em matéria orgânica (MO) são muito variáveis. Nas parcelas com maior intensidade de pastoreio e de uso agrícola registam-se os valores mais elevados de MO e de nutrientes no solo, o que constitui uma fonte de poluição difusa. Pontualmente, observam-se valores de Zn, Ni e Cr, acima do limite estabelecido no DL 118/2006 de 1 de Junho, o que será, em princípio, devido às características do material originário. Relativamente à aptidão produtiva potencial, dividiu-se a área em duas classes, uma de Mobilização Mínima e outra de Zonas Sensíveis, por limitação ao pastoreio, excesso de alguns metais pesados e zona de baixa com risco de degradação química e poluição difusa para águas subterrâneas e superficiais. Aconselha-se a monitorização da qualidade do solo nas parcelas da classe Zonas Sensíveis.
Abstract Soil is a non-renewable natural resource considering the human time scale. Thus, the agricultural use of soil should be managed taking into account its profile development, and also topographic and physical-chemical properties. This will allow harmonizing the agricultural and livestock production to the sustainability of soil resources and the surrounding environment. The present study was undertaken to characterize the agricultural systems in use in “Quinta da Senhora de Mércules”, to characterize and evaluate the evolution of soil fertility over time and based on information collected it was elaborated a proposal of soil use management. Soils are classified as Fluvisols, Regosols and Cambisols, they are predominantly acid or with low-acidity, with high levels of phosphorus and potassium. The amounts of organic matter (OM) are highly variable. In the areas with greater grazing or agricultural intensity it was observed the highest values of soil organic matter and nutrients. These areas are non point source pollution. In some points of the area values of Zn, Ni and Cr, are above the limit set out in the National Law - DL/118/2006 of June 1. This is probably due to the characteristics of the soil parent material. The productive area was proposed to be divided into two classes, one of “minimum mobilization” and another class of “sensitive areas”. This last class has limitations for grazing, or excessive heavy metals levels or risk of chemical degradation and pollution of groundwater or surface water. It is advisable to monitorize soil quality namely in the “sensitive area”.
info:eu-repo/semantics/publishedVersion
Abstract Soil is a non-renewable natural resource considering the human time scale. Thus, the agricultural use of soil should be managed taking into account its profile development, and also topographic and physical-chemical properties. This will allow harmonizing the agricultural and livestock production to the sustainability of soil resources and the surrounding environment. The present study was undertaken to characterize the agricultural systems in use in “Quinta da Senhora de Mércules”, to characterize and evaluate the evolution of soil fertility over time and based on information collected it was elaborated a proposal of soil use management. Soils are classified as Fluvisols, Regosols and Cambisols, they are predominantly acid or with low-acidity, with high levels of phosphorus and potassium. The amounts of organic matter (OM) are highly variable. In the areas with greater grazing or agricultural intensity it was observed the highest values of soil organic matter and nutrients. These areas are non point source pollution. In some points of the area values of Zn, Ni and Cr, are above the limit set out in the National Law - DL/118/2006 of June 1. This is probably due to the characteristics of the soil parent material. The productive area was proposed to be divided into two classes, one of “minimum mobilization” and another class of “sensitive areas”. This last class has limitations for grazing, or excessive heavy metals levels or risk of chemical degradation and pollution of groundwater or surface water. It is advisable to monitorize soil quality namely in the “sensitive area”.
info:eu-repo/semantics/publishedVersion
Access restrictions
openAccess
http://creativecommons.org/licenses/by/4.0/
http://creativecommons.org/licenses/by/4.0/
Language
por
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