Pecuária bovina e condicionantes socioambientais na bacia hidrográfica do Rio vermelho - GO
Nenhuma Miniatura disponível
Data
2017-12-15
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
This thesis identified and analyzed the factors that determine the decision-
making process of beef producers in relation to their investments in
technology and the environmental consequences of these decisions, focusing
on the Vermelho River basin as the geographical unit of analysis. The study
analyzed the productive and economic viability of four models of beef
production based on grazing systems, considering distinct levels of
technology. This study defined three analytical dimensions: the socio-
economic profile of the producer, the configuration of the production system,
and management practices. The research used a stratified sampling design,
with 60 randomly-selected cattle ranching establishments distributed in the
strata according to their relief and the variability of their soils. The responses
to the standard questionnaire provided primarily qualitative data, with the
variables being measured on an ordinal or nominal scale. Multiple
correspondence and cluster analyses were used to identify, respectively, the
components that contributed most to the variance observed in the analyses,
and the groups of variables and sampling units which best represented the
indices of technology and pasture degradation, with a beta regression being
applied to determine a mathematical function that could be applied to infer
the classification of other sampling units in the study basin. The technological
and pasture degradation indices did not present any spatial autocorrelation,
based on Moran’s global or local indices. Nonparametric statistics (Fisher’s
exact test, Spearman and Kendall) were used to verify the significance of the
associations among the variables tested during the study. Principal results:
the system with the lowest input of supplements was the most profitable; no
significant relationship was found between the technological index and any of
the variables: education, farm credit, cattle density, pasture degradation
index, or the interaction of this index with the size of the property. Significant
associations were identified between the technological index and the income,
relief, and size of the property. The positive association between income and
technology indicates that more technological systems are more profitable. The
inverse relationship between relief and technology reflects the fact that the
more technological systems tend to be installed on flatter or gently sloping
terrain. The direct association between the size of the property and the use of
technology reflects the importance of obtaining economies of scale to
guarantee the profitability of the investment. The lack of any systematic
relationship between the technological index and cattle density, as confirmed
by the cluster analysis, indicates that high densities (above 2 animals per
hectare) may be found in low technology systems, which impacts productivity
and profitability, as well as long-term environmental sustainability.
Descrição
Citação
OLIVEIRA, Elis Regina de. Pecuária bovina e condicionantes socioambientais na bacia hidrográfica do Rio vermelho - GO. 2017. 196 f. Tese (Doutorado em Ciências Ambientais) - Universidade Federal de Goiás, Goiânia, 2017.