Extração de fosfato e utilização da técnica de rochagem como alternativa para os pequenos e médios agricultores
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Date
2020-04-29
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Universidade Católica do Salvador
Abstract
Brazil is considered the breadbasket of the world, since a large piece of its Gross
Domestic Product (GDP) comes from agriculture. However, the country is going
through a delicate situation, since that in order to continue and increase production
without the need to expand the area, it needs agrominerals to fertilize the soil
whenever it is old and leached. Currently, most of the agrominerals used are
imported and very expensive, what makes it hard for small and medium farmers to
acquire them. Besides, the conventional fertilizers are very soluble and not adapted
to tropical regions, and for that reason are washed away, leading to supply reduction
for later crops and eutrophication of rivers and lakes. That can directly impact human
supply, as in phosphate for instance, which whether it is in large quantity in the
sources, it causes the development of algae that produce toxins, leading to a
reduction in the amount of oxygen dissolved in the water, harming the fish and
consequently all the local aquatic ecosystem. Thus, looking for solutions to help
small farmers cause less harm to the environment, reduce the country dependence
on imported fertilizers and help the mining companies discard the waste ecologically,
a technique called “rockiness”, “rock powder” or “remineralizer”, has been
disseminated. This technique consists on fertilizing the soil by using specific grinded
rocks, which are considered intelligent fertilizers, as they gradually releases minerals
to plants but do not harm the soil by avoiding excesses, contributing to an agricultural
sustainable practice and facilitating its use for those who cannot afford the
conventional fertilizers. It is important to mention that the use of remineralizers does
not intend to replace the conventional fertilizers but to increase the range of
possibilities for soil fertilization what consequently makes the man keep working in
the agriculture as well as a healthier food production. Since fertility is expected to be
acquired without the addition of chemical processes in the beneficiation. It will occur
only by the use of grinded rocks, which remain in the soil for a longer period.
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Keywords
Fertilizantes convencionais, Remineralizadores, Impactos ambientais, Conventional fertilizers, Remineralizers, Environmental impacts, Production