Name: KERWIN ARAUJO COSTA
Publication date: 20/08/2021
Advisor:
Name |
Role |
|---|---|
| FÁBIO RIBEIRO PIRES | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ADRIANO ALVES FERNANDES | Co advisor * |
| FÁBIO RIBEIRO PIRES | Advisor * |
Summary: Clay exploration has been fundamental for the country´s economic development,
however, this activity is directly related to soil damage, due to the removal of its surface
layers. The aim of this study was to evaluate the use of different techniques of
revegetation and soil preparation, combined with ways of introducing native species
from coastal plateaus of the Atlantic Forest in the recovery of two sites degraded by
clay exploration. The experimental areas were composed of a slope and a pit bottom
of a deposit, in which the experimental design used was in randomized blocks in a 3x3
factorial scheme with 3 replications. For the slope, the compounds were composed by
a combination of revegetation techniques (biomanta, hydroseeding and jute bag) and
forms of introduction of native vegetation (Only native species, native species
introduced simultaneously to the mix of herbaceous seeds and native species
introduced six months ago after the mix) and for the bottom of the pit were composed
by the combination of soil preparations (scarification, scarification + harrowing and
subsoiling + harrowing) and forms of introduction of native vegetation, as occurred on
the slope. For the two experiments, soil density, total porosity, macroporosity and
microporosity, soil resistance to penetration, aggregate stability, permeability and soil
fertility were determined. Both on the slope and at the bottom of the pit, the treatments
promoted increases in the physical and chemical attributes of the soil, although many
of them did not differ from the evaluation carried out before the implementation of the
experiment. There was a remarkable improvement in the total porosity of the soil and
distribution of macro and micropores, close to the ideal condition. The lower values of
penetration resistance and the increase in the values of chemical attributes for the 0-5
cm layer allowed the development of introduced plant species for revegetation of the
clay deposit, even with edaphic limitations observed at 24 months.
