Name: ANA PAULA BRAIDO PINHEIRO
Publication date: 31/07/2019
Advisor:
Name |
Role |
|---|---|
| FÁBIO RIBEIRO PIRES | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ADRIANO ALVES FERNANDES | Co advisor * |
| EDILSON ROMAIS SCHMILDT | Co advisor * |
| FÁBIO RIBEIRO PIRES | Advisor * |
Summary: The forest remnants of the Atlantic Forest are well below the original vegetation, and
with this increase the occurrence of areas degraded by anthropic activities resulting
from economic growth causing removal of the fertile soil layer and exposure of horizons
of low fertility. These areas, for the most part, are compacted because they are in the
subsurface horizons and with deficits in the nutrient content, making the development
of the species impossible. Therefore, in order to be successful in projects for the
recovery of degraded areas, quality seedlings are necessary, to use techniques that
allow the development of the species in these areas, to know the species that adapt to
a particular type of degradation and its nutritional requirements. Aiming at the recovery
and management of degraded areas four experiments were developed. In the first
experiment the objective was to produce quality seedlings of Canavalia rosea with low
cost using different substrates and fertilizers. The levels of fertilization with simple
superphosphate, simple superphosphate + micronutrients, NPK 04-14-08 and NPK 04-
14-08 + micronutrients provided seedlings with height, number of leaves, leaf area and
total dry mass statistically superior to the seedlings produced without fertilization. The
substrate with higher proportion of clay provided higher height, number of leaves and
leaf area of the seedlings compared to the sandier substrate. The lowest cost of
production of the substrates to produce vigorous seedlings was found on the substrate
more clayey with simple superphosphate application. In the second experiment the
objective was to evaluate the soil preparation and fertilization levels with NPK 04-14-
08 in the planting of five native species in an area degraded by clay extraction. The
type of soil preparation did not influence the development of the species in the field.
Fertilization in the planting with NPK 04-14-08 allowed the tested species to adapt to
the area degraded by clay extraction, and the species Dalbergia ecastaphyllum and
Schinus terebinthifolius showed a more rapid development, while Inga laurina, Protium
heptaphyllum and Psidium cattleyanum had a slower development. In the third
experiment the objective was to evaluate the growth, biomass production, content and
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nutritional efficiency of Ipomoea pes-caprae, cultivated in nutrient solution under
phosphorus concentrations. Growth and biomass production of I. pes-caprae were not
affected by the reduction of the P concentration in the nutrient solution. The
macronutrient contents found even at the lowest concentrations of P, are considered
satisfactory. The most accumulated and efficiently absorbed nutrients were N, K and
Ca, WHEREas P, S and Mg were the most efficiently used by the species. In the fourth
experiment the objective was to propose mathematical equations using linear
dimensions to estimate the leaf area of C. rosea. The leaf area of C. rosea can be
measured quickly, easily and non-destructively through the product of the multiplication
of the length along the main vein with the maximum width of the leaf blade of the last
leaflet, by the determined power model equation.
