Condicionamento de sementes florestais visando a recuperação de áreas degradadas pela exploração petrolífera na Amazônia brasileira
This thesis is divided into two parts. In the first part, three degraded areas by oil exploration in Coari (Amazonas State) at the “Base Operacional Geólogo Pedro de Moura” (BOGPM), were selected to evaluate their revegetation after (a) installing perches, (b) spreading out additional top-soil or...
| Autor principal: | Calvi, Geângelo Petene |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/5106 http://lattes.cnpq.br/3129084768943101 |
| Resumo: |
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This thesis is divided into two parts. In the first part, three degraded areas by oil exploration in
Coari (Amazonas State) at the “Base Operacional Geólogo Pedro de Moura” (BOGPM), were
selected to evaluate their revegetation after (a) installing perches, (b) spreading out additional
top-soil or (c) mounting cohorts of dead branches. The preliminary results indicated a
significant increase of seedling density with additional top-soil, while the other techniques
showed no alteration compared to the control in the first four months after installation of the
experiment. With the aim to accelerate the recuperation of these areas by direct sowing, the
second part of this thesis was dedicated to improve seed priming of two tree species from non
flooded tropical forest of the Amazon. Parkia multijuga Benth seeds were imbibed to
different hydration levels at 15 ºC before subsequent slow drying at 25 ± 1 ºC and 64 ±2 %
UR comparing hydropriming by submersion in aerated water with matriconditioning between
moistened cotton clothes. Only matriconditioning increase significantly germination rate and
speed. However, because the imprecision in the inference of moisture content on seeds after
pre-established imbibition time and difficult seed handling using moistened cotton clothes,
was necessary the technique improvement. Subsequently matriconditioning in plastic bags
with moistened vermiculite (1 g vermiculite : 2,5 g water) was tested at 15 ºC with seeds of
P. multijuga and Jacaranda copaia (Aubl.) D. Don. This technique improved significantly the
germination percentage and speed of low quality seeds of both species. Imbibition for 4 hours
increased germination performance of J. copaia seeds from 24 % (Mean Germination Time -
MGT 30,0 d) to 48 % (MGT 28,4 d); and imbibition for 2 days of P. multijuga seeds from a
63 % (MGT 23,2 d) to 82 % (MGT 20,7 d). Although other seed lots should be tested before
recommending a protocol, the matriconditioning with moistened vermiculite increased
germination performance of seeds of two species tested. |