2 research outputs found
Volumetry and survival of native and exotic species in the gypsun pole of Araripe, PE
Nos setores industriais e comerciais da regi\ue3o do Araripe, em
Pernambuco, a utiliza\ue7\ue3o de combust\uedveis lenhosos
est\ue1 dirigida aos processos de desidrata\ue7\ue3o da gipsita e
produ\ue7\ue3o de gesso em suas diferentes tecnologias. Dessa
forma, o presente estudo teve como objetivo buscar op\ue7\uf5es
para suprir a demanda por lenha no Polo Gesseiro do Araripe
pernambucano, por meio da implanta\ue7\ue3o de povoamentos
florestais com esp\ue9cies nativas e ex\uf3ticas. O experimento foi
instalado na Esta\ue7\ue3o Experimental do Instituto
Agr\uf4nomico de Pernambuco (IPA), utilizando nove esp\ue9cies,
entre nativas e ex\uf3ticas: (Imburana \u2013 Amburana cearense
(Allem\ue3o) A.C. Sm.; Angico \u2013 Anadenanthera colubrina
(Vell.) Brenan var. cebil (Griseb.) Altschul; Jurema \u2013 Mimosa
tenuiflora (Willd.) Poir.; Sabi\ue1 \u2013 Mimosa
caesalpiniaefolia Benth.; Ac\ue1cia \u2013 Senna siamea (Lam.)
H.S. Irwin & Barneby; Leucena \u2013 Leucaena leucocephala
(Lam.) R. de Wit.; Algaroba \u2013 Prosopis juliflora (Sw.) D.C.;
Ip\ueas \u2013 Tabebuia sp.1 e Tabebuia sp.2), em um delineamento
inteiramente casualizado com diferentes n\ufameros de
repeti\ue7\uf5es. Foram avaliados os seguintes par\ue2metros:
volume em metro c\ufabico (m3) e sobreviv\ueancia. Com
rela\ue7\ue3o ao volume em metro c\ufabico, o Sabi\ue1 teve a
melhor produtividade. O Sabi\ue1 e a Jurema foram as esp\ue9cies
mais pesadas. E em rela\ue7\ue3o \ue0 sobreviv\ueancia,
Ip\uea 2 e Imburana tiveram as maiores mortalidades. Desta forma, o
Sabi\ue1 e a Jurema s\ue3o as esp\ue9cies mais indicadas para a
produ\ue7\ue3o de lenha em plantios comerciais homog\ueaneos na
Chapada do Araripe em Pernambuco.In the industrial and commercial sectors of the Araripe Region in
Pernambuco, Brazil, fire wood is the used in processes of dehydration
and production of gypsum with different technologies. Thus, this study
aimed to find alternatives to supply the demand of firewood in the
Gypsun Pole of Araripe in Pernambuco through the implementation of
forest with native and exotic species. The experiment was installed at
the Experimental Station of the Agronomic Institute of Pernambuco
(IPA), using nine species, both native and exotic: (Imburana - Amburana
cearense (Allem\ue3o) A.C. Sm.; Angico - Anadenanthera colubrina
(Vell.) Brenan var. cebil (Griseb.) Altschul; Jurema - Mimosa
tenuiflora (Willd.) Poir.; Sabi\ue1 - Mimosa caesalpiniaefolia
Benth.; Ac\ue1cia - Senna siamea (Lam.) H.S. Irwin & Barneby;
Leucena - Leucaena leucocephala (Lam.) R. de Wit.; Algaroba -
Prosopis juliflora (Sw.) D.C.; Ip\ueas - Tabebuia sp.1 e Tabebuia
sp.2). The design was completely randomized with different numbers of
replications. The following parameters were evaluated: volume in cubic
meter (m3) and stereo meters (st) and survival. With regard to the
volume in cubic meter, Sabia had the best production. The Jurema and
the Sabi\ue1 were the heaviest species. In relation to survival, the
Ip\uea 2 and the Imburana had the highest mortalities. Thus, the
Sabi\ue1 and the Jurema are the species indicated for the production
of wood in homogeneous commercial plantations in the Chapada Araripe in
Pernambuco
METHODS FOR OVERCOMING DORMANCY OF QUIXABEIRA SEEDS ( Sideroxylon obtusifolium (Roem.& Schult.) T.D.Penn.)
Devido \ue0 aus\ueancia de informa\ue7\uf5es sobre a
metodologia para avalia\ue7\ue3o da qualidade fisiol\uf3gica de
sementes das esp\ue9cies arb\uf3reas medicinais, o presente
trabalho teve por objetivo determinar o m\ue9todo mais eficiente para
supera\ue7\ue3o da dorm\ueancia tegumentar em sementes de
Sideroxylon obtusifolium (Roem. & Schult.) T.D.Penn.. Al\ue9m
das sementes intactas, sementes que n\ue3o foram submetidas a nenhum
tratamento, tamb\ue9m foram utilizados os seguintes tratamentos
pr\ue9-germinativos: escarifica\ue7\ue3o qu\uedmica - as
sementes foram imersas em \ue1cido sulf\ufarico absoluto por 10,
20, 30, 40, 50 e 60 minutos; escarifica\ue7\ue3o mec\ue2nica - as
sementes foram friccionadas manualmente em lixa n\ub0 50, do lado
oposto \ue0 micr\uf3pila, sem ou com embebi\ue7\ue3o por 24 ou
48 horas; imers\ue3o em \ue1gua a 100\ub0C por 15 ou 30 segundos;
imers\ue3o em \ue1gua a 80\ub0C at\ue9 o resfriamento. Os
efeitos foram avaliados atrav\ue9s de testes de germina\ue7\ue3o
e vigor. Constatou-se que houve diferen\ue7a significativa entre os
tratamentos para todos os par\ue2metros avaliados (porcentagem e
velocidade de germina\ue7\ue3o, comprimento e massa seca de parte
a\ue9rea e raiz prim\ue1ria), e a causa mais evidente da
dorm\ueancia \ue9 a impermeabilidade do tegumento, a qual foi
superada com maior efici\ueancia pelo m\ue9todo de imers\ue3o em
\ue1cido sulf\ufarico por 30 minutos.Due to absence of information about the methodology for the evaluation
of the physiological quality of seeds of medicinal arboreal species
seeds, the aim of the present work was to determine the most efficient
method to overcome the seed coat dormancy in seeds of Sideroxylon
obtusifolium (Roem.& Schult.) T.D.Penn.. Besides the intact
seeds, the ones which had not been submitted to any treatment, the
following pre-germinating methods were used: chemical scarification:
the seeds were immersed in pure sulfuric acid for 10, 20, 30, 40, 50
and 60 minutes at the environment temperature (27\ub0C \ub1
1\ub0C); mechanical scarification: the seeds were rubbed manually in
sandpaper number 50, in the opposite side of micropyle, without and
with soaking for 24 or 48 hours; thermal scarification: immersion in
water at 100\ub0C for 15 or 30 seconds; immersion in water to
80\ub0C until cooling. The effects of treatments were evaluated
through tests of germination and vigor. There were significant
differences among the treatments for all the evaluated parameters
(percentage and speed of germination, length and dry weight of shoot
and root), and the most evident cause of dormancy was the coat
impermeability, which efficiency was overcame by the immersion of seeds
in pure sulfuric acid for 30 minutes