The effect of different treatments on carob seed germination was studied.
The results showed that, seed scarification was the most effective method in
increasing germination rate as well as the use of concentrated sulfuric acid for 30 minutes
reac
hing 100%, followed by the treatment with alcohol for 60 minutes, and immersing
seeds in hot water for 60 minutes.
The results also indicated that the speed of germination when seeds were scarified
was the best (I.D.=14.5), followed by the treatment with concentrated sulfuric acid for 30
minutes (I.D.=21.5), alcohol for 60 minutes (I.D.= 38) and immersing seeds in hot water
for 60 minutes (ID.=60).
This study was carried out in a protected area at Rangeland and Dry
Environment Research Station, belongs to ACSAD and Aleppo university in
the Muslumieh, Aleppo, during 2004, by cultivating 11 plant species belong to
three different families, Fab
aceae (3 species), Poaceae (7 species) and Rosaceae
(one species), using 4 moisture Levels (5, 10, 15 and 20 mm), and 6 seeding
depths (0, 1, 2, 3, 5 and 7 cm). Results showed that the seeds of all the
investigated species failed to germinate at the moisture level of 5 mm, while
Onobrychis sativa (36.2%), Agropyron elongatum (53.9%), Agropyron cristatum
(36.1%), Phalaris tuberose (41.1%), Dactylis glomerata (12.2%) and
Sanguisorba minor (1.12%) germinated under 10 mm humidity. The seeds of all
investigated species germinated at the higher moisture levels (15 and 20 mm),
but the germination ratio varied between the species. The seeds of all studied
species were capable of germinating when placed at the soil surface and seeding
depth of 3 cm. The seeds of Agropyron elongatum (73.3%), Agropyron cristatum
(13.3%), Phalaris tuberosa (36.7%) were capable of germinating at depth of 5
cm. The seeds of all studied species failed to germinate at a the planting depth
of 7 cm.
This study was carried out on three rootstocks of Crataegus monogyna Jacq.
With one seed containing fruit C.oxycantha L. with three seeds as well as C.
azaraolus Borkh, to identify the best method of Crataegus propagation.
The hardwood cuttings of
C.azarolus Borkh rooted in a IBA solution (4ooo
ppm)showed the highest rooting percentage 20% when grown in sand as well as
peat moss containing fermented arganic manure media.
This research aims study the effect of different treatments in activate and increase
percentage of germination Cupressus arizonicaL.seeds to use plants in forestation projects,
seeds were get from mature conifers, and tested by different treatments
with control, then
cultured within polyethylene bags many times to calculate indicators of germination. The
results showed that the soaking the seeds Cupressus arizonicaL. in citric acid 0.1% with
cold wet stratification for 30 days at 4-5c gave higher germination percentage 75%.The
treatments of the soaking seeds in sulfuric acid0.1% and hydroxide sodium 0.1% with cold
wet stratification for 30 days gave respectively 60%-53% .But superiority was not
significant. Other treatments; soaking the seeds in tap water 24h with cold wet
stratification for 30 days gave only 36%.But the control treatment gave lower germination
percentage of all just only 9%.
The treatment of soaking seeds in citric acid 0.1% with cold wet stratification for 30
days surpassed the rest of the treatments in effect on plant height at the end of the
experiment.
