Seed weight and container capacity effects on emergence and early growth of the Mediterranean oak (Quercus suber L.) seedlings in nursery

2019 ◽  
Vol 45 (2) ◽  
pp. 89-98
Author(s):  
Samir Benamirouche ◽  
Mebarek Chouial ◽  
Wiam Guechi
Keyword(s):  
Seed Weight ◽  
Quercus Suber ◽  
Early Growth ◽  
The Mediterranean ◽  
Container Capacity

Decline and dieback of cork oak (Quercus suber L.) forests in the Mediterranean basin: a case study of Kroumirie, Northwest Tunisia

2019 ◽  
Vol 31 (5) ◽  
pp. 1461-1477 ◽  
Author(s):  
Issam Touhami ◽  
E. Chirino ◽  
H. Aouinti ◽  
A. El Khorchani ◽  
M. T. Elaieb ◽  
...  
Keyword(s):  
Mediterranean Basin ◽  
Quercus Suber ◽  
Cork Oak ◽  
The Mediterranean ◽  
The Mediterranean Basin

Climate response of cork growth in the Mediterranean oak (Quercus suber L.) woodlands of southwestern Portugal

2016 ◽  
Vol 38 ◽  
pp. 72-81 ◽  
Author(s):  
A. Costa ◽  
I. Barbosa ◽  
C. Roussado ◽  
J. Graça ◽  
H. Spiecker
Keyword(s):  
Quercus Suber ◽  
Climate Response ◽  
Cork Growth ◽  
The Mediterranean

scholarly journals Effect of climate change on the spatial distribution and cork production of Quercus suber L., the risk of exclusion by the Aleppo pine expansion, and management practices to protect Q. suber habitat: A review

2021 ◽  
Vol 49 (1) ◽  
pp. 12218
Author(s):  
Kaouther MECHERGUI ◽  
Wahbi JAOUADI ◽  
Amal S. ALTAMIMI ◽  
Souheila NAGHMOUCHI ◽  
Youssef AMMARI
Keyword(s):  
Climate Change ◽  
Spatial Distribution ◽  
Management Practices ◽  
Quercus Suber ◽  
Cork Oak ◽  
Aleppo Pine ◽  
Cork Production ◽  
Future Global Warming ◽  
The Future ◽  
The Mediterranean

Climate change represents an important challenge for forest management and the silviculture of stands and it is known that climate change will have complex effects on cork oak forest ecosystems. North Africa and the Mediterranean basin are especially vulnerable to climate change. Under the effect of climate change, cork oak will disappear from a large area in the future, and the rest will migrate to higher altitudes and latitudes. This study aimed to evaluate the effect of climate change on the spatial distribution of Quercus suber L. and cork production in the Mediterranean area, and the risk of its exclusion by the Aleppo pine (Pinus halepensis Mill.) expansion. The literature review showed that up to 40% of current environmentally suitable areas for cork oak may be lost by 2070, mainly in northern Africa and the southern Iberian Peninsula. Temperature directly influences atmospheric evaporative demand and should affect cork productivity. Precipitation is the main factor that positively influences cork growth and several authors have confirmed the negative effect of drought on this growth. Currently, cork oak habitats are colonized in several places mainly by the Aleppo pine. Under climate change, Aleppo pine is projected to occupy higher altitude sites and several authors have predicted that current and future global warming will have a positive influence on Aleppo pine growth in wet sites. In the future and under climate change, there is a strong possibility that the Aleppo pine will colonize cork oak habitat. Finally, we proposed management practices to protect cork oak against climate change and Aleppo pine expansion.

Characterization of Cork Oak (Quercus Suber) Wood Anatomy

IAWA Journal ◽  
2009 ◽  
Vol 30 (2) ◽  
pp. 149-161 ◽  
Author(s):  
Vicelina B. Sousa ◽  
Sofia Leal ◽  
Teresa Quilhó ◽  
Helena Pereira
Keyword(s):  
Mediterranean Area ◽  
Vessel Diameter ◽  
Structural Features ◽  
Quercus Suber ◽  
Cork Oak ◽  
Oak Wood ◽  
Cork Production ◽  
Water Conduction ◽  
The Mediterranean ◽  
Perforation Plates

The cork oak (Quercus suber L.) is important for ecological and socioeconomic sustainability and nature conservation in the Mediterranean area. Anatomical and structural features of cork oak wood were characterized at two sites in Portugal, including never-debarked trees and trees under cork production. Cork oak wood showed semi-ring porosity, solitary vessels with simple perforation plates, and large rays. Vessels were arranged in a diagonal to radial pattern, larger and more abundant in earlywood, and gradually decreasing in intermediate and latewood. In trees under cork production vessel distribution and frequency were altered, with more frequent and smaller pores, and a less distinct porosity pattern. Vessel diameter, element length and frequency were 133 ± 49 μm, 433 ± 103 μm and 2.9 ± 0.5 vessels/mm2 for never-debarked trees and 139 ± 50 μm, 341 ± 100 μm and 5.1 ± 1.5 vessels/mm2 for debarked trees. Multiseriate ray width ranged 0.15–1.04 mm, and uniseriate ray height 9.1–791.3 μm. Fibres had a mean length of 1.15 ± 0.20 mm. Vasicentric tracheids were frequent. Tyloses and crystals were commonly present. The anatomical features of cork oak wood favour water conduction and mechanisms of drought adaptation to the Mediterranean climate. The wood can also adapt to cork removal.

Effect of seed weight, and seed phosphorus and nitrogen concentrations on the early growth of wheat seedlings

1990 ◽  
Vol 30 (4) ◽  
pp. 545 ◽  
Author(s):  
DGDe Marco ◽  
Marco DG De
Keyword(s):  
Seed Weight ◽  
Nitrogen Concentration ◽  
Seedling Emergence ◽  
Dry Weight ◽  
Early Growth ◽  
Sand Culture ◽  
Wheat Seedlings ◽  
P Content ◽  
Nitrogen Concentrations ◽  
High Concentrations

Wheat seeds of uniform weight selected from 3 batches of seed with phosphorus (P) concentrations of 0.14, 0.17 and 0.19% were sown in soil with a range of applied P treatments. Seedling emergence was more rapid the higher the seed P. By 25 days after sowing all plants grown at the highest concentration of applied P were similar in size, but with lower applied P, plants from seed with higher P concentrations had an advantage. A range of weight classes was selected from 2 batches of seed raised at low or high concentrations of P. There were 11 groups ranging in mean seed weight from 28 to 58 mg and in seed P from 0.13 to 0.37%. Seedlings from the high P batch had larger first leaves, a higher dry weight, and longer roots than those from the low P batch when grown in a highly P-deficient sand culture system. Within each batch, heavier seeds produced larger leaves, heavier plants and longer roots. The yield differences between batches were largely accounted for if the seed P content (�g P/seed) was considered rather than either percentage P or seed weight alone. Differences in seed nitrogen concentration or content did not consistently account for differences in seedling growth.

Sign in / Sign up

Export Citation Format

Share Document