scholarly journals Influence of partial serotiny of Aleppo pine, Italian, and Arizona cypress on seed germination

2006 ◽  
pp. 123-134
Author(s):  
Mihailo Grbic ◽  
Dragana Kalicanin ◽  
Matilda Djukic ◽  
Danijela Djunisijevic
Keyword(s):  
Comparative Analysis ◽  
Seed Germination ◽  
Natural Regeneration ◽  
Pine Forest ◽  
Aleppo Pine ◽  
Cupressus Sempervirens ◽  
Different Ages ◽  
Pine Cones ◽  
Cupressus Arizonica

The usability of seeds for the production of seedlings, as well as the utilisation potential of seeds for natural regeneration was assessed by the comparative analysis of seed germination from the cones of different ages of three species with partial serotiny (P. halepensis Mill., Cupressus sempervirens L., Cupressus arizonica Greene). In cypress, serotiny is not so expressed as to be a reserve for extraordinary situations (fire). Fouryearold Aleppo pine cones should be collected for production purposes. Serotinous cones up to ten years old are efficient for natural regeneration of Aleppo pine forest after fire.

scholarly journals The contribution of natural and artificial regeneration at the restoration of fire-affected peri-urban forest of Thessaloniki (Northern Greece)

2017 ◽  
Vol 19 (1) ◽  
pp. 29-36
Keyword(s):  
Natural Regeneration ◽  
Urban Forest ◽  
Burned Area ◽  
Cupressus Sempervirens ◽  
Northern Greece ◽  
Mixed Stands ◽  
Artificial Regeneration ◽  
Pinus Brutia ◽  
Stem Quality ◽  
Cupressus Arizonica

<p>In this study, the post-fire regeneration of three coniferous species (<em>Pinus brutia, Cupressus sempervirens </em>and<em> Cupressus arizonica)</em> was examined in the peri-urban forest of Thessaloniki, Northern Greece. The wildfire took place in July 1997 and burned almost 60% of the forest vegetation. During the autumn of 2010, 34 experimental plots were established in all aspects within the burned area. In each experimental plot the following measurements were carried out: height, diameter at breast height and crown projection in two perpendicular diameters. The results show that the <em>Pinus brutia </em>individuals, most of which came from natural regeneration, presented the best growth, in relation to the two other species in all aspects. As for <em>Cupressus sempervirens</em>, equal parts of which came from natural and artificial regeneration was characterized by remarkable growth especially in the Northeastern aspect. Finally, <em>Cupressus arizonica</em> existed in all aspects except the Northeastern. It also presented a satisfactory development, especially on the Southern aspect. Fourteen years after the fire pure or mixed stands of the above mentioned species show vigorous growth and good stem quality. Finally, the rates of participation of individual forest species indicate that the restoration has been achieved mainly by natural regeneration.</p>

scholarly journals Appropriate Removal of Forest Litter is Beneficial to Pinus tabuliformis Carr. Regeneration in a Pine and Oak Mixed Forest in the Qinling Mountains, China

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 735
Author(s):  
Xueying Huo ◽  
Dexiang Wang ◽  
Deye Bing ◽  
Yuanze Li ◽  
Haibin Kang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Seed Germination ◽  
Natural Regeneration ◽  
Mixed Forest ◽  
Forest Litter ◽  
Pine Forest ◽  
Qinling Mountains ◽  
Mixed Forests ◽  
Pinus Tabuliformis ◽  
Plant Ash

Research Highlights: Natural regeneration is important in pine–oak mixed forests (Pinus armandii Franch., Pinus tabuliformis Carr., and Quercus aliena Bl. var. acuteserrata Maxim.ex Wenz.), but allelopathy as a limiting factor has not been studied. Our research provides insights into allelopathy in pine–oak mixed forest litter. Background and Objectives: Allelopathy among tree species occupying the same ecological niche in mixed forests may adversely affect regeneration. We studied allelopathy in pine and oak forest litter to determine the effect on regeneration, whether it is offset by adding activated carbon or plant ash, and what allelopathic substances are present. Materials and Methods: We used laboratory seed culture and field seeding to determine pine and oak litter regeneration effects on P. tabuliformis and P. armandii in the Qinling Mountains, China. In the laboratory, we irrigated seeds with three different litter concentrations. A fourth treatment incorporated activated carbon. The field study established small quadrats in mixed forest to study how removing or retaining litter and spreading plant ash affected sown seeds. High performance liquid chromatography–mass spectrometry was used to compare differences in chemical substances in extracts with and without activated carbon. Results: Litter extracts significantly affected germination rates in both species. Seedling morphological and physiological indexes showed that litter extracts negatively affected growth in both species, but activated carbon alleviated this inhibitory effect on P. armandii. Forest stand and litter did not affect P. armandii seed germination. Pinus tabuliformis germination rates were significantly higher in plots with removed litter than when litter was retained or plant ash spread, and lower in oak than pine forest. Allelopathic substances detected in pine forest were trioctyl trimellitate, amyloid β-Peptide 10–20, and triisobutyl phosphate, potentially affecting P. armandii seed germination and growth. Conclusions: Appropriate removal of litter in mixed forests can improve the natural regeneration ability of P. tabuliformis.

Analysis of natural regeneration of Scots pine forest in the high Campine after a fire

1988 ◽  
Vol 53 ◽  
Author(s):  
N. Lust
Keyword(s):  
Scots Pine ◽  
Natural Regeneration ◽  
Fire Regime ◽  
Pine Forest ◽  
Seed Supply ◽  
Regeneration Period ◽  
The Social ◽  
Short Period ◽  
Fire Area ◽  
Scots Pine Forest

The  study deals with the spontaneous resettlement of a fire area, after  destruction of 600 ha Scots pine forest. The following items have been  examined in particular: the composition of the tree species, the duration of  the regeneration period, the influence of the parent stand, the exposition,  the slope, the treatment, the fire regime and the social differentiation.      The resettlement took place very quickly and over a very short period.  Birch and Scots pine take up 95 % of the stem number. The regeneration result  is precarious, yet mostly good. The parent stand is favourable both to seed  supply and to microclimate, but only over a short distance. The Scots pine  prefers more open and dry areas, whereas birch needs more humidity.     Practice has shown that natural regeneration of Scots pine stands is  possible. The forest treatment, however, is very important. It determines not  only the immediate result of the regeneration, but also the composition and  the structure of the future stand.

Effect of traffic-induced air pollution on seed germination of Arizona Cypress (Cupressus arizonica Green) and Black Pine (Pinus nigra Arnold)

2020 ◽  
Vol 55 ◽  
pp. 126841
Author(s):  
Zahra Babapour Aliyar ◽  
Abbas Banj Shafiei ◽  
Nasrin Seyedi ◽  
Salar Rezapour ◽  
Saeed Musavi Moghanjugi
Keyword(s):  
Air Pollution ◽  
Seed Germination ◽  
Pinus Nigra ◽  
Black Pine ◽  
Cupressus Arizonica

scholarly journals Seed Germination in Cistus ladanifer: Heat Shock, Physical Dormancy, Soil Temperatures and Significance to Natural Regeneration

Plants ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 63 ◽  
Author(s):  
Luís Silva Dias ◽  
Isabel Pires Pereira ◽  
Alexandra Soveral Dias
Keyword(s):  
Heat Shock ◽  
Seed Germination ◽  
Natural Regeneration ◽  
Heat Load ◽  
Fire Effects ◽  
Ground Vegetation ◽  
Cistus Ladanifer ◽  
Physical Dormancy ◽  
Soil Temperatures ◽  
Heat Loads

Seeds of Cistus ladanifer experience bursts of germination following fires. The effects of heat shock from 10 °C to 150 °C on seed germination were investigated by final germination plus the number of days required for germination to start and finish, and symmetry of cumulative germination. The occurrence of physical dormancy in C. ladanifer seeds was investigated by a variety of methods, including imbibition, scanning electron microscopy (SEM) and light microscopy, and use of dyes. The significance of responses of C. ladanifer seeds to fires was investigated essentially by abstracting existing literature and by using fire effects models and simulations. Parameters of germination were variously affected by heat treatments—positively in the range 80–100 °C, negatively above 130 °C. Non-dormancy was consistently found in about 30% of seeds but no evidence was obtained to support the existence of physical dormancy in the dormant fraction of C. ladanifer seeds. Two complementary processes seem to be in place in seeds response to fire. A direct fire-driven increase in germination of virtually all seeds in response to the appropriate heat load produced by fire or, in the absence of such heat loads, the germination of the non-dormant fraction provided that above-ground vegetation burns.

scholarly journals Estimation of Total Biomass in Aleppo Pine Forest Stands Applying Parametric and Nonparametric Methods to Low-Density Airborne Laser Scanning Data

Forests ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 158 ◽  
Author(s):  
Darío Domingo ◽  
María Lamelas ◽  
Antonio Montealegre ◽  
Alberto García-Martín ◽  
Juan de la Riva
Keyword(s):  
Laser Scanning ◽  
Nonparametric Methods ◽  
Pine Forest ◽  
Airborne Laser Scanning ◽  
Aleppo Pine ◽  
Total Biomass ◽  
Low Density ◽  
Forest Stands ◽  
Airborne Laser

scholarly journals TYPOLOGY, PRODUCTIVITY AND DYNAMICS OF ALEPPO PINE STANDS IN THE OUARSENIS MASSIF (ALGERIA)

AGROFOR ◽  
2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Mohamed SARMOUM ◽  
Rafael NAVARRO-CIRRILLO ◽  
Frederic GUIBAL ◽  
Fatiha ABDOUN
Keyword(s):  
Natural Regeneration ◽  
Basal Area ◽  
Aleppo Pine ◽  
Direct Influence ◽  
Forest Species ◽  
Wood Production ◽  
Silvicultural Management ◽  
Long Time ◽  
Pine Stands ◽  
Semi Arid

Aleppo pine is the most important forest species in Algeria. This species has been used for a long time in reforestation programs, notably the “green dam” planted in the 1970s. Despite this importance, the Aleppo pine continues to undergo all kinds of degradation such as land clearing, illegal cutting and fire. This situation is causing reduction of potential wood production, also jeopardizing the vitality of the stands and their regeneration. This work aims to describe the typology, productivity and dynamics of Aleppo pine stands in the Ouarsenis massif (West of Algeria). 27 plots were installed to describe the stands (composition of forest species, dbh , total height, and basal area). Regeneration was estimated by the rate of juvenile individuals (dbh5cm). The results obtained shows that the Aleppo pine develops different conditions for altitude, climate and type of soil. These conditions have a direct influence on the structure of the Aleppo pine and its productivity. The best populations develop on an average altitude (500 to 1400 m), in subhumid and semi-arid climates, on southern exposures and on limestone soils. The stands are mostly young (age 70 years) with good natural regeneration. These results put focus on the factors of degradation of the Aleppo pine, in particular the recurring fires and the lack of silvicultural management which application can improve the productivity and the vitality of the stands.

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