Optimum timing of soil scarification for the natural regeneration ofPinus sylvestrisin Central Sweden

2012 ◽  
Vol 27 (5) ◽  
pp. 424-431 ◽  
Author(s):  
Roland Hörnfeldt ◽  
Bin Hu ◽  
Maria Vincenza Chiriacò
Keyword(s):  
Natural Regeneration ◽  
Soil Scarification

scholarly journals Natural Regeneration in a Multi-Layered Pinus sylvestris-Picea abies Forest after Target Diameter Harvest and Soil Scarification

Forests ◽  
2017 ◽  
Vol 8 (2) ◽  
pp. 35 ◽  
Author(s):  
Lars Drössler ◽  
Nils Fahlvik ◽  
Natalia Wysocka ◽  
Karin Hjelm ◽  
Christian Kuehne
Keyword(s):  
Picea Abies ◽  
Pinus Sylvestris ◽  
Natural Regeneration ◽  
Soil Scarification

scholarly journals Effect of soil scarification on natural regeneration of mature scots pine (Pinus sylvestris) stands in Greece

2014 ◽  
Vol 16 (4) ◽  
pp. 732-742 ◽  
Keyword(s):  
Scots Pine ◽  
Natural Regeneration ◽  
Climatic Conditions ◽  
Ground Vegetation ◽  
Soil Scarification ◽  
Pine Stands ◽  
Scots Pine Forest ◽  
Set Up ◽  
Positive Effect ◽  
Scots Pine Stands

<div> <p>The natural regeneration of Scots pine stands at the Sarakatsana location in the Pieria Mountains improved considerably after the removal of the dense ground vegetation followed mechanical soil scarification. The experimental design consisted of replications on scarified and non-scarified soil. The results four years after the experiment was set up showed that regeneration reached 59 seedlings m-2 in scarified and 7 seedlings m-2 in non-scarified soil. Soil scarification seems to have had a positive effect on the emergence and survival of naturally regenerated Scots pine. The negligible number of dead seedlings in the first two measurements could be due to the favourable site and/or good climatic conditions. Although the mother stand appears to be in a critical condition due to age and increased necrosis as a result of fungal attacks, there is still considerable potential for regeneration in terms of fructification and seed production. The study findings indicate that there can be new growth of Scots pine forest with the shelterwood method of natural regeneration in combination with soil scarification.</p> </div> <p>&nbsp;</p>

scholarly journals A role of the mechanical preparation of soil in the natural regeneration of pedunculate oak (Quercus robur L.) in floodplain forests

2012 ◽  
Vol 51 (No. 8) ◽  
pp. 371-379
Author(s):  
K. Houšková
Keyword(s):  
Natural Regeneration ◽  
Seedling Emergence ◽  
Soil Surface ◽  
Floodplain Forest ◽  
Pedunculate Oak ◽  
Mechanical Preparation ◽  
Soil Scarification ◽  
Before And After ◽  
The Subject

The subject of our research was to verify effects of the mechanical preparation of soil in the natural regeneration of pedunculate oak in a floodplain forest. On the site of a&nbsp;hard-wooded floodplain forest at the confluence of the Morava and Dyje rivers (Czech Republic), several sample plots were established differing in the preparation of soil during regeneration, in weeding the plots and in the period of the implementation of soil surface scarification before and after the fall (or distribution) of acorns. On the basis of results obtained, mechanical preparation of soil on non-weed-infested plots in the heavy seed year is not necessary, however, it supports seedling emergence from acorns and eliminates weed tree emergence and weed. However, it is better to realize it only after the fall of acorns and to incorporate them into soil and thus their emergence will be increased. Soil scarification can be carried out also in the course of harvesting the parent stand through the extraction of wood and slash from the regenerating area. In weed-infested stands, however, the thorough preparation of soil before the fall of acorns appears to be a necessity.

Natural regeneration of jack pine on clay soils following harvesting and site preparation: Seventh-year results

2010 ◽  
Vol 86 (4) ◽  
pp. 423-433 ◽  
Author(s):  
Martin Béland ◽  
Sébastien Calmels ◽  
Yves Bergeron
Keyword(s):  
Natural Regeneration ◽  
Pinus Banksiana ◽  
Block Design ◽  
Jack Pine ◽  
Clay Soils ◽  
Pine Plantation ◽  
Mixed Stands ◽  
Growing Seasons ◽  
Randomized Complete Block Design ◽  
Soil Scarification

This study examines the operational feasibility of six treatments to regenerate jack pine (Pinus banksiana Lamb.) naturally without fire following harvesting on clay soils in the southeastern boreal forest of Quebec. The experiment is a randomized complete block design. Techniques used were a final cutting in 1993 with manual on-site delimbing or roadside delimbing combined with three methods of soil scarification (WadellTM, La TaupeTM and a control) performed in the Spring of 1994 compared to an adjacent jack pine plantation established in 1994 after Wadell scarification. Seven growing seasons later, the present article compares stand composition, competing vegetation, regeneration and growth of jack pine between the different treatments as well as an adjacent plantation. Natural regeneration produced mixed stands with an adequate 52% average jack pine stocking. Roadside and on-site delimbing produced similar jack pine stocking on average. However, the plantation showed 83% stocking and better performance than natural regeneration in terms of height (2.48 m vs. 1.7 m for natural regeneration), diameter (41 mm vs. 22 mm for natural regeneration) and jack pine dominance. Therefore, if natural regeneration is desired, roadside delimbing is to be recommended since it provides sufficient seed and does avoid early jack pine growth reductions caused by slash. On clay soils, scarification seems to have been optional. Nevertheless, it slightly increased seedling growth and in this way, the treatment combining road-side delimbing and an extensive scarification can be an effective jack pine natural regeneration treatment.Key words: Pinus banksiana Lamb., natural regeneration, stocking coefficient, delimbing, scarification, boreal mixed wood, seedlings

scholarly journals Soil scarification favors natural regeneration of Pinus pinea in Lebanon forests: Evidences from field and laboratory experiments

2020 ◽  
Vol 459 ◽  
pp. 117840
Author(s):  
Joseph Nakhoul ◽  
Mathieu Santonja ◽  
Catherine Fernandez ◽  
Stéphane Greff ◽  
Anne Bousquet-Mélou ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Laboratory Experiments ◽  
Pinus Pinea ◽  
Soil Scarification

Effects of Thinning, Patch Clearcutting, Site Preparation, and Planting on Development of Yellow Birch in Quebec

1988 ◽  
Vol 5 (4) ◽  
pp. 248-251 ◽  
Author(s):  
Marcien R. Roberge
Keyword(s):  
Natural Regeneration ◽  
Sugar Maple ◽  
Site Preparation ◽  
Yellow Birch ◽  
Partial Mortality ◽  
Soil Scarification ◽  
Quality Health ◽  
Artificial Seeding

Abstract This is a report of a 1964 thinning and patch clearcutting to increase the proportion of yellow birch in a sugar maple-yellow birch stand in the Dudswell Forest. In 1984, 20 years after treatment, improved quality, health, and growth of thinned stands were observed. Dieback or partial mortality of the crown varied between 0 and 10% in thinned plots and between 25 and 50% in unthinned plots. Despite this dieback in unthinned plots, net growth between 1979 and 1984 was 6 m3/ha. The abundant natural regeneration was growing well, especially in the openings created by clearcutting. Soil scarification, with or without yellow birch artificial seeding, stimulated yellow birch establishment, but the effect did not persist and had disappeared by 1969 or within 5 years. Planting yellow birch increased the number of dominant yellow birch saplings in 1969 and in 1974 or for 10 years. In 1979, when the first release cutting was carried out in the patches clearcut 15 years before, yellow birch dominated in 4% of the subplots; this increased to 18% after the release cutting. From 1979 to 1984, released yellow birch saplings doubled in diameter and were of better quality than the unreleased ones. North. J. Appl. For. 5:248-251, December 1988.

Natural regeneration of jack pine following harvesting and site preparation in the Clay Belt of northwestern Quebec

1999 ◽  
Vol 75 (5) ◽  
pp. 821-831 ◽  
Author(s):  
Martin Béland ◽  
Yves Bergeron ◽  
Richard Zarnovican
Keyword(s):  
Natural Regeneration ◽  
Jack Pine ◽  
First Year ◽  
Seedling Density ◽  
Vegetation Control ◽  
Pine Regeneration ◽  
Soil Scarification ◽  
Second Year ◽  
Abundance And Distribution ◽  
Positive Effect

A 36-ha experiment was carried out to assess the possibility of naturally regenerating jack pine stands following harvesting on clay soils of northwestern Quebec. Although differences between treatments were not statistically significant, there was a trend toward a positive effect of one treatment combining on-site delimbing and scarification with the Silva Wadell™ cone scarifier on jack pine seedling density (up to 10 000/ha) and distribution (50% of 1 m2 plots with at least one seedling, corresponding to 94% with 4 m2 plots), two years after harvest. However, scarified microsites contained fewer seedlings than expected and undisturbed humus contained more seedlings than expected. This result, contrary to what is generally reported in the literature may be explained either by the fairly humid conditions, favourable to germination and seedling establishment, occurring on clay sites or by the scarifier spreading the cone-bearing slash outward. Seedling abundance and distribution improved substantially from the first year to the second year following treatment. Although the irregular branch distribution over the cutover area appears to have limited regeneration success, combining on-site delimbing with soil scarification could lead to relatively good stocking of jack pine regeneration that could be enhanced by some fill-planting. This regeneration method could constitute an alternative to planting jack pine on clay. However, vegetation control to remove aspen competition might be necessary. Key words: jackpine, silviculture, natural regeneration, boreal mixed wood

Climate resilience through natural regeneration in degraded natural forests of south-eastern hilly region of Bangladesh

2019 ◽  
Vol 48 (3) ◽  
pp. 417-425
Author(s):  
Md Khayrul Alam Bhuiyan ◽  
Md Akhter Hossain ◽  
Abdul Kadir Ibne Kamal ◽  
Mohammed Kamal Hossain ◽  
Mohammed Jashimuddin ◽  
...  
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Diversity Indices ◽  
Acacia Auriculiformis ◽  
Quantitative Structure ◽  
Natural Forests ◽  
Climate Resilience ◽  
Hilly Region ◽  
Major Cluster ◽  
Ecological Dominance

A study was conducted by using 5m × 5m sized 179 quadrates following multistage random sampling method for comparative regenerating tree species, quantitative structure, diversity, similarity and climate resilience in the degraded natural forests and plantations of Cox's Bazar North and South Forest Divisions. A total of 70 regenerating tree species were recorded representing maximum (47 species) from degraded natural forests followed by 43 species from 0.5 year 39 species from 1.5 year and 29 species from 2.5 year old plantations. Quantitative structure relating to ecological dominance indicated dominance of Acacia auriculiformis, Grewia nervosa and Lithocarpus elegans seedlings in the plantations whereas seedlings of Aporosa wallichii, Suregada multiflora and Grewia nervosa in degraded natural forests. The degraded natural forests possess higher natural regeneration potential as showed by different diversity indices. The dominance-based cluster analysis showed 2 major cluster of species under one of which multiple sub-clusters of species exists. Poor plant diversity and presence of regenerating exotic species in the plantations indicated poor climate resilience of forest ecosystem in terms of natural regeneration.

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