scholarly journals Extension of the planting period of Norway spruce container seedlings: risks related to the drought – growth stage dynamics and handling practices

10.14214/df.3 ◽  
2005 ◽  
Vol 2005 (3) ◽  
Author(s):  
Pekka Helenius
Keyword(s):  
Norway Spruce ◽  
Growth Stage ◽  
Container Seedlings ◽  
Handling Practices

scholarly journals Effects of heavy thinnings on the increment and selection of trees for tending in Norway spruce monoculture in natural hazard conditions

2017 ◽  
pp. 31-54
Author(s):  
Martin Bobinac ◽  
Sinisa Andrasev ◽  
Andrijana Bauer-Zivkovic ◽  
Nikola Susic
Keyword(s):  
Norway Spruce ◽  
Growth Stage ◽  
Natural Hazard ◽  
Basal Area ◽  
Growth Potential ◽  
Stand Age ◽  
Diameter Increment ◽  
Volume Increment ◽  
Selection Of ◽  
Area And Volume

The paper studies the effects of two heavy selection thinnings on the increment of Norway spruce trees exposed to ice and snow breaks in eastern Serbia. In a thinning that was carried out at 32 years of age, 556 candidates per hectare were selected for tending, and at the age of 40, of the initial candidates, 311 trees per hectare (55.9%) were selected as future trees. In all trees at 41-50 age period, diameter increment was higher by 31%, basal area increment by 64% and volume increment by 67% compared to 32-40 age period. The collective of indifferent trees is significantly falling behind compared to future trees in terms of increment values in both observed periods. However, the value of diameter, basal area and volume increments, of the collective of "comparable" indifferent trees are lower in comparison to the values of increments of future trees by 10-15% in the 32-40 age period, and by 15-21% in the 41-50 age period and there are no significant differences. The results show that heavy selective thinnings, initially directed at a larger number of candidates for tending at stand age that does not differ much from the period of carrying out first "commercial" thinnings, improve the growth potential of future and indifferent trees, where it is rational to do the tree replacement for the final crop in "susceptible" growth stage to snow and ice breaks.

scholarly journals Extending the planting period of dormant and growing Norway spruce container seedlings to early summer

Silva Fennica ◽  
2005 ◽  
Vol 39 (4) ◽  
Author(s):  
Jaana Luoranen ◽  
Risto Rikala ◽  
Kyösti Konttinen ◽  
Heikki Smolander
Keyword(s):  
Norway Spruce ◽  
Early Summer ◽  
Container Seedlings

scholarly journals Covering Norway spruce container seedlings with reflective shading cloth during field storage affects seedling post-planting growth

New Forests ◽  
2021 ◽  
Author(s):  
Mikko Tikkinen ◽  
Johanna Riikonen ◽  
Jaana Luoranen
Keyword(s):  
Norway Spruce ◽  
Grey Mould ◽  
Storage Conditions ◽  
Climatic Conditions ◽  
Test Field ◽  
Stem Water Potential ◽  
Negative Effects ◽  
Seedling Mortality ◽  
Container Seedlings ◽  
Growing Seasons

AbstractThe field storage of container seedlings is often a necessity after the seedlings have been transported from nurseries close to the regeneration area. Suboptimal storage conditions can lead to reduced growth or even seedling mortality. Supporting favourable conditions for the seedlings during storage requires labour, especially for the watering of seedlings, and therefore increases the costs of forest regeneration. In this study, we examined the effects of covering Norway spruce container seedlings with a reflective shading cloth and neglecting the watering during field storage. This was done by measuring the drying of the seedlings during field storage, the rooting of the seedlings when planting, and the subsequent survival and performance in the field two and three growing seasons after planting. The study comprised one-year-old Norway spruce container seedlings covered with reflective shading cloth and seedlings with no cover (subject to rainfall) in 2012 and 2013; additionally, in 2013, replicates from both treatments were stored in conditions where rainfall was impeded. The stem water potential was measured, a rooting test was carried out, and the seedlings were planted in the test field weekly over 42 days of field storage without watering. As a novel finding, the results indicate that covering the seedlings with a reflective shading cloth during the field storage increased the risk of grey mould in summer storage and led to negative effects regarding post planting seedling development. The application of a shading cloth directly on the seedlings cannot be recommended to prolong the watering intervals during field storage in the current climatic conditions in Southern Finland, where the risk of grey mould is high.

Effect of Drought on Growth and Mortality of Actively Growing Norway Spruce Container Seedlings Planted in Summer

2002 ◽  
Vol 17 (3) ◽  
pp. 218-224 ◽  
Author(s):  
Pekka Helenius ◽  
Jaana Luoranen ◽  
Risto Rikala ◽  
Kari Leinonen
Keyword(s):  
Norway Spruce ◽  
Container Seedlings

scholarly journals Structural diversity change and regeneration processes of the Norway spruce natural forest in Babia hora NNR in relation to altitude

2012 ◽  
Vol 52 (No. 9) ◽  
pp. 399-409 ◽  
Author(s):  
J. Vorčák ◽  
J. Merganič ◽  
M. Saniga
Keyword(s):  
Norway Spruce ◽  
Growth Stage ◽  
Dead Wood ◽  
Developmental Stages ◽  
Mineral Soil ◽  
Structural Diversity ◽  
Virgin Forest ◽  
Diameter Structure ◽  
Regeneration Processes ◽  
Diameter Differentiation

The research was focused on exploring the dynamics and forms of regeneration processes and structural diversity of the Norway spruce virgin forest in Babia hora NNR in relation to altitude. In each developmental stage <br />19 sample plots were established. The structural diversity was assessed by the indices proposed by Clark and Evans (1954), F&uuml;ldner (1995) and Jaehne and Dohrenbusch (1997). Concerning the spatial distribution of the trees in the virgin forest no tendency to their clustering with the increasing altitude was found in the zones below 1,460&nbsp;m. The influence of the altitude was confirmed in the zone above 1,461&nbsp;m where the groups of &ldquo;family spruces&rdquo; are typical. Diameter differentiation was significantly higher in the growth stage. Evaluation of this attribute in terms of the altitude detected significant diameter differentiation at an altitude below 1,260&nbsp;m in the growth stage. According to the F&uuml;ldner index the virgin forest has generally medium differentiated diameter structure. According to the complex index by Jaehne and&nbsp;Dohrenbusch (1997) the differentiation of the virgin forest decreases with the ascending altitude up to 1,460&nbsp;m, where the compact forest ends. Evaluation of the seedbed revealed that 46.2% of the naturally regenerated individuals were growing on mineral soil, 52.4% on dead wood and 1.4% on wind-thrown roots. Regarding the developmental stages 46% of the individuals were found in growth stage, 23% in optimum stage and 31% in breakdown stage.

Sign in / Sign up

Export Citation Format

Share Document