scholarly journals Influence of thinning on spiral grain in Norway spruce grown on highly productive sites in southern Sweden

Silva Fennica ◽  
1999 ◽  
Vol 33 (1) ◽  
Author(s):  
Rolf Pape
Keyword(s):  
Norway Spruce ◽  
Southern Sweden ◽  
Spiral Grain

Vegetation management on grass-dominated clearcuts planted with Norway spruce in southern Sweden

1999 ◽  
Vol 29 (7) ◽  
pp. 1015-1026 ◽  
Author(s):  
Urban Nilsson ◽  
Göran Örlander
Keyword(s):  
Norway Spruce ◽  
Vegetation Management ◽  
Shoot Length ◽  
Southern Sweden ◽  
Vegetation Control ◽  
Containerized Seedlings ◽  
Soil Temperatures ◽  
Stock Type ◽  
Bare Root ◽  
Relative Differences

A field experiment was established between 1989 and 1993 to study the effects of competing vegetation on growth of planted Norway spruce (Picea abies (L.) Karst.) seedlings. Effects of clearcut age, scarification (mounding), herbicide treatment, and seedling stock type were investigated 5 years after planting. On fresh clearcuts, amounts of vegetation were negligible, whereas 2.1-3.7 Mg·ha-1 was found on 4-year-old and older clearcuts. Soil temperatures were about 10% higher in mounds than in undisturbed ground, while herbicide and clearcut age only marginally affected soil temperatures. Seedlings planted on old clearcuts showed significant reductions in growth due to interference from vegetation. Five years after planting, the reduction in growth corresponded to about 1 year's growth. Most of the interaction between seedlings and vegetation occurred during the first 2 years after planting. Thus, scarification was just as effective as repeated herbicide treatments in reducing competition from vegetation. Differences in periods of drought between years could largely explain variation in leading shoot length. However, leading shoot length was affected in the same way irrespective of vegetation control treatments. Five years after planting, the relative differences in diameter between bare-root and containerized seedlings were the same as at the time of planting.

scholarly journals Consequences for bird diversity from a decrease in a foundation species—replacing Scots pine stands with Norway spruce in southern Sweden

2019 ◽  
Vol 19 (5) ◽  
pp. 1429-1440 ◽  
Author(s):  
Matts Lindbladh ◽  
Lisa Petersson ◽  
Per-Ola Hedwall ◽  
Renats Trubins ◽  
Emma Holmström ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Foundation Species ◽  
Bird Diversity ◽  
Southern Sweden ◽  
Pine Stands ◽  
Scots Pine Stands

Effects of mulching and insecticides on establishment and growth of Norway spruce

2006 ◽  
Vol 36 (10) ◽  
pp. 2377-2385 ◽  
Author(s):  
Karin Johansson ◽  
Göran Örlander ◽  
Urban Nilsson
Keyword(s):  
Soil Moisture ◽  
Norway Spruce ◽  
Soil Water Potential ◽  
Experimental Period ◽  
Percent Cover ◽  
Southern Sweden ◽  
Growth Environment ◽  
Competing Vegetation ◽  
Pine Weevils ◽  
Different Depths

Establishment of Norway spruce (Picea abies (L.) Karst.) seedlings is often restricted by competition from vegetation, drought, and damage by pine weevils. In this study, effects of mulching on these factors were investigated. Norway spruce seedlings were planted on fresh and 1-year-old clearcuts treated with mulch on three sites in southern Sweden. Mulch was made of slash from the old stand and applied on whole blocks at three different depths: 0, 10, and 20 cm. Both insecticide-treated and untreated seedlings were planted. By reducing the competing vegetation and improving soil moisture and mineralization, mulching created a favorable growth environment. Mulching significantly improved growth in terms of height, diameter, and volume of the seedlings. Growth continued to increase over time in mulched treatments, probably as an effect of increased nutrient availability. The 20 cm mulch layer generated the greatest increase in growth throughout the 10-year experimental period. Soil moisture was preserved under the isolating mulch layer and during periods of drought soil water potential was significantly higher in mulched treatments. After 2 years, percent cover of competing vegetation was 50%–60% without mulch and 10%–20% with a mulch depth of 20 cm. Insecticide-treated seedlings achieved a survival rate close to 100% in all mulching treatments, whereas survival among untreated seedlings was only 40% on some clearcuts. Mulching alone did not affect survival or abundance of pine weevils.

Natural regeneration of Norway spruce, Scots pine and birch under Norway spruce shelterwoods of varying densities on a mesic-dry site in southern Sweden

2002 ◽  
Vol 161 (1-3) ◽  
pp. 133-145 ◽  
Author(s):  
Urban Nilsson ◽  
Pelle Gemmel ◽  
Ulf Johansson ◽  
Matts Karlsson ◽  
Torkel Welander
Keyword(s):  
Norway Spruce ◽  
Scots Pine ◽  
Natural Regeneration ◽  
Southern Sweden

Predicting spiral grain by computed tomography of Norway spruce

2002 ◽  
Vol 48 (6) ◽  
pp. 479-483 ◽  
Author(s):  
Paul Sepúlveda ◽  
Johan Oja ◽  
Anders Grönlund
Keyword(s):  
Computed Tomography ◽  
Norway Spruce ◽  
Spiral Grain

scholarly journals Genetic parameters for spiral-grain angle in two 19-year-old clonal Norway spruce trials

2002 ◽  
Vol 59 (5-6) ◽  
pp. 551-556 ◽  
Author(s):  
Bj�rn Hannrup ◽  
Michael Grabner ◽  
Bo Karlsson ◽  
Ulrich M�ller ◽  
Sabine Rosner ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Genetic Parameters ◽  
Spiral Grain ◽  
Grain Angle ◽  
Spiral Grain Angle
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