scholarly journals Needle and stem wood production in Scots pine (Pinus sylvestris) trees of different age, size and competitive status

2000 ◽  
Vol 20 (8) ◽  
pp. 527-533 ◽  
Author(s):  
P. Vanninen ◽  
A. Makela
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Wood Production ◽  
Stem Wood

scholarly journals Current state and productivity of age-old experimental plantations of prof. V.D. Ogievsky in the northeastern part of Ukraine

2021 ◽  
Vol 63 (3) ◽  
pp. 195-202
Author(s):  
M. Zhezhkun ◽  
L.V. Demianenko
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Natural Regeneration ◽  
Health Condition ◽  
Pine Plantations ◽  
Mixed Composition ◽  
Natural Origin ◽  
Stem Wood ◽  
Current State ◽  
Pine Stands

Abstract This research is aimed at determining the health condition and productivity of Scots pine (Pinus sylvestris L.) stands created during 1906–1908 on the initiative of Prof. V. D. Ogievsky. The scheme of silvicultural experiments included: determining the influence of different widths and directions of clear felling on the natural regeneration, testing of pine plantations of pure and mixed composition and the choice of methods for their creation. In terms of health condition, 103–105-year-old artificial pine stands are weakened and their health condition is slightly worse compared to the aged pines of natural origin. The productivity of age-old linden-pine plantations is higher than of pure pine plantations, and the stock of stem wood in plantations created by seed sowing and marketability is higher compared to the plantations created by planting seedlings.

Papermaking properties of the ECF-bleached kraft pulps from first-thinning Scots pine (Pinus sylvestris L.)

Holzforschung ◽  
2007 ◽  
Vol 61 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Riikka Rautiainen ◽  
Raimo Alén
Keyword(s):  
Optical Properties ◽  
Pinus Sylvestris ◽  
Scots Pine ◽  
Outer Part ◽  
Strength Properties ◽  
Kraft Pulping ◽  
Kraft Pulps ◽  
Stem Wood ◽  
Softwood Kraft Pulp ◽  
Long Fibers

Abstract First-thinning Scots pine (Pinus sylvestris) and the outer (containing long fibers) and inner (containing short fibers) parts of its stem wood were delignified on a laboratory scale by kraft pulping followed by oxygen-alkali delignification and bleaching with D0(EO)D1(EP)D2. The aim was to evaluate the potential use of the bleached pulps as reinforcing material in various mechanical and chemical pulps. The physical and optical properties of the pulps indicated that only the “outer part pulp”, with rather similar properties to those of a reference softwood kraft pulp, seemed suitable for this purpose. In contrast, materials from first-thinning stem wood and its inner part resulted in lower yields as early as the kraft pulping stage. Rather mediocre strength properties were obtained, but the bleached kraft pulps prepared from the two first thinning-based materials had good optical properties.

Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)

Holzforschung ◽  
2010 ◽  
Vol 64 (1) ◽  
Author(s):  
Riikka Rautiainen ◽  
Raimo Alén
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Black Liquor ◽  
Outer Part ◽  
Short Fiber ◽  
Kraft Pulping ◽  
Hydroxy Acids ◽  
Stem Wood ◽  
Black Liquors ◽  
Average Molecular Masses

Abstract Formation of hydroxy acids and soluble lignin fragments was investigated during conventional kraft pulping of first-thinning Scots pine (Pinus sylvestris L.) stem wood and its long-fiber outer part and short-fiber inner part. The results indicate that there are characteristic differences in the formation of hydroxy acids in these specific tissues, due to the slightly different contents of cellulose, hemicelluloses, and lignin. Notable are the differences in the formation of xylan-derived acids (2-hydroxybutanoic and xyloisosaccharinic acids) and glucomannan- and cellulose-derived acids (3,4-dideoxy-pentonic and glucoisosaccharinic acids). In contrast, no significant differences were found in the average molecular masses of the dissolved lignins in these black liquors. Finally, the black liquor from the outer part of first-thinning pine was shown to have similar properties as the black liquor from the reference mature wood material.

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