We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of thinning and fertilisation on tracheid dimensions and lignin content of Norway spruce.
- Authors
Tuula Jaakkola; Harri Mäkinen; Pekka Saranpää
- Abstract
AbstractThe effects of the intensity and timing of commercial thinning and fertilisation on tracheid properties and lignin content of Norway spruce [Picea abies(L.) Karst] were studied in two long-term fertilisation-thinning experiments in central and eastern Finland. The experiments consisted of three thinning and three fertilisation treatments in a randomised block design. Fertilisation levels were: unfertilised (F0), 150 kg N ha-1(F1), and 300 kg N ha-1(F2). Thinning treatments were: delayed first thinning (T0), normal thinning (T1), and intensive first thinning (T2). A total of 85 trees were sampled 26 years after treatment onset. Tracheid length was measured for 24 trees and cell wall thickness and lumen diameter for 16 trees grown under treatments F0T0, F0T2, F1T0, and F1T2. Lignin content was determined for all trees sampled (n85) grown in all the different treatment combinations. We found only small differences in tracheid length (0–6), cell wall thickness (1–17) and lumen diameter (0–9), depending on the different fertilisation and thinning conditions. We also found only slightly (1–2) higher lignin content for fertilised (F1and F2) than for unfertilised (F0) trees (25.8 and 26.0 vs. 25.4). Trees yielded 26.0 lignin content after intensive first thinning (T2), 25.9 following normal thinning (T1), and 25.4 after delayed first thinning (T0). Thus, the prevailing fertilisation and thinning practice for Norway spruce stands in Finland may not cause essential changes in tracheid properties and lignin content.
- Subjects
FINLAND; NORWAY; WOOD chemistry; NORWAY spruce; LIGNINS; FOREST products
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2007, Vol 61, Issue 3, p301
- ISSN
0018-3830
- Publication type
Article
- DOI
10.1515/HF.2007.059