Development of single oak trees in a mixed coniferous stand
Pedunculate oak (Quercus robur) and sessile oak (Quercus petraea) are important tree species in the southern half of Sweden. Oak trees house a large biological fauna and can have high value timber. Managing oaks in pure stands is common but a large portion of oak is found in admixed in coniferous st...
| Autor principal: | |
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| Formato: | Second cycle, A2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2015
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| Acceso en línea: | https://stud.epsilon.slu.se/8415/ |
| _version_ | 1855571347147587584 |
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| author | Frick, Joakim |
| author_browse | Frick, Joakim |
| author_facet | Frick, Joakim |
| author_sort | Frick, Joakim |
| collection | Epsilon Archive for Student Projects |
| description | Pedunculate oak (Quercus robur) and sessile oak (Quercus petraea) are important tree species in the southern half of Sweden. Oak trees house a large biological fauna and can have high value timber. Managing oaks in pure stands is common but a large portion of oak is found in admixed in coniferous stands. The aim of the study was to investigate the growth of single oaks in a multi-layered, conifer-dominated mixed stand in relation to thinning method, competing trees and age.
The study was conducted in Tönnersjöheden experimental forest in southern Sweden on 100-year old pine stand with naturally regenerated spruce and oak. The area was divided into different target diameter harvest treatments and thinned 2008-2009. 90 oaks were sampled for the single tree analyses, 30 trees for the age analyses and data from long-term study was used for thinning comparison.
Results revealed that oak trees in the thinned stands grew significantly more than the control. The difference between various thinning treatments was not significant. Oaks with a higher number of neighbouring Norway spruce grew less than oaks with few or no neighbouring spruce trees. Any effect on growth of the distance to or size of the neighbouring tree was not found. The age of the measured trees was 38-68 years and the age had a positive relation to DBH and tree height.
Due to the light demanding nature of oak, thinning is essential for sufficient growth of suppressed oak trees. How the thinning is conducted was found to be less important in this study. The effect on growth by neighbour trees of different species was noticed while the size or distance to neighbours was not, implying that a focus on the tree species (in this case Norway spruce) is important when thinning to promote oak growth. |
| format | Second cycle, A2E |
| id | RepoSLU8415 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2015 |
| publishDateSort | 2015 |
| record_format | eprints |
| spelling | RepoSLU84152015-08-27T10:46:31Z https://stud.epsilon.slu.se/8415/ Development of single oak trees in a mixed coniferous stand Frick, Joakim Forestry - General aspects Pedunculate oak (Quercus robur) and sessile oak (Quercus petraea) are important tree species in the southern half of Sweden. Oak trees house a large biological fauna and can have high value timber. Managing oaks in pure stands is common but a large portion of oak is found in admixed in coniferous stands. The aim of the study was to investigate the growth of single oaks in a multi-layered, conifer-dominated mixed stand in relation to thinning method, competing trees and age. The study was conducted in Tönnersjöheden experimental forest in southern Sweden on 100-year old pine stand with naturally regenerated spruce and oak. The area was divided into different target diameter harvest treatments and thinned 2008-2009. 90 oaks were sampled for the single tree analyses, 30 trees for the age analyses and data from long-term study was used for thinning comparison. Results revealed that oak trees in the thinned stands grew significantly more than the control. The difference between various thinning treatments was not significant. Oaks with a higher number of neighbouring Norway spruce grew less than oaks with few or no neighbouring spruce trees. Any effect on growth of the distance to or size of the neighbouring tree was not found. The age of the measured trees was 38-68 years and the age had a positive relation to DBH and tree height. Due to the light demanding nature of oak, thinning is essential for sufficient growth of suppressed oak trees. How the thinning is conducted was found to be less important in this study. The effect on growth by neighbour trees of different species was noticed while the size or distance to neighbours was not, implying that a focus on the tree species (in this case Norway spruce) is important when thinning to promote oak growth. Ek (Quercus robur) och bergek (Quercus petraea) är viktiga trädslag i Sverige. Eken hyser en stor biologisk fauna och har ett högt timmervärde. Skötsel av ek i rena bestånd är en vanlig metod, dock finns en stor andel av eken i blandade bestånd. Syftet med studien var att undersöka enskilda ekars tillväxt i en barrblandskog i relation till gallringsmetod, konkurrerade träd samt ålder. Studien utfördes i en 100-årig barrblandskog med naturligt föryngrad ek i Tönnersjöhedens försökspark i södra Sverige. Området har delats in i olika typer av måldiameterhuggning och gallring utfördes 2008-2009. 90 ekar valdes ut till den enskilda analysen av ek, 30 till åldersanalysen och till behandlingsanalysen användes data från långtids studier på området. Resultatet visade att ekar i gallrade bestånd växte signifikant mer än de i kontrollytan. Skillnaden mellan måldiameterhuggningarna var dock inte signifikant. Ekar med ett stort antal gran som grannar växte mindre än ekar med få eller inga granar som grannar. Någon effekt på tillväxten av avståndet till eller storleken av grannarna hittades inte. Åldern de mätta träden var 38-68 år och ålder hade en positiv relation till brösthöjdsdiameter samt trädets höjd. På grund av ekens krav på ljus är gallring av bestånd essentiellt för ekens tillväxt. Hur gallringen utförs är mindre viktigt. En effekt på ekens tillväxt av trädslaget på grannen hittades medan effekten av storleken eller avståndet till grannen inte hittades, vilket visar på att fokus på trädslag är viktigare vid gallring i syfte att gynna ekens tillväxt. 2015-08-21 Second cycle, A2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/8415/7/frick_j_150827.pdf Frick, Joakim, 2015. Development of single oak trees in a mixed coniferous stand. Second cycle, A2E. Alnarp: (S) > Southern Swedish Forest Research Centre <https://stud.epsilon.slu.se/view/divisions/OID-295.html> urn:nbn:se:slu:epsilon-s-4776 eng |
| spellingShingle | Forestry - General aspects Frick, Joakim Development of single oak trees in a mixed coniferous stand |
| title | Development of single oak trees in a mixed coniferous stand |
| title_full | Development of single oak trees in a mixed coniferous stand |
| title_fullStr | Development of single oak trees in a mixed coniferous stand |
| title_full_unstemmed | Development of single oak trees in a mixed coniferous stand |
| title_short | Development of single oak trees in a mixed coniferous stand |
| title_sort | development of single oak trees in a mixed coniferous stand |
| topic | Forestry - General aspects |
| url | https://stud.epsilon.slu.se/8415/ https://stud.epsilon.slu.se/8415/ |