84 uppsatser · sida 3 av 6
… study was to compare how the population of pine (Pinus sylvestris) and spruce (Picea abies) have changed between 1927 and 2013 in the oak landscape south of Linköping. A field study was carried out in 22 two kilometre lines which also had been studied in 1927. In these lines …
… av dessa trädsorter jämfördes diameter och höjdtillväxt med gran (Picea abies) och björk (Betula pubescens). Mätningarna utfördes på lokaler i Strömsunds kommun i Jämtlands län vid Näxåsen (Strömsund) och runt Jorm i Frostviken på SCA:s marker
… har de tillväxthämmande effekterna mellan blånadssvamparterna Ophiostoma picea, Grosmannia penicillata och Ceratocystis polonica undersökts. De tillväxthämmande effekter svamparna utövar på varandra har studerats visuellt med odlig i artificiellt såväl som naturligt medium …
är produktionen hållbar?
The aim of this report was to investigate the hypothesis that Norway spruce (Picea abies L. Karst), planted on poor ”Scots pine” stands will not have sustained growth during the whole rotation, due to water deficit in the closed stands. In order to investigate this hypothesis …
en studie åt Holmen Skog AB
… till Lycksele och för de olika trädslagen tall (Pinus sylvestris) och gran (Picea abies). Huvudsyftet med kalibreringen har varit att skatta värdet på SIH givet att man vet värdet på SIS och andra ståndorts- och beståndsegenskaper. Eftersom SIS i sig är en funktion av …
… and 145 in the sparse shelter. Below the shelters and on one open area spruce (Picea abies) were planted in 1990. Due to heavy gracing a fence was built spring 1993. Beech (Fagus sylvatica), douglas fir (Psedotsuga menziesii) and pine (Pinus sylvestris) and spruce were planted …
The aim of this work is to demonstrate how the net present value (NPV) at the time of the first thinning depends on the spacing after pre-commercial thinning, and show how net value from first thinning in same stand is influenced. This study is performed with models based on …
… the most severe damage earlier than normal and instead regenerate with spruce (Picea abies) if the site index is good? - Is it profitable to cross-cut damaged stands differently? This exam work was done as an assignment to Bergvik Skog. It was performed as an inventory and a …
… between the tree species Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.). Another question of issue was if there were differences in the growth response between trees of different sizes. It is within the framework of the National Board of Forestry’s …
… diseased stands where over-represented on land that former hold Norway spruce (Picea abies). Two different definitions were used. The analysis revealed that some of the districts in the three analysed regions showed a larger amount of diseased stands than others. These …
… since the middle ages. The use of shelter wood cutting in Norway spruce (Picea abies (L.) Karst.) forests in Sweden met a revival in the early 1990s as an alternative for the dominating clear-cutting system when silvicultural costs increased dramatically for the latter …
… Forestry. The aim of this report was to investigate how often Norway spruce (Picea abies L. Karst), is planted on poor Scotch pine (Pinus Silvestries) sites and if it affects the yield of Norway spruce? In order to investigate this, data from 29 stands witch had a lower site …
… and different historical use. Abundance and regeneration of Norway spruce (Picea abies (L.) Karst.) were high in north sloping stands. The volume of dead wood was generally high in all stands, but the proportion of dead wood with large (> 25 cm) diameters and within late decay …
… defence to pine weevils in Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) and to compare the effect of MJ between pine and spruce. In addition a complementary greenhouse experiment was conducted with the same aims as above and to determine the amount of resin …
Tree fiber lengths controls properties like strength and smoothness in paper and other wood products. For forest researchers it is of interest to be able to determine the fiber lengths in standing trees. Mörling et al. (2003), among others, have developed methods to estimate …
