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304 Uppsatser om Norwegian spruce (Picea abies) - Sida 8 av 21

Stormskador i stickvägsgallrade bestånd i sydvästra Sverige :

A storm in January 2005 felled 75 millions cubic metres of forest in South Sweden. Previous studies of wind damage in thinned stands indicated the importance of early thinnings. The risks of wind throw increased by increasing age and height of the stands. Previous studies also indicated increasing risk of wind throw along the strip roads. The aim of the present study was to investigate wind damage in Norway spruce stands in South Sweden in relation to time of the first thinning and different pattern of strip roads (width, length and direction).

De norska grottmålningarna och ljuset

The relation between the cave and the circumpolar light conditions has long been a part of the interpretation of the meaning of the Norwegian cave art. This paper explores the relationship by trading the concept of a sensory dichotomy between light and darkness for that of a perceptual relationship between the paintings, the environment and the light..

Commercial thinning and its potential for contribution to the timber supply in British Columbia?s Interior forests : a look at Finnish and Swedish forest practices and their applicability in British Columbia?s Interior forests

Thinning is the partial removal of trees in a forest stand prior to final harvest. The term can be divided in pre-commercial thinning where little if any volume is removed from the stand and commercial thinning where removals are intended to provide a positive economic result. From a silvicultural point of view, the goal of thinning is to enhance future crop tree quality by removing low-quality stems and providing sufficient space for the accelerated development of retained ones (Huuskonen & Hynynen, 2006). The goals of this study was to see if commercial thinning could positively affect the short and medium term timber supply (MTTS) in the Interior regions of British Columbia (BC), and whether or not Scandinavian forestry practices could be adopted in the BC context. The mountain pine beetle (Dendroctonus ponderosae Hopkins) has created significant forest planning problems in BC. The annual allowable cut (AAC) was raised to capture beetle-killed timber while still merchantable.

Rotutveckling och tillväxt i fält hos granplantor odlade i kopparbehandlade odlingssystem

Sedan täckrotplantornas introduktion i slutet av 1960 talet har man försökt att hittaodlingsätt som minskar rotformationer (t ex rotsnurr och rotknän) hos plantorna. Närrötterna är deformerade ökar risken för instabilitet, stamkrökar, tjurved, rotröta ochrotbrott hos trädet. Många olika behållartyper har tagits fram under åren. En av desenaste metoderna för att undvika deformationer går ut på att odlingsbehållarnas insidorbeläggs med en kopparbaserad färg. Metoden innebär att rötterna, då de kommer emotden belagda kanten, slutar att växa på längden, roten går som i dvala.

Kaliumgödsling på torvmark - effekt på tillväxten hos planterade granar (Picea abies)

Peat  lands  are  a  great  potential  resource  for  increased  forest  growth  in  Sweden, there  are  approximately  6.5  million  hectares  of  peat  lands,  whereof  around  70% produce less wood than one m3sk/ha and year and are therefore classed as forest waste  land.  There  are  over  200  000  hectares  of  peat  land  that  is  already  drained and  wooded,  and  that may  be  suitable  for  fertilization.  Forest  production  on  peat soils  usually  requires  drainage  and  fertilization.  Dewatering  requires  ditching  the area, so that the roots can have access to oxygen. Nitrogen is often abundant in the peat but other nutrients; especially potassium is in short supply. The  purpose  of  this  work  was  to examine  the effects  of  potassium  fertilization  on the  growth  of  spruces  that  were  planted  on  drained  peat  land  and  how  different amount of fertilizers affects the growth. Potassium deficiency is strongly growth inhibiting, since potassium is important for substance  transport  in  the  tree.  Potassium  is  also  important  for  the  carbohydrate formation, and because increasing the sugar content of the cells constitutes a lower freezing temperature does potassium availability in the soil play a major role in the winter  resistance  of  many  species.  Potassium  is  not  found  in  any  organic compounds in the tree, but is present in cell and tissue fluids. A fertilization trial was started in 1978 in Siljansfors Experimental Forest. The plots in the experiment were fertilized with different amounts of potassium and one plot was  left  without  fertilization.  All  plots  that  were  fertilized  with  potassium  grew considerably better than the unfertilized plot. The difference in production between the unfertilized plot and the plot that received the most potassium was 7.2 m3sk/ha and year. The unfertilized plot can still be classified as waste land. The theoretical production capacity was estimated using a Swedish system for site quality  estimation  of  wetlands  after  ditching  (dikningsbonitering).  The  plot  with most  potassium  produced  after  fertilizationaproximately  in  level  with  theoretical estimations.  Key  words:  Peat  land,  Fertilization,  Ditching,  Growth,  site  quality..

Produktivitet vid stubblyftning :

Stump wood was used between 1850 and 1950 for production of tar and as firewood. In the 1950s the use decreased because of the introduction of the cheap fossil oil. In the 1970s stump wood became an interesting issue again as a raw material for the pulp industry. Stump lifting has today become a possible source for bioenergy. The objectives with this study were to investigate the productivity of stump lifting and stump extraction, and to analyse the economy.

Europeiseringens inverkan på svensk deklarerad utrikespolitik

Abstract The purpose of this study is to examine if the Swedish policy of foreign affairs has been changed due to the Swedish enter as members in the European Union. The research method used for this essay has been a comparative case study between the Swedish and Norwegian declared policy of foreign affairs and it strives to answer the research question, which is if the Swedish declared policy of foreign affairs has been changed in character due to the Europeanization. The theoretical framework of this study consists of Europeanization as a comprehensive theoretical perspective. I order to answer the research question a classification schedule has been elaborated to examine the objectives of the Swedish and Norwegian declared policy of foreign affairs. The analytical method of this part has been a quantitative and qualitative approach.

Hur ska tall- och gran bestånd i Götaland gallras för att minska risken för vindskador?

With knowledge of how the southern Swedish forests have been affected by storms the past years, this study intended to find out which factors affect the storm firmness of a stand the most. The study was based on data from stands in the, by the storm Gudrun, affected area. The results of the analyses that tested the stand factors that influence the amount of storm damage to the greatest extent showed that the storm sensitivity of Norway spruce stands were largely due to previous management actions. The factors that could be controlled by thinning and had relevance of storm damage standpoint, according to the results were; the dominant height, volume, basal area weighted mean diameter and stand age at last thinning. In this study, these results are not as clear for Scots pine.

?dn?ris?: att b?ja st?nger till t?ltk?ta

This thesis is my exploration of the immaterial heritage that is the craft of bending of ?dn?ris? out of spruce. It?s a broken tradition that is scarcely described, mainly through Yngve Ryd?s report T?ltk?tor (1999) that contains interviews with two knowledge keepers, Nilas Tuolja and Johan Rassa. Yngve Ryd?s report went against the earlier opinion by the mid 20th century ethnologist Ernst Manker who claimed that they were only made exclusively out of mountain birch that has curved growth. As a background, I discuss the special importance of heritage conservation, both material and immaterial, in a S?mi context as being an indigenous people.

Thuja plicata - etableringsförsök av jättetuja med fyra olika provenienser

Future climate changes may lead to an interest of alternative and foreign forest tree species in order to spread the risks in forestry. Douglas fir, Sitka spruce, Freemont cottonwood and hybrid aspen are examples of popular foreign tree species that along with western red cedar could have a future in the Swedish forests.Södra Skogsägarna and SLU have collaboration in establishment of foreign species in Swedish forests.The purpose of this study was to analyze and present the establishment of western red cedar, and to survey and illustrate injuries of freeze drying and other damages like deer browsing, vegetation and insect attacks. The study included four different provenances, and spruce as a reference, planted in two locations ? Asa and Släne.Western red cedar is despite its name a conifer of the cupressaceae family with defined secondary characteristic and gets along well with an overstory. Western red cedar grows often in mixed stands with similar conifers and its natural habitat is within and in the area near to British Columbia.The study included two series of field inventories, one made in the summer and one in the autumn 2013, three growing seasons after plantation.

"Heja Sverige! Heia Norge!" : En kritisk diskursanalys av nationalism inom svensk och norsk sportjournalistik med fokus på bevakningen av Skid-VM i Falun 2015

The purpose of this essay, entitled ?Heja Sverige! Heia Norge?, was to study the difference in nationalistic tendencies between Swedish and Norwegian news coverage of the 2015 FIS Nordic World Ski Championships in Falun, Sweden, which took place between 18 February and 1 March 2015. It was the fourth time the event took place in Falun, previous games having been held in 1954, 1974 and 1993.I performed a critical discourse analysis of a total of twelve articles split over two race days ? one where Swedish athletes outperformed Norwegian athletes and vice versa. I did this order to study if the news coverage in each of the two countries? most promininent sports papers; Sportbladet in Sweden and VG Sport in Norway, was charaterized by a nationalistic discourse, as well as comparing the two to find similarities and differences between them.Having based my analysis on theories and previous research regarding media events, nationalism, national identities, ?us and them?, imagined communities et cetera, I came to the conclusion that a nationalistic discourse is, without a doubt, present in the news coverage ? something very unique for sports journalism as a genre.

Svensk-norska unionsupplösningen i läroböckerna.

Sammanfattning/Abstract Olsson Nina ( 2005) Svensk-norska unionsupplösningen i läroböckerna. The Swedish - Norwegian union in textbooks. Gymnasielärarutbildningen, Historievetenskap och lärande. Lärarutbildningen, Malmö högskola. Syfte Syftet med detta arbete är att undersöka och jämföra hur den svensk- norska unionsupplösningen har behandlas i norska och svenska läroböcker i historia.

Skötselmetoder för bestånd med produktions- och naturvårdsmål :

This study is made on assignment by the local board of forestry in Skåne, Blekinge and Halland. The change of the forest law 1994 brought a new type of management plan. A more active planning was introduced in order to equate the environment goal with the production goal. The purpose with this study is to give a better picture of how planning for nature conservation in production forest is made and to develop support for selection of silviculture methods for stands with combined goals. With combined goals means production forestry with a reinforced consideration to both nature and culture, called PF-classified stands. This was done by: ? Describing silviculture models from the literature that are possible to use for stands with combined goals. ? Describing silviculture models that is used in practice in stands with combined goals. ? Describing how the classification of stands with combined goals is used. Which means, were in the terrain, with which frequency and in which type of forest PF-classification is used. ? Comparing differences and similarities of theoretical and practical used models. The study was done partly as a literature study and partly as an interview study of forest planners.

Överlevnad, skador och höjdutveckling 1-2 år efter plantering i södra Sverige : tall, gran, björk, hybridasp och poppel

Kravet på användning av förnyelsebara energikällor ökar, år 2020 ska de stå för 50 % av all energianvändning. För att öka utbudet av skogsbränsle och utveckla bränslekedjan i hållbar riktning måste ny kunskap och teknik utvecklas för intensivodling av snabbväxande trädslag på skogsmark. Mot denna bakgrund har ett trädslagsförsök anlagts i södra Sverige, med syftet att på sikt besvara frågorna kring intensivodling av skog. Avgången hos plantor är som störst under de första åren efter plantering för att därefter plana ut vid cirka 10 års ålder. Överlevnaden under föryngringsfasen beror i hög grad på vilken utsträckning snytbaggar förekommer samt vilka åtgärder man vidtagit för att få så bra etablering av plantorna som möjligt. Syftet med studien var att undersöka överlevnaden, skador och höjdutvecklingen för de ingående trädslagen tall, gran, björk, hybridasp och poppel, 1 till 2 år efter plantering. Resultatet visade en lägre överlevnad andra året jämfört med första året. Detta berodde delvis på en okänd skada hos poppeln, som troligtvis också hade inverkan på höjdutvecklingen.

Vindfällning, tillväxt och plantuppslag i en 13-årig granskärm i Medelpad :

The interest for alternative forest regeneration methods increased significantly during the 1990´s after 50 years dominance of the clear-cutting system (Holgén & Hånell 2000). One reason for this was that clear-cutting was being more and more questioned by different envi-ronmental organizations and because the forest sector for economical reasons wanted to find cheaper ways to regenerate forests. In the beginning of the 1990´s two shelterwood experi-ments were established in a joint effort by Svenska Cellulosa Aktiebolaget (SCA) and the Dept of Silviculture, Swedish University of Agricultural Sciences (SLU). The experiments include various forms of cutting and shelterwood densities and represent productive spruce forests in central and north Sweden (Roggsjön in the province of Medelpad and Skikkis-jöberg in the province of Västerbotten, respectively ). The experiment next to Roggsjön has been reported earlier in three MSc theses, and is also the focus of this thesis.

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