Sökresultat:
311 Uppsatser om Norway spruce - Sida 21 av 21
Naturlig föryngring av skog
Populärvetenskaplig sammanfattning: Målsättningen med detta projekt var att undersöka vilka trädslag som dominerar vid naturlig föryngring samt vilka faktorer som påverkar föryngringsresultatet. Bakgrunden till projektet är en önskan från Skogstyrelsen i Höör att få en bättre uppfattning om hur situationen ser ut i skogarna då allt fler skogsägare väljer naturlig föryngring på sina marker. Syftet med undersökningen är att skogsvårdsstyrelsen med stöd från våra resultat, ska kunna ge ett bättre stöd och råd till markägare som överväger naturlig föryngring. Projektet ska även kunna ge stöd vid uppföljning och tillrättarvisning av markägare som ej fullgjort sina lagstadgade åtaganden, att något måste göras om de misslyckats med föryngringen.Studien genomfördes i Höör och Hörby kommun i centrala Skåne. Kommunerna ligger på gränsen mellan gran och lövbältet varför de lämpar sig väl för studien.
Prevalence of congenital defects in Swedish Hampshire, Landrace and Yorkshire pig breeds and opinions on their prevalence in Swedish commercial herds
This study concerns congenital defects in pigs; umbilical and scrotal hernia, cryptorchidism, kyphosis, splay legs, anal atresia, intersexuality and congenital tremor. The aim was to describe and estimate the prevalence of these defects and estimate the heritability for the most frequent defects, scrotal hernia and cryptorchidism in purebred Swedish Hampshire, Landrace and Yorkshire populations. Furthermore, information and opinions from herdsmen in commercial herds was collected and analysed. A low proportion of congenital defect pigs is of importance both from animal welfare and economic point of view. The accuracy of registration of the presence of defects in the litters has a decisive role for the ability to select against these defects.
Jaktprov hos brittiska stående fågelhundar
In 1996 a hunting test for British gun dogs was started in Sweden, based on a similar one al-ready in place in Norway. The aim of the new test was to describe the hunting ability of the dog and to use the results as a basis for selection. However, up to now, no genetic study of these data has been done. Therefore the aim of this study was to estimate genetic parameters for the traits measured in the hunting test and to investigate whether the traits can summarized into fewer overall measures.
Data from trails of British gundogs between 1996 and 2005 in Sweden were used to estimate genetic parameters and environmental effects in hunting performance. British gundogs consist of five different breeds: Pointer, English setter (ES), Gordon setter (GS), Irish red setter (Irl S) and Irish red and white setter.
En internationell jämförelse av miljölagstiftning avseende växtnäringsläckage med ursprung i jordbruket
SAMMANFATTNINGÖvergödning har de senaste åren blivit en stor och omdebatterad fråga i många EU- länder.Även om problemen har minskat en del är detta inte tillräckligt, vi ser fortfarande fiskdöd,syrefria bottnar och giftiga algblomningar. Hur långt ska vi gå för att kunna övervinnaövergödningsproblemen? Genom olika sorters lagstiftning, ekonomiska styrmedel ochrådgivning har vi nått en bit på vägen, men fortfarande krävs det mycket arbete innan vi haruppnått målet. Jordbruket har pekats ut som en av de största källorna till övergödning pågrund av överskottet av kväve och fosfor som varje år urlakas ur våra jordbruksmarker.Inom EU finns sedan 1991 en gemensam lagstiftning; Nitratdirektivet. Syftet med direktivetär att minska nitratföroreningar och andra föroreningar från jordbruket, då dessa påverkarsåväl yt- och grundvatten som kust- och havsvatten.
Morfologisk och kemisk beskrivning av en svensk rabarbersamling (Rheum raponticum L.) :
SAMMANFATTNING
Mitt examensarbete utgör ett led i Nordiska Genbankens (NGB) uppgift att skapa en nordisk
s.k. ?core collection? av rabarber, Rheum rhabarbarum L. Samlingar finns även i våra
nordiska grannländer Norge, Finland, Danmark och Island. I Sverige har ett insamlingsarbete
av rabarber pågått under åren 2002 och 2003 för att komplettera en äldre samling.
Den skogliga informationens roll i ett kundanpassat virkesflöde : en bakgrundsstudie samt simulering av inventeringsmetoders inverkan på noggrannhet i leveransprognoser till sågverk
This MSc thesis is divided into two parts. The first part deals with the need for information
from forest campartments selected for clear cutting, in connection with planning in an
integrated forest- and sawmill enterprise. A review of literature is followed by a case stud y,
where present conditions in a Swedish forest company are compared with current research in
the area. The seeond part consists of a simulation stud y, which aims at camparing the
accuracy of inventory estimates using different methods. The estimates are delivery forecasts,
covering one month consumptian of timber in a large sawmill.
Bevarande av hotade epifytiska lavar och vedsvampar i Norrbottens län : rödlistan som verktyg i praktisk naturvård
Många arter påverkas idag negativt av skogsbruket. Detta visar sig dels i ett växande antal arter på den svenska Rödlistan. I Norrbottens län är idag närmare 500 skogslevande arter rödlistade, och dessa är fördelade över flera olika organismgrupper. Det stora antalet rödlistade arter i skog innebär att det är svårt att direkt utifrån Rödlistan utforma effektiva naturvårdsåtgärder samt generell hänsyn inom skogsbruket. Genom att sammanställa och
strukturera information om de rödlistade arternas krav på livsmiljö och hotsituation kan Rödlistan som verktyg utvecklas.
Att restaurera forna tiders beståndsstruktur : ett exempel från Jämtgaveln
In Sweden today so-called "prescribed nature conservation burning" is performed due to the change in silvicultural law, certification and an increased knowledge regarding the field of fire in the forest landscape. The aim is to re-create structures and qualities made by the fire regimes of the past, though on a much smaller geographical scale. The structures and qualities to be re-created are for example broad leaf stands, trees with large diameter, heterogeneous stands regarding variables such as age and diameter. If we increase our knowledge of the constitution of forests characterized by fire, then we will be able to set goals for what achievements to reach both on landscape scale and stand scale.
The aim of this paper is to try to describe how a stand from the past was composed regarding mainly the spatial arrangement and compare it with the stand of today in the same place. This to be done by using relict material, that is stumps and dead standing trees.
Rätten till Norrland : nutida strider, historisk arena
An introduction to the complexity which surrounds the matters of land in the northern parts of Sweden was the purpose of this thesis. The agriculture colonization, the delimitation and the development of forestry and mining business were big events which are shown from the view of property rights. The situation of the Lappish people and how their situation has changed through the history was the main theme of the thesis. Hopefully this thesis will also serve as a support while reading for example investigations published by the government and judgments by courts.
Supply to the resources of nature has always been decisive for the survival of humans.
Friluftsliv i staden : tillfällig landskapsarkitektur på sex platser i Linköping 3-15 april 2012
The subject of this project focuses on how
Landscape Architects by their profession can
explore and directly make a difference in the
cityscape. This paper documents the process of art -
based research practice. The purpose of installing
temporary activities is to encourage people in the
city to discover, participate and invite people to be
more playful in the city.
My experience of interaction in public spaces comes
primarily from the education within landscape
architecture, from site-specific art installations I have
performed in different cities and from observations
of landscape architecture, street art and urban life in
the cities of Vienna, Berlin and Linköping. It is
fascinating and inspiring to see how the urban space
can invite and allow visitors to participate and
therefore feel invited to the open space. As a
landscape architect I wish to create urban spaces
that are useful and inspiring for their visitors.
The projects main question: How can you make
temporary landscapes that encourage outdoorinspired
activities at selected locations in the city? is
answered by practice based research, an approach
in which theoretical research are developed through
practical experiments in the designing- and
implementation process.
EU ger eko bland korna - från uppbundet till lösdrift :
ABSTRACT
For hundreds of years there has been a tradition with tethered dairy cows in Sweden. The last
decades the old fashioned way to hold cows have been questioned and the number of dairy
cows in loose housing has been increasing. Last year (2004) 19 percent in total of all farms
with milk production in Sweden had their cows in loose housing. Because of EU-legislation
concerning all organic production no farms are allowed to build tie stalls any more and after
2010 all organic dairy cows are supposed to live in loose-housing systems.
The aim of the thesis was mainly to find out the number of farms with tethered organic dairy
cows and if they will continue after the year 2010. Furthermore the purpose was to study if
there are any regional differences, how countries similar to Sweden interpret the EU-decision
about tethered cows and differences in buildings between organic and conventional farms and
the reasons to them.