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Search for projects with tag "regeneration"

Ätnarova- project continous-cover forestry northwestern Sweden

PI: Fredrik Sjödin

The project aims to compare traditional large area clear-cutting methods to alternative clear-cutting and continous-cover forestry for forests in northwestern Sweden. Measurements will be made mainly on different regeneration types and growth in remaining stands. The forestry board will also study the biodiversity. There will be several sites in northwestern sweden for this study that will be set out following years from 2019 and forward. The pilot study that started in 2019 is located close to the shores lake Stor-Juktan, Sorsele. The project is a collaboration between SLU, Sveaskog and the Swedish Forestry board.

continous-cover forestrylow productive forestsregeneration

7201 Gap trial Kälmyrbränna

PI: Fredrik Sjödin

The aim of this experiment is to study establishment, survival and growth of Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) planted in gaps ofpine dominated forest. Further, the study will also show how the gaps affect the stand increment compared to a stand without gaps. The theory is that the gaps increase incoming light and therefore also the increment.

gapregenerationsprucepine

7206 Gap trial Storkåtatjärnsbäcken

PI: Fredrik Sjödin

The aim ofthis experiment is to study establishment, survival and growth of Scots pine (Pinus ,ylvestris) and Norway spruce (Picea abies) planted in gaps of pine dominated forest. Further, the study will also show how the gaps affect the stand increment compared to a stand without gaps. The theory is that the gaps increase incoming light and therefore also the increment.

gapregenerationsprucepine

Testing the viability of SeedPADs on clearcuts throughout Sweden

PI: Matej Domevscik

We analysed survival, growth and biomass of Scots Pine (Pinus sylvestris) SeedPAD seedlings on 13 clearcuts across Sweden with an aim to understand the driving environmental variables. SeedPADs (SPs) are an alternative method to replant clearcuts after harvest aimed at reducing environmental impact while preserving commercial viability. They comprise of a single seed of P. sylvestris protected by a layer of vermiculate and wrapped in polysaccharide foil, which readily dissolves in water. SeedPADs, along with seedling control, were planted in spring/summer of 2017, then surveyed for survival and height in 2018 and survival, height and biomass in 2019. Among several variables tested, wind speed and precipitation came out significant. Maximum wind speed in the first six weeks after planting showed negative effect, reducing the survival of SeedPADs by up to 32% at 9.6 m/s. The wind effect was evident only on SeedPADs with control seedlings unaffected. Maximum precipitation in the first 6 weeks after planting also showed a positive effect, increasing survival by up to 35% at 31.3 mm/m2/day. For seedling control, higher survival was also measured with increasing altitude and latitude. Overall SeedPADs had a lower average survival of 0.49 ± 0.18, compared to seedling control of 0.7 ± 0.17. SeedPADs were found to be a viable alternative method to pre-grown seedlings under certain conditions, providing a more cost effective solution for replanting and including reduced environmental impact.

SeedPADreplantingregeneration