The journal news feed presents key findings from selected scientific articles from SNS’ scientific journal Scandinavian Journal of Forest Research. The summaries are personal interpretations of the content made by the editor of News & Views.
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More to learn about high-stump thinning to reduce browsing by moose
In Fennoscandia, young stands of Scots pine (Pinus sylvestris) are heavily browsed by moose during the winter. One method suggested to reduce the damage is to create high (>0.5 m) stumps instead of conventional low stumps at precommercial thinning, to increase the amount of forage. In a study in south-central Sweden, high-cut pines were browsed, but to a lesser extent than retained pines. The results also suggest that the additional food supply from the high-cut pines may increase the risk of bark-stripping and stem breakage on retained trees. The density of moose might affect the outcome of the results. High-stump thinning, therefore, needs to be more thoroughly investigated at a larger spatial scale.
Seedling size of Scots pine and Norway spruce not crucial for successful plantations
Seedlings of Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) have seldom been compared when it comes to seedling size, species and geographic location of the planting site. A study carried out on coastal and inland sites in northern Sweden, mainly on mesic soils, showed that the difference in growth between two seedling sizes was moderate for both species. The larger Scots pine seedlings grew more rapidly than the smaller ones and were also the tallest of all seedlings five years after planting. The Scots pine seedlings, however, were more likely to be damaged by pine weevil for a longer period of time. Other factors, like the environment, planting procedure, site preparation and time of planting are equally important for the regeneration results.
Read more: Johansson, K. et al. 2015. Early performance of Pinus sylvestris and Picea abies – a comparison between seedling size, species, and geographic location of planting site. Scand J For Res 30(5), 388-400.
Soil bearing capacity of pine bogs, an important issue in Finland
Peatlands comprise roughly one third of the Finnish forest area and support one quarter of all wood stock. Therefore, knowing the soil bearing capacity of peatlands is crucial for logging. A study in southern Finland investigated various factors affecting the bearing capacities of pine bogs. The results showed that it is possible to estimate moisture content of the peat in early summer with rather good reliability, provided that the tree volume and distance to the closest ditch are known.
A detailed study of private forest owners in Lithuania
Owning a private forest property was banned in Lithuania during Soviet rule. Today, however, 39 % of the forestland is privately owned. Due to the short history of forest ownership, there is little information relating to private forest owners. Eighteen forest owners were closely scrutinized in a Lithuanian study: 83 % were men, the properties ranged in size from one to 3000 ha, more than half of the forest owners had a higher education and four had professional experience of forestry. The syntheses of each forest owners’ goals and practices culminated in four types of private forest owners being identified: forest businessmen, household foresters, passive forest lovers and ad hoc owners. One implication of the findings is that the current regulation of private forestry in Lithuania has a poor fit with the reality.