NordGen Forest Conference 2016
Mixed forests at the scene
- We do not know enough of the mechanisms behind the productivity of mixed forests, and need more experimental data. This was among the statements made at the NordGen Forest Conference 2016 in VĂ¤xjĂ¶, Sweden, where mixed forests were targeted from different angles.
- Mixed-species forests can fulfil many forest functions and services better than mono-specific stands and receive growing attention in forest science and practice. Hans Pretzsch, professor at the Technical University of Munich has his expertise in silviculture and has worked on different mixes of typical European species. Mixed species combinations can overyield mono-specific stands in terms of volume growth, Pretzsch stated at the conference. Further, it has also been shown how species mixing modifies characteristics of the stand such as the density, tree size distribution, and canopy space filling.
Life used to be so simple
Adalsteinn Sigurgeirsson continued by giving a political perspective to the subject. The Nordic forestry ministers have adopted a strategic roadmap for Nordic cooperation in forestry. The Nordic Forest Solutions document promotes the role of forests in attaining economic, ecological and social sustainability. Sigurgeirsson stated that many of the services from forests wouldnâ€™t be there if it was not for management. Like trails and a mosaic of different forest types. If wood had not had economic value, the bare land could have been a fact like it was in his own country Iceland some decades ago.
Fungal diseases and biodiversity
Iben M. Thomsen from the University of Copenhagen discussed advantages and disadvantages with mixed forest stands when it comes to pathogens. It is important to consider pathogen pressure and risks when deciding about mixed production of forest, she said. It is not just a question of mixture, but how you mix!
Hreinn Oskarsson and Adam Felton rounded up the day with input on recreation and mixed forest biodiversity. One explanation to the small amount of mixed forests in our area is to be found within the social sciences, Felton said. -Many private land ownerâ€™s intentions really is in line with the benefits of mixed forests. But they do not see the mixed forest alternative, or they donâ€™t hear about it from the advisors. It is also a question of communication, he said.
How much mixing?
The NordGen Forest Conference â€śGrowing Mixed Forests - waste or value for the future?â€ť was held in VĂ¤xjĂ¶, Sweden on 20-21 September 2016 and attracted 75 participants from all the Nordic countries as well as Latvia. The moderators at the meeting were Urban Nilsson, SLU and Kjersti BakkebĂ¸ Fjellstad, NordGen Forest.
The second day of the conference was dedicated to several field trials of mixed stands at Asa research station and Tagels GĂĄrd, as well as a presentation from SĂ¶dra SkogsĂ¤garna.
News about the conference at the Icelandic Forest Service (in Icelandic)