Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Hannu Hökkä"'
Autor:
Leena Stenberg, Kersti Leppä, Samuli Launiainen, Annamari (Ari) Laurén, Hannu Hökkä, Sakari Sarkkola, Markku Saarinen, Mika Nieminen
Publikováno v:
Forests, Vol 13, Iss 7, p 1134 (2022)
Strip-cutting management has been proposed as an alternative to clear-cuts in drained boreal peatland pine (Pinus sylvestris L.) forests. We explored the hydrological feasibility of strip cutting, that is, under which conditions the post-harvest wate
Externí odkaz:
https://doaj.org/article/3a63b3f14c2c4eda85bcd43d938da152
Autor:
Annamari (Ari) Laurén, Marjo Palviainen, Raija Laiho, Kersti Leppä, Samuli Launiainen, Hannu Hökkä, Mika Nieminen, Iñaki Urzainki, Leena Stenberg
Publikováno v:
Metsätieteen aikakauskirja, Vol 2021, Iss 0 (2021)
Externí odkaz:
https://doaj.org/article/367d91fda04d46b8bc980d224712dd54
Autor:
Kersti Leppä, Hannu Hökkä, Raija Laiho, Samuli Launiainen, Aleksi Lehtonen, Raisa Mäkipää, Mikko Peltoniemi, Markku Saarinen, Sakari Sarkkola, Mika Nieminen
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Continuous cover management on peatland forests has gained interest in recent years, in part because the tree biomass with significant evapotranspiration capacity retained in selection cuttings could be used as a tool to optimize the site water table
Externí odkaz:
https://doaj.org/article/acb505ac16134f2caf09f4d67572923d
Autor:
Jyrki Hytönen, Hannu Hökkä
Publikováno v:
Silva Fennica, Vol 54, Iss 2 (2020)
The effects of wood ash fertilisation on tree nutrition and growth on forested peatlands has been studied using loose ash, but in practice, ash fertilisation is done almost exclusively with granulated ash. In this study, the effects of granulated ash
Externí odkaz:
https://doaj.org/article/8b7f1db478d6430e8e666f53b76cc993
Autor:
Jyrki Hytönen, Hannu Hökkä
Publikováno v:
Metsätieteen aikakauskirja, Vol 2020 (2020)
Externí odkaz:
https://doaj.org/article/39e8d13d1fb24fc893a1cef56310e792
Publikováno v:
Forests, Vol 12, Iss 10, p 1415 (2021)
Three competition indices were tested against experimental data on the growth of individual trees in mapped forest stands and outputs of spatially explicit, process-based models of competition. The comparison showed the fundamental importance of taki
Externí odkaz:
https://doaj.org/article/53f54f4bf4084037a9ddde4628137ff9
Autor:
Ari Laurén, Marjo Palviainen, Samuli Launiainen, Kersti Leppä, Leena Stenberg, Iñaki Urzainki, Mika Nieminen, Raija Laiho, Hannu Hökkä
Publikováno v:
Forests, Vol 12, Iss 3, p 293 (2021)
Drainage is an essential prerequisite in peatland forest management, which generally, but not always, increases stand growth. Growth response depends on weather conditions, stand and site characteristics, management and biogeochemical processes. We c
Externí odkaz:
https://doaj.org/article/964ed1c10f1a48adba33df1ca33a0464
Publikováno v:
Forests, Vol 12, Iss 3, p 312 (2021)
Responsible management of Acacia plantations requires an improved understanding of trade-offs between maintaining stand production whilst reducing environmental impacts. Intensive drainage and the resulting low water tables (WT) increase carbon emiss
Externí odkaz:
https://doaj.org/article/b39a6b92f57f4969b1abd6cb18aaab1a
Autor:
Hannu Hökkä, Jaakko Repola
Publikováno v:
Metsätieteen aikakauskirja, Vol 2018 (2018)
Tutkimuksessa tarkastellaan pienaukkohakkuun uudistumistulosta kahdessa korpikuusikkoon perustetussa kenttäkokeessa. Talvella 2004–2005 hakattiin Tervolan Lintupirtillä 24 kpl läpimitaltaan 10, 15 ja 20 m pienaukkoa ja Oulun Asmonkorvessa 18 kpl
Externí odkaz:
https://doaj.org/article/98dd538a928944879686b0be6bafe0b9
Autor:
Ulf Sikström, Hannu Hökkä
Publikováno v:
Metsätieteen aikakauskirja, Vol 2016, Iss 2 (2016)
Externí odkaz:
https://doaj.org/article/4d8c807310684f989672a8f79e48be3d