Survival, height and health status of 20‐year‐old<i>pinus sylvestris</i>and<i>pinus contorta</i>after different scarification treatments in a harsh boreal climate

Hansson, Per; Karlman, Margareta

doi:10.1080/02827589709355421

Cited by 38 publications

(45 citation statements)

References 18 publications

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“…In Nordic growing conditions, effects of soil preparation on success of spruce seedlings are rather well known (Örlander et al 1990, 1998, 2002, Hansson and Karlman 1997, Mäkitalo 1999, Nordborg 2001, Hallsby and Örlander 2004, Saksa et al 2005. Survival of spruce is better and growth faster after an intensive soil preparation, such as spot mounding, compared with the lighter methods, such as disc trenching (Nordborg 2001, Örlander et al 2002, Saksa et al 2005, Nordborg et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil preparation method on economic result of Norway spruce regeneration chain

Uotila

Rantala

Saksa³

et al. 2010

Silva Fenn.

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Economic result of forest regeneration chains, based either on spot mounding or on disc trenching and planting of Norway spruce (Picea abies [L.] Karst.) seedlings, were clarified and compared to each other. First, effects of soil preparation method on early development of Norway spruce stands were measured from field experiments. Second, the effects of soil preparation method on stand level management programs were modelled. The modelling was based on growth simulation and investment calculations. The soil preparation methods substantially affected early development of a stand. The density of the removed trees in early cleaning was 56% higher on the disc-trenched area compared to the spot-mounded area. The difference was especially high (120%), close by (<25 cm) the remained spruce seedlings. There was also a difference between the methods in the growth of crop spruces; at biological age of 8 years, the mean height of spruce was 110 cm on the spot-mounded area and 68 cm on the disc-trenched area. The differences led to divergent management programs between the areas. The disc-trenched area needed three young stand management operations whereas two was enough at the spot-mounded area. Although disc trenching is a less expensive method than spot mounding, the total management costs were higher in disc trenching than in spot mounding. Furthermore, incomes from the first commercial thinning were higher when regeneration based on spot mounding. At the interest rate of 3%, the investment in spot mounding had 329 € ha -1 higher net present value than the investment in disc trenching.

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Section: Introductionmentioning

confidence: 99%

Effect of soil preparation method on economic result of Norway spruce regeneration chain

Uotila

Rantala

Saksa³

et al. 2010

Silva Fenn.

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“…Örlander et al 1990, 1998, Hansson and Karlman 1997, Mäkitalo 1999. However, research on spruce has largely been based on three-to four-year-old bare-root transplants, which have now been phased out.…”

Section: Introductionmentioning

confidence: 99%

Multilevel modelling of height growth in young Norway spruce plantations in southern Finland

Saksa¹,

Heiskanen²,

Miina³

et al. 2005

Silva Fenn.

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Height development of Norway spruce (Picea abies (L.) Karst.) transplants was studied on 22 sites prepared by disc trenching or mounding. At the age of 4-9 years the plantations were surveyed using a multistage sampling design. For every planted spruce on a plot, the past annual height increments were measured as far into the past as possible. Multilevel mixed linear modelling was used to analyse the variation in growth at different levels (year, stand, cluster, plot, tree) and the effects of climatic and site characteristics on height growth. The within-plantation variation in height growth was higher on mounded sites than on disc-trenched sites. The mean temperature and the precipitation sum of the summer months affected height growth positively. Soil characteristics measured from undisturbed soil did not explain the height growth of seedlings on mounded sites, whereas on disc-trenched sites, the depth of the organic layer and the soil temperature had a positive effect and the depth of the eluvial horizon a negative effect. The modelling approach used proved to be a useful method for examining the sources of variation in development of young plantations.

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“…A similar example to mountain pine beetle is attacks by Gremmeniella abietina on LP in parts of northern Sweden. After severe snow conditions in the winter 1993/94, infection of Gremmeniella was very frequent and caused high mortality on LP, while SP suffered much less (Hansson & Karlman 1997). On the other hand, in the same study snow blight (Phacidium infestans) infected the native SP to a considerably higher degree than LP.…”

Section: Discussion Exotic Vs Native Speciesmentioning

confidence: 77%

Growth and survival of lodgepole pine and Scots pine after 25 years in a reciprocal transplant experiment in Canada and Sweden

Fries

Elfving

Ukrainetz

2016

Scandinavian Journal of Forest Research

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Lodgepole pine is native to western North America, but it is also planted as a fast-growing alternative to Scots pine in Sweden. The production of these two species, when grown as native and as exotic species, was compared in a transcontinental two-species provenance experiment. The tests were planted in 1986 on five sites in northwestern Canada and two sites in Sweden, and included full-sib families, half-sib families, seed orchard collections and natural stand seed collections of both species. After 25 years, lodgepole pine produced 48% more volume (m 3 ha −1 ) and had 27% higher survival than Scots pine at one Swedish site, and had similar volume production and survival at a second. In the five Canadian sites, Scots pine produced on average 22% more volume than lodgepole pine. The variation between sites was, however, large. This higher volume of Scots pine in Canada could be due to higher survival (+28%) and less frequent damage; but higher top height for lodgepole pine in Canada indicated higher potential productivity. The results indicate that an exotic species may produce more than the native species, possibly thanks to higher survival, but it is also possible to increase production with successful population selection of the native species.

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Survival, height and health status of 20‐year‐oldpinus sylvestrisandpinus contortaafter different scarification treatments in a harsh boreal climate

Cited by 38 publications

References 18 publications

Effect of soil preparation method on economic result of Norway spruce regeneration chain

Effect of soil preparation method on economic result of Norway spruce regeneration chain

Multilevel modelling of height growth in young Norway spruce plantations in southern Finland

Growth and survival of lodgepole pine and Scots pine after 25 years in a reciprocal transplant experiment in Canada and Sweden

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