Current issue: 58(1)

Under compilation: 58(2)

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Silva Fennica 1926-1997
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1980-1989
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1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'coniferous trees'

Category : Article

article id 5006, category Article
Seppo Kellomäki. (1978). Typpilannoituksen vaikutus havupuiden fotosynteesikapasiteettiin. Silva Fennica vol. 12 no. 3 article id 5006. https://doi.org/10.14214/sf.a14860
English title: Effects of nitrogen fertilization on photosynthetic capacity of coniferous trees.
Original keywords: havupuut; lannoitus; typpilannoitus; fotosynteesikapasiteetti; neulasmassa
English keywords: biomass; photosynthetic capacity; nitrogen fertilization; coniferous trees; needle mass
Abstract | View details | Full text in PDF | Author Info

The effect of nitrogen fertilizers on the photosynthetic capacity of conifers is assessed on the basis of literature. The review emphasizes the role of changes of needle mass as a factor affecting the result of nutrient application. In particular, the increase in needle mass results in a considerable increase in photosynthetic capacity. The effect of fertilization on the photosynthetic rate seems to be of minor importance. The effect on the photosynthetic rate is, however, poorly documented as is the case for the effect of fertilization on the respiration rate. There is evidence that proper application of nitrogen fertilizers may double the photosynthetic capacity of conifers, mainly as a result of increase in needle mass.

The PDF includes a summary in English.

  • Kellomäki, E-mail: sk@mm.unknown (email)

Category : Article

article id 7358, category Article
Arvo Ylinen. (1942). The effect of the amount of the summer wood on the elastic and tensile properties of coniferous trees. Acta Forestalia Fennica vol. 50 no. 5 article id 7358. https://doi.org/10.14214/aff.7358
Keywords: coniferous trees; tensile properties; elasticity; summer wood; autumn wood; linear function
Abstract | View details | Full text in PDF | Author Info

The dependence of elastic and tensile properties of coniferous trees on the share of summer wood can be presented as linear functions, if the soft wood is considered as a statically indefinite structure. By eliminating the share of summer wood by a certain function presented in the article, the elastic and tensile properties are the linear functions of density.

The functions are proved right by conducting strength tests on pine. Practical implications of the derived functions in rating the quality of wood are also presented.

The PDF contains a summary in Finnish. 

  • Ylinen, E-mail: ay@mm.unknown (email)
article id 7528, category Article
Einari Vuori. (1913). Coniferous tree stands of the state forest “Vesijako” reforested through controlled burning. Acta Forestalia Fennica vol. 2 no. 1 article id 7528. https://doi.org/10.14214/aff.7528
Keywords: Alnus incana; grey alder; prescribed burning; forest improvement; coniferous trees; controlled burning; white alder
Abstract | View details | Full text in PDF | Author Info

The study area is state owned forest of Vesijako in southern middle Finland that has earlier been intensively managed with slash-and-burn agriculture. Reforestation of broad-leaved forests into coniferous forest with controlled burning has been studied on 76 sample plots.

The article describes the practice of leasing forest stands to leaseholders who executed the controlled burning and forest regeneration and management according a leasing contract. The results of the reforestation with coniferous trees shows that sowed pine (Pinus silvestris) stands give good results but spruce (Picea abies) must be planted as a seedling.  For the state this method of forest improvement is cost effective  and should be used more widely. 

  • Vuori, E-mail: ev@mm.unknown (email)

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